Gamma-ray Burst 180314A

(All information courtesy of the instrument teams.)

Previous IAU Circulars

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Results of Observations

GCN/BACODINE POSITION NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 14 Mar 18 00:45:02 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     814129,   Seg_Num: 0
GRB_RA:           99.276d {+06h 37m 06s} (J2000),
                  99.464d {+06h 37m 51s} (current),
                  98.761d {+06h 35m 03s} (1950)
GRB_DEC:         -24.491d {-24d 29' 28"} (J2000),
                 -24.508d {-24d 30' 27"} (current),
                 -24.448d {-24d 26' 51"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       0 [cnts]    Image_Peak=5094 [image_cnts]
TRIGGER_DUR:     80.000 [sec] 
TRIGGER_INDEX:   20000     E_range: 15-50 keV
BKG_INTEN:       0 [cnts]
BKG_TIME:        0.00 SOD {00:00:00.00} UT
BKG_DUR:         0 [sec]
GRB_DATE:        18191 TJD;    73 DOY;   18/03/14
GRB_TIME:        2611.38 SOD {00:43:31.38} UT
GRB_PHI:          35.85 [deg]
GRB_THETA:        42.31 [deg]
SOLN_STATUS:     0x20000013
RATE_SIGNIF:     0.00 [sigma]
IMAGE_SIGNIF:    24.03 [sigma]
MERIT_PARAMS:     +1  +0  +0  +6  +1  +8  +0  +0 +22  +0 
SUN_POSTN:       353.93d {+23h 35m 43s}   -2.62d {-02d 37' 26"}
SUN_DIST:        102.97 [deg]   Sun_angle= -7.0 [hr] (East of Sun)
MOON_POSTN:      315.34d {+21h 01m 23s}  -16.71d {-16d 42' 39"}
MOON_DIST:       125.93 [deg]
MOON_ILLUM:      12 [%]
GAL_COORDS:      233.62,-13.87 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      102.55,-47.53 [deg] ecliptic lon,lat of the burst (or transient)
COMMENTS:        SWIFT-BAT GRB Coordinates.  
COMMENTS:        This is an image trigger.  (The RATE_SIGNIF & BKG_{INTEN, TIME, DUR} are undefined.)  
COMMENTS:        A point_source was found.  
COMMENTS:        This does not match any source in the on-board catalog.  
COMMENTS:        This does not match any source in the ground catalog.  
COMMENTS:        This is a GRB.  
COMMENTS:        This trigger occurred at longitude,latitude = 185.94,-13.32 [deg].  
COMMENTS:           
COMMENTS:        NOTE: This BAT event is temporally(12.0<100sec) coincident with the FERMI_GBM event (trignum=542681004).

red DSS finding chart ps-file

GCN NOTICE

TITLE:           GCN/FERMI NOTICE
NOTICE_DATE:     Wed 14 Mar 18 00:43:44 UT
NOTICE_TYPE:     Fermi-GBM Flight Position
RECORD_NUM:      39
TRIGGER_NUM:     542681004
GRB_RA:          107.600d {+07h 10m 24s} (J2000),
                 107.762d {+07h 11m 03s} (current),
                 107.154d {+07h 08m 37s} (1950)
GRB_DEC:         -36.267d {-36d 16' 00"} (J2000),
                 -36.297d {-36d 17' 50"} (current),
                 -36.184d {-36d 11' 00"} (1950)
GRB_ERROR:       7.70 [deg radius, statistical plus systematic]
GRB_INTEN:       450 [cnts/sec]
DATA_SIGNIF:     14.90 [sigma]
INTEG_TIME:      1.024 [sec]
GRB_DATE:        18191 TJD;    73 DOY;   18/03/14
GRB_TIME:        2599.90 SOD {00:43:19.90} UT
GRB_PHI:         250.00 [deg]
GRB_THETA:        90.00 [deg]
DATA_TIME_SCALE: 1.0240 [sec]
HARD_RATIO:      0.28
LOC_ALGORITHM:   3 (version number of)
MOST_LIKELY:      91%  GRB
2nd_MOST_LIKELY:   7%  Distant Particles
DETECTORS:       0,0,0, 0,1,0, 0,0,1, 0,0,0, 0,0,
SUN_POSTN:       353.93d {+23h 35m 43s}   -2.62d {-02d 37' 27"}
SUN_DIST:        107.35 [deg]   Sun_angle= -7.6 [hr] (East of Sun)
MOON_POSTN:      315.33d {+21h 01m 20s}  -16.71d {-16d 42' 47"}
MOON_DIST:       120.93 [deg]
MOON_ILLUM:      12 [%]
GAL_COORDS:      247.65,-12.15 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      117.43,-58.04 [deg] ecliptic lon,lat of the burst (or transient)
LC_URL:          http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2018/bn180314030/quicklook/glg_lc_medres34_bn180314030.gif
COMMENTS:        Fermi-GBM Flight-calculated Coordinates.  
COMMENTS:        This trigger occurred at longitude,latitude = 12.02,-19.35 [deg].  
COMMENTS:        The LC_URL file will not be created until ~15 min after the trigger.

GCN NOTICE

TITLE:           GCN/FERMI NOTICE
NOTICE_DATE:     Wed 14 Mar 18 00:43:53 UT
NOTICE_TYPE:     Fermi-GBM Flight Position
RECORD_NUM:      49
TRIGGER_NUM:     542681004
GRB_RA:          108.317d {+07h 13m 16s} (J2000),
                 108.503d {+07h 14m 01s} (current),
                 107.806d {+07h 11m 13s} (1950)
GRB_DEC:         -26.100d {-26d 06' 00"} (J2000),
                 -26.132d {-26d 07' 54"} (current),
                 -26.014d {-26d 00' 48"} (1950)
GRB_ERROR:       6.90 [deg radius, statistical plus systematic]
GRB_INTEN:       324 [cnts/sec]
DATA_SIGNIF:     21.30 [sigma]
INTEG_TIME:      4.096 [sec]
GRB_DATE:        18191 TJD;    73 DOY;   18/03/14
GRB_TIME:        2599.90 SOD {00:43:19.90} UT
GRB_PHI:         252.00 [deg]
GRB_THETA:       100.00 [deg]
DATA_TIME_SCALE: 4.0960 [sec]
HARD_RATIO:      0.29
LOC_ALGORITHM:   3 (version number of)
MOST_LIKELY:      90%  GRB
2nd_MOST_LIKELY:   7%  Distant Particles
DETECTORS:       0,0,0, 0,1,0, 0,0,1, 0,0,0, 0,0,
SUN_POSTN:       353.93d {+23h 35m 43s}   -2.62d {-02d 37' 27"}
SUN_DIST:        110.66 [deg]   Sun_angle= -7.6 [hr] (East of Sun)
MOON_POSTN:      315.33d {+21h 01m 20s}  -16.71d {-16d 42' 46"}
MOON_DIST:       129.84 [deg]
MOON_ILLUM:      12 [%]
GAL_COORDS:      238.65, -7.16 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      114.93,-47.97 [deg] ecliptic lon,lat of the burst (or transient)
LC_URL:          http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2018/bn180314030/quicklook/glg_lc_medres34_bn180314030.gif
COMMENTS:        Fermi-GBM Flight-calculated Coordinates.  
COMMENTS:        This trigger occurred at longitude,latitude = 12.02,-19.35 [deg].  
COMMENTS:        The LC_URL file will not be created until ~15 min after the trigger.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 14 Mar 18 00:46:35 UT
NOTICE_TYPE:     Swift-XRT Position
TRIGGER_NUM:     814129,   Seg_Num: 0
GRB_RA:           99.2664d {+06h 37m 03.93s} (J2000),
                  99.4540d {+06h 37m 48.95s} (current),
                  98.7510d {+06h 35m 00.25s} (1950)
GRB_DEC:         -24.4966d {-24d 29' 47.7"} (J2000),
                 -24.5131d {-24d 30' 47.0"} (current),
                 -24.4530d {-24d 27' 10.8"} (1950)
GRB_ERROR:       5.3 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       1.58e-09 [erg/cm2/sec]
GRB_SIGNIF:      8.06 [sigma]
IMG_START_DATE:  18191 TJD;    73 DOY;   18/03/14
IMG_START_TIME:  2770.67 SOD {00:46:10.67} UT,   159.3 [sec] since BAT Trigger Time
TAM[0-3]:        327.66 237.19 261.49 243.36
AMPLIFIER:       2
WAVEFORM:        134
SUN_POSTN:       353.93d {+23h 35m 43s}   -2.62d {-02d 37' 24"}
SUN_DIST:        102.96 [deg]   Sun_angle= -7.0 [hr] (East of Sun)
MOON_POSTN:      315.36d {+21h 01m 26s}  -16.71d {-16d 42' 30"}
MOON_DIST:       125.92 [deg]
MOON_ILLUM:      12 [%]
GAL_COORDS:      233.62,-13.88 [deg] galactic lon,lat of the burst
ECL_COORDS:      102.53,-47.53 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Coordinates.  
COMMENTS:        The XRT position is 0.62 arcmin from the BAT position.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 14 Mar 18 00:46:45 UT
NOTICE_TYPE:     Swift-XRT Image
TRIGGER_NUM:     814129,   Seg_Num: 0
GRB_RA:           99.2664d {+06h 37m 03.9s} (J2000),
                  99.4540d {+06h 37m 48.9s} (current),
                  98.7510d {+06h 35m 00.2s} (1950)
GRB_DEC:         -24.4966d {-24d 29' 47.7"} (J2000),
                 -24.5131d {-24d 30' 47.0"} (current),
                 -24.4530d {-24d 27' 10.8"} (1950)
GRB_ERROR:       5.0 [arcsec, radius, statistical plus systematic]
GRB_INTEN:       65 [cnts]
IMG_START_DATE:  18191 TJD;    73 DOY;   18/03/14
IMG_START_TIME:  2770.67 SOD {00:46:10.67} UT,   159.3 [sec] since BAT Trigger Time
CENTROID_X:      314.47,  raw= 314  [pixels]
CENTROID_Y:      299.65,  raw= 300  [pixels]
ROLL:            261.08 [deg]
GAIN:            1
MODE:            3, Long Image mode
WAVEFORM:        134
EXPO_TIME:       2.50 [sec]
GRB_POS_XRT_Y:   2.96
GRB_POS_XRT_Z:   19.04
IMAGE_URL:       sw00814129000msxps_rw.img
SUN_POSTN:       353.93d {+23h 35m 43s}   -2.62d {-02d 37' 24"}
SUN_DIST:        102.96 [deg]   Sun_angle= -7.0 [hr] (East of Sun)
MOON_POSTN:      315.36d {+21h 01m 26s}  -16.71d {-16d 42' 29"}
MOON_DIST:       125.91 [deg]
MOON_ILLUM:      12 [%]
GAL_COORDS:      233.62,-13.88 [deg] galactic lon,lat of the burst
ECL_COORDS:      102.53,-47.53 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Image.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 14 Mar 18 00:46:49 UT
NOTICE_TYPE:     Swift-XRT Processed Image
TRIGGER_NUM:     814129,   Seg_Num: 0
GRB_RA:           99.2664d {+06h 37m 03.9s} (J2000),
                  99.4540d {+06h 37m 48.9s} (current),
                  98.7510d {+06h 35m 00.2s} (1950)
GRB_DEC:         -24.4966d {-24d 29' 47.7"} (J2000),
                 -24.5131d {-24d 30' 47.0"} (current),
                 -24.4530d {-24d 27' 10.8"} (1950)
GRB_ERROR:       5.0 [arcsec, radius, statistical plus systematic]
GRB_INTEN:       65 [cnts]
IMG_START_DATE:  18191 TJD;    73 DOY;   18/03/14
IMG_START_TIME:  2770.67 SOD {00:46:10.67} UT,   159.3 [sec] since BAT Trigger Time
CENTROID_X:      314.47,  raw= 314  [pixels]
CENTROID_Y:      299.65,  raw= 300  [pixels]
ROLL:            261.08 [deg]
GAIN:            1
MODE:            3, Long Image mode
WAVEFORM:        134
EXPO_TIME:       2.50 [sec]
GRB_POS_XRT_Y:   2.96
GRB_POS_XRT_Z:   19.04
IMAGE_URL:       sw00814129000msxps_rw.img
SUN_POSTN:       353.93d {+23h 35m 44s}   -2.62d {-02d 37' 24"}
SUN_DIST:        102.96 [deg]   Sun_angle= -7.0 [hr] (East of Sun)
MOON_POSTN:      315.36d {+21h 01m 26s}  -16.71d {-16d 42' 29"}
MOON_DIST:       125.91 [deg]
MOON_ILLUM:      12 [%]
GAL_COORDS:      233.62,-13.88 [deg] galactic lon,lat of the burst
ECL_COORDS:      102.53,-47.53 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Processed Image.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 14 Mar 18 00:47:40 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     814129,   Seg_Num: 0
GRB_RA:           99.276d {+06h 37m 06s} (J2000),
                  99.464d {+06h 37m 51s} (current),
                  98.761d {+06h 35m 03s} (1950)
GRB_DEC:         -24.491d {-24d 29' 28"} (J2000),
                 -24.508d {-24d 30' 27"} (current),
                 -24.448d {-24d 26' 51"} (1950)
GRB_DATE:        18191 TJD;    73 DOY;   18/03/14
GRB_TIME:        2611.38 SOD {00:43:31.38} UT
TRIGGER_INDEX:   20000
GRB_PHI:          35.85 [deg]
GRB_THETA:        42.31 [deg]
DELTA_TIME:      0.00 [sec]
TRIGGER_DUR:     80.000 [sec] 
SOLN_STATUS:     0x13
RATE_SIGNIF:     0.00 [sigma]
IMAGE_SIGNIF:    24.03 [sigma]
LC_URL:          sw00814129000msb.lc
SUN_POSTN:       353.93d {+23h 35m 44s}   -2.62d {-02d 37' 23"}
SUN_DIST:        102.97 [deg]   Sun_angle= -7.0 [hr] (East of Sun)
MOON_POSTN:      315.37d {+21h 01m 28s}  -16.71d {-16d 42' 24"}
MOON_DIST:       125.92 [deg]
MOON_ILLUM:      12 [%]
GAL_COORDS:      233.62,-13.87 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      102.55,-47.53 [deg] ecliptic lon,lat of the burst (or transient)
COMMENTS:        SWIFT-BAT GRB Lightcurve.  
COMMENTS:           
COMMENTS:        The next comments were copied from the BAT_POS Notice:  
COMMENTS:        This is an image trigger.  
COMMENTS:        A point_source was found.  
COMMENTS:        This does not match any source in the on-board catalog.  
COMMENTS:        This does not match any source in the ground catalog.  
COMMENTS:        This is a GRB.  
COMMENTS:        This trigger occurred at longitude,latitude = 185.94,-13.32 [deg].

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 14 Mar 18 00:51:17 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     814129,   Seg_Num: 0
POINT_RA:         99.261d {+06h 37m 03s} (J2000)
POINT_DEC:       -24.496d {-24d 29' 45"} (J2000)
POINT_ROLL:      261.082d
IMG_START_DATE:  18191 TJD;    73 DOY;   18/03/14
IMG_START_TIME:  2778.12 SOD {00:46:18.12} UT,   166.7 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        6.793
N_STARS:         140
X_OFFSET:        400 [pixels]
Y_OFFSET:        640 [pixels]
X_MAX:           1359 [pixels]
Y_MAX:           1599 [pixels]
DET_THRESH:      22
PHOTO_THRESH:    14
SL_URL:          sw00814129000msufc0166.fits
SUN_POSTN:       353.93d {+23h 35m 44s}   -2.62d {-02d 37' 20"}
SUN_DIST:        102.95 [deg]   Sun_angle= -7.0 [hr] (East of Sun)
MOON_POSTN:      315.40d {+21h 01m 36s}  -16.70d {-16d 42' 02"}
MOON_DIST:       125.89 [deg]
MOON_ILLUM:      12 [%]
GAL_COORDS:      233.62,-13.88 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      102.53,-47.53 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 14 Mar 18 00:51:37 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     814129,   Seg_Num: 0
POINT_RA:         99.261d {+06h 37m 03s} (J2000)
POINT_DEC:       -24.496d {-24d 29' 45"} (J2000)
POINT_ROLL:      261.082d
IMG_START_DATE:  18191 TJD;    73 DOY;   18/03/14
IMG_START_TIME:  2778.12 SOD {00:46:18.12} UT,   166.7 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        6.793
N_STARS:         140
X_OFFSET:        400 [pixels]
Y_OFFSET:        640 [pixels]
X_MAX:           1359 [pixels]
Y_MAX:           1599 [pixels]
DET_THRESH:      22
PHOTO_THRESH:    14
SL_URL:          sw00814129000msufc0166.fits
SUN_POSTN:       353.93d {+23h 35m 44s}   -2.62d {-02d 37' 19"}
SUN_DIST:        102.95 [deg]   Sun_angle= -7.0 [hr] (East of Sun)
MOON_POSTN:      315.40d {+21h 01m 36s}  -16.70d {-16d 42' 00"}
MOON_DIST:       125.89 [deg]
MOON_ILLUM:      12 [%]
GAL_COORDS:      233.62,-13.88 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      102.53,-47.53 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Processed Source List.  
COMMENTS:        All 4 attachments are included.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 14 Mar 18 00:52:55 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     814129,   Seg_Num: 0
POINT_RA:         99.261d {+06h 37m 03s} (J2000)
POINT_DEC:       -24.496d {-24d 29' 45"} (J2000)
ROLL:            261.082d
IMG_START_DATE:  18191 TJD;    73 DOY;   18/03/14
IMG_START_TIME:  2778.12 SOD {00:46:18.12} UT,   166.7 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     542681198
X_OFFSET:        761 [pixels]
Y_OFFSET:        903 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       921
Y_GRB_POS:       1063
BINNING_INDEX:   1
IM_URL:          sw00814129000msuni0187.fits
SUN_POSTN:       353.94d {+23h 35m 44s}   -2.62d {-02d 37' 18"}
SUN_DIST:        102.95 [deg]   Sun_angle= -7.0 [hr] (East of Sun)
MOON_POSTN:      315.41d {+21h 01m 39s}  -16.70d {-16d 41' 53"}
MOON_DIST:       125.89 [deg]
MOON_ILLUM:      12 [%]
GAL_COORDS:      233.62,-13.88 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      102.53,-47.53 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Image.  
COMMENTS:        The GRB Position came from the XRT Position Command.  
COMMENTS:        The image has 2x2 binning (compression).

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 14 Mar 18 00:53:10 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     814129,   Seg_Num: 0
POINT_RA:         99.261d {+06h 37m 03s} (J2000)
POINT_DEC:       -24.496d {-24d 29' 45"} (J2000)
ROLL:            261.082d
IMG_START_DATE:  18191 TJD;    73 DOY;   18/03/14
IMG_START_TIME:  2778.12 SOD {00:46:18.12} UT,   166.7 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     542681198
X_OFFSET:        761 [pixels]
Y_OFFSET:        903 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       921
Y_GRB_POS:       1063
BINNING_INDEX:   1
IM_URL:          sw00814129000msuni0187.fits
SUN_POSTN:       353.94d {+23h 35m 44s}   -2.62d {-02d 37' 18"}
SUN_DIST:        102.95 [deg]   Sun_angle= -7.0 [hr] (East of Sun)
MOON_POSTN:      315.42d {+21h 01m 40s}  -16.70d {-16d 41' 51"}
MOON_DIST:       125.88 [deg]
MOON_ILLUM:      12 [%]
GAL_COORDS:      233.62,-13.88 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      102.53,-47.53 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Processed Image.  
COMMENTS:        The GRB Position came from the XRT Position Command.  
COMMENTS:        The image has 2x2 binning (compression).  
COMMENTS:        All 4 attachments are included.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 14 Mar 18 00:55:07 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     814129,   Seg_Num: 0
POINT_RA:         99.260d {+06h 37m 02s} (J2000)
POINT_DEC:       -24.499d {-24d 29' 54"} (J2000)
POINT_ROLL:      261.083d
IMG_START_DATE:  18191 TJD;    73 DOY;   18/03/14
IMG_START_TIME:  2937.36 SOD {00:48:57.36} UT,   326.0 [sec] since BAT Trigger Time
FILTER:          7, U
BKG_MEAN:        2.154
N_STARS:         106
X_OFFSET:        441 [pixels]
Y_OFFSET:        583 [pixels]
X_MAX:           1400 [pixels]
Y_MAX:           1542 [pixels]
DET_THRESH:      12
PHOTO_THRESH:    6
SL_URL:          sw00814129000msufc0325.fits
SUN_POSTN:       353.94d {+23h 35m 45s}   -2.62d {-02d 37' 16"}
SUN_DIST:        102.95 [deg]   Sun_angle= -7.0 [hr] (East of Sun)
MOON_POSTN:      315.43d {+21h 01m 44s}  -16.69d {-16d 41' 39"}
MOON_DIST:       125.87 [deg]
MOON_ILLUM:      12 [%]
GAL_COORDS:      233.62,-13.88 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      102.53,-47.54 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 14 Mar 18 00:55:33 UT
NOTICE_TYPE:     Swift-UVOT Position
TRIGGER_NUM:     814129,   Seg_Num: 0
GRB_RA:           99.2653d {+06h 37m 03.67s} (J2000),
                  99.4529d {+06h 37m 48.69s} (current),
                  98.7499d {+06h 35m 00.01s} (1950)
GRB_DEC:         -24.4961d {-24d 29' 45.9"} (J2000),
                 -24.5126d {-24d 30' 45.2"} (current),
                 -24.4525d {-24d 27' 09.0"} (1950)
GRB_ERROR:       0.6 [arcsec radius, statistical only]
GRB_MAG:         16.27 +/- 0.14 [mag]
FILTER:          10, White
IMG_START_DATE:  18191 TJD;    73 DOY;   18/03/14
IMG_START_TIME:  2775.00 SOD {00:46:15.00} UT,   163.6 [sec] since BAT Trigger Time
SUN_POSTN:       353.94d {+23h 35m 45s}   -2.62d {-02d 37' 15"}
SUN_DIST:        102.95 [deg]   Sun_angle= -7.0 [hr] (East of Sun)
MOON_POSTN:      315.44d {+21h 01m 45s}  -16.69d {-16d 41' 37"}
MOON_DIST:       125.88 [deg]
MOON_ILLUM:      12 [%]
GAL_COORDS:      233.62,-13.88 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      102.53,-47.53 [deg] ecliptic lon,lat of the burst (or transient)
COMMENTS:        SWIFT UVOT Position Notice.  
COMMENTS:        This Notice was ground-generated -- not flight-generated.  
COMMENTS:        The UVOT position is 4.0 arcsec from the XRT position.  
COMMENTS:        Result based on Genie data.  
COMMENTS:        Notice generated automatically.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 14 Mar 18 00:55:24 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     814129,   Seg_Num: 0
POINT_RA:         99.260d {+06h 37m 02s} (J2000)
POINT_DEC:       -24.499d {-24d 29' 54"} (J2000)
POINT_ROLL:      261.083d
IMG_START_DATE:  18191 TJD;    73 DOY;   18/03/14
IMG_START_TIME:  2937.36 SOD {00:48:57.36} UT,   326.0 [sec] since BAT Trigger Time
FILTER:          7, U
BKG_MEAN:        2.154
N_STARS:         106
X_OFFSET:        441 [pixels]
Y_OFFSET:        583 [pixels]
X_MAX:           1400 [pixels]
Y_MAX:           1542 [pixels]
DET_THRESH:      12
PHOTO_THRESH:    6
SL_URL:          sw00814129000msufc0325.fits
SUN_POSTN:       353.94d {+23h 35m 45s}   -2.62d {-02d 37' 15"}
SUN_DIST:        102.95 [deg]   Sun_angle= -7.0 [hr] (East of Sun)
MOON_POSTN:      315.43d {+21h 01m 44s}  -16.69d {-16d 41' 38"}
MOON_DIST:       125.87 [deg]
MOON_ILLUM:      12 [%]
GAL_COORDS:      233.62,-13.88 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      102.53,-47.54 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Processed Source List.  
COMMENTS:        All 4 attachments are included.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 14 Mar 18 00:56:31 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     814129,   Seg_Num: 0
POINT_RA:         99.260d {+06h 37m 02s} (J2000)
POINT_DEC:       -24.499d {-24d 29' 54"} (J2000)
ROLL:            261.083d
IMG_START_DATE:  18191 TJD;    73 DOY;   18/03/14
IMG_START_TIME:  2937.36 SOD {00:48:57.36} UT,   326.0 [sec] since BAT Trigger Time
FILTER:          7, U
EXPOSURE_ID:     542681357
X_OFFSET:        761 [pixels]
Y_OFFSET:        903 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       921
Y_GRB_POS:       1063
BINNING_INDEX:   1
IM_URL:          sw00814129000msuni0346.fits
SUN_POSTN:       353.94d {+23h 35m 45s}   -2.62d {-02d 37' 14"}
SUN_DIST:        102.95 [deg]   Sun_angle= -7.0 [hr] (East of Sun)
MOON_POSTN:      315.44d {+21h 01m 47s}  -16.69d {-16d 41' 31"}
MOON_DIST:       125.87 [deg]
MOON_ILLUM:      12 [%]
GAL_COORDS:      233.62,-13.88 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      102.53,-47.54 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Image.  
COMMENTS:        The GRB Position came from the XRT Position Command.  
COMMENTS:        The image has 2x2 binning (compression).

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 14 Mar 18 00:56:40 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     814129,   Seg_Num: 0
POINT_RA:         99.260d {+06h 37m 02s} (J2000)
POINT_DEC:       -24.499d {-24d 29' 54"} (J2000)
ROLL:            261.083d
IMG_START_DATE:  18191 TJD;    73 DOY;   18/03/14
IMG_START_TIME:  2937.36 SOD {00:48:57.36} UT,   326.0 [sec] since BAT Trigger Time
FILTER:          7, U
EXPOSURE_ID:     542681357
X_OFFSET:        761 [pixels]
Y_OFFSET:        903 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       921
Y_GRB_POS:       1063
BINNING_INDEX:   1
IM_URL:          sw00814129000msuni0346.fits
SUN_POSTN:       353.94d {+23h 35m 45s}   -2.62d {-02d 37' 14"}
SUN_DIST:        102.95 [deg]   Sun_angle= -7.0 [hr] (East of Sun)
MOON_POSTN:      315.45d {+21h 01m 47s}  -16.69d {-16d 41' 30"}
MOON_DIST:       125.87 [deg]
MOON_ILLUM:      12 [%]
GAL_COORDS:      233.62,-13.88 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      102.53,-47.54 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Processed Image.  
COMMENTS:        The GRB Position came from the XRT Position Command.  
COMMENTS:        The image has 2x2 binning (compression).  
COMMENTS:        All 4 attachments are included.

GCN Circular #22478
P. D'Avanzo (INAF-OAB), A. Deich (PSU), J. A. Kennea (PSU), F. E. Marshall (NASA/GSFC), D. M. Palmer (LANL), B. Sbarufatti (PSU), M. H. Siegel (PSU) and A. Tohuvavohu (PSU) report on behalf of the Neil Gehrels Swift Observatory Team:
At 00:43:31 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 180314A (trigger=814129). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 99.276, -24.491 which is
```
   RA(J2000) = 06h 37m 06s
   Dec(J2000) = -24d 29' 28"
```
with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve showed a complex structure with a duration of about 40 sec. The peak count rate was ~3000 counts/sec (15-350 keV), at ~4 sec after the trigger.
The XRT began observing the field at 00:46:10.6 UT, 159.3 seconds after the BAT trigger. Using promptly downlinked data we find a bright, uncatalogued X-ray source located at RA, Dec 99.26519, -24.49603 which is equivalent to:
```
   RA(J2000)  = 06h 37m 03.65s
   Dec(J2000) = -24d 29' 45.7"
```
with an uncertainty of 3.7 arcseconds (radius, 90% containment). This location is 39 arcseconds from the BAT onboard position, within the BAT error circle. This position may be improved as more data are received; the latest position is available at http://www.swift.ac.uk/sper. We cannot determine whether the source is fading at the present time.
A power-law fit to a spectrum formed from promptly downlinked event data gives a column density consistent with the Galactic value of 1.50 x 10^21 cm^-2 (Willingale et al. 2013).
The initial flux in the 2.5 s image was 1.58e-09 erg cm^-2 s^-1 (0.2-10 keV).
UVOT took a finding chart exposure of 150 seconds with the White filter starting 166 seconds after the BAT trigger. There is a candidate afterglow in the rapidly available 2.7'x2.7' sub-image at
```
  RA(J2000)  =	06:37:03.68 =  99.26532
  DEC(J2000) = -24:29:46.0  = -24.49612
```
with a 90%-confidence error radius of about 0.61 arc sec. This position is 2.8 arc sec. from the center of the XRT error circle. The estimated magnitude is 16.27 with a 1-sigma error of about 0.14. No correction has been made for the expected extinction corresponding to E(B-V) of 0.08.
Burst Advocate for this burst is P. D'Avanzo (paolo.davanzo AT brera.inaf.it). Please contact the BA by email if you require additional information regarding Swift followup of this burst. In extremely urgent cases, after trying the Burst Advocate, you can contact the Swift PI by phone (see Swift TOO web site for information: http://www.swift.psu.edu/too.html.)

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 14 Mar 18 01:02:31 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     814129,   Seg_Num: 0
POINT_RA:         99.260d {+06h 37m 02s} (J2000)
POINT_DEC:       -24.499d {-24d 29' 54"} (J2000)
POINT_ROLL:      261.083d
IMG_START_DATE:  18191 TJD;    73 DOY;   18/03/14
IMG_START_TIME:  3492.28 SOD {00:58:12.28} UT,   880.9 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        2.646
N_STARS:         190
X_OFFSET:        201 [pixels]
Y_OFFSET:        343 [pixels]
X_MAX:           1640 [pixels]
Y_MAX:           1782 [pixels]
DET_THRESH:      13
PHOTO_THRESH:    7
SL_URL:          sw00814129000msufc0880.fits
SUN_POSTN:       353.94d {+23h 35m 46s}   -2.62d {-02d 37' 08"}
SUN_DIST:        102.95 [deg]   Sun_angle= -7.0 [hr] (East of Sun)
MOON_POSTN:      315.50d {+21h 01m 59s}  -16.68d {-16d 40' 55"}
MOON_DIST:       125.84 [deg]
MOON_ILLUM:      12 [%]
GAL_COORDS:      233.62,-13.88 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      102.53,-47.54 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 14 Mar 18 01:03:11 UT
NOTICE_TYPE:     Swift-XRT Position UPDATE
TRIGGER_NUM:     814129,   Seg_Num: 0
GRB_RA:           99.2651d {+06h 37m 03.62s} (J2000),
                  99.4527d {+06h 37m 48.64s} (current),
                  98.7497d {+06h 35m 00.06s} (1950)
GRB_DEC:         -24.4967d {-24d 29' 48.1"} (J2000),
                 -24.5132d {-24d 30' 47.4"} (current),
                 -24.4531d {-24d 27' 11.2"} (1950)
GRB_ERROR:       2.1 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       1.00e-10 [erg/cm2/sec]
GRB_SIGNIF:      10.00 [sigma]
IMG_START_DATE:  18191 TJD;    73 DOY;   18/03/14
IMG_START_TIME:  2975.00 SOD {00:49:35.00} UT,   363.6 [sec] since BAT Trigger Time
TAM[0-3]:        100.00 100.00 100.00 100.00
AMPLIFIER:       1
WAVEFORM:        31
SUN_POSTN:       353.94d {+23h 35m 46s}   -2.62d {-02d 37' 08"}
SUN_DIST:        102.95 [deg]   Sun_angle= -7.0 [hr] (East of Sun)
MOON_POSTN:      315.50d {+21h 02m 00s}  -16.68d {-16d 40' 51"}
MOON_DIST:       125.84 [deg]
MOON_ILLUM:      12 [%]
GAL_COORDS:      233.62,-13.88 [deg] galactic lon,lat of the burst
ECL_COORDS:      102.53,-47.53 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Coordinates.  
COMMENTS:        This Notice was ground-generated -- not flight-generated.  
COMMENTS:        This is an Update Notice -- the RA,Dec values herein supersede the previous XRT_POS Notice.  
COMMENTS:        TAM values, flux and significance fields are not valid.  
COMMENTS:        This position was automatically generated on the ground using  
COMMENTS:        Photon Counting data telemetered via TDRSS (SPER data).  
COMMENTS:        See http://www.swift.ac.uk/sper/docs.php for details.  
COMMENTS:        This position was enhanced using UVOT field astrometry.  
COMMENTS:        The probability that this is a serendipitous source in the  
COMMENTS:        SPER window is 0.11% < P(seren) < 0.58%.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 14 Mar 18 01:02:51 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     814129,   Seg_Num: 0
POINT_RA:         99.260d {+06h 37m 02s} (J2000)
POINT_DEC:       -24.499d {-24d 29' 54"} (J2000)
POINT_ROLL:      261.083d
IMG_START_DATE:  18191 TJD;    73 DOY;   18/03/14
IMG_START_TIME:  3492.28 SOD {00:58:12.28} UT,   880.9 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        2.646
N_STARS:         190
X_OFFSET:        201 [pixels]
Y_OFFSET:        343 [pixels]
X_MAX:           1640 [pixels]
Y_MAX:           1782 [pixels]
DET_THRESH:      13
PHOTO_THRESH:    7
SL_URL:          sw00814129000msufc0880.fits
SUN_POSTN:       353.94d {+23h 35m 46s}   -2.62d {-02d 37' 08"}
SUN_DIST:        102.95 [deg]   Sun_angle= -7.0 [hr] (East of Sun)
MOON_POSTN:      315.50d {+21h 02m 00s}  -16.68d {-16d 40' 53"}
MOON_DIST:       125.84 [deg]
MOON_ILLUM:      12 [%]
GAL_COORDS:      233.62,-13.88 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      102.53,-47.54 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Processed Source List.  
COMMENTS:        All 4 attachments are included.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 14 Mar 18 01:03:59 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     814129,   Seg_Num: 0
POINT_RA:         99.260d {+06h 37m 02s} (J2000)
POINT_DEC:       -24.499d {-24d 29' 54"} (J2000)
ROLL:            261.083d
IMG_START_DATE:  18191 TJD;    73 DOY;   18/03/14
IMG_START_TIME:  3492.28 SOD {00:58:12.28} UT,   880.9 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     542681912
X_OFFSET:        760 [pixels]
Y_OFFSET:        902 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       920
Y_GRB_POS:       1062
BINNING_INDEX:   1
IM_URL:          sw00814129000msuni0901.fits
SUN_POSTN:       353.94d {+23h 35m 46s}   -2.62d {-02d 37' 07"}
SUN_DIST:        102.95 [deg]   Sun_angle= -7.0 [hr] (East of Sun)
MOON_POSTN:      315.51d {+21h 02m 02s}  -16.68d {-16d 40' 46"}
MOON_DIST:       125.84 [deg]
MOON_ILLUM:      12 [%]
GAL_COORDS:      233.62,-13.88 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      102.53,-47.54 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Image.  
COMMENTS:        The GRB Position came from the Window Position in the Mode Command.  
COMMENTS:        The image has 2x2 binning (compression).

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 14 Mar 18 01:04:08 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     814129,   Seg_Num: 0
POINT_RA:         99.260d {+06h 37m 02s} (J2000)
POINT_DEC:       -24.499d {-24d 29' 54"} (J2000)
ROLL:            261.083d
IMG_START_DATE:  18191 TJD;    73 DOY;   18/03/14
IMG_START_TIME:  3492.28 SOD {00:58:12.28} UT,   880.9 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     542681912
X_OFFSET:        760 [pixels]
Y_OFFSET:        902 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       920
Y_GRB_POS:       1062
BINNING_INDEX:   1
IM_URL:          sw00814129000msuni0901.fits
SUN_POSTN:       353.94d {+23h 35m 46s}   -2.62d {-02d 37' 07"}
SUN_DIST:        102.94 [deg]   Sun_angle= -7.0 [hr] (East of Sun)
MOON_POSTN:      315.51d {+21h 02m 02s}  -16.68d {-16d 40' 46"}
MOON_DIST:       125.84 [deg]
MOON_ILLUM:      12 [%]
GAL_COORDS:      233.62,-13.88 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      102.53,-47.54 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Processed Image.  
COMMENTS:        The GRB Position came from the Window Position in the Mode Command.  
COMMENTS:        The image has 2x2 binning (compression).  
COMMENTS:        All 4 attachments are included.

GCN Circular #22479
J. Bolmer (ESO/MPE) reports:
I observed the field of GRB 180314A (Swift trigger 814129; P. D'Avanzo et al., GCN 22478) simultaneously in g'r'i'z'JHK with GROND (Greiner et al. 2008, PASP 120, 405) mounted at the 2.2 m MPG telescope at ESO La Silla Observatory (Chile).
Observations started at 00:47 UT on March 14, 2018, 4 minutes after the GRB trigger. They were performed at an average seeing of 1".1 and at an average airmass of 1.03.
We clearly detect the NIR/optical transient of GRB 180314A at the position reported by P. D'Avanzo et al. (GCN 22478). Based on total exposure of 200 seconds in g=E2=80=99r=E2=80=99i'z' at a midtime of 00:50 UT, 7 minutes after the burst, we measure the following preliminary magnitudes (AB magnitude system):
```
g' =3D 17.87 +/- 0.01 mag,
r' =3D 17.57 +/- 0.02 mag,
i' =3D 17.36 +/- 0.03 mag,
z' =3D 17.25 +/- 0.03 mag
```
Magnitudes are calibrated against PanSTARRS field stars and are not corrected for the Galactic foreground extinction corresponding to a reddening of E_(B-V)=3D 0.07 mag in the direction of the burst (Schlegel et al. 1998).
Observations are continuing.
GCN Circular #22480
J.P. Osborne, A.P. Beardmore, P.A. Evans and M.R. Goad (U. Leicester) report on behalf of the Swift-XRT team.
Using 1353 s of XRT Photon Counting mode data and 1 UVOT images for GRB 180314A, we find an astrometrically corrected X-ray position (using the XRT-UVOT alignment and matching UVOT field sources to the USNO-B1 catalogue): RA, Dec = 99.26522, -24.49627 which is equivalent to:
```
RA (J2000): 06h 37m 3.65s
Dec (J2000): -24d 29' 46.6"
```
with an uncertainty of 1.8 arcsec (radius, 90% confidence).
This position may be improved as more data are received. The latest position can be viewed at http://www.swift.ac.uk/xrt_positions. Position enhancement is described by Goad et al. (2007, A&A, 476, 1401) and Evans et al. (2009, MNRAS, 397, 1177).
This circular was automatically generated, and is an official product of the Swift-XRT team.
GCN Circular #22481
V. Lipunov, E.Gorbovskoy, N.Tyurina, V.Kornilov, D.Zimnukhov, V.Vladimirov, A.Krylov, I.Gorbunov, P.Balanutsa, A.Kuznetsov, V.Chazov, D. Kuvshinov (Lomonosov Moscow State University, SAI),
R. Rebolo, M. Serra-Ricart (The Instituto de Astrofisica de Canarias),
R.Podesta, C.Lopez, F. Podesta (Observatorio Astronomico Felix Aguilar (OAFA),National University of San Juan, Argentina),
H. Levato, C. Saffe (Instituto de Ciencias Astronomicas,de la Tierra y del Espacio (ICATE), San Juan, Argentina),
D.Buckley, S. Potter (South African Astronomical Observatory),
O.Gres, N.M.Budnev (Irkutsk State University),
A. Tlatov, V.Senik, D. Dormidontov (Kislovodsk Solar Station of the Pulkovo Observatory)
V.Yurkov, A.Gabovich, Yu.Sergienko (Blagoveschensk Educational State University, Blagoveschensk),
MASTER-IAC and MASTER-OAFA automatically pointed to GRB 180314A (D'Avanzo et al. GCN 22478, Osborne et al. GCN 22480) with optical transient detection by MASTER auto-detection system. We confirm Swift and GROND OT (D'Avanzo et al. GCN 22478, Bolmer et al. GCN 22479).
There are also synchronous images from MASTER very wide field cameras (MASTER-VWFC).
MASTER-IAC robotic telescope (MASTER-Net: http://observ.pereplet.ru ,Lipunov et al. Advances in Astronomy, 2010, 30L) located in Teyde observatory(Spain) was pointed to the GRB180314.03 7 sec after notice time and 100 sec after trigger time at 2018-03-14 00:45:11 UT. On our first (20s exposure) set we found 1 optical transient within SWIFT error-box (ra=99.275 dec=-24.4908 r=0.05) :
```
  T-Tmid      Date      Time       Expt.        Ra                Dec         Mag
---------|---------------------|-------|-----------------|-----------------|-------
      110   2018-03-14 00:45:11      20   (  6h 37m 03.7s , -24d 29m 45.8s)    15.36
```
The 5-sigma upper limit on the first 20s image is 17.2mag
The observations made on zenit distance = 83 degrees, galaxy latitude b = -13 degree. The moon (12 % bright part) below the horizon (The altitude of the Moon is -59 degree ). The sun altitude is -63.5 degree.
MASTER-OAFA robotic telescope located in Argentina was pointed to the GRB180314A 17 sec after notice time and 110 sec after trigger time at 2018-03-14 00:45:21 UT. On our first (20s exposure) set we found 1 optical transient within SWIFT error-box (ra=99.275 dec=-24.4908 r=0.05)
```
  T-Tmid      Date      Time       Expt.        Ra                Dec           Mag
---------|---------------------|-------|-----------------|-----------------|-------
      120   2018-03-14 00:45:21      20   (  6h 37m 03.7s , -24d 29m 45.8s)    15.60
```
The 5-sigma upper limit on first 20s image is 18.4 mag
The observations made on zenit distance = 15 degrees, galaxy latitude b = -13 degree. The moon (12 % bright part) below the horizon (The altitude of the Moon is -37 degree ). The sun altitude is -23.5 degree.
The message may be cited.
GCN Circular #22482
A. Melandri, P. D'Avanzo, S. Covino, D. Fugazza (INAF/OAB) report on behalf of the REM team:
We observed the field of the GRB 180314A (D'Avanzo et al., GCN 22478) with the 60-cm robotic telescope REM located at the La Silla Observatory (Chile). The observations started at 00:45:38 UT, about 2 min after the burst, and were carried out for the first hour in the JHK bands. Then observations continued in the g, r, i, z, J, H and K bands.
A preliminary analysis shows that the optical counterpart (D'Avanzo et al., GCN 22478; Bolmer, GCN 22479; Lipunov et al., GCN 22481) is well detected and at a mid time of 165 seconds after the burst it was:
H = 12.9 +/- 0.1 (Vega)
Magnitude is calibrated against the 2MASS catalog.
GCN Circular #22483
S. R. Oates (U.Warwick) and P. D'Avanzo (INAF-OAB) report on behalf of the Swift/UVOT team:
The Swift/UVOT began settled observations of the field of GRB 180314A 167 s after the BAT trigger (D'Avanzo et al., GCN Circ. 22478). A source consistent with the XRT position (Osborne et al. GCN Circ. 22480) is detected in the initial UVOT exposures.
The preliminary UVOT position is:
```
   RA  (J2000) =  06:37:03.68 =  99.26535 (deg.)
   Dec (J2000) = -24:29:46.0  = -24.49610 (deg.)
```
with an estimated uncertainty of 0.42 arc sec. (radius, 90% confidence).
Preliminary detections using the UVOT photometric system (Breeveld et al. 2011, AIP Conf. Proc. 1358, 373) for the early exposures are:
```
Filter         T_start(s)   T_stop(s)      Exp(s)           Mag

white(FC)          167          317          147         16.28 +/- 0.03
white              606          626           19         17.86 +/- 0.15
v                  829          849           19         17.07 +/- 0.25
b                  755          774           19         18.09 +/- 0.28
u                  326          576          246         16.95 +/- 0.06
w1                 705         1131           39         17.98 +/- 0.33
m2                 680         1106           58         18.12 +/- 0.35
w2                 631         1578          117         18.75 +/- 0.30
```
The magnitudes in the table are not corrected for the Galactic extinction due to the reddening of E(B-V) = 0.08 in the direction of the burst (Schlegel et al. 1998).
GCN Circular #22484
B. Sbarufatti (INAF/Brera PSU), J. Bolmer (MPE), A. De Ugarte Postigo (IAA/CSIC and DARK/NBI), J. P. U. Fynbo (DAWN/NBI), J. Selsing (DARK/NBI), K. E. Heintz (Univ. Iceland and DAWN/NBI), D. Malesani (DAWN/NBI and DARK/NBI), N. R. Tanvir (Univ. Leicester), A. J. Levan (Univ. Warwick), A. Smette (ESO), K. Wiersema (Univ. Warwick), S. Covino (INAF/Brera), report on behalf of the Stargate collaboration:
We observed the optical counterpart of GRB 180314A (D'Avanzo et al., GCN 22478; Bolmer, GCN 22479) with the ESO/VLT UT2 equipped with the X-shooter spectrograph. Observations started on Mar 14.067 UT (53.3 min after the GRB) and covered the wavelength range 3000-20000 AA. In our acquisition image, we measure for the afterglow r = 18.87 +- 0.05 AB, calibrated to the Pan-STARRS catalog. The afterglow position is RA = 06:37:03.66, Dec = -24:29:46.2, consistent with the UVOT position (D'Avanzo et al., GCN 22478).
A high-S/N continuum is detected in all arms (reaching ~3100 AA in the blue end). We identify several absorption features, including Mg II, Zn II, Al II, Al III, Cr II, Fe II at a common redshift z = 1.445. We also detect at least one Fe II* fine-structure line at the same redshift, thus confirming the association of this system with GRB 180314A.
We acknowledge excellent support from the observing staff in Paranal, in particular Boris Haeussler and Zahed Wahhaj.
GCN Circular #22485
E. Bissaldi (Politecnico & INFN Bari) and O. Roberts (USRA) report on behalf of the Fermi GBM Team:
"At 00:43:19.90 UT on 14 March 2018, the Fermi Gamma-Ray Burst Monitor triggered and located GRB 180314A (trigger 542681004 / 180314030), which was also detected by the Swift/BAT (D'Avanzo et al. 2018, GCN 22478). The GBM on-ground location is consistent with the Swift position.
The angle from the Fermi LAT boresight at the GBM trigger time is 99 degrees.
The GBM light curve consists of single emission episode with a duration (T90) of about 28 s (50-300 keV). The time-averaged spectrum from T0-1 s to T0+30 s is well fit by a power law function with an exponential high-energy cutoff. The power law index is -0.36 +/- 0.06 and the cutoff energy, parameterized as Epeak, is 104 +/- 3 keV.
The event fluence (10-1000 keV) in this time interval is (1.52 +/- 0.03)E-05 erg/cm^2. The 1-sec peak photon flux measured starting from T0+15.3 s in the 10-1000 keV band is 10.5 +/- 0.5 ph/s/cm^2.
The spectral analysis results presented above are preliminary; final results will be published in the GBM GRB Catalog."
GCN Circular #22486
S. J. LaPorte (PSU), J.A. Kennea (PSU), A.P. Beardmore (U. Leicester), P.A. Evans (U. Leicester), S.L. Gibson (U. Leicester), A. D'Ai (INAF-IASFPA), A. Melandri (INAF-OAB), B. Sbarufatti (INAF-OAB/PSU) and P. D'Avanzo report on behalf of the Swift-XRT team:
We have analysed 8.7 ks of XRT data for GRB 180314A (D'Avanzo et al. GCN Circ. 22478), from 165 s to 37.0 ks after the BAT trigger. The data comprise 181 s in Windowed Timing (WT) mode with the remainder in Photon Counting (PC) mode. The enhanced XRT position for this burst was given by Osborne et al. (GCN Circ. 22480).
The light curve can be modelled with a series of power-law decays. The initial decay index is alpha=2.60 (+0.04, -0.17). At T+328 s the decay steepens to an alpha of 5.8 (+2.2, -1.0) before breaking again at T+401 s to a final decay with index alpha=0.94 (+/-0.03).
A spectrum formed from the WT mode data can be fitted with an absorbed power-law with a photon spectral index of 2.34 (+0.08, -0.04). The best-fitting absorption column is consistent with the Galactic value of 1.5 x 10^21 cm^-2 (Willingale et al. 2013). The PC mode spectrum has a photon index of 1.77 (+/-0.07) and a best-fitting absorption column consistent with the Galactic value. The counts to observed (unabsorbed) 0.3-10 keV flux conversion factor deduced from this spectrum is 3.9 x 10^-11 (4.7 x 10^-11) erg cm^-2 count^-1.
A summary of the PC-mode spectrum is thus:
```
Galactic foreground: 1.5 x 10^21 cm^-2
Intrinsic column:    1.5 (+0.8, -0.0) x 10^21 cm^-2 at z=1.445
Photon index:	     1.77 (+/-0.07)
```
If the light curve continues to decay with a power-law decay index of 0.94, the count rate at T+24 hours will be 0.014 count s^-1, corresponding to an observed (unabsorbed) 0.3-10 keV flux of 5.7 x 10^-13 (6.9 x 10^-13) erg cm^-2 s^-1.
The results of the XRT-team automatic analysis are available at http://www.swift.ac.uk/xrt_products/00814129.
This circular is an official product of the Swift-XRT team.
GCN Circular #22487
C. Guidorzi, R. Martone (U. Ferrara), S. Kobayashi (LJMU), C.G. Mundell=20 (U. Bath), A. Gomboc (U. Nova Gorica), I.A. Steele (LJMU) on behalf of a=20 large collaboration report:
We observed the field of Swift GRB180314A (D'Avanzo et al. GCN 22478) on=20 March 14, from 10:00 to 10:25 UT (mid time of 0.39 days post burst) with=20 1-m and 2-m unit LCO telescopes in Siding Springs in the SDSS gri=20 filters. We detect the optical afterglow (D'Avanzo et al.; Bolmer GCN=20 22479; Lipunov et al. GCN 22481; Melandri et al. GCN 22482; Sbarufatti=20 et al. GCN 22484) with the following magnitudes:
Mid time since GRB=A0=A0=A0=A0 Exp=A0=A0=A0=A0=A0=A0=A0 Filter=A0=A0=A0=A0= =A0=A0=A0=A0 Magnitude (days)=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 (s) ------------------------------------------------------------- 0.39=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 5x120=A0=A0=A0= =A0=A0 SDSS-R=A0=A0=A0=A0=A0=A0=A0=A0 21.5 +- 0.15 0.40=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 5x120=A0=A0=A0= =A0=A0 SDSS-I=A0=A0=A0=A0=A0=A0=A0=A0 21.4 +- 0.2 -------------------------------------------------------------
as calibrated against nearby Pan-STARRS stars.
GCN Circular #22488
Klotz A., Noysena K., Atteia J.L. (CNRS-OMP-IRAP), Boer M., Eymar L. (CNRS-ARTEMIS), Gendre B. (UVI - Etelman Obs.) report:
We imaged the field of GRB 180314A detected by SWIFT (trigger 814129) with the TAROT robotic telescope (D=25cm) located at the European Southern Observatory, La Silla observatory, Chile.
The observations started 172.7s after the GRB trigger (83.1s after the notice). The elevation of the field decreased from 77 degrees above horizon and weather conditions were good.
We detected the candidate couterpart mentioned by D'Avanzo et al. (GCNC 22478), Bolmer (GCNC 22479), Lipunov et al. (GCNC 22481), Melandri et al. (GCNC 22482) Sbarufatti et al. (GCNC 22484), Guidorzi et al. (GCNC 22487). TAROT photometry is:
```
t1(h) t2(h) r(AB) 1sig
0.048 0.056 15.64 0.05
0.059 0.067 16.00 0.05
0.070 0.079 16.34 0.05
0.081 0.090 16.64 0.06
0.093 0.101 16.92 0.07
0.104 0.129 17.26 0.10
0.132 0.182 17.68 0.13
0.227 0.276 18.18 0.19
0.282 0.332 18.32 0.24
0.343 0.443 18.62 0.30
```
It shows clearly a decay -1.8 until 8 minutes after the trigger and then a decay -0.92 later. So we suspect a strong reverse shock during the 8 first minutes.
Magnitudes were estimated with the nearby NOMAD1 stars and are not corrected for galactic dust extinction.
GCN Circular #22490
T. N. Ukwatta (LANL), S. D. Barthelmy (GSFC), J. R. Cummings (CPI), P. D'Avanzo (INAF-OAB), H. A. Krimm (NSF/USRA), A. Y. Lien (GSFC/UMBC), C. B. Markwardt (GSFC), D. M. Palmer (LANL), T. Sakamoto (AGU), M. Stamatikos (OSU), (i.e. the Swift-BAT team):
Using the data set from T-239 to T+963 sec from the recent telemetry downlink, we report further analysis of BAT GRB 180314A (trigger #814129) (D'Avanzo et al., GCN Circ. 22478). The BAT ground-calculated position is RA, Dec = 99.208, -24.530 deg which is
```
  RA(J2000)  =  06h 36m 50.0s
  Dec(J2000) = -24d 31' 47.7"
```
with an uncertainty of 3.1 arcmin, (radius, sys+stat, 90% containment). The partial coding was 24%.
The mask-weighted light curve shows a few overlapping pulses that starts at ~ T-12 s and ends at ~T+110 s. The main peak occurs at ~T+4 s. Note that the burst location came in to the BAT FOV at ~T-32 s, and thus the burst emission might start before it is in the BAT FOV. T90 (15-350 keV) is 51.2 +- 22.3 sec (estimated error including systematics).
The time-averaged spectrum from T-11.80 to T+109.75 sec is best fit by a power law with an exponential cutoff. This fit gives a photon index 0.83 +- 0.25, and Epeak of 94.9 +- 17.8 keV (chi squared 47.72 for 56 d.o.f.). For this model the total fluence in the 15-150 keV band is 1.1 +- 0.04 x 10^-5 erg/cm2 and the 1-sec peak flux measured from T+3.05 sec in the 15-150 keV band is 7.9 +- 0.6 ph/cm2/sec. A fit to a simple power law gives a photon index of 1.50 +- 0.05 (chi squared 72.57 for 57 d.o.f.). All the quoted errors are at the 90% confidence level.
The results of the batgrbproduct analysis are available at http://gcn.gsfc.nasa.gov/notices_s/814129/BA/
GCN Circular #22505
K. Shiraishi, R. Itoh, K. L. Murata, T. Yoshii, Y. Tachibana, S. Harita, K. Morita, T. Ozawa, H. Mamiya, Y. Yatsu, and N. Kawai (Tokyo Tech) report on behalf of the MITSuME collaboration:
We searched for the optical counterpart of GRB 180314A (P. D'Avanzo et al., GCN Circular #22478) with the optical three color (g', Rc, and Ic) CCD cameras attached to the MITSuME 50 cm telescope of Okayama Astrophysical Observatory, Japan.
The observation started on 10:32:06 UT. We did not find any new point source within enhanced XRT circle (J.P. Osborne et al., GCN Circular #22480) in all three bands. We obtained following limits for the magnitudes.
```
T0+[hour]    MID-UT      T-EXP[sec]    g'       Rc        Ic
------------------------------------------------------------
9.99       12:03:20      7240     >19.3     >18.8     >18.6
------------------------------------------------------------

T0+ : Elapsed time after the burst
T-EXP: Total Exposure time
```
We used GSC2.3 catalog for flux calibration.
GCN Circular #22506
K. Shiraishi, R. Itoh, K. L. Murata, T. Yoshii, Y. Tachibana, S. Harita, K. Morita, T. Ozawa, H. Mamiya, Y. Yatsu, and N. Kawai (Tokyo Tech) report on behalf of the MITSuME collaboration:
We searched for the optical counterpart of GRB 180314A (P. D'Avanzo et al., GCN Circular #22478) with the optical three color (g', Rc, and Ic) CCD cameras attached to the MITSuME 50 cm telescope of Akeno Observatory, Yamanashi, Japan.
The observation started on 09:18:50 UT. We did not find any new point source within enhanced XRT circle (J.P. Osborne et al., GCN Circular #22480) in all three bands. We obtained following limits for the magnitudes.
```
T0+[hour]    MID-UT      T-EXP[sec]    g'       Rc        Ic
------------------------------------------------------------
9.2       10:56:31      6280     >19.4     >19.3     >18.5
------------------------------------------------------------

T0+ : Elapsed time after the burst
T-EXP: Total Exposure time
```
We used GSC2.3 catalog for flux calibration.
GCN Circular #22513
A. Tsvetkova, S. Golenetskii, R.Aptekar, D. Frederiks, P. Oleynik, M. Ulanov, D. Svinkin, A. Lysenko, A. Kozlova and T. Cline on behalf of the Konus-Wind team, report:
The long-duration GRB 180314A (Swift-BAT detection: D'Avanzo=A0 et al., GCN 22478; Ukwatta et al., GCN 22490; Fermi GBM observation: Bissaldi & Roberts, GCN 22485) triggered Konus-Wind at T0=3D2601.957 s UT (00:43:21.957).
The burst light curve shows a single emission episode with a total duration of ~22 s. The emission is seen up to ~1.5 MeV.
As observed by Konus-Wind, the burst had a fluence of 1.47(-0.06,+0.06)x10^-5 erg/cm2, and a 64-ms peak energy flux, measured from T0+0.490 s, of 2.61(-1.05,+1.21)x10^-6 erg/cm2/s (both in the 20 keV - 10 MeV energy range).
The time-integrated spectrum of the burst (measured from T0 to T0+33.024 s) is best fit in the 20 keV - 1.5 MeV range by a power law with exponential cutoff model: dN/dE ~ (E^alpha)*exp(-E*(2+alpha)/Ep) with=A0 alpha =3D -0.61(-0.16,+0.17), and Ep =3D 111(-6,+6) keV (chi2 =3D 45/60 dof). Fitting by the GRB (Band) model yields the same alpha and Ep, and an upper limit on the high energy photon index: beta < -3.08 (chi2 =3D 45/59 dof).
The spectrum near the peak count rate (measured from T0 to T0+0.256 s) is best fit in the 20 keV - 1.5 MeV range by a power law with exponential cutoff model with=A0 alpha =3D -0.34(-0.57,+0.84), and Ep =3D 303(-89,+161) keV (chi2 =3D 14/15 dof). Fitting by the GRB (Band) model yields the same alpha and Ep, and an upper limit on the high energy photon index: beta < -2.26 (chi2 =3D 14/14 dof).
Assuming the redshift z=1.445 (Sbarufatti et al., GCN 22484) and a standard cosmology model with H_0 = 70 km/s/Mpc, Omega_M = 0.27, and Omega_Lambda = 0.73, we estimate the following rest-frame parameters: the isotropic energy release E_iso is 8.18(-0.34,+0.36)x10^52 erg, the peak luminosity L_iso is 3.55(-1.42,+1.64)x10^52 erg/s, and the rest-frame peak energy of the time-integrated spectrum, Ep,i, is 272(-14,+15) keV.
The Konus-Wind light curve of this GRB is available at http://www.ioffe.ru/LEA/GRBs/GRB180314_T02601/
All the quoted errors are at the 90% confidence level. All the quoted values are preliminary.
GCN Circular #22515
V. Sharma and D. Bhattacharya (IUCAA), V. Bhalerao (IIT-B), A. R. Rao (TIFR) and S. Vadawale (PRL) report on behalf of the AstroSat CZTI collaboration:
Analysis of AstroSat CZTI data showed the detection of a bright GRB 180314A, which was also detected by Swift (D'Avanzo P. et al., GCN 22478) and Fermi-GBM (Bissaldi E. et al., GCN 22485).
The source was clearly detected in the 40-200 keV energy range. The light curve shows multiple peaks of emission with strongest peak at 00:43:20.5 UT. The measured peak count rate is 339.5 cts/s above the background in combined data of four quadrants, with a total of 5127 cts. The local mean background count rate was 586.5 cts/s. Using cumulative rates, we measure a T90 of 37.3 s.
It was also clearly detected in the CsI anticoincidence (Veto) detector in the 100-500 keV energy range.
CZTI GRB detections are reported regularly on the payload site at http://astrosat.iucaa.in/czti/?q=grb. CZTI is built by a TIFR-led consortium of institutes across India, including VSSC, ISAC, IUCAA, SAC and PRL. The Indian Space Research Organisation funded, managed and facilitated the project.

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Jochen Greiner, last update: 17-Mar-2018 [Disclaimer]