Gamma-ray Burst 180623A

(All information courtesy of the instrument teams.)

Previous IAU Circulars

none

Results of Observations

GCN/BACODINE POSITION NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 23 Jun 18 16:42:15 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     844015,   Seg_Num: 0
GRB_RA:          214.511d {+14h 18m 03s} (J2000),
                 214.851d {+14h 19m 24s} (current),
                 213.599d {+14h 14m 24s} (1950)
GRB_DEC:         -60.294d {-60d 17' 38"} (J2000),
                 -60.379d {-60d 22' 43"} (current),
                 -60.064d {-60d 03' 48"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       4222 [cnts]    Image_Peak=190 [image_cnts]
TRIGGER_DUR:     1.024 [sec] 
TRIGGER_INDEX:   155     E_range: 50-350 keV
BKG_INTEN:       23136 [cnts]
BKG_TIME:        60098.84 SOD {16:41:38.84} UT
BKG_DUR:         8 [sec]
GRB_DATE:        18292 TJD;   174 DOY;   18/06/23
GRB_TIME:        60116.38 SOD {16:41:56.38} UT
GRB_PHI:         -74.81 [deg]
GRB_THETA:        23.46 [deg]
SOLN_STATUS:     0x3
RATE_SIGNIF:     21.67 [sigma]
IMAGE_SIGNIF:    7.68 [sigma]
MERIT_PARAMS:     +1  +0  +0  +0  +3  -2  +0  +1 +58  +0 
SUN_POSTN:        92.37d {+06h 09m 28s}  +23.42d {+23d 25' 06"}
SUN_DIST:        126.09 [deg]   Sun_angle= -8.2 [hr] (East of Sun)
MOON_POSTN:      220.59d {+14h 42m 23s}  -10.29d {-10d 17' 21"}
MOON_DIST:        50.27 [deg]
MOON_ILLUM:      82 [%]
GAL_COORDS:      313.47,  0.79 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      235.90,-43.25 [deg] ecliptic lon,lat of the burst (or transient)
COMMENTS:        SWIFT-BAT GRB Coordinates.  
COMMENTS:        This is a rate 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 = 104.08,-10.59 [deg].

GCN NOTICE

TITLE:          GCN/INTEGRAL NOTICE
NOTICE_DATE:    Sat 23 Jun 18 16:42:36 UT
NOTICE_TYPE:    INTEGRAL SPI ACS Trigger
TRIGGER_NUM:    8081,   Sub_Num: 0
GRB_INTEN:      9.20 [sigma]   
GRB_TIME:       60113.53 SOD {16:41:53.53} UT
GRB_DATE:       18292 TJD;   174 DOY;   18/06/23
COMMENTS:       INTEGRAL SPI_ACS GRB Trigger.
COMMENTS:       Time_Scale=2.0000 and Time_Error=1.0000.
COMMENTS:
COMMENTS:       NOTE: This SPIACS event is temporally(3.0<100sec) coincident with the SWIFT_BAT event (trignum=844015).
COMMENTS:
COMMENTS:       The SPIACS lightcurve can be found at:
COMMENTS:       ftp://isdcarc.unige.ch/arc/FTP/ibas/spiacs/2018-06/2018-06-23T16-41-53.3470-19754-19344-0.lc

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 23 Jun 18 16:43:38 UT
NOTICE_TYPE:     Swift-XRT Position
TRIGGER_NUM:     844015,   Seg_Num: 0
GRB_RA:          214.5327d {+14h 18m 07.84s} (J2000),
                 214.8721d {+14h 19m 29.29s} (current),
                 213.6205d {+14h 14m 28.92s} (1950)
GRB_DEC:         -60.2525d {-60d 15' 08.9"} (J2000),
                 -60.3371d {-60d 20' 13.4"} (current),
                 -60.0219d {-60d 01' 18.8"} (1950)
GRB_ERROR:       4.7 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       1.31e-08 [erg/cm2/sec]
GRB_SIGNIF:      15.13 [sigma]
IMG_START_DATE:  18292 TJD;   174 DOY;   18/06/23
IMG_START_TIME:  60193.34 SOD {16:43:13.34} UT,   77.0 [sec] since BAT Trigger Time
TAM[0-3]:        327.66 237.22 261.61 243.56
AMPLIFIER:       2
WAVEFORM:        134
SUN_POSTN:        92.37d {+06h 09m 29s}  +23.42d {+23d 25' 06"}
SUN_DIST:        126.11 [deg]   Sun_angle= -8.2 [hr] (East of Sun)
MOON_POSTN:      220.61d {+14h 42m 25s}  -10.29d {-10d 17' 34"}
MOON_DIST:        50.23 [deg]
MOON_ILLUM:      82 [%]
GAL_COORDS:      313.49,  0.83 [deg] galactic lon,lat of the burst
ECL_COORDS:      235.89,-43.21 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Coordinates.  
COMMENTS:        The XRT position is 2.58 arcmin from the BAT position.  
COMMENTS:        The object found at this position is either a very bright burst or a cosmic ray hit.  
COMMENTS:        Examine the XRT Image to differentiate (CRs are much more compact); see examples at:  
COMMENTS:        http://www.swift.psu.edu/xrt/XRT_Postage_Stamp_Image_Photo_Gallery.htm .

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 23 Jun 18 16:43:50 UT
NOTICE_TYPE:     Swift-XRT Processed Image
TRIGGER_NUM:     844015,   Seg_Num: 0
GRB_RA:          214.5327d {+14h 18m 07.8s} (J2000),
                 214.8721d {+14h 19m 29.2s} (current),
                 213.6205d {+14h 14m 28.9s} (1950)
GRB_DEC:         -60.2525d {-60d 15' 08.9"} (J2000),
                 -60.3371d {-60d 20' 13.4"} (current),
                 -60.0219d {-60d 01' 18.8"} (1950)
GRB_ERROR:       4.7 [arcsec, radius, statistical plus systematic]
GRB_INTEN:       229 [cnts]
IMG_START_DATE:  18292 TJD;   174 DOY;   18/06/23
IMG_START_TIME:  60193.34 SOD {16:43:13.34} UT,   77.0 [sec] since BAT Trigger Time
CENTROID_X:      292.49,  raw= 292  [pixels]
CENTROID_Y:      252.71,  raw= 253  [pixels]
ROLL:            253.65 [deg]
GAIN:            8
MODE:            3, Long Image mode
WAVEFORM:        134
EXPO_TIME:       2.50 [sec]
GRB_POS_XRT_Y:   -107.68
GRB_POS_XRT_Z:   -32.78
IMAGE_URL:       sw00844015000msxps_rw.img
SUN_POSTN:        92.37d {+06h 09m 29s}  +23.42d {+23d 25' 06"}
SUN_DIST:        126.11 [deg]   Sun_angle= -8.2 [hr] (East of Sun)
MOON_POSTN:      220.61d {+14h 42m 26s}  -10.29d {-10d 17' 36"}
MOON_DIST:        50.23 [deg]
MOON_ILLUM:      82 [%]
GAL_COORDS:      313.49,  0.83 [deg] galactic lon,lat of the burst
ECL_COORDS:      235.89,-43.21 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Processed Image.  
COMMENTS:        The object found at this position is either a very bright burst or a cosmic ray hit.  
COMMENTS:        Examine the XRT Image to differentiate (CRs are much more compact); see examples at:  
COMMENTS:        http://www.swift.psu.edu/xrt/XRT_Postage_Stamp_Image_Photo_Gallery.htm .

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 23 Jun 18 16:43:48 UT
NOTICE_TYPE:     Swift-XRT Image
TRIGGER_NUM:     844015,   Seg_Num: 0
GRB_RA:          214.5327d {+14h 18m 07.8s} (J2000),
                 214.8721d {+14h 19m 29.2s} (current),
                 213.6205d {+14h 14m 28.9s} (1950)
GRB_DEC:         -60.2525d {-60d 15' 08.9"} (J2000),
                 -60.3371d {-60d 20' 13.4"} (current),
                 -60.0219d {-60d 01' 18.8"} (1950)
GRB_ERROR:       4.7 [arcsec, radius, statistical plus systematic]
GRB_INTEN:       229 [cnts]
IMG_START_DATE:  18292 TJD;   174 DOY;   18/06/23
IMG_START_TIME:  60193.34 SOD {16:43:13.34} UT,   77.0 [sec] since BAT Trigger Time
CENTROID_X:      292.49,  raw= 292  [pixels]
CENTROID_Y:      252.71,  raw= 253  [pixels]
ROLL:            253.65 [deg]
GAIN:            8
MODE:            3, Long Image mode
WAVEFORM:        134
EXPO_TIME:       2.50 [sec]
GRB_POS_XRT_Y:   -107.68
GRB_POS_XRT_Z:   -32.78
IMAGE_URL:       sw00844015000msxps_rw.img
SUN_POSTN:        92.37d {+06h 09m 29s}  +23.42d {+23d 25' 06"}
SUN_DIST:        126.11 [deg]   Sun_angle= -8.2 [hr] (East of Sun)
MOON_POSTN:      220.61d {+14h 42m 26s}  -10.29d {-10d 17' 36"}
MOON_DIST:        50.23 [deg]
MOON_ILLUM:      82 [%]
GAL_COORDS:      313.49,  0.83 [deg] galactic lon,lat of the burst
ECL_COORDS:      235.89,-43.21 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Image.  
COMMENTS:        The object found at this position is either a very bright burst or a cosmic ray hit.  
COMMENTS:        Examine the XRT Image to differentiate (CRs are much more compact); see examples at:  
COMMENTS:        http://www.swift.psu.edu/xrt/XRT_Postage_Stamp_Image_Photo_Gallery.htm .

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 23 Jun 18 16:46:22 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     844015,   Seg_Num: 0
POINT_RA:        214.566d {+14h 18m 16s} (J2000)
POINT_DEC:       -60.279d {-60d 16' 42"} (J2000)
POINT_ROLL:      253.648d
IMG_START_DATE:  18292 TJD;   174 DOY;   18/06/23
IMG_START_TIME:  60202.06 SOD {16:43:22.06} UT,   85.7 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        3.580
N_STARS:         190
X_OFFSET:        656 [pixels]
Y_OFFSET:        400 [pixels]
X_MAX:           1615 [pixels]
Y_MAX:           1359 [pixels]
DET_THRESH:      16
PHOTO_THRESH:    9
SL_URL:          sw00844015000msufc0085.fits
SUN_POSTN:        92.37d {+06h 09m 29s}  +23.42d {+23d 25' 06"}
SUN_DIST:        126.12 [deg]   Sun_angle= -8.2 [hr] (East of Sun)
MOON_POSTN:      220.63d {+14h 42m 31s}  -10.30d {-10d 18' 01"}
MOON_DIST:        50.24 [deg]
MOON_ILLUM:      82 [%]
GAL_COORDS:      313.50,  0.80 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      235.92,-43.23 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 23 Jun 18 16:46:38 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     844015,   Seg_Num: 0
POINT_RA:        214.566d {+14h 18m 16s} (J2000)
POINT_DEC:       -60.279d {-60d 16' 42"} (J2000)
POINT_ROLL:      253.648d
IMG_START_DATE:  18292 TJD;   174 DOY;   18/06/23
IMG_START_TIME:  60202.06 SOD {16:43:22.06} UT,   85.7 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        3.580
N_STARS:         190
X_OFFSET:        656 [pixels]
Y_OFFSET:        400 [pixels]
X_MAX:           1615 [pixels]
Y_MAX:           1359 [pixels]
DET_THRESH:      16
PHOTO_THRESH:    9
SL_URL:          sw00844015000msufc0085.fits
SUN_POSTN:        92.37d {+06h 09m 29s}  +23.42d {+23d 25' 06"}
SUN_DIST:        126.12 [deg]   Sun_angle= -8.2 [hr] (East of Sun)
MOON_POSTN:      220.63d {+14h 42m 31s}  -10.30d {-10d 18' 04"}
MOON_DIST:        50.24 [deg]
MOON_ILLUM:      82 [%]
GAL_COORDS:      313.50,  0.80 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      235.92,-43.23 [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:     Sat 23 Jun 18 16:47:44 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     844015,   Seg_Num: 0
GRB_RA:          214.511d {+14h 18m 03s} (J2000),
                 214.851d {+14h 19m 24s} (current),
                 213.599d {+14h 14m 24s} (1950)
GRB_DEC:         -60.294d {-60d 17' 38"} (J2000),
                 -60.379d {-60d 22' 43"} (current),
                 -60.064d {-60d 03' 48"} (1950)
GRB_DATE:        18292 TJD;   174 DOY;   18/06/23
GRB_TIME:        60116.38 SOD {16:41:56.38} UT
TRIGGER_INDEX:   155
GRB_PHI:         -74.81 [deg]
GRB_THETA:        23.46 [deg]
DELTA_TIME:      6.00 [sec]
TRIGGER_DUR:     1.024 [sec] 
SOLN_STATUS:     0x3
RATE_SIGNIF:     21.67 [sigma]
IMAGE_SIGNIF:    7.68 [sigma]
LC_URL:          sw00844015000msb.lc
SUN_POSTN:        92.37d {+06h 09m 29s}  +23.42d {+23d 25' 06"}
SUN_DIST:        126.09 [deg]   Sun_angle= -8.2 [hr] (East of Sun)
MOON_POSTN:      220.64d {+14h 42m 34s}  -10.30d {-10d 18' 14"}
MOON_DIST:        50.26 [deg]
MOON_ILLUM:      82 [%]
GAL_COORDS:      313.47,  0.79 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      235.90,-43.25 [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 a rate 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 = 104.08,-10.59 [deg].

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 23 Jun 18 16:48:10 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     844015,   Seg_Num: 0
POINT_RA:        214.566d {+14h 18m 16s} (J2000)
POINT_DEC:       -60.279d {-60d 16' 42"} (J2000)
ROLL:            253.648d
IMG_START_DATE:  18292 TJD;   174 DOY;   18/06/23
IMG_START_TIME:  60202.06 SOD {16:43:22.06} UT,   85.7 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     551465023
X_OFFSET:        969 [pixels]
Y_OFFSET:        1026 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1129
Y_GRB_POS:       1186
BINNING_INDEX:   1
IM_URL:          sw00844015000msuni0107.fits
SUN_POSTN:        92.37d {+06h 09m 30s}  +23.42d {+23d 25' 06"}
SUN_DIST:        126.12 [deg]   Sun_angle= -8.2 [hr] (East of Sun)
MOON_POSTN:      220.64d {+14h 42m 35s}  -10.31d {-10d 18' 19"}
MOON_DIST:        50.24 [deg]
MOON_ILLUM:      82 [%]
GAL_COORDS:      313.50,  0.80 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      235.92,-43.23 [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:     Sat 23 Jun 18 16:48:28 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     844015,   Seg_Num: 0
POINT_RA:        214.566d {+14h 18m 16s} (J2000)
POINT_DEC:       -60.279d {-60d 16' 42"} (J2000)
ROLL:            253.648d
IMG_START_DATE:  18292 TJD;   174 DOY;   18/06/23
IMG_START_TIME:  60202.06 SOD {16:43:22.06} UT,   85.7 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     551465023
X_OFFSET:        969 [pixels]
Y_OFFSET:        1026 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1129
Y_GRB_POS:       1186
BINNING_INDEX:   1
IM_URL:          sw00844015000msuni0107.fits
SUN_POSTN:        92.37d {+06h 09m 30s}  +23.42d {+23d 25' 06"}
SUN_DIST:        126.12 [deg]   Sun_angle= -8.2 [hr] (East of Sun)
MOON_POSTN:      220.65d {+14h 42m 35s}  -10.31d {-10d 18' 22"}
MOON_DIST:        50.24 [deg]
MOON_ILLUM:      82 [%]
GAL_COORDS:      313.50,  0.80 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      235.92,-43.23 [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:     Sat 23 Jun 18 16:55:16 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     844015,   Seg_Num: 0
POINT_RA:        214.571d {+14h 18m 17s} (J2000)
POINT_DEC:       -60.278d {-60d 16' 39"} (J2000)
POINT_ROLL:      253.643d
IMG_START_DATE:  18292 TJD;   174 DOY;   18/06/23
IMG_START_TIME:  60415.43 SOD {16:46:55.43} UT,   299.1 [sec] since BAT Trigger Time
FILTER:          7, U
BKG_MEAN:        1.193
N_STARS:         190
X_OFFSET:        649 [pixels]
Y_OFFSET:        706 [pixels]
X_MAX:           1608 [pixels]
Y_MAX:           1665 [pixels]
DET_THRESH:      9
PHOTO_THRESH:    4
SL_URL:          sw00844015000msufc0299.fits
SUN_POSTN:        92.38d {+06h 09m 31s}  +23.42d {+23d 25' 06"}
SUN_DIST:        126.12 [deg]   Sun_angle= -8.2 [hr] (East of Sun)
MOON_POSTN:      220.70d {+14h 42m 49s}  -10.32d {-10d 19' 28"}
MOON_DIST:        50.22 [deg]
MOON_ILLUM:      82 [%]
GAL_COORDS:      313.50,  0.80 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      235.93,-43.23 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 23 Jun 18 16:55:35 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     844015,   Seg_Num: 0
POINT_RA:        214.571d {+14h 18m 17s} (J2000)
POINT_DEC:       -60.278d {-60d 16' 39"} (J2000)
POINT_ROLL:      253.643d
IMG_START_DATE:  18292 TJD;   174 DOY;   18/06/23
IMG_START_TIME:  60415.43 SOD {16:46:55.43} UT,   299.1 [sec] since BAT Trigger Time
FILTER:          7, U
BKG_MEAN:        1.193
N_STARS:         190
X_OFFSET:        649 [pixels]
Y_OFFSET:        706 [pixels]
X_MAX:           1608 [pixels]
Y_MAX:           1665 [pixels]
DET_THRESH:      9
PHOTO_THRESH:    4
SL_URL:          sw00844015000msufc0299.fits
SUN_POSTN:        92.38d {+06h 09m 31s}  +23.42d {+23d 25' 06"}
SUN_DIST:        126.12 [deg]   Sun_angle= -8.2 [hr] (East of Sun)
MOON_POSTN:      220.71d {+14h 42m 49s}  -10.33d {-10d 19' 31"}
MOON_DIST:        50.22 [deg]
MOON_ILLUM:      82 [%]
GAL_COORDS:      313.50,  0.80 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      235.93,-43.23 [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:     Sat 23 Jun 18 16:56:42 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     844015,   Seg_Num: 0
POINT_RA:        214.571d {+14h 18m 17s} (J2000)
POINT_DEC:       -60.278d {-60d 16' 39"} (J2000)
ROLL:            253.643d
IMG_START_DATE:  18292 TJD;   174 DOY;   18/06/23
IMG_START_TIME:  60415.43 SOD {16:46:55.43} UT,   299.1 [sec] since BAT Trigger Time
FILTER:          7, U
EXPOSURE_ID:     551465236
X_OFFSET:        969 [pixels]
Y_OFFSET:        1026 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1129
Y_GRB_POS:       1186
BINNING_INDEX:   1
IM_URL:          sw00844015000msuni0321.fits
SUN_POSTN:        92.38d {+06h 09m 31s}  +23.42d {+23d 25' 06"}
SUN_DIST:        126.12 [deg]   Sun_angle= -8.2 [hr] (East of Sun)
MOON_POSTN:      220.72d {+14h 42m 52s}  -10.33d {-10d 19' 42"}
MOON_DIST:        50.22 [deg]
MOON_ILLUM:      82 [%]
GAL_COORDS:      313.50,  0.80 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      235.93,-43.23 [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:     Sat 23 Jun 18 16:56:56 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     844015,   Seg_Num: 0
POINT_RA:        214.571d {+14h 18m 17s} (J2000)
POINT_DEC:       -60.278d {-60d 16' 39"} (J2000)
ROLL:            253.643d
IMG_START_DATE:  18292 TJD;   174 DOY;   18/06/23
IMG_START_TIME:  60415.43 SOD {16:46:55.43} UT,   299.1 [sec] since BAT Trigger Time
FILTER:          7, U
EXPOSURE_ID:     551465236
X_OFFSET:        969 [pixels]
Y_OFFSET:        1026 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1129
Y_GRB_POS:       1186
BINNING_INDEX:   1
IM_URL:          sw00844015000msuni0321.fits
SUN_POSTN:        92.38d {+06h 09m 31s}  +23.42d {+23d 25' 06"}
SUN_DIST:        126.12 [deg]   Sun_angle= -8.2 [hr] (East of Sun)
MOON_POSTN:      220.72d {+14h 42m 52s}  -10.33d {-10d 19' 44"}
MOON_DIST:        50.22 [deg]
MOON_ILLUM:      82 [%]
GAL_COORDS:      313.50,  0.80 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      235.93,-43.23 [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:     Sat 23 Jun 18 16:55:45 UT
NOTICE_TYPE:     Swift-XRT Position UPDATE
TRIGGER_NUM:     844015,   Seg_Num: 0
GRB_RA:          214.5295d {+14h 18m 07.08s} (J2000),
                 214.8689d {+14h 19m 28.52s} (current),
                 213.6173d {+14h 14m 28.15s} (1950)
GRB_DEC:         -60.2539d {-60d 15' 14.0"} (J2000),
                 -60.3385d {-60d 20' 18.4"} (current),
                 -60.0233d {-60d 01' 23.8"} (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:  18292 TJD;   174 DOY;   18/06/23
IMG_START_TIME:  60308.00 SOD {16:45:08.00} UT,   191.6 [sec] since BAT Trigger Time
TAM[0-3]:        100.00 100.00 100.00 100.00
AMPLIFIER:       1
WAVEFORM:        31
SUN_POSTN:        92.38d {+06h 09m 31s}  +23.42d {+23d 25' 06"}
SUN_DIST:        126.11 [deg]   Sun_angle= -8.2 [hr] (East of Sun)
MOON_POSTN:      220.71d {+14h 42m 50s}  -10.33d {-10d 19' 33"}
MOON_DIST:        50.20 [deg]
MOON_ILLUM:      82 [%]
GAL_COORDS:      313.49,  0.83 [deg] galactic lon,lat of the burst
ECL_COORDS:      235.89,-43.21 [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 Circular #22828
K. L. Page (U Leicester), S. D. Barthelmy (GSFC), D. N. Burrows (PSU), A. Deich (PSU), S. W. K Emery (UCL-MSSL), J.D. Gropp (PSU), F. E. Marshall (NASA/GSFC) and D. M. Palmer (LANL) report on behalf of the Neil Gehrels Swift Observatory Team:
At 16:41:56 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 180623A (trigger=844015). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 214.511, -60.294, which is
```
   RA(J2000)  =  14h 18m 03s
   Dec(J2000) = -60d 17' 38"
```
with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve shows 4 large peaks and many little peaks with a total duration of about 90 sec. The peak count rate was ~6500 counts/sec (15-350 keV), at ~61 sec after the trigger.
The XRT began observing the field at 16:43:13.3 UT, 76.9 seconds after the BAT trigger. Using promptly downlinked data we find a bright, uncatalogued X-ray source with an enhanced position: RA, Dec 214.5295, -60.2539 which is equivalent to:
```
   RA(J2000)  = 14h 18m 07.08s
   Dec(J2000) = -60d 15' 13.9"
```
with an uncertainty of 2.1 arcseconds (radius, 90% containment). This location is 148 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.
A power-law fit to a spectrum formed from promptly downlinked event data does not constrain the column density.
The initial flux in the 2.5 s image was 1.31e-08 erg cm^-2 s^-1 (0.2-10 keV).
UVOT took a finding chart exposure of nominal 150.000 seconds with the White filter starting 85 seconds after the BAT trigger. No credible afterglow candidate has been found in the initial data products. The 2.7'x2.7' sub-image covers 100% of the XRT error circle. The 8'x8' region for the list of sources generated on-board covers 100% of the XRT error circle. The typical 3-sigma upper limit has been about 19.6 mag. The list of sources is typically complete to about 18 mag. No correction has been made for the large, but uncertain, extinction expected.
Although this source is close to the Galactic plane (lat = 0.83 degrees), its distance from the Galactic center (46 degrees), the presence of significant flux above 100 keV, and the complexity and overall shape of the lightcurve are consistent with a GRB that is aligned with the plane due to random coincidence.
Burst Advocate for this burst is K. L. Page (klp5 AT leicester.ac.uk). 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:     Sat 23 Jun 18 17:02:19 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     844015,   Seg_Num: 0
POINT_RA:        214.571d {+14h 18m 17s} (J2000)
POINT_DEC:       -60.278d {-60d 16' 39"} (J2000)
POINT_ROLL:      253.643d
IMG_START_DATE:  18292 TJD;   174 DOY;   18/06/23
IMG_START_TIME:  60994.28 SOD {16:56:34.28} UT,   877.9 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        2.827
N_STARS:         190
X_OFFSET:        409 [pixels]
Y_OFFSET:        466 [pixels]
X_MAX:           1848 [pixels]
Y_MAX:           1905 [pixels]
DET_THRESH:      14
PHOTO_THRESH:    7
SL_URL:          sw00844015000msufc0877.fits
SUN_POSTN:        92.38d {+06h 09m 32s}  +23.42d {+23d 25' 06"}
SUN_DIST:        126.12 [deg]   Sun_angle= -8.2 [hr] (East of Sun)
MOON_POSTN:      220.76d {+14h 43m 03s}  -10.34d {-10d 20' 36"}
MOON_DIST:        50.21 [deg]
MOON_ILLUM:      82 [%]
GAL_COORDS:      313.50,  0.80 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      235.93,-43.23 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 23 Jun 18 17:02:31 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     844015,   Seg_Num: 0
POINT_RA:        214.571d {+14h 18m 17s} (J2000)
POINT_DEC:       -60.278d {-60d 16' 39"} (J2000)
POINT_ROLL:      253.643d
IMG_START_DATE:  18292 TJD;   174 DOY;   18/06/23
IMG_START_TIME:  60994.28 SOD {16:56:34.28} UT,   877.9 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        2.827
N_STARS:         190
X_OFFSET:        409 [pixels]
Y_OFFSET:        466 [pixels]
X_MAX:           1848 [pixels]
Y_MAX:           1905 [pixels]
DET_THRESH:      14
PHOTO_THRESH:    7
SL_URL:          sw00844015000msufc0877.fits
SUN_POSTN:        92.38d {+06h 09m 32s}  +23.42d {+23d 25' 06"}
SUN_DIST:        126.12 [deg]   Sun_angle= -8.2 [hr] (East of Sun)
MOON_POSTN:      220.76d {+14h 43m 03s}  -10.34d {-10d 20' 38"}
MOON_DIST:        50.21 [deg]
MOON_ILLUM:      82 [%]
GAL_COORDS:      313.50,  0.80 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      235.93,-43.23 [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:     Sat 23 Jun 18 17:04:01 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     844015,   Seg_Num: 0
POINT_RA:        214.571d {+14h 18m 17s} (J2000)
POINT_DEC:       -60.278d {-60d 16' 39"} (J2000)
ROLL:            253.643d
IMG_START_DATE:  18292 TJD;   174 DOY;   18/06/23
IMG_START_TIME:  60994.28 SOD {16:56:34.28} UT,   877.9 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     551465815
X_OFFSET:        968 [pixels]
Y_OFFSET:        1025 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1128
Y_GRB_POS:       1185
BINNING_INDEX:   1
IM_URL:          sw00844015000msuni0899.fits
SUN_POSTN:        92.38d {+06h 09m 32s}  +23.42d {+23d 25' 05"}
SUN_DIST:        126.12 [deg]   Sun_angle= -8.2 [hr] (East of Sun)
MOON_POSTN:      220.78d {+14h 43m 06s}  -10.35d {-10d 20' 53"}
MOON_DIST:        50.20 [deg]
MOON_ILLUM:      82 [%]
GAL_COORDS:      313.50,  0.80 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      235.93,-43.23 [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:     Sat 23 Jun 18 17:04:11 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     844015,   Seg_Num: 0
POINT_RA:        214.571d {+14h 18m 17s} (J2000)
POINT_DEC:       -60.278d {-60d 16' 39"} (J2000)
ROLL:            253.643d
IMG_START_DATE:  18292 TJD;   174 DOY;   18/06/23
IMG_START_TIME:  60994.28 SOD {16:56:34.28} UT,   877.9 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     551465815
X_OFFSET:        968 [pixels]
Y_OFFSET:        1025 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1128
Y_GRB_POS:       1185
BINNING_INDEX:   1
IM_URL:          sw00844015000msuni0899.fits
SUN_POSTN:        92.38d {+06h 09m 32s}  +23.42d {+23d 25' 05"}
SUN_DIST:        126.12 [deg]   Sun_angle= -8.2 [hr] (East of Sun)
MOON_POSTN:      220.78d {+14h 43m 07s}  -10.35d {-10d 20' 55"}
MOON_DIST:        50.20 [deg]
MOON_ILLUM:      82 [%]
GAL_COORDS:      313.50,  0.80 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      235.93,-43.23 [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 #22829
P.A. Evans, M.R. Goad, J.P. Osborne and A.P. Beardmore (U. Leicester) report on behalf of the Swift-XRT team.
Using 3088 s of XRT Photon Counting mode data and 6 UVOT images for GRB 180623A, 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 = 214.52879, -60.25352 which is equivalent to:
```
RA (J2000): 14h 18m 6.91s
Dec (J2000): -60d 15' 12.7"
```
with an uncertainty of 1.5 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 #22830
J.A. Kennea (PSU), B. Sbarufatti (INAF-OAB/PSU), D.N. Burrows (PSU), J.P. Osborne (U. Leicester), A.P. Beardmore (U. Leicester), P. D'Avanzo (INAF-OAB), V. D'Elia (ASDC), A. D'Ai (INAF-IASFPA) and K.L. Page report on behalf of the Swift-XRT team:
We have analysed 7.7 ks of XRT data for GRB 180623A (Page et al. GCN Circ. 22828), from 83 s to 18.2 ks after the BAT trigger. The data comprise 90 s in Windowed Timing (WT) mode with the remainder in Photon Counting (PC) mode. The enhanced XRT position for this burst was given by Evans et al. (GCN Circ. 22829).
The late-time light curve (from T0+4.5 ks) can be modelled with a power-law decay with a decay index of alpha=1.72 (+/-0.14).
A spectrum formed from the WT mode data can be fitted with an absorbed power-law with a photon spectral index of 1.73 (+0.20, -0.19). The best-fitting absorption column is 6.4 (+/-0.7) x 10^22 cm^-2, in excess of the Galactic value of 1.5 x 10^22 cm^-2 (Willingale et al. 2013). The PC mode spectrum has a photon index of 2.04 (+0.27, -0.25) and a best-fitting absorption column of 6.6 (+/-0.9) x 10^22 cm^-2. The counts to observed (unabsorbed) 0.3-10 keV flux conversion factor deduced from this spectrum is 9.0 x 10^-11 (2.9 x 10^-10) erg cm^-2 count^-1.
A summary of the PC-mode spectrum is thus:
```
Total column:	     6.6 (+/-0.9) x 10^22 cm^-2
Galactic foreground: 1.5 x 10^22 cm^-2
Excess significance: 9.9 sigma
Photon index:	     2.04 (+0.27, -0.25)
```
If the light curve continues to decay with a power-law decay index of 1.72, the count rate at T+24 hours will be 2.3 x 10^-3 count s^-1, corresponding to an observed (unabsorbed) 0.3-10 keV flux of 2.0 x 10^-13 (6.5 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/00844015.
This circular is an official product of the Swift-XRT team.
GCN Circular #22831
N. P. M. Kuin (UCL-MSSL) and K. L. Page (U. Leicester) report on behalf of the Swift/UVOT team:
The Swift/UVOT began settled observations of the field of GRB 180623A 86 s after the BAT trigger (Page et al., GCN Circ. 22828). A source consistent with the XRT position (Evans et al. GCN Circ. 22829) is detected in the initial UVOT exposures.
The UVOT refined position is ra, deg = 214.5288,-60.2541 deg which is
```
RA = 14:18:06.9
Dec = -60:15:14.8
```
with an estimated uncertainty of 1".
Preliminary detections and 3-sigma upper limits 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               86          236          150        >20.68
white              878          997          119         20.04 +/- 0.24
v                  629         6296          432        >19.2
b                18042        18207          162         19.86 +/- 0.28
u                  299        17732         2252        >21.6
w1                 678        16819         1318        >20.8
m2                 653         6501          432        >20.0
w2                 604         6092          432        >20.0
```
The magnitudes in the table are not corrected for the Galactic extinction due to the reddening of E(B-V) = 7.04 in the direction of the burst (Schlegel et al. 1998).
GCN Circular #22833
S. D. Barthelmy (GSFC), J. R. Cummings (CPI), H. A. Krimm (NSF/USRA), A. Y. Lien (GSFC/UMBC), C. B. Markwardt (GSFC), K. L. Page (U Leicester), D. M. Palmer (LANL), T. Sakamoto (AGU), M. Stamatikos (OSU), T. N. Ukwatta (LANL) (i.e. the Swift-BAT team):
Using the data set from T-240 to T+963 sec from the recent telemetry downlink, we report further analysis of BAT GRB 180623A (trigger #844015) (Page et al., GCN Circ. 22828). The BAT ground-calculated position is RA, Dec = 214.528, -60.268 deg which is
```
  RA(J2000)  =  14h 18m 06.8s
  Dec(J2000) = -60d 16' 05.6"
```
with an uncertainty of 1.0 arcmin, (radius, sys+stat, 90% containment). The partial coding was 63%.
The mask-weighted light curve shows a multi-peaked structure that starts at ~T-60 s and ends at ~T+115 s. The three main peaks occur at ~T0, ~T+25 s, and ~T+60 s, respectively. T90 (15-350 keV) is 114.9 +- 6.8 sec (estimated error including systematics). Note that the burst entered the BAT FOV around ~ T-90 s. Therefore, there might be additional burst emission beforehand.
The time-averaged spectrum from T-61.8 to T+114.1 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 1.45 +- 0.04. The fluence in the 15-150 keV band is 1.2 +- 0.02 x 10^-5 erg/cm2. The 1-sec peak photon flux measured from T+59.11 sec in the 15-150 keV band is 5.6 +- 0.2 ph/cm2/sec. 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/844015/BA/
GCN Circular #22834
N. P. M. Kuin (UCL-MSSL) and K. L. Page (U. Leicester) report on behalf of the Swift/UVOT team:
The Source reported in our previous GCN Circ. No 22831 is in fact a source present in the DSS survey. The extinction of this bursts is very high, so there is no afterglow seen. Our apologies for this error.
GCN Circular #22856
A. Kozlova, S. Golenetskii, R. Aptekar, D. Frederiks, M. Ulanov, D. Svinkin, A. Tsvetkova, A. Lysenko, and T. Cline on behalf of the Konus-Wind team, report:
The long-duration GRB 180623A (Swift detection: Page et al., GCN Circ. 22828; Swift-BAT refined analysis: Barthelmy et al., GCN Circ. 22833) triggered Konus-Wind at T0=60141.775 s UT (16:42:21.775).
The burst light curve shows a multipeaked structure started at ~T0-69 s with a total duration of ~114 s. The emission is seen up to ~2 MeV.
As observed by Konus-Wind, the burst had a fluence of 3.15(-0.24,+0.28)x10^-5 erg/cm2, and a 64-ms peak flux, measured from T0+2.208 s, of 2.94(-0.98,+1.01)x10^-6 erg/cm2/s (both in the 20 keV - 10 MeV energy range).
The time-averaged spectrum of the burst (measured from T0 to T0+49.408 s) is best fit in the 20 keV - 4 MeV range by a power law with exponential cutoff model: dN/dE ~ (E^alpha)*exp(-E*(2+alpha)/Ep) with alpha = -1.03(-0.16,+0.17) and Ep = 233(-33,+48) keV (chi2 = 63/70 dof). Fitting by a GRB (Band) model yields the same alpha and Ep, and an upper limit on the high energy photon index: beta < -2.1 (chi2 = 61/69 dof).
The spectrum near the maximum count rate (measured from T0+0.256 to T0+8.448 s) is best fit in the 20 keV - 4 MeV range by a power law with exponential cutoff model with alpha = -0.78(-0.17,+0.19) and Ep = 390(-63,+91) keV (chi2 = 59/70 dof). Fitting by a GRB (Band) model yields the same alpha and Ep, and an upper limit on the high energy photon index: beta < -2.3 (chi2 = 59/69 dof).
The Konus-Wind light curve of this GRB is available at http://www.ioffe.ru/LEA/GRBs/GRB180623_T60141/
All the quoted errors are at the 90% confidence level. All the quoted values are preliminary.

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Jochen Greiner, last update: 26-Jun-2018 [Disclaimer]