Gamma-ray Burst 141022A

(All information courtesy of the instrument teams.)

Previous IAU Circulars

none

Results of Observations

GCN/BACODINE POSITION NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 22 Oct 14 01:28:42 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     616061,   Seg_Num: 0
GRB_RA:          241.901d {+16h 07m 36s} (J2000),
                 242.317d {+16h 09m 16s} (current),
                 240.507d {+16h 02m 02s} (1950)
GRB_DEC:         -72.129d {-72d 07' 44"} (J2000),
                 -72.168d {-72d 10' 03"} (current),
                 -71.995d {-71d 59' 41"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       28359 [cnts]    Image_Peak=431 [image_cnts]
TRIGGER_DUR:     8.192 [sec] 
TRIGGER_INDEX:   338     E_range: 25-100 keV
BKG_INTEN:       203418 [cnts]
BKG_TIME:        5171.31 SOD {01:26:11.31} UT
BKG_DUR:         64 [sec]
GRB_DATE:        16952 TJD;   295 DOY;   14/10/22
GRB_TIME:        5262.77 SOD {01:27:42.77} UT
GRB_PHI:         -174.52 [deg]
GRB_THETA:        45.22 [deg]
SOLN_STATUS:     0x20000003
RATE_SIGNIF:     14.03 [sigma]
IMAGE_SIGNIF:    7.94 [sigma]
MERIT_PARAMS:     +1  +0  +0  +3  +2  -2  +0  +0 -42  +0 
SUN_POSTN:       206.55d {+13h 46m 11s}  -10.96d {-10d 57' 52"}
SUN_DIST:         64.85 [deg]   Sun_angle= -2.4 [hr] (East of Sun)
MOON_POSTN:      186.26d {+12h 25m 03s}   -4.02d {-04d 01' 21"}
MOON_DIST:        76.27 [deg]
MOON_ILLUM:      3 [%]
GAL_COORDS:      316.80,-14.77 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      257.02,-49.95 [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 = 158.27,9.25 [deg].  
COMMENTS:           
COMMENTS:        NOTE: This BAT event is temporally(6.0<100sec) coincident with the FERMI_GBM event (trignum=435634071).

red DSS finding chart ps-file

GCN NOTICE

TITLE:           GCN/FERMI NOTICE
NOTICE_DATE:     Wed 22 Oct 14 01:28:13 UT
NOTICE_TYPE:     Fermi-GBM Flight Position
RECORD_NUM:      45
TRIGGER_NUM:     435634071
GRB_RA:          207.400d {+13h 49m 36s} (J2000),
                 207.738d {+13h 50m 57s} (current),
                 206.277d {+13h 45m 07s} (1950)
GRB_DEC:         -75.517d {-75d 31' 00"} (J2000),
                 -75.590d {-75d 35' 22"} (current),
                 -75.268d {-75d 16' 05"} (1950)
GRB_ERROR:       21.95 [deg radius, statistical plus systematic]
GRB_INTEN:       49 [cnts/sec]
DATA_SIGNIF:     5.00 [sigma]
INTEG_TIME:      4.096 [sec]
GRB_DATE:        16952 TJD;   295 DOY;   14/10/22
GRB_TIME:        5268.52 SOD {01:27:48.52} UT
GRB_PHI:         255.00 [deg]
GRB_THETA:        50.00 [deg]
DATA_TIME_SCALE: 4.0960 [sec]
HARD_RATIO:      0.87
LOC_ALGORITHM:   3 (version number of)
MOST_LIKELY:      97%  GRB
2nd_MOST_LIKELY:   1%  Generic Transient
DETECTORS:       0,0,0, 1,1,0, 1,1,0, 0,0,0, 0,0,
SUN_POSTN:       206.55d {+13h 46m 11s}  -10.96d {-10d 57' 51"}
SUN_DIST:         64.63 [deg]   Sun_angle= -0.1 [hr] (East of Sun)
MOON_POSTN:      186.26d {+12h 25m 02s}   -4.02d {-04d 01' 16"}
MOON_DIST:        72.61 [deg]
MOON_ILLUM:      3 [%]
GAL_COORDS:      306.63,-13.06 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      245.65,-57.41 [deg] ecliptic lon,lat of the burst (or transient)
LC_URL:          http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2014/bn141022061/quicklook/glg_lc_medres34_bn141022061.gif
COMMENTS:        Fermi-GBM Flight-calculated Coordinates.  
COMMENTS:        This trigger occurred at longitude,latitude = 109.57,20.08 [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 22 Oct 14 01:28:43 UT
NOTICE_TYPE:     Fermi-GBM Ground Position
RECORD_NUM:      56
TRIGGER_NUM:     435634071
GRB_RA:          204.860d {+13h 39m 26s} (J2000),
                 205.190d {+13h 40m 46s} (current),
                 203.765d {+13h 35m 04s} (1950)
GRB_DEC:         -75.970d {-75d 58' 11"} (J2000),
                 -76.045d {-76d 02' 40"} (current),
                 -75.716d {-75d 42' 58"} (1950)
GRB_ERROR:       7.89 [deg radius, statistical only]
DATA_SIGNIF:     5.10 [sigma]
DATA_INTERVAL:   4.096 [sec]
GRB_DATE:        16952 TJD;   295 DOY;   14/10/22
GRB_TIME:        5268.52 SOD {01:27:48.52} UT
GRB_PHI:         254.00 [deg]
GRB_THETA:        50.00 [deg]
E_RANGE:         44.032 - 279.965 [keV]
LOC_ALGORITHM:   4143 (Gnd S/W Version number)
SUN_POSTN:       206.55d {+13h 46m 11s}  -10.96d {-10d 57' 52"}
SUN_DIST:         65.08 [deg]   Sun_angle= 0.1 [hr] (West of Sun)
MOON_POSTN:      186.26d {+12h 25m 03s}   -4.02d {-04d 01' 21"}
MOON_DIST:        72.80 [deg]
MOON_ILLUM:      3 [%]
GAL_COORDS:      305.90,-13.38 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      245.35,-58.17 [deg] ecliptic lon,lat of the burst (or transient)
LC_URL:          http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2014/bn141022061/quicklook/glg_lc_medres34_bn141022061.gif
COMMENTS:        Fermi-GBM Ground-calculated Coordinates.  
COMMENTS:        In the LAT Field-of-view.  
COMMENTS:        This Notice was ground-generated -- not flight-generated.  
COMMENTS:        The LC_URL file will not be created until ~15 min after the trigger.  
COMMENTS:           
COMMENTS:        NOTE: This GBM event is temporally(6.0<100sec) coincident with the SWIFT_BAT event (trignum=616061).

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 22 Oct 14 01:30:06 UT
NOTICE_TYPE:     Swift-XRT Nack-Position
TRIGGER_NUM:     616061,   Seg_Num: 0
POINT_RA:        241.940d {+16h 07m 46s} (J2000)
POINT_DEC:       -72.137d {-72d 08' 11"} (J2000)
IMG_START_DATE:  16952 TJD;   295 DOY;   14/10/22
IMG_START_TIME:  5397.63 SOD {01:29:57.63} UT,   134.9 [sec] since BAT Trigger Time
COUNTS:          1    Min_needed= 20
STD_DEV:         0.00   Max_StdDev_for_Good=28.44 [arcsec]
PH2_ITER:        0    Max_iter_allowed= 4
ERROR_CODE:      1
COMMENTS:        SWIFT-XRT Nack Position.  
COMMENTS:        No source found in the image.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 22 Oct 14 01:31:40 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     616061,   Seg_Num: 0
GRB_RA:          241.901d {+16h 07m 36s} (J2000),
                 242.317d {+16h 09m 16s} (current),
                 240.507d {+16h 02m 02s} (1950)
GRB_DEC:         -72.129d {-72d 07' 44"} (J2000),
                 -72.168d {-72d 10' 03"} (current),
                 -71.995d {-71d 59' 41"} (1950)
GRB_DATE:        16952 TJD;   295 DOY;   14/10/22
GRB_TIME:        5262.77 SOD {01:27:42.77} UT
TRIGGER_INDEX:   338
GRB_PHI:         -174.52 [deg]
GRB_THETA:        45.22 [deg]
DELTA_TIME:      -24.00 [sec]
TRIGGER_DUR:     8.192 [sec] 
SOLN_STATUS:     0x3
RATE_SIGNIF:     14.03 [sigma]
IMAGE_SIGNIF:    7.94 [sigma]
LC_URL:          sw00616061000msb.lc
SUN_POSTN:       206.55d {+13h 46m 12s}  -10.97d {-10d 57' 54"}
SUN_DIST:         64.85 [deg]   Sun_angle= -2.4 [hr] (East of Sun)
MOON_POSTN:      186.29d {+12h 25m 08s}   -4.03d {-04d 01' 49"}
MOON_DIST:        76.26 [deg]
MOON_ILLUM:      3 [%]
GAL_COORDS:      316.80,-14.77 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      257.02,-49.95 [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 = 158.27,9.25 [deg].

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 22 Oct 14 01:34:08 UT
NOTICE_TYPE:     Swift-XRT Position
TRIGGER_NUM:     616061,   Seg_Num: 0
GRB_RA:          241.8724d {+16h 07m 29.37s} (J2000),
                 242.2882d {+16h 09m 09.15s} (current),
                 240.4787d {+16h 01m 54.88s} (1950)
GRB_DEC:         -72.1237d {-72d 07' 25.3"} (J2000),
                 -72.1623d {-72d 09' 44.2"} (current),
                 -71.9895d {-71d 59' 22.0"} (1950)
GRB_ERROR:       5.1 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       1.00e-10 [erg/cm2/sec]
GRB_SIGNIF:      10.00 [sigma]
IMG_START_DATE:  16952 TJD;   295 DOY;   14/10/22
IMG_START_TIME:  5414.00 SOD {01:30:14.00} UT,   151.2 [sec] since BAT Trigger Time
TAM[0-3]:        100.00 100.00 100.00 100.00
AMPLIFIER:       1
WAVEFORM:        31
SUN_POSTN:       206.55d {+13h 46m 12s}  -10.97d {-10d 57' 56"}
SUN_DIST:         64.84 [deg]   Sun_angle= -2.4 [hr] (East of Sun)
MOON_POSTN:      186.31d {+12h 25m 13s}   -4.04d {-04d 02' 13"}
MOON_DIST:        76.23 [deg]
MOON_ILLUM:      3 [%]
GAL_COORDS:      316.80,-14.76 [deg] galactic lon,lat of the burst
ECL_COORDS:      257.00,-49.95 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Coordinates.  
COMMENTS:        This Notice was ground-generated -- not flight-generated.  
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:        The probability that this is a serendipitous source in the  
COMMENTS:        SPER window is 0.58% < P(seren) < 1.1%.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 22 Oct 14 01:35:36 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     616061,   Seg_Num: 0
POINT_RA:        241.940d {+16h 07m 46s} (J2000)
POINT_DEC:       -72.135d {-72d 08' 07"} (J2000)
POINT_ROLL:      321.063d
IMG_START_DATE:  16952 TJD;   295 DOY;   14/10/22
IMG_START_TIME:  5398.59 SOD {01:29:58.59} UT,   135.8 [sec] since BAT Trigger Time
FILTER:          7, U
BKG_MEAN:        3.312
N_STARS:         190
X_OFFSET:        290 [pixels]
Y_OFFSET:        231 [pixels]
X_MAX:           1729 [pixels]
Y_MAX:           1670 [pixels]
DET_THRESH:      15
PHOTO_THRESH:    8
SL_URL:          sw00616061000msufc0135.fits
SUN_POSTN:       206.55d {+13h 46m 12s}  -10.97d {-10d 57' 58"}
SUN_DIST:         64.86 [deg]   Sun_angle= -2.4 [hr] (East of Sun)
MOON_POSTN:      186.32d {+12h 25m 16s}   -4.04d {-04d 02' 27"}
MOON_DIST:        76.25 [deg]
MOON_ILLUM:      3 [%]
GAL_COORDS:      316.80,-14.78 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      257.04,-49.96 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 22 Oct 14 01:36:09 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     616061,   Seg_Num: 0
POINT_RA:        241.940d {+16h 07m 46s} (J2000)
POINT_DEC:       -72.135d {-72d 08' 07"} (J2000)
POINT_ROLL:      321.063d
IMG_START_DATE:  16952 TJD;   295 DOY;   14/10/22
IMG_START_TIME:  5398.59 SOD {01:29:58.59} UT,   135.8 [sec] since BAT Trigger Time
FILTER:          7, U
BKG_MEAN:        3.312
N_STARS:         190
X_OFFSET:        290 [pixels]
Y_OFFSET:        231 [pixels]
X_MAX:           1729 [pixels]
Y_MAX:           1670 [pixels]
DET_THRESH:      15
PHOTO_THRESH:    8
SL_URL:          sw00616061000msufc0135.fits
SUN_POSTN:       206.55d {+13h 46m 12s}  -10.97d {-10d 57' 58"}
SUN_DIST:         64.86 [deg]   Sun_angle= -2.4 [hr] (East of Sun)
MOON_POSTN:      186.32d {+12h 25m 17s}   -4.04d {-04d 02' 32"}
MOON_DIST:        76.25 [deg]
MOON_ILLUM:      3 [%]
GAL_COORDS:      316.80,-14.78 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      257.04,-49.96 [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 22 Oct 14 01:37:09 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     616061,   Seg_Num: 0
POINT_RA:        241.940d {+16h 07m 46s} (J2000)
POINT_DEC:       -72.135d {-72d 08' 07"} (J2000)
ROLL:            321.063d
IMG_START_DATE:  16952 TJD;   295 DOY;   14/10/22
IMG_START_TIME:  5398.59 SOD {01:29:58.59} UT,   135.8 [sec] since BAT Trigger Time
FILTER:          7, U
EXPOSURE_ID:     435634211
X_OFFSET:        849 [pixels]
Y_OFFSET:        790 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1009
Y_GRB_POS:       950
BINNING_INDEX:   1
IM_URL:          sw00616061000msuni0148.fits
SUN_POSTN:       206.55d {+13h 46m 12s}  -10.97d {-10d 58' 00"}
SUN_DIST:         64.86 [deg]   Sun_angle= -2.4 [hr] (East of Sun)
MOON_POSTN:      186.33d {+12h 25m 19s}   -4.05d {-04d 02' 42"}
MOON_DIST:        76.24 [deg]
MOON_ILLUM:      3 [%]
GAL_COORDS:      316.80,-14.78 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      257.04,-49.96 [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 22 Oct 14 01:37:21 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     616061,   Seg_Num: 0
POINT_RA:        241.940d {+16h 07m 46s} (J2000)
POINT_DEC:       -72.135d {-72d 08' 07"} (J2000)
ROLL:            321.063d
IMG_START_DATE:  16952 TJD;   295 DOY;   14/10/22
IMG_START_TIME:  5398.59 SOD {01:29:58.59} UT,   135.8 [sec] since BAT Trigger Time
FILTER:          7, U
EXPOSURE_ID:     435634211
X_OFFSET:        849 [pixels]
Y_OFFSET:        790 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1009
Y_GRB_POS:       950
BINNING_INDEX:   1
IM_URL:          sw00616061000msuni0148.fits
SUN_POSTN:       206.55d {+13h 46m 12s}  -10.97d {-10d 58' 00"}
SUN_DIST:         64.86 [deg]   Sun_angle= -2.4 [hr] (East of Sun)
MOON_POSTN:      186.33d {+12h 25m 20s}   -4.05d {-04d 02' 44"}
MOON_DIST:        76.24 [deg]
MOON_ILLUM:      3 [%]
GAL_COORDS:      316.80,-14.78 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      257.04,-49.96 [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 NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 22 Oct 14 01:45:13 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     616061,   Seg_Num: 0
POINT_RA:        241.943d {+16h 07m 46s} (J2000)
POINT_DEC:       -72.135d {-72d 08' 04"} (J2000)
POINT_ROLL:      321.060d
IMG_START_DATE:  16952 TJD;   295 DOY;   14/10/22
IMG_START_TIME:  6135.87 SOD {01:42:15.87} UT,   873.1 [sec] since BAT Trigger Time
FILTER:          7, U
BKG_MEAN:        1.129
N_STARS:         190
X_OFFSET:        290 [pixels]
Y_OFFSET:        231 [pixels]
X_MAX:           1729 [pixels]
Y_MAX:           1670 [pixels]
DET_THRESH:      9
PHOTO_THRESH:    4
SL_URL:          sw00616061000msufc0873.fits
SUN_POSTN:       206.56d {+13h 46m 14s}  -10.97d {-10d 58' 06"}
SUN_DIST:         64.86 [deg]   Sun_angle= -2.4 [hr] (East of Sun)
MOON_POSTN:      186.40d {+12h 25m 35s}   -4.07d {-04d 04' 00"}
MOON_DIST:        76.21 [deg]
MOON_ILLUM:      3 [%]
GAL_COORDS:      316.80,-14.78 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      257.04,-49.96 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 22 Oct 14 01:45:41 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     616061,   Seg_Num: 0
POINT_RA:        241.943d {+16h 07m 46s} (J2000)
POINT_DEC:       -72.135d {-72d 08' 04"} (J2000)
POINT_ROLL:      321.060d
IMG_START_DATE:  16952 TJD;   295 DOY;   14/10/22
IMG_START_TIME:  6135.87 SOD {01:42:15.87} UT,   873.1 [sec] since BAT Trigger Time
FILTER:          7, U
BKG_MEAN:        1.129
N_STARS:         190
X_OFFSET:        290 [pixels]
Y_OFFSET:        231 [pixels]
X_MAX:           1729 [pixels]
Y_MAX:           1670 [pixels]
DET_THRESH:      9
PHOTO_THRESH:    4
SL_URL:          sw00616061000msufc0873.fits
SUN_POSTN:       206.56d {+13h 46m 14s}  -10.97d {-10d 58' 07"}
SUN_DIST:         64.86 [deg]   Sun_angle= -2.4 [hr] (East of Sun)
MOON_POSTN:      186.40d {+12h 25m 36s}   -4.07d {-04d 04' 04"}
MOON_DIST:        76.20 [deg]
MOON_ILLUM:      3 [%]
GAL_COORDS:      316.80,-14.78 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      257.04,-49.96 [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 22 Oct 14 01:46:14 UT
NOTICE_TYPE:     Swift-XRT Position UPDATE
TRIGGER_NUM:     616061,   Seg_Num: 0
GRB_RA:          241.8697d {+16h 07m 28.72s} (J2000),
                 242.2855d {+16h 09m 08.51s} (current),
                 240.4759d {+16h 01m 54.22s} (1950)
GRB_DEC:         -72.1253d {-72d 07' 31.0"} (J2000),
                 -72.1639d {-72d 09' 50.0"} (current),
                 -71.9910d {-71d 59' 27.7"} (1950)
GRB_ERROR:       2.2 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       1.00e-10 [erg/cm2/sec]
GRB_SIGNIF:      10.00 [sigma]
IMG_START_DATE:  16952 TJD;   295 DOY;   14/10/22
IMG_START_TIME:  5414.00 SOD {01:30:14.00} UT,   151.2 [sec] since BAT Trigger Time
TAM[0-3]:        100.00 100.00 100.00 100.00
AMPLIFIER:       1
WAVEFORM:        31
SUN_POSTN:       206.56d {+13h 46m 14s}  -10.97d {-10d 58' 07"}
SUN_DIST:         64.83 [deg]   Sun_angle= -2.4 [hr] (East of Sun)
MOON_POSTN:      186.40d {+12h 25m 37s}   -4.07d {-04d 04' 10"}
MOON_DIST:        76.18 [deg]
MOON_ILLUM:      3 [%]
GAL_COORDS:      316.79,-14.76 [deg] galactic lon,lat of the burst
ECL_COORDS:      257.00,-49.95 [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 0.58% < P(seren) < 1.1%.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 22 Oct 14 01:46:52 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     616061,   Seg_Num: 0
POINT_RA:        241.943d {+16h 07m 46s} (J2000)
POINT_DEC:       -72.135d {-72d 08' 04"} (J2000)
ROLL:            321.060d
IMG_START_DATE:  16952 TJD;   295 DOY;   14/10/22
IMG_START_TIME:  6135.87 SOD {01:42:15.87} UT,   873.1 [sec] since BAT Trigger Time
FILTER:          7, U
EXPOSURE_ID:     435634948
X_OFFSET:        849 [pixels]
Y_OFFSET:        790 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1009
Y_GRB_POS:       950
BINNING_INDEX:   1
IM_URL:          sw00616061000msuni0886.fits
SUN_POSTN:       206.56d {+13h 46m 14s}  -10.97d {-10d 58' 08"}
SUN_DIST:         64.86 [deg]   Sun_angle= -2.4 [hr] (East of Sun)
MOON_POSTN:      186.41d {+12h 25m 38s}   -4.07d {-04d 04' 16"}
MOON_DIST:        76.20 [deg]
MOON_ILLUM:      3 [%]
GAL_COORDS:      316.80,-14.78 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      257.04,-49.96 [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 22 Oct 14 01:47:12 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     616061,   Seg_Num: 0
POINT_RA:        241.943d {+16h 07m 46s} (J2000)
POINT_DEC:       -72.135d {-72d 08' 04"} (J2000)
ROLL:            321.060d
IMG_START_DATE:  16952 TJD;   295 DOY;   14/10/22
IMG_START_TIME:  6135.87 SOD {01:42:15.87} UT,   873.1 [sec] since BAT Trigger Time
FILTER:          7, U
EXPOSURE_ID:     435634948
X_OFFSET:        849 [pixels]
Y_OFFSET:        790 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1009
Y_GRB_POS:       950
BINNING_INDEX:   1
IM_URL:          sw00616061000msuni0886.fits
SUN_POSTN:       206.56d {+13h 46m 14s}  -10.97d {-10d 58' 08"}
SUN_DIST:         64.86 [deg]   Sun_angle= -2.4 [hr] (East of Sun)
MOON_POSTN:      186.41d {+12h 25m 39s}   -4.07d {-04d 04' 19"}
MOON_DIST:        76.20 [deg]
MOON_ILLUM:      3 [%]
GAL_COORDS:      316.80,-14.78 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      257.04,-49.96 [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 #16938
A. Vargas (PSU), S. D. Barthelmy (GSFC), W. H. Baumgartner (GSFC/UMBC), J. A. Kennea (PSU), V. Mangano (PSU), D. M. Palmer (LANL), B. Sbarufatti (INAF-OAB/PSU) and T. N. Ukwatta (LANL) report on behalf of the Swift Team:
At 01:27:42 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 141022A (trigger=616061). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 241.901, -72.129 which is
```
   RA(J2000) = 16h 07m 36s
   Dec(J2000) = -72d 07' 44"
```
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 30 sec. The peak count rate was ~1000 counts/sec (15-350 keV), at ~8 sec after the trigger.
The XRT began observing the field at 01:29:57.6 UT, 134.9 seconds after the BAT trigger. Using promptly downlinked data we find an uncatalogued X-ray source with an enhanced position: RA, Dec 241.8698, -72.1255 which is equivalent to:
```
   RA(J2000)  = 16h 07m 28.75s
   Dec(J2000) = -72d 07' 31.7"
```
with an uncertainty of 2.2 arcseconds (radius, 90% containment). This location is 36 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 in excess of the Galactic value (1.04 x 10^21 cm^-2, Willingale et al. 2013), with an excess column of 7.9 (+6.17/-4.49) x 10^21 cm^-2 (90% confidence).
UVOT took a finding chart exposure of 250 seconds with the U filter starting 135 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 typical 3-sigma upper limit has been about 19.2 mag. The 8'x8' region for the list of sources generated on-board covers 100% of the XRT error circle. Because of the density of catalogued stars, further analysis is required to report an upper limit for any afterglow in the region. No correction has been made for the expected extinction corresponding to E(B-V) of 0.10.
Burst Advocate for this burst is A. Vargas (avargas AT swift.psu.edu). 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 Circular #16939
D.A. Kann (TLS Tautenburg), T. Schweyer, J. F. Graham, J. Greiner (all MPE Garching) report on behalf of the GROND team:
We observed the field of GRB 141022A (Swift trigger 616061; Vargas et al., GCN #16938) 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 01:39 UT on October 22nd, approximately 20 min after the GRB trigger. They were performed on a setting target at high airmass (~2.7) until reaching the pointing limit.
Despite a crowed field we find only a single object in the 2.2" Swift-XRT enhanced error circle reported by Vargas et al., GCN #16938) at
```
RA (J2000.0) = 16h 07m 28.82s
DEC (J2000.0) = -72d 07' 29.6"  
```
(error of 0".5) but cannot ascertain variability in images centered 875 sec and 2095 sec after the trigger, and note the possibility of a chance coincidence given the density of objects in the field. We intended subsequent observations to determine variability.
Based on a 16.5 min sequence of exposures, we estimate preliminary magnitudes and limits (all in AB system) of:
```
g' = 23.6 +/- 0.2 mag
r' = 22.2 +/- 0.1 mag
i' = 21.6 +/- 0.1 mag
z' = 22.0 +/- 0.2 mag
J > 20.9 mag
H > 20.3 mag
K > 19.8 mag
```
Given magnitudes are calibrated against GROND zeropoints and 2MASS field stars and are not corrected for the expected Galactic foreground extinction corresponding to a reddening of E_(B-V)=0.1 mag in the direction of the burst (Schlegel et al. 1998).
GCN Circular #16941
P. D'Avanzo (INAF-OAB), V. D'Elia (ASDC), M. de Pasquale (INAF-IASFPA), M.C. Stroh (PSU), D.N. Burrows (PSU), J.A. Kennea (PSU), A.P. Beardmore (U. Leicester), P.A. Evans (U. Leicester), B.P. Gompertz (U. Leicester) and A. Vargas report on behalf of the Swift-XRT team:
We have analysed 10 ks of XRT data for GRB 141022A (Vargas et al. GCN Circ. 16938), from 144 s to 25.5 ks after the BAT trigger. The data are entirely in Photon Counting (PC) mode. The best available XRT position (using the promptly downlinked event data, the XRT-UVOT alignment and matching UVOT field sources to the USNO-B1 catalogue) is RA, Dec = 241.8696, -72.1254 which is equivalent to:
```
RA (J2000): 16 07 28.70
Dec(J2000): -72 07 31.4
```
with an uncertainty of 2.1 arcsec (radius, 90% confidence).
The light curve can be modelled with a power-law decay with a decay index of alpha=1.21 (+/-0.08).
A spectrum formed from the PC mode data can be fitted with an absorbed power-law with a photon spectral index of 2.5 (+0.5, -0.4). The best-fitting absorption column is 1.1 (+0.5, -0.4) x 10^22 cm^-2, in excess of the Galactic value of 1.0 x 10^21 cm^-2 (Willingale et al. 2013). The counts to observed (unabsorbed) 0.3-10 keV flux conversion factor deduced from this spectrum is 3.9 x 10^-11 (1.2 x 10^-10) erg cm^-2 count^-1.
A summary of the PC-mode spectrum is thus:
```
Total column:	     1.1 (+0.5, -0.4) x 10^22 cm^-2
Galactic foreground: 1.0 x 10^21 cm^-2
Excess significance: 4.5 sigma
Photon index:	     2.5 (+0.5, -0.4)
```
If the light curve continues to decay with a power-law decay index of 1.21, the count rate at T+24 hours will be 2.7 x 10^-4 count s^-1, corresponding to an observed (unabsorbed) 0.3-10 keV flux of 1.0 x 10^-14 (3.3 x 10^-14) erg cm^-2 s^-1.
The results of the XRT-team automatic analysis are available at http://www.swift.ac.uk/xrt_products/00616061.
This circular is an official product of the Swift-XRT team.
GCN Circular #16942
T. Sakamoto (AGU), S. D. Barthelmy (GSFC), W. H. Baumgartner (GSFC/UMBC), J. R. Cummings (GSFC/UMBC), N. Gehrels (GSFC), H. A. Krimm (GSFC/USRA), A. Y. Lien (GSFC/UMBC), C. B. Markwardt (GSFC), D. M. Palmer (LANL), M. Stamatikos (OSU), J. Tueller (GSFC), T. N. Ukwatta (LANL), A. Vargas (PSU) (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 141022A (trigger #616061) (Vargas, et al., GCN Circ. 16938). The BAT ground-calculated position is RA, Dec = 241.930, -72.152 deg which is
```
   RA(J2000)  =  16h 07m 43.1s
   Dec(J2000) = -72d 09' 06.7"
```
with an uncertainty of 2.2 arcmin, (radius, sys+stat, 90% containment). The partial coding was 39%.
The mask-weighted light curve shows a weak episode starting at ~T-1.0 sec, and ending around T+10 sec. The burst location came into the BAT FOV around ~T-140 sec. T90 (15-350 keV) is 8.72 +- 1.56 sec (estimated error including systematics).
The time-averaged spectrum from T-0.38 to T+9.17 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 1.31 +- 0.27. The fluence in the 15-150 keV band is 4.8 +- 0.7 x 10^-07 erg/cm2. The 1-sec peak photon flux measured from T+6.20 sec in the 15-150 keV band is 0.9 +- 0.3 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/616061/BA/
GCN Circular #16944
M. H. Siegel (PSU) and A. Vargas (PSU) report on behalf of the Swift/UVOT team:
The Swift/UVOT began settled observations of the field of GRB 141022A 136 s after the BAT trigger (Vargas et al., GCN Circ. 16938). No optical afterglow consistent with the optical position (Kann et al. GCN Circ. 16939) is detected in the initial UVOT exposures. Preliminary 3-sigma upper limits using the UVOT photometric system (Breeveld et al. 2011, AIP Conf. Proc. 1358, 373) for the first finding chart (FC) exposure and subsequent exposures are:
```
Filter         T_start(s)   T_stop(s)      Exp(s)         Mag

u (fc)             136          386          246         >20.2
v                  443         1997          194         >19.9
b                  392         1946          214         >20.6
u                  136         1921          568         >20.7
uvw1               493         1895          175         >20.7
uvm2               468         2011          185         >20.5
uvw2               418         1973          194         >20.5
```
The magnitudes in the table are not corrected for the Galactic extinction due to the reddening of E(B-V) = 0.10 in the direction of the burst (Schlegel et al. 1998).
GCN Circular #16946
Matthew Stanbro (UAH) reports on behalf of the Fermi GBM Team:
"At 01:27:48.52 UT on 22 October 2014, the Fermi Gamma-Ray Burst Monitor triggered and located GRB 141022A (trigger 141022061 / 141022061) which was also detected by Swift BAT (Vargas et al. 2014, GCN 16938). The GBM on-ground location, using the Fermi GBM trigger data, is consistent with Swift's location.
The GBM light curve shows a long burst, consisting of one main episode, with a total duration (T90) of about 11.5 s (50-300 keV). The time-averaged spectrum from T0-6.1 s to T0+6.1 s is well fit by a power law function with an exponential high-energy cutoff. The power law index is -0.8 +/- 0.3 and the cutoff energy, parameterized as Epeak, is 231.5 +/- 71.1 keV.
The event fluence (10-1000 keV) in this time interval is (1.2 +/- 0.2)E-06 erg/cm^2. The 1.024-sec peak photon flux measured starting from T0-5.696 s in the 10-1000 keV band is 1.1 +/- 0.2 ph/s/cm^2.
The spectral analysis results presented above are preliminary; final results will be published in the GBM GRB Catalog."
GCN Circular #17023
A. Trotter, J. Haislip, D. Reichart, A. Aji, R. Beauchemin, T. Berger, A. Dow, A. Foster, N. Frank, M. Hinckle, K. Ivarsen, A. LaCluyze, M. Maples, J. Moore, M. Nysewander, C. Salemi, L. Zbinden, and J. A. Crain report:
Skynet observed the Swift BAT/XRT localization of GRB 141022A (Vargas et al., GCN 16938, Swift trigger=616061) with one 24" telescope (PROMPT 8; I band) and two 16" telescopes (PROMPT 1,5; V,I bands) of the PROMPT array at CTIO, Chile. Starting at 2014-10-22 01:29:40 UT and continuing until 02:50 UT (t=2m-83m post-trigger), Skynet took a total of 126 exposures ranging from 10s-160s each. We stacked subsets of these images to maximize the S/N ratio, and detected no optical source in either band at the OT position reported by GROND (Kann et al., GCN 16939). Our 3-sigma limiting magnitudes are:
```
==================================
tmid  scope   expos  fil  limit
==================================
50m  PROMPT1  25x160s V   >21.2
50m  PROMPT5  24x160s I   >20.6
45m  PROMPT8  46x80s  I   >20.3
==================================
```
Magnitudes are in the Vega System, calibrated to 3 APASS stars in the field. Magnitudes have not been corrected for line-of-sight Milky Way dust extinction, with expected E(B-V)=0.09 (Schlafly & Finkbeiner 2011).
No further Skynet observations are scheduled.
GCN Circular #17065
Klotz A., Turpin D. (IRAP-CNRS-OMP), Boer M., Gendre B., Siellez K., Dereli H., Bardho O. (UNS-CNRS-OCA), Atteia J.L. (IRAP-CNRS-OMP) report:
We imaged the field of GRB 141022A detected by SWIFT (trigger 616061) with the TAROT robotic telescope (D=25cm) located at the European Southern Observatory, La Silla observatory, Chile.
The observations started 71s after the GRB trigger (16s after the notice). The elevation of the field decreased from 24 degrees above horizon and weather conditions were excellent.
The first image is trailed with a duration of 60.0s (see the description in Klotz et al., 2006, A&A 451, L39). We do not detect any OT with a limiting magnitude of: t0+71s to t0+131s : Rlim = 16.4
The second image is 30.0s exposure in tracking mode: t0+145s to t0+175s : Rlim = 17.5
Later TAROT images (until 1800s) do not show any afterglow at Rlim = 17.5
Magnitudes were estimated with the nearby USNO-B1 stars and are not corrected for galactic dust extinction.

Back to JG's homepage

Jochen Greiner, last update: 13-Nov-2014 [Disclaimer]