(All information courtesy of the instrument teams.)
Previous IAU Circulars
TITLE: GCN/SWIFT NOTICE NOTICE_DATE: Sat 19 Apr 14 04:07:13 UT NOTICE_TYPE: Swift-BAT GRB Position TRIGGER_NUM: 596426, Seg_Num: 0 GRB_RA: 126.999d {+08h 28m 00s} (J2000), 127.249d {+08h 29m 00s} (current), 126.125d {+08h 24m 30s} (1950) GRB_DEC: +46.221d {+46d 13' 15"} (J2000), +46.173d {+46d 10' 22"} (current), +46.387d {+46d 23' 12"} (1950) GRB_ERROR: 3.00 [arcmin radius, statistical only] GRB_INTEN: 5971 [cnts] Image_Peak=299 [image_cnts] TRIGGER_DUR: 1.024 [sec] TRIGGER_INDEX: 155 E_range: 50-350 keV BKG_INTEN: 26680 [cnts] BKG_TIME: 14796.09 SOD {04:06:36.09} UT BKG_DUR: 8 [sec] GRB_DATE: 16766 TJD; 109 DOY; 14/04/19 GRB_TIME: 14811.07 SOD {04:06:51.07} UT GRB_PHI: 142.32 [deg] GRB_THETA: 36.53 [deg] SOLN_STATUS: 0x3 RATE_SIGNIF: 40.97 [sigma] IMAGE_SIGNIF: 11.96 [sigma] MERIT_PARAMS: +1 +0 +0 +0 +3 +1 +0 +0 -1 +0 SUN_POSTN: 26.99d {+01h 47m 58s} +11.13d {+11d 07' 50"} SUN_DIST: 88.95 [deg] Sun_angle= -6.7 [hr] (East of Sun) MOON_POSTN: 256.80d {+17h 07m 12s} -18.89d {-18d 53' 20"} MOON_DIST: 130.60 [deg] MOON_ILLUM: 83 [%] GAL_COORDS: 173.81, 35.52 [deg] galactic lon,lat of the burst (or transient) ECL_COORDS: 117.67, 26.27 [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 = 142.77,12.01 [deg].
TITLE: GCN/SWIFT NOTICE NOTICE_DATE: Sat 19 Apr 14 04:08:46 UT NOTICE_TYPE: Swift-XRT Position TRIGGER_NUM: 596426, Seg_Num: 0 GRB_RA: 126.9909d {+08h 27m 57.81s} (J2000), 127.2403d {+08h 28m 57.67s} (current), 126.1162d {+08h 24m 27.87s} (1950) GRB_DEC: +46.2416d {+46d 14' 29.7"} (J2000), +46.1936d {+46d 11' 36.8"} (current), +46.4074d {+46d 24' 26.6"} (1950) GRB_ERROR: 4.8 [arcsec radius, statistical plus systematic, 90% containment] GRB_INTEN: 5.09e-09 [erg/cm2/sec] GRB_SIGNIF: 11.57 [sigma] IMG_START_DATE: 16766 TJD; 109 DOY; 14/04/19 IMG_START_TIME: 14897.59 SOD {04:08:17.59} UT, 86.5 [sec] since BAT Trigger Time TAM[0-3]: 327.65 237.17 261.64 243.57 AMPLIFIER: 2 WAVEFORM: 134 SUN_POSTN: 26.99d {+01h 47m 58s} +11.13d {+11d 07' 51"} SUN_DIST: 88.94 [deg] Sun_angle= -6.7 [hr] (East of Sun) MOON_POSTN: 256.82d {+17h 07m 16s} -18.89d {-18d 53' 22"} MOON_DIST: 130.61 [deg] MOON_ILLUM: 83 [%] GAL_COORDS: 173.78, 35.52 [deg] galactic lon,lat of the burst ECL_COORDS: 117.66, 26.29 [deg] ecliptic lon,lat of the burst COMMENTS: SWIFT-XRT Coordinates. COMMENTS: The XRT position is 1.28 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 .
TITLE: GCN/SWIFT NOTICE NOTICE_DATE: Sat 19 Apr 14 04:09:06 UT NOTICE_TYPE: Swift-XRT Processed Image TRIGGER_NUM: 596426, Seg_Num: 0 GRB_RA: 126.9909d {+08h 27m 57.8s} (J2000), 127.2403d {+08h 28m 57.6s} (current), 126.1162d {+08h 24m 27.8s} (1950) GRB_DEC: +46.2416d {+46d 14' 29.7"} (J2000), +46.1936d {+46d 11' 36.8"} (current), +46.4074d {+46d 24' 26.6"} (1950) GRB_ERROR: 4.7 [arcsec, radius, statistical plus systematic] GRB_INTEN: 134 [cnts] IMG_START_DATE: 16766 TJD; 109 DOY; 14/04/19 IMG_START_TIME: 14897.59 SOD {04:08:17.59} UT, 86.5 [sec] since BAT Trigger Time CENTROID_X: 297.35, raw= 297 [pixels] CENTROID_Y: 270.98, raw= 271 [pixels] ROLL: 284.87 [deg] GAIN: 2 MODE: 3, Long Image mode WAVEFORM: 134 EXPO_TIME: 2.50 [sec] GRB_POS_XRT_Y: -63.21 GRB_POS_XRT_Z: -18.71 IMAGE_URL: sw00596426000msxps_rw.img SUN_POSTN: 26.99d {+01h 47m 58s} +11.13d {+11d 07' 51"} SUN_DIST: 88.94 [deg] Sun_angle= -6.7 [hr] (East of Sun) MOON_POSTN: 256.82d {+17h 07m 17s} -18.89d {-18d 53' 22"} MOON_DIST: 130.61 [deg] MOON_ILLUM: 83 [%] GAL_COORDS: 173.78, 35.52 [deg] galactic lon,lat of the burst ECL_COORDS: 117.66, 26.29 [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 .
TITLE: GCN/SWIFT NOTICE NOTICE_DATE: Sat 19 Apr 14 04:08:57 UT NOTICE_TYPE: Swift-XRT Image TRIGGER_NUM: 596426, Seg_Num: 0 GRB_RA: 126.9909d {+08h 27m 57.8s} (J2000), 127.2403d {+08h 28m 57.6s} (current), 126.1162d {+08h 24m 27.8s} (1950) GRB_DEC: +46.2416d {+46d 14' 29.7"} (J2000), +46.1936d {+46d 11' 36.8"} (current), +46.4074d {+46d 24' 26.6"} (1950) GRB_ERROR: 4.7 [arcsec, radius, statistical plus systematic] GRB_INTEN: 134 [cnts] IMG_START_DATE: 16766 TJD; 109 DOY; 14/04/19 IMG_START_TIME: 14897.59 SOD {04:08:17.59} UT, 86.5 [sec] since BAT Trigger Time CENTROID_X: 297.35, raw= 297 [pixels] CENTROID_Y: 270.98, raw= 271 [pixels] ROLL: 284.87 [deg] GAIN: 2 MODE: 3, Long Image mode WAVEFORM: 134 EXPO_TIME: 2.50 [sec] GRB_POS_XRT_Y: -63.21 GRB_POS_XRT_Z: -18.71 IMAGE_URL: sw00596426000msxps_rw.img SUN_POSTN: 26.99d {+01h 47m 58s} +11.13d {+11d 07' 51"} SUN_DIST: 88.94 [deg] Sun_angle= -6.7 [hr] (East of Sun) MOON_POSTN: 256.82d {+17h 07m 17s} -18.89d {-18d 53' 22"} MOON_DIST: 130.61 [deg] MOON_ILLUM: 83 [%] GAL_COORDS: 173.78, 35.52 [deg] galactic lon,lat of the burst ECL_COORDS: 117.66, 26.29 [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 .
TITLE: GCN/SWIFT NOTICE NOTICE_DATE: Sat 19 Apr 14 04:10:30 UT NOTICE_TYPE: Swift-BAT GRB Lightcurve TRIGGER_NUM: 596426, Seg_Num: 0 GRB_RA: 126.999d {+08h 28m 00s} (J2000), 127.249d {+08h 29m 00s} (current), 126.125d {+08h 24m 30s} (1950) GRB_DEC: +46.221d {+46d 13' 15"} (J2000), +46.173d {+46d 10' 22"} (current), +46.387d {+46d 23' 12"} (1950) GRB_DATE: 16766 TJD; 109 DOY; 14/04/19 GRB_TIME: 14811.07 SOD {04:06:51.07} UT TRIGGER_INDEX: 155 GRB_PHI: 142.32 [deg] GRB_THETA: 36.53 [deg] DELTA_TIME: -56.00 [sec] TRIGGER_DUR: 1.024 [sec] SOLN_STATUS: 0x3 RATE_SIGNIF: 40.97 [sigma] IMAGE_SIGNIF: 11.96 [sigma] LC_URL: sw00596426000msb.lc SUN_POSTN: 26.99d {+01h 47m 58s} +11.13d {+11d 07' 53"} SUN_DIST: 88.95 [deg] Sun_angle= -6.7 [hr] (East of Sun) MOON_POSTN: 256.84d {+17h 07m 21s} -18.89d {-18d 53' 23"} MOON_DIST: 130.62 [deg] MOON_ILLUM: 83 [%] GAL_COORDS: 173.81, 35.52 [deg] galactic lon,lat of the burst (or transient) ECL_COORDS: 117.67, 26.27 [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 = 142.77,12.01 [deg].
TITLE: GCN/SWIFT NOTICE NOTICE_DATE: Sat 19 Apr 14 04:12:36 UT NOTICE_TYPE: Swift-UVOT Source List TRIGGER_NUM: 596426, Seg_Num: 0 POINT_RA: 126.992d {+08h 27m 58s} (J2000) POINT_DEC: +46.223d {+46d 13' 22"} (J2000) POINT_ROLL: 284.868d IMG_START_DATE: 16766 TJD; 109 DOY; 14/04/19 IMG_START_TIME: 14907.73 SOD {04:08:27.73} UT, 96.7 [sec] since BAT Trigger Time FILTER: 10, White BKG_MEAN: 5.630 N_STARS: 113 X_OFFSET: 558 [pixels] Y_OFFSET: 645 [pixels] X_MAX: 1517 [pixels] Y_MAX: 1604 [pixels] DET_THRESH: 20 PHOTO_THRESH: 12 SL_URL: sw00596426000msufc0096.fits SUN_POSTN: 26.99d {+01h 47m 59s} +11.13d {+11d 07' 54"} SUN_DIST: 88.94 [deg] Sun_angle= -6.7 [hr] (East of Sun) MOON_POSTN: 256.86d {+17h 07m 26s} -18.89d {-18d 53' 25"} MOON_DIST: 130.64 [deg] MOON_ILLUM: 83 [%] GAL_COORDS: 173.80, 35.52 [deg] galactic lon,lat of the pointing direction ECL_COORDS: 117.66, 26.27 [deg] ecliptic lon,lat of the pointing direction COMMENTS: SWIFT-UVOT Source List.
TITLE: GCN/SWIFT NOTICE NOTICE_DATE: Sat 19 Apr 14 04:13:04 UT NOTICE_TYPE: Swift-UVOT Processed Source List TRIGGER_NUM: 596426, Seg_Num: 0 POINT_RA: 126.992d {+08h 27m 58s} (J2000) POINT_DEC: +46.223d {+46d 13' 22"} (J2000) POINT_ROLL: 284.868d IMG_START_DATE: 16766 TJD; 109 DOY; 14/04/19 IMG_START_TIME: 14907.73 SOD {04:08:27.73} UT, 96.7 [sec] since BAT Trigger Time FILTER: 10, White BKG_MEAN: 5.630 N_STARS: 113 X_OFFSET: 558 [pixels] Y_OFFSET: 645 [pixels] X_MAX: 1517 [pixels] Y_MAX: 1604 [pixels] DET_THRESH: 20 PHOTO_THRESH: 12 SL_URL: sw00596426000msufc0096.fits SUN_POSTN: 26.99d {+01h 47m 59s} +11.13d {+11d 07' 55"} SUN_DIST: 88.94 [deg] Sun_angle= -6.7 [hr] (East of Sun) MOON_POSTN: 256.86d {+17h 07m 27s} -18.89d {-18d 53' 26"} MOON_DIST: 130.65 [deg] MOON_ILLUM: 83 [%] GAL_COORDS: 173.80, 35.52 [deg] galactic lon,lat of the pointing direction ECL_COORDS: 117.66, 26.27 [deg] ecliptic lon,lat of the pointing direction COMMENTS: SWIFT-UVOT Processed Source List. COMMENTS: If you have elected to receive attachments: COMMENTS: The uvot_catalog_srclist.fits.gz file does not exist; skipping the attachment.
TITLE: GCN/SWIFT NOTICE NOTICE_DATE: Sat 19 Apr 14 04:14:05 UT NOTICE_TYPE: Swift-UVOT Image TRIGGER_NUM: 596426, Seg_Num: 0 POINT_RA: 126.992d {+08h 27m 58s} (J2000) POINT_DEC: +46.223d {+46d 13' 22"} (J2000) ROLL: 284.868d IMG_START_DATE: 16766 TJD; 109 DOY; 14/04/19 IMG_START_TIME: 14907.73 SOD {04:08:27.73} UT, 96.7 [sec] since BAT Trigger Time FILTER: 10, White EXPOSURE_ID: 419573319 X_OFFSET: 878 [pixels] Y_OFFSET: 965 [pixels] WIDTH: 160 [pixels] HEIGHT: 160 [pixels] X_GRB_POS: 1038 Y_GRB_POS: 1125 BINNING_INDEX: 1 IM_URL: sw00596426000msuni0108.fits SUN_POSTN: 27.00d {+01h 47m 59s} +11.13d {+11d 07' 56"} SUN_DIST: 88.94 [deg] Sun_angle= -6.7 [hr] (East of Sun) MOON_POSTN: 256.87d {+17h 07m 29s} -18.89d {-18d 53' 27"} MOON_DIST: 130.65 [deg] MOON_ILLUM: 83 [%] GAL_COORDS: 173.80, 35.52 [deg] galactic lon,lat of the pointing direction ECL_COORDS: 117.66, 26.27 [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).
TITLE: GCN/SWIFT NOTICE NOTICE_DATE: Sat 19 Apr 14 04:14:21 UT NOTICE_TYPE: Swift-UVOT Processed Image TRIGGER_NUM: 596426, Seg_Num: 0 POINT_RA: 126.992d {+08h 27m 58s} (J2000) POINT_DEC: +46.223d {+46d 13' 22"} (J2000) ROLL: 284.868d IMG_START_DATE: 16766 TJD; 109 DOY; 14/04/19 IMG_START_TIME: 14907.73 SOD {04:08:27.73} UT, 96.7 [sec] since BAT Trigger Time FILTER: 10, White EXPOSURE_ID: 419573319 X_OFFSET: 878 [pixels] Y_OFFSET: 965 [pixels] WIDTH: 160 [pixels] HEIGHT: 160 [pixels] X_GRB_POS: 1038 Y_GRB_POS: 1125 BINNING_INDEX: 1 IM_URL: sw00596426000msuni0108.fits SUN_POSTN: 27.00d {+01h 47m 59s} +11.13d {+11d 07' 56"} SUN_DIST: 88.94 [deg] Sun_angle= -6.7 [hr] (East of Sun) MOON_POSTN: 256.87d {+17h 07m 30s} -18.89d {-18d 53' 27"} MOON_DIST: 130.65 [deg] MOON_ILLUM: 83 [%] GAL_COORDS: 173.80, 35.52 [deg] galactic lon,lat of the pointing direction ECL_COORDS: 117.66, 26.27 [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: If you have elected to receive attachments: COMMENTS: The uvot_catalog_image.fits.gz file does not exist; skipping the attachment.
TITLE: GCN/SWIFT NOTICE NOTICE_DATE: Sat 19 Apr 14 04:18:49 UT NOTICE_TYPE: Swift-UVOT Source List TRIGGER_NUM: 596426, Seg_Num: 0 POINT_RA: 126.990d {+08h 27m 58s} (J2000) POINT_DEC: +46.225d {+46d 13' 29"} (J2000) POINT_ROLL: 284.866d IMG_START_DATE: 16766 TJD; 109 DOY; 14/04/19 IMG_START_TIME: 15119.73 SOD {04:11:59.73} UT, 308.7 [sec] since BAT Trigger Time FILTER: 7, U BKG_MEAN: 1.654 N_STARS: 89 X_OFFSET: 558 [pixels] Y_OFFSET: 645 [pixels] X_MAX: 1517 [pixels] Y_MAX: 1604 [pixels] DET_THRESH: 11 PHOTO_THRESH: 5 SL_URL: sw00596426000msufc0308.fits SUN_POSTN: 27.00d {+01h 48m 00s} +11.13d {+11d 07' 60"} SUN_DIST: 88.94 [deg] Sun_angle= -6.7 [hr] (East of Sun) MOON_POSTN: 256.92d {+17h 07m 41s} -18.89d {-18d 53' 32"} MOON_DIST: 130.69 [deg] MOON_ILLUM: 83 [%] GAL_COORDS: 173.80, 35.52 [deg] galactic lon,lat of the pointing direction ECL_COORDS: 117.66, 26.27 [deg] ecliptic lon,lat of the pointing direction COMMENTS: SWIFT-UVOT Source List.
TITLE: GCN/SWIFT NOTICE NOTICE_DATE: Sat 19 Apr 14 04:19:09 UT NOTICE_TYPE: Swift-UVOT Processed Source List TRIGGER_NUM: 596426, Seg_Num: 0 POINT_RA: 126.990d {+08h 27m 58s} (J2000) POINT_DEC: +46.225d {+46d 13' 29"} (J2000) POINT_ROLL: 284.866d IMG_START_DATE: 16766 TJD; 109 DOY; 14/04/19 IMG_START_TIME: 15119.73 SOD {04:11:59.73} UT, 308.7 [sec] since BAT Trigger Time FILTER: 7, U BKG_MEAN: 1.654 N_STARS: 89 X_OFFSET: 558 [pixels] Y_OFFSET: 645 [pixels] X_MAX: 1517 [pixels] Y_MAX: 1604 [pixels] DET_THRESH: 11 PHOTO_THRESH: 5 SL_URL: sw00596426000msufc0308.fits SUN_POSTN: 27.00d {+01h 48m 00s} +11.13d {+11d 08' 00"} SUN_DIST: 88.94 [deg] Sun_angle= -6.7 [hr] (East of Sun) MOON_POSTN: 256.92d {+17h 07m 42s} -18.89d {-18d 53' 32"} MOON_DIST: 130.69 [deg] MOON_ILLUM: 83 [%] GAL_COORDS: 173.80, 35.52 [deg] galactic lon,lat of the pointing direction ECL_COORDS: 117.66, 26.27 [deg] ecliptic lon,lat of the pointing direction COMMENTS: SWIFT-UVOT Processed Source List. COMMENTS: If you have elected to receive attachments: COMMENTS: The uvot_catalog_srclist.fits.gz file does not exist; skipping the attachment.
TITLE: GCN/SWIFT NOTICE NOTICE_DATE: Sat 19 Apr 14 04:20:19 UT NOTICE_TYPE: Swift-UVOT Image TRIGGER_NUM: 596426, Seg_Num: 0 POINT_RA: 126.990d {+08h 27m 58s} (J2000) POINT_DEC: +46.225d {+46d 13' 29"} (J2000) ROLL: 284.866d IMG_START_DATE: 16766 TJD; 109 DOY; 14/04/19 IMG_START_TIME: 15119.73 SOD {04:11:59.73} UT, 308.7 [sec] since BAT Trigger Time FILTER: 7, U EXPOSURE_ID: 419573531 X_OFFSET: 878 [pixels] Y_OFFSET: 965 [pixels] WIDTH: 160 [pixels] HEIGHT: 160 [pixels] X_GRB_POS: 1038 Y_GRB_POS: 1125 BINNING_INDEX: 1 IM_URL: sw00596426000msuni0320.fits SUN_POSTN: 27.00d {+01h 48m 00s} +11.13d {+11d 08' 01"} SUN_DIST: 88.94 [deg] Sun_angle= -6.7 [hr] (East of Sun) MOON_POSTN: 256.94d {+17h 07m 45s} -18.89d {-18d 53' 33"} MOON_DIST: 130.70 [deg] MOON_ILLUM: 83 [%] GAL_COORDS: 173.80, 35.52 [deg] galactic lon,lat of the pointing direction ECL_COORDS: 117.66, 26.27 [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).
TITLE: GCN/SWIFT NOTICE NOTICE_DATE: Sat 19 Apr 14 04:20:36 UT NOTICE_TYPE: Swift-UVOT Processed Image TRIGGER_NUM: 596426, Seg_Num: 0 POINT_RA: 126.990d {+08h 27m 58s} (J2000) POINT_DEC: +46.225d {+46d 13' 29"} (J2000) ROLL: 284.866d IMG_START_DATE: 16766 TJD; 109 DOY; 14/04/19 IMG_START_TIME: 15119.73 SOD {04:11:59.73} UT, 308.7 [sec] since BAT Trigger Time FILTER: 7, U EXPOSURE_ID: 419573531 X_OFFSET: 878 [pixels] Y_OFFSET: 965 [pixels] WIDTH: 160 [pixels] HEIGHT: 160 [pixels] X_GRB_POS: 1038 Y_GRB_POS: 1125 BINNING_INDEX: 1 IM_URL: sw00596426000msuni0320.fits SUN_POSTN: 27.00d {+01h 48m 00s} +11.13d {+11d 08' 01"} SUN_DIST: 88.94 [deg] Sun_angle= -6.7 [hr] (East of Sun) MOON_POSTN: 256.94d {+17h 07m 45s} -18.89d {-18d 53' 33"} MOON_DIST: 130.70 [deg] MOON_ILLUM: 83 [%] GAL_COORDS: 173.80, 35.52 [deg] galactic lon,lat of the pointing direction ECL_COORDS: 117.66, 26.27 [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: If you have elected to receive attachments: COMMENTS: The uvot_catalog_image.fits.gz file does not exist; skipping the attachment.
RA(J2000) = 08h 28m 00s Dec(J2000) = +46d 13' 15"with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve showed a multi-peaked structure with a duration of about 80 sec. The peak count rate was ~5611 counts/sec (15-350 keV), at ~52 sec after the trigger.
RA(J2000) = +08h 27m 57.82s Dec(J2000) = +46d 14' 29.8"with an uncertainty of 4.8 arcseconds (radius, 90% containment). This location is 76 arcseconds from the BAT onboard position, within the BAT error circle. No event data are yet available to determine the column density using X-ray spectroscopy.
TITLE: GCN/SWIFT NOTICE NOTICE_DATE: Sat 19 Apr 14 04:24:44 UT NOTICE_TYPE: Swift-UVOT Source List TRIGGER_NUM: 596426, Seg_Num: 0 POINT_RA: 126.990d {+08h 27m 58s} (J2000) POINT_DEC: +46.225d {+46d 13' 29"} (J2000) POINT_ROLL: 284.866d IMG_START_DATE: 16766 TJD; 109 DOY; 14/04/19 IMG_START_TIME: 15673.70 SOD {04:21:13.70} UT, 862.6 [sec] since BAT Trigger Time FILTER: 10, White BKG_MEAN: 3.039 N_STARS: 190 X_OFFSET: 318 [pixels] Y_OFFSET: 405 [pixels] X_MAX: 1757 [pixels] Y_MAX: 1844 [pixels] DET_THRESH: 14 PHOTO_THRESH: 8 SL_URL: sw00596426000msufc0862.fits SUN_POSTN: 27.00d {+01h 48m 01s} +11.13d {+11d 08' 05"} SUN_DIST: 88.94 [deg] Sun_angle= -6.7 [hr] (East of Sun) MOON_POSTN: 256.98d {+17h 07m 55s} -18.89d {-18d 53' 37"} MOON_DIST: 130.73 [deg] MOON_ILLUM: 83 [%] GAL_COORDS: 173.80, 35.52 [deg] galactic lon,lat of the pointing direction ECL_COORDS: 117.66, 26.27 [deg] ecliptic lon,lat of the pointing direction COMMENTS: SWIFT-UVOT Source List.
TITLE: GCN/SWIFT NOTICE NOTICE_DATE: Sat 19 Apr 14 04:25:08 UT NOTICE_TYPE: Swift-UVOT Processed Source List TRIGGER_NUM: 596426, Seg_Num: 0 POINT_RA: 126.990d {+08h 27m 58s} (J2000) POINT_DEC: +46.225d {+46d 13' 29"} (J2000) POINT_ROLL: 284.866d IMG_START_DATE: 16766 TJD; 109 DOY; 14/04/19 IMG_START_TIME: 15673.70 SOD {04:21:13.70} UT, 862.6 [sec] since BAT Trigger Time FILTER: 10, White BKG_MEAN: 3.039 N_STARS: 190 X_OFFSET: 318 [pixels] Y_OFFSET: 405 [pixels] X_MAX: 1757 [pixels] Y_MAX: 1844 [pixels] DET_THRESH: 14 PHOTO_THRESH: 8 SL_URL: sw00596426000msufc0862.fits SUN_POSTN: 27.00d {+01h 48m 01s} +11.13d {+11d 08' 05"} SUN_DIST: 88.93 [deg] Sun_angle= -6.7 [hr] (East of Sun) MOON_POSTN: 256.98d {+17h 07m 56s} -18.89d {-18d 53' 38"} MOON_DIST: 130.73 [deg] MOON_ILLUM: 83 [%] GAL_COORDS: 173.80, 35.52 [deg] galactic lon,lat of the pointing direction ECL_COORDS: 117.66, 26.27 [deg] ecliptic lon,lat of the pointing direction COMMENTS: SWIFT-UVOT Processed Source List. COMMENTS: All 4 attachments are included.
TITLE: GCN/SWIFT NOTICE NOTICE_DATE: Sat 19 Apr 14 04:25:34 UT NOTICE_TYPE: Swift-XRT Position UPDATE TRIGGER_NUM: 596426, Seg_Num: 0 GRB_RA: 126.9872d {+08h 27m 56.92s} (J2000), 127.2366d {+08h 28m 56.78s} (current), 126.1124d {+08h 24m 26.98s} (1950) GRB_DEC: +46.2409d {+46d 14' 27.2"} (J2000), +46.1929d {+46d 11' 34.3"} (current), +46.4067d {+46d 24' 24.1"} (1950) GRB_ERROR: 2.7 [arcsec radius, statistical plus systematic, 90% containment] GRB_INTEN: 1.00e-10 [erg/cm2/sec] GRB_SIGNIF: 10.00 [sigma] IMG_START_DATE: 16766 TJD; 109 DOY; 14/04/19 IMG_START_TIME: 15660.00 SOD {04:21:00.00} UT, 848.9 [sec] since BAT Trigger Time TAM[0-3]: 100.00 100.00 100.00 100.00 AMPLIFIER: 1 WAVEFORM: 31 SUN_POSTN: 27.00d {+01h 48m 01s} +11.13d {+11d 08' 06"} SUN_DIST: 88.93 [deg] Sun_angle= -6.7 [hr] (East of Sun) MOON_POSTN: 256.99d {+17h 07m 57s} -18.89d {-18d 53' 38"} MOON_DIST: 130.73 [deg] MOON_ILLUM: 83 [%] GAL_COORDS: 173.78, 35.52 [deg] galactic lon,lat of the burst ECL_COORDS: 117.65, 26.29 [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%.
TITLE: GCN/SWIFT NOTICE NOTICE_DATE: Sat 19 Apr 14 04:26:12 UT NOTICE_TYPE: Swift-UVOT Image TRIGGER_NUM: 596426, Seg_Num: 0 POINT_RA: 126.990d {+08h 27m 58s} (J2000) POINT_DEC: +46.225d {+46d 13' 29"} (J2000) ROLL: 284.866d IMG_START_DATE: 16766 TJD; 109 DOY; 14/04/19 IMG_START_TIME: 15673.70 SOD {04:21:13.70} UT, 862.6 [sec] since BAT Trigger Time FILTER: 10, White EXPOSURE_ID: 419574085 X_OFFSET: 877 [pixels] Y_OFFSET: 964 [pixels] WIDTH: 160 [pixels] HEIGHT: 160 [pixels] X_GRB_POS: 1037 Y_GRB_POS: 1124 BINNING_INDEX: 1 IM_URL: sw00596426000msuni0874.fits SUN_POSTN: 27.00d {+01h 48m 01s} +11.14d {+11d 08' 06"} SUN_DIST: 88.93 [deg] Sun_angle= -6.7 [hr] (East of Sun) MOON_POSTN: 257.00d {+17h 07m 59s} -18.89d {-18d 53' 39"} MOON_DIST: 130.74 [deg] MOON_ILLUM: 83 [%] GAL_COORDS: 173.80, 35.52 [deg] galactic lon,lat of the pointing direction ECL_COORDS: 117.66, 26.27 [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).
TITLE: GCN/SWIFT NOTICE NOTICE_DATE: Sat 19 Apr 14 04:26:27 UT NOTICE_TYPE: Swift-UVOT Processed Image TRIGGER_NUM: 596426, Seg_Num: 0 POINT_RA: 126.990d {+08h 27m 58s} (J2000) POINT_DEC: +46.225d {+46d 13' 29"} (J2000) ROLL: 284.866d IMG_START_DATE: 16766 TJD; 109 DOY; 14/04/19 IMG_START_TIME: 15673.70 SOD {04:21:13.70} UT, 862.6 [sec] since BAT Trigger Time FILTER: 10, White EXPOSURE_ID: 419574085 X_OFFSET: 877 [pixels] Y_OFFSET: 964 [pixels] WIDTH: 160 [pixels] HEIGHT: 160 [pixels] X_GRB_POS: 1037 Y_GRB_POS: 1124 BINNING_INDEX: 1 IM_URL: sw00596426000msuni0874.fits SUN_POSTN: 27.00d {+01h 48m 01s} +11.14d {+11d 08' 06"} SUN_DIST: 88.93 [deg] Sun_angle= -6.7 [hr] (East of Sun) MOON_POSTN: 257.00d {+17h 08m 00s} -18.89d {-18d 53' 39"} MOON_DIST: 130.74 [deg] MOON_ILLUM: 83 [%] GAL_COORDS: 173.80, 35.52 [deg] galactic lon,lat of the pointing direction ECL_COORDS: 117.66, 26.27 [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.
TITLE: GCN/SWIFT NOTICE NOTICE_DATE: Sat 19 Apr 14 04:28:14 UT NOTICE_TYPE: Swift-UVOT Position TRIGGER_NUM: 596426, Seg_Num: 0 GRB_RA: 126.9897d {+08h 27m 57.52s} (J2000), 127.2391d {+08h 28m 57.38s} (current), 126.1150d {+08h 24m 27.59s} (1950) GRB_DEC: +46.2403d {+46d 14' 25.0"} (J2000), +46.1923d {+46d 11' 32.1"} (current), +46.4061d {+46d 24' 21.9"} (1950) GRB_ERROR: 1.1 [arcsec radius, statistical only] GRB_MAG: 18.15 +/- 0.40 [mag] FILTER: 10, White IMG_START_DATE: 16766 TJD; 109 DOY; 14/04/19 IMG_START_TIME: 15672.00 SOD {04:21:12.00} UT, 860.9 [sec] since BAT Trigger Time SUN_POSTN: 27.00d {+01h 48m 01s} +11.14d {+11d 08' 08"} SUN_DIST: 88.93 [deg] Sun_angle= -6.7 [hr] (East of Sun) MOON_POSTN: 257.02d {+17h 08m 04s} -18.89d {-18d 53' 41"} MOON_DIST: 130.75 [deg] MOON_ILLUM: 83 [%] GAL_COORDS: 173.78, 35.52 [deg] galactic lon,lat of the burst (or transient) ECL_COORDS: 117.65, 26.29 [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 5.4 arcsec from the XRT position. COMMENTS: Result based on srclist data. COMMENTS: Notice generated automatically.
08:27:57.56 +46:14:25.11with uncertainty of about 1". We suggest this to be the afterglow of the GRB. Follow-up observations encouraged.
08:27:57.7 +46:14:25.9 (J2000), with positional uncertainty of 1' or better start UT mag mlim(of image) ---------------------------------- 04:07:18.7 13.5 15.0The object first detected with a magnitude of ~13.5, brightened to 12.5 magnitudes in ~70 seconds then the brightness decayed fast to ~14.3 magnitudes at about 350 seconds.
r 16.22 +/- 0.01 i 15.81 +/- 0.01 Z 15.66 +/- 0.01 Y 15.46 +/- 0.02 J 15.31 +/- 0.01 H 15.26 +/- 0.02These magnitudes are in the AB system and are not corrected for Galactic extinction in the direction of the GRB. The source appears to be fading approximately as t^(-1) in all of our bands during the observation.
filter starttime endtime magnitude error wh 96 246 16.01 0.06 u 308 558 >19.6 wh 862 1012 17.96 0.09.The source is not seen in the u filter, which suggests a redshift larger then 2.8.
RA (J2000): 08h 27m 57.53s Dec (J2000): +46d 14' 24.3"with an uncertainty of 1.5 arcsec (radius, 90% confidence).
Tmid(s)+T0 Filter Exp. time Mag Mag err. 9536 unfiltered 4x300s 17.86CR 0.12
RA(J2000) = 08h 28m 00.4s Dec(J2000) = +46d 14' 03.7"with an uncertainty of 1.0 arcmin, (radius, sys+stat, 90% containment). The partial coding was 33%.
Galactic foreground: 3.9 x 10^20 cm^-2 Intrinsic column: 1.2 (+/-0.6) x 10^22 cm^-2 at z=3.956 Photon index: 1.83 (+/-0.06)If the light curve continues to decay with a power-law decay index of 1.29, the count rate at T+24 hours will be 0.042 count s^-1, corresponding to an observed (unabsorbed) 0.3-10 keV flux of 1.5 x 10^-12 (1.7 x 10^-12) erg cm^-2 s^-1.
r' = 16.91 +/- 0.03 at dt = 33.7 min i' = 16.56 +/- 0.03 at dt = 35.1 min z' = 16.45 +/- 0.04 at dt = 36.5 minThe redder r'-i' color is consistent with the Lyman break falling in the observed r' bandpass, as reported by Tanvir et al. (GCN 16125).
RA (J2000) = 08:27:57.56 = 126.98982 (deg.) Dec (J2000) = +46:14:25.3 = 46.24037 (deg.)with an estimated uncertainty of 0.50 arc sec. (radius, 90% confidence).
Filter T_start(s) T_stop(s) Exp(s) Mag white 97 246 147 16.2 +/- 0.2 v 638 658 19 16.1 +/- 0.2 b 564 756 39 18.4 +/- 0.2 u 309 2003 362 >21.0 w1 687 707 19 >18.1The magnitudes in the table are not corrected for the Galactic extinction due to the reddening of E(B-V) = 0.03 in the direction of the burst (Schlegel et al. 1998).
#T0+[day] MID-UT T-EXP[sec] g' Rc Rc_err Ic Ic_err ----------------------------------------------------------------------- 0.36126 12:47:03 8700.0 >20.1 19.8 0.3 19.1 0.3 ------------------------------------------------------------------------ T0+ : Elapsed time after the burst [day] T-EXP: Total Exposure time [sec]
#T0+[day] MID-UT T-EXP[sec] g' g'_err Rc Rc_err Ic Ic_err ---------------------------------------------------------------------- 0.39781 13:39:41 5820.0 20.6 0.1 19.5 0.1 19.1 0.1 ---------------------------------------------------------------------- T0+ : Elapsed time after the burst [day] T-EXP: Total Exposure time [sec]
r 21.35 +/- 0.04 i 20.76 +/- 0.04 Z 20.61 +/- 0.06 Y 20.45 +/- 0.07 J 20.35 +/- 0.08 H 20.32 +/- 0.10These magnitudes are in the AB system and are not corrected for Galactic extinction in the direction of the GRB. In comparison to the previous epoch of RATIR observations (Butler, et al., GCN 16121) we find that the source has continued to fade with an approximate power-law index of alpha =3D 1.2 in all six bands.
Tmid-T0(hr) Mag MagErr 43.24 >22.5 43.54 23.16 0.15 43.86 >20.3Compared with previous measurements (e.g., from RATIR and KAIT), the afterglow may be decaying more quickly.
r 21.92 +/- 0.07 i 21.77 +/- 0.07 Z 21.74 +/- 0.13 Y 21.58 +/- 0.19 J 21.54 +/- 0.21 H > 21.66These magnitudes are in the AB system and are not corrected for Galactic extinction in the direction of the GRB. In comparison to the first two epochs of RATIR observations (Littlejohns, et al., GCN 16136; Butler, et al., GCN 16121) we note that the decay in the NIR bands appears steeper, now consistent with 1.4 < alpha < 1.6 in the i, Z, Y, J and H bands (see also; Xu et al., GCN 16138). The XRT data for this GRB (http://www.swift.ac.uk/xrt_curves/00596426/) may support a temporal break at low significance after 100 ks. Further XRTdata can constrain this possibility.
date UT start t-T0 Filter Exp. OT Uplim (mid, days) (s) 3sigma 2014-04-19 16:26:35 0.52030 R 10*60 n/d 19.3 2014-04-20 14:49:15 1.47495 R 83*60 21.12 +/- 0.10 21.6 2014-04-21 14:58:36 2.49015 R 107*60 21.60 +/- 0.15 22.2The photometry is based on nearby SDSS star, R (gri -> R transformations by Lupton 2005):
SDSS id R J082752.69+461357.4 17.381 +/- 0.018
date UT(mid time) Filter mag 2014/04/19 07:30:51 R 18.64 +/-0.29 2014/04/21 03:39:38 R 21.43 +/-0.27We thank the LOAO operator, Jae-Hyuk Yoon for performing the observation.
date UT start t-T0 Filter Exp. OT (mid, days) (s) 2014-04-22 14:49:26 3.45342 R 120*60 22.18 +/- 0.09The photometry is based on nearby SDSS star, R (gri -> R transformations=20 by Lupton 2005):
SDSS id R J082752.69+461357.4 17.381 =C2=B1 0.018
date UT start t-T0 Filter Exp. OT (mid, days) (s) 2014-04-25 14:48:25 6.47713 R 90*60 22.81+/-0.17 2014-04-26 14:21:55 7.45841 R 90*60 >21.7 (3 sigma)The photometry is based on nearby SDSS star, R (gri -> R transformations by Lupton 2005):
SDSS id R J082752.69+461357.4 17.381+/-0.018