(All information courtesy of the instrument teams.)
Previous IAU Circulars
TITLE: GCN/SWIFT NOTICE NOTICE_DATE: Fri 04 Oct 19 21:33:56 UT NOTICE_TYPE: Swift-BAT GRB Position TRIGGER_NUM: 927839, Seg_Num: 0 GRB_RA: 49.177d {+03h 16m 42s} (J2000), 49.361d {+03h 17m 27s} (current), 48.710d {+03h 14m 51s} (1950) GRB_DEC: -39.613d {-39d 36' 46"} (J2000), -39.541d {-39d 32' 28"} (current), -39.796d {-39d 47' 44"} (1950) GRB_ERROR: 3.00 [arcmin radius, statistical only] GRB_INTEN: 2163 [cnts] Image_Peak=168 [image_cnts] TRIGGER_DUR: 0.512 [sec] TRIGGER_INDEX: 124 E_range: 25-100 keV BKG_INTEN: 22435 [cnts] BKG_TIME: 77608.30 SOD {21:33:28.30} UT BKG_DUR: 8 [sec] GRB_DATE: 18760 TJD; 277 DOY; 19/10/04 GRB_TIME: 77621.68 SOD {21:33:41.68} UT GRB_PHI: -133.04 [deg] GRB_THETA: 13.94 [deg] SOLN_STATUS: 0x3 RATE_SIGNIF: 18.52 [sigma] IMAGE_SIGNIF: 9.55 [sigma] MERIT_PARAMS: +1 +0 +0 -1 +2 +0 +0 +0 +54 +0 SUN_POSTN: 190.45d {+12h 41m 49s} -4.50d {-04d 29' 48"} SUN_DIST: 123.25 [deg] Sun_angle= 9.4 [hr] (West of Sun) MOON_POSTN: 272.38d {+18h 09m 31s} -22.38d {-22d 23' 00"} MOON_DIST: 106.20 [deg] MOON_ILLUM: 42 [%] GAL_COORDS: 244.87,-57.48 [deg] galactic lon,lat of the burst (or transient) ECL_COORDS: 29.18,-54.77 [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 = 109.82,18.90 [deg].
TITLE: GCN/INTEGRAL NOTICE NOTICE_DATE: Fri 04 Oct 19 21:34:35 UT NOTICE_TYPE: INTEGRAL SPI ACS Trigger TRIGGER_NUM: 8384, Sub_Num: 0 GRB_INTEN: 9.29 [sigma] GRB_TIME: 77625.57 SOD {21:33:45.57} UT GRB_DATE: 18760 TJD; 277 DOY; 19/10/04 COMMENTS: INTEGRAL SPI_ACS GRB Trigger. COMMENTS: Time_Scale=0.8000 and Time_Error=0.4000. COMMENTS: COMMENTS: NOTE: This SPIACS event is temporally(4.0<100sec) coincident with the SWIFT_BAT event (trignum=927839). COMMENTS: COMMENTS: The SPIACS lightcurve can be found at: COMMENTS: ftp://isdcarc.unige.ch/arc/FTP/ibas/spiacs/2019-10/2019-10-04T21-33-45.3749-02120-27536-0.lc
TITLE: GCN/SWIFT NOTICE NOTICE_DATE: Fri 04 Oct 19 21:35:31 UT NOTICE_TYPE: Swift-XRT Processed Image TRIGGER_NUM: 927839, Seg_Num: 0 GRB_RA: 49.2021d {+03h 16m 48.5s} (J2000), 49.3863d {+03h 17m 32.7s} (current), 48.7361d {+03h 14m 56.6s} (1950) GRB_DEC: -39.6353d {-39d 38' 07.0"} (J2000), -39.5636d {-39d 33' 48.8"} (current), -39.8181d {-39d 49' 05.0"} (1950) GRB_ERROR: 5.0 [arcsec, radius, statistical plus systematic] GRB_INTEN: 74 [cnts] IMG_START_DATE: 18760 TJD; 277 DOY; 19/10/04 IMG_START_TIME: 77679.36 SOD {21:34:39.36} UT, 57.7 [sec] since BAT Trigger Time CENTROID_X: 246.94, raw= 247 [pixels] CENTROID_Y: 287.07, raw= 287 [pixels] ROLL: 131.75 [deg] GAIN: 1 MODE: 3, Long Image mode WAVEFORM: 134 EXPO_TIME: 2.50 [sec] GRB_POS_XRT_Y: -25.99 GRB_POS_XRT_Z: -142.51 IMAGE_URL: sw00927839000msxps_rw.img SUN_POSTN: 190.46d {+12h 41m 49s} -4.50d {-04d 29' 49"} SUN_DIST: 123.22 [deg] Sun_angle= 9.4 [hr] (West of Sun) MOON_POSTN: 272.39d {+18h 09m 35s} -22.38d {-22d 23' 03"} MOON_DIST: 106.18 [deg] MOON_ILLUM: 42 [%] GAL_COORDS: 244.90,-57.45 [deg] galactic lon,lat of the burst ECL_COORDS: 29.19,-54.80 [deg] ecliptic lon,lat of the burst COMMENTS: SWIFT-XRT Processed Image.
TITLE: GCN/SWIFT NOTICE NOTICE_DATE: Fri 04 Oct 19 21:35:22 UT NOTICE_TYPE: Swift-XRT Image TRIGGER_NUM: 927839, Seg_Num: 0 GRB_RA: 49.2021d {+03h 16m 48.5s} (J2000), 49.3863d {+03h 17m 32.7s} (current), 48.7361d {+03h 14m 56.6s} (1950) GRB_DEC: -39.6353d {-39d 38' 07.0"} (J2000), -39.5636d {-39d 33' 48.8"} (current), -39.8181d {-39d 49' 05.0"} (1950) GRB_ERROR: 5.0 [arcsec, radius, statistical plus systematic] GRB_INTEN: 74 [cnts] IMG_START_DATE: 18760 TJD; 277 DOY; 19/10/04 IMG_START_TIME: 77679.36 SOD {21:34:39.36} UT, 57.7 [sec] since BAT Trigger Time CENTROID_X: 246.94, raw= 247 [pixels] CENTROID_Y: 287.07, raw= 287 [pixels] ROLL: 131.75 [deg] GAIN: 1 MODE: 3, Long Image mode WAVEFORM: 134 EXPO_TIME: 2.50 [sec] GRB_POS_XRT_Y: -25.99 GRB_POS_XRT_Z: -142.51 IMAGE_URL: sw00927839000msxps_rw.img SUN_POSTN: 190.46d {+12h 41m 49s} -4.50d {-04d 29' 49"} SUN_DIST: 123.22 [deg] Sun_angle= 9.4 [hr] (West of Sun) MOON_POSTN: 272.39d {+18h 09m 34s} -22.38d {-22d 23' 03"} MOON_DIST: 106.18 [deg] MOON_ILLUM: 42 [%] GAL_COORDS: 244.90,-57.45 [deg] galactic lon,lat of the burst ECL_COORDS: 29.19,-54.80 [deg] ecliptic lon,lat of the burst COMMENTS: SWIFT-XRT Image.
TITLE: GCN/SWIFT NOTICE NOTICE_DATE: Fri 04 Oct 19 21:35:12 UT NOTICE_TYPE: Swift-XRT Position TRIGGER_NUM: 927839, Seg_Num: 0 GRB_RA: 49.2021d {+03h 16m 48.50s} (J2000), 49.3863d {+03h 17m 32.70s} (current), 48.7361d {+03h 14m 56.66s} (1950) GRB_DEC: -39.6353d {-39d 38' 07.0"} (J2000), -39.5636d {-39d 33' 48.8"} (current), -39.8181d {-39d 49' 05.0"} (1950) GRB_ERROR: 5.2 [arcsec radius, statistical plus systematic, 90% containment] GRB_INTEN: 1.81e-09 [erg/cm2/sec] GRB_SIGNIF: 8.60 [sigma] IMG_START_DATE: 18760 TJD; 277 DOY; 19/10/04 IMG_START_TIME: 77679.36 SOD {21:34:39.36} UT, 57.7 [sec] since BAT Trigger Time TAM[0-3]: 327.64 237.20 261.62 243.44 AMPLIFIER: 2 WAVEFORM: 134 SUN_POSTN: 190.46d {+12h 41m 49s} -4.50d {-04d 29' 49"} SUN_DIST: 123.22 [deg] Sun_angle= 9.4 [hr] (West of Sun) MOON_POSTN: 272.39d {+18h 09m 34s} -22.38d {-22d 23' 02"} MOON_DIST: 106.18 [deg] MOON_ILLUM: 42 [%] GAL_COORDS: 244.90,-57.45 [deg] galactic lon,lat of the burst ECL_COORDS: 29.19,-54.80 [deg] ecliptic lon,lat of the burst COMMENTS: SWIFT-XRT Coordinates. COMMENTS: The XRT position is 1.77 arcmin from the BAT position.
TITLE: GCN/SWIFT NOTICE NOTICE_DATE: Fri 04 Oct 19 21:37:40 UT NOTICE_TYPE: Swift-BAT GRB Lightcurve TRIGGER_NUM: 927839, Seg_Num: 0 GRB_RA: 49.177d {+03h 16m 42s} (J2000), 49.361d {+03h 17m 27s} (current), 48.710d {+03h 14m 51s} (1950) GRB_DEC: -39.613d {-39d 36' 46"} (J2000), -39.541d {-39d 32' 28"} (current), -39.796d {-39d 47' 44"} (1950) GRB_DATE: 18760 TJD; 277 DOY; 19/10/04 GRB_TIME: 77621.68 SOD {21:33:41.68} UT TRIGGER_INDEX: 124 GRB_PHI: -133.04 [deg] GRB_THETA: 13.94 [deg] DELTA_TIME: -57.00 [sec] TRIGGER_DUR: 0.512 [sec] SOLN_STATUS: 0x3 RATE_SIGNIF: 18.52 [sigma] IMAGE_SIGNIF: 9.55 [sigma] LC_URL: sw00927839000msb.lc SUN_POSTN: 190.46d {+12h 41m 50s} -4.50d {-04d 29' 52"} SUN_DIST: 123.25 [deg] Sun_angle= 9.4 [hr] (West of Sun) MOON_POSTN: 272.41d {+18h 09m 40s} -22.39d {-22d 23' 08"} MOON_DIST: 106.18 [deg] MOON_ILLUM: 42 [%] GAL_COORDS: 244.87,-57.48 [deg] galactic lon,lat of the burst (or transient) ECL_COORDS: 29.18,-54.77 [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 = 109.82,18.90 [deg].
TITLE: GCN/SWIFT NOTICE NOTICE_DATE: Fri 04 Oct 19 21:37:54 UT NOTICE_TYPE: Swift-UVOT Source List TRIGGER_NUM: 927839, Seg_Num: 0 POINT_RA: 49.170d {+03h 16m 41s} (J2000) POINT_DEC: -39.603d {-39d 36' 11"} (J2000) POINT_ROLL: 131.749d IMG_START_DATE: 18760 TJD; 277 DOY; 19/10/04 IMG_START_TIME: 77690.55 SOD {21:34:50.55} UT, 68.9 [sec] since BAT Trigger Time FILTER: 10, White BKG_MEAN: 1.491 N_STARS: 22 X_OFFSET: 760 [pixels] Y_OFFSET: 445 [pixels] X_MAX: 1719 [pixels] Y_MAX: 1404 [pixels] DET_THRESH: 10 PHOTO_THRESH: 5 SL_URL: sw00927839000msufc0068.fits SUN_POSTN: 190.46d {+12h 41m 50s} -4.50d {-04d 29' 52"} SUN_DIST: 123.26 [deg] Sun_angle= 9.4 [hr] (West of Sun) MOON_POSTN: 272.42d {+18h 09m 40s} -22.39d {-22d 23' 08"} MOON_DIST: 106.18 [deg] MOON_ILLUM: 42 [%] GAL_COORDS: 244.85,-57.48 [deg] galactic lon,lat of the pointing direction ECL_COORDS: 29.18,-54.76 [deg] ecliptic lon,lat of the pointing direction COMMENTS: SWIFT-UVOT Source List.
TITLE: GCN/SWIFT NOTICE NOTICE_DATE: Fri 04 Oct 19 21:38:08 UT NOTICE_TYPE: Swift-UVOT Processed Source List TRIGGER_NUM: 927839, Seg_Num: 0 POINT_RA: 49.170d {+03h 16m 41s} (J2000) POINT_DEC: -39.603d {-39d 36' 11"} (J2000) POINT_ROLL: 131.749d IMG_START_DATE: 18760 TJD; 277 DOY; 19/10/04 IMG_START_TIME: 77690.55 SOD {21:34:50.55} UT, 68.9 [sec] since BAT Trigger Time FILTER: 10, White BKG_MEAN: 1.491 N_STARS: 22 X_OFFSET: 760 [pixels] Y_OFFSET: 445 [pixels] X_MAX: 1719 [pixels] Y_MAX: 1404 [pixels] DET_THRESH: 10 PHOTO_THRESH: 5 SL_URL: sw00927839000msufc0068.fits SUN_POSTN: 190.46d {+12h 41m 50s} -4.50d {-04d 29' 52"} SUN_DIST: 123.26 [deg] Sun_angle= 9.4 [hr] (West of Sun) MOON_POSTN: 272.42d {+18h 09m 41s} -22.39d {-22d 23' 09"} MOON_DIST: 106.18 [deg] MOON_ILLUM: 42 [%] GAL_COORDS: 244.85,-57.48 [deg] galactic lon,lat of the pointing direction ECL_COORDS: 29.18,-54.76 [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: Fri 04 Oct 19 21:39:12 UT NOTICE_TYPE: Swift-UVOT Image TRIGGER_NUM: 927839, Seg_Num: 0 POINT_RA: 49.170d {+03h 16m 41s} (J2000) POINT_DEC: -39.603d {-39d 36' 11"} (J2000) ROLL: 131.749d IMG_START_DATE: 18760 TJD; 277 DOY; 19/10/04 IMG_START_TIME: 77690.55 SOD {21:34:50.55} UT, 68.9 [sec] since BAT Trigger Time FILTER: 10, White EXPOSURE_ID: 591917714 X_OFFSET: 1080 [pixels] Y_OFFSET: 765 [pixels] WIDTH: 160 [pixels] HEIGHT: 160 [pixels] X_GRB_POS: 1240 Y_GRB_POS: 925 BINNING_INDEX: 1 IM_URL: sw00927839000msuni0092.fits SUN_POSTN: 190.46d {+12h 41m 50s} -4.50d {-04d 29' 53"} SUN_DIST: 123.26 [deg] Sun_angle= 9.4 [hr] (West of Sun) MOON_POSTN: 272.43d {+18h 09m 43s} -22.39d {-22d 23' 11"} MOON_DIST: 106.17 [deg] MOON_ILLUM: 42 [%] GAL_COORDS: 244.85,-57.48 [deg] galactic lon,lat of the pointing direction ECL_COORDS: 29.18,-54.76 [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: Fri 04 Oct 19 21:39:26 UT NOTICE_TYPE: Swift-UVOT Processed Image TRIGGER_NUM: 927839, Seg_Num: 0 POINT_RA: 49.170d {+03h 16m 41s} (J2000) POINT_DEC: -39.603d {-39d 36' 11"} (J2000) ROLL: 131.749d IMG_START_DATE: 18760 TJD; 277 DOY; 19/10/04 IMG_START_TIME: 77690.55 SOD {21:34:50.55} UT, 68.9 [sec] since BAT Trigger Time FILTER: 10, White EXPOSURE_ID: 591917714 X_OFFSET: 1080 [pixels] Y_OFFSET: 765 [pixels] WIDTH: 160 [pixels] HEIGHT: 160 [pixels] X_GRB_POS: 1240 Y_GRB_POS: 925 BINNING_INDEX: 1 IM_URL: sw00927839000msuni0092.fits SUN_POSTN: 190.46d {+12h 41m 50s} -4.50d {-04d 29' 53"} SUN_DIST: 123.26 [deg] Sun_angle= 9.4 [hr] (West of Sun) MOON_POSTN: 272.43d {+18h 09m 44s} -22.39d {-22d 23' 12"} MOON_DIST: 106.17 [deg] MOON_ILLUM: 42 [%] GAL_COORDS: 244.85,-57.48 [deg] galactic lon,lat of the pointing direction ECL_COORDS: 29.18,-54.76 [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.
TITLE: GCN/SWIFT NOTICE NOTICE_DATE: Fri 04 Oct 19 21:41:16 UT NOTICE_TYPE: Swift-UVOT Source List TRIGGER_NUM: 927839, Seg_Num: 0 POINT_RA: 49.166d {+03h 16m 40s} (J2000) POINT_DEC: -39.603d {-39d 36' 11"} (J2000) POINT_ROLL: 131.752d IMG_START_DATE: 18760 TJD; 277 DOY; 19/10/04 IMG_START_TIME: 77902.51 SOD {21:38:22.51} UT, 280.8 [sec] since BAT Trigger Time FILTER: 7, U BKG_MEAN: 0.315 N_STARS: 4 X_OFFSET: 760 [pixels] Y_OFFSET: 445 [pixels] X_MAX: 1719 [pixels] Y_MAX: 1404 [pixels] DET_THRESH: 6 PHOTO_THRESH: 2 SL_URL: sw00927839000msufc0280.fits SUN_POSTN: 190.46d {+12h 41m 50s} -4.50d {-04d 29' 55"} SUN_DIST: 123.27 [deg] Sun_angle= 9.4 [hr] (West of Sun) MOON_POSTN: 272.45d {+18h 09m 48s} -22.39d {-22d 23' 16"} MOON_DIST: 106.16 [deg] MOON_ILLUM: 42 [%] GAL_COORDS: 244.86,-57.49 [deg] galactic lon,lat of the pointing direction ECL_COORDS: 29.18,-54.76 [deg] ecliptic lon,lat of the pointing direction COMMENTS: SWIFT-UVOT Source List.
TITLE: GCN/SWIFT NOTICE NOTICE_DATE: Fri 04 Oct 19 21:41:51 UT NOTICE_TYPE: Swift-UVOT Position TRIGGER_NUM: 927839, Seg_Num: 0 GRB_RA: 49.2045d {+03h 16m 49.08s} (J2000), 49.3887d {+03h 17m 33.28s} (current), 48.7385d {+03h 14m 57.24s} (1950) GRB_DEC: -39.6342d {-39d 38' 03.1"} (J2000), -39.5625d {-39d 33' 44.8"} (current), -39.8170d {-39d 49' 01.0"} (1950) GRB_ERROR: 0.6 [arcsec radius, statistical only] GRB_MAG: 18.00 +/- 0.14 [mag] FILTER: 10, White IMG_START_DATE: 18760 TJD; 277 DOY; 19/10/04 IMG_START_TIME: 77687.00 SOD {21:34:47.00} UT, 65.3 [sec] since BAT Trigger Time SUN_POSTN: 190.46d {+12h 41m 50s} -4.50d {-04d 29' 56"} SUN_DIST: 123.22 [deg] Sun_angle= 9.4 [hr] (West of Sun) MOON_POSTN: 272.46d {+18h 09m 49s} -22.39d {-22d 23' 17"} MOON_DIST: 106.15 [deg] MOON_ILLUM: 42 [%] GAL_COORDS: 244.90,-57.45 [deg] galactic lon,lat of the burst (or transient) ECL_COORDS: 29.20,-54.80 [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 7.9 arcsec from the XRT position. COMMENTS: Result based on Genie data. COMMENTS: Notice generated automatically.
TITLE: GCN/SWIFT NOTICE NOTICE_DATE: Fri 04 Oct 19 21:42:25 UT NOTICE_TYPE: Swift-UVOT Image TRIGGER_NUM: 927839, Seg_Num: 0 POINT_RA: 49.166d {+03h 16m 40s} (J2000) POINT_DEC: -39.603d {-39d 36' 11"} (J2000) ROLL: 131.752d IMG_START_DATE: 18760 TJD; 277 DOY; 19/10/04 IMG_START_TIME: 77902.51 SOD {21:38:22.51} UT, 280.8 [sec] since BAT Trigger Time FILTER: 7, U EXPOSURE_ID: 591917926 X_OFFSET: 1080 [pixels] Y_OFFSET: 765 [pixels] WIDTH: 160 [pixels] HEIGHT: 160 [pixels] X_GRB_POS: 1240 Y_GRB_POS: 925 BINNING_INDEX: 1 IM_URL: sw00927839000msuni0304.fits SUN_POSTN: 190.46d {+12h 41m 50s} -4.50d {-04d 29' 56"} SUN_DIST: 123.27 [deg] Sun_angle= 9.4 [hr] (West of Sun) MOON_POSTN: 272.46d {+18h 09m 51s} -22.39d {-22d 23' 19"} MOON_DIST: 106.15 [deg] MOON_ILLUM: 42 [%] GAL_COORDS: 244.86,-57.49 [deg] galactic lon,lat of the pointing direction ECL_COORDS: 29.18,-54.76 [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: Fri 04 Oct 19 21:42:32 UT NOTICE_TYPE: Swift-UVOT Processed Image TRIGGER_NUM: 927839, Seg_Num: 0 POINT_RA: 49.166d {+03h 16m 40s} (J2000) POINT_DEC: -39.603d {-39d 36' 11"} (J2000) ROLL: 131.752d IMG_START_DATE: 18760 TJD; 277 DOY; 19/10/04 IMG_START_TIME: 77902.51 SOD {21:38:22.51} UT, 280.8 [sec] since BAT Trigger Time FILTER: 7, U EXPOSURE_ID: 591917926 X_OFFSET: 1080 [pixels] Y_OFFSET: 765 [pixels] WIDTH: 160 [pixels] HEIGHT: 160 [pixels] X_GRB_POS: 1240 Y_GRB_POS: 925 BINNING_INDEX: 1 IM_URL: sw00927839000msuni0304.fits SUN_POSTN: 190.46d {+12h 41m 50s} -4.50d {-04d 29' 56"} SUN_DIST: 123.27 [deg] Sun_angle= 9.4 [hr] (West of Sun) MOON_POSTN: 272.46d {+18h 09m 51s} -22.39d {-22d 23' 19"} MOON_DIST: 106.15 [deg] MOON_ILLUM: 42 [%] GAL_COORDS: 244.86,-57.49 [deg] galactic lon,lat of the pointing direction ECL_COORDS: 29.18,-54.76 [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) = 03h 16m 42s Dec(J2000) = -39d 36' 46"with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve shows multiple peaks with a total duration of about 40 sec. The peak count rate was ~9500 counts/sec (15-350 keV), at ~3 sec after the trigger.
RA(J2000) = 03h 16m 48.97s Dec(J2000) = -39d 38' 05.8"with an uncertainty of 3.9 arcseconds (radius, 90% containment). This location is 108 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. No spectrum from the promptly downlinked event data is yet available to determine the column density.
RA(J2000) = 03:16:49.10 = 49.20458 DEC(J2000) = -39:38:03.3 = -39.63425with a 90%-confidence error radius of about 0.62 arc sec. This position is 2.9 arc sec. from the center of the XRT error circle. The estimated magnitude is 18.00 with a 1-sigma error of about 0.14. No correction has been made for the expected extinction corresponding to E(B-V) of 0.02.
T-Tmid Date Time Expt. Ra Dec Mag ---------|---------------------|-------|-----------------|-----------------|------- 45 2019-10-04 21:34:21 10 (03h 16m 49.143s , -39d 38m 03.93s) 15.63The 5-sigma upper limit has been about 16.75mag The message may be cited.
TITLE: GCN/SWIFT NOTICE NOTICE_DATE: Fri 04 Oct 19 21:53:20 UT NOTICE_TYPE: Swift-XRT Position UPDATE TRIGGER_NUM: 927839, Seg_Num: 0 GRB_RA: 49.2038d {+03h 16m 48.91s} (J2000), 49.3880d {+03h 17m 33.11s} (current), 48.7378d {+03h 14m 57.07s} (1950) GRB_DEC: -39.6348d {-39d 38' 05.2"} (J2000), -39.5631d {-39d 33' 47.0"} (current), -39.8176d {-39d 49' 03.2"} (1950) GRB_ERROR: 3.7 [arcsec radius, statistical plus systematic, 90% containment] GRB_INTEN: 1.00e-10 [erg/cm2/sec] GRB_SIGNIF: 10.00 [sigma] IMG_START_DATE: 18760 TJD; 277 DOY; 19/10/04 IMG_START_TIME: 77830.00 SOD {21:37:10.00} UT, 208.3 [sec] since BAT Trigger Time TAM[0-3]: 100.00 100.00 100.00 100.00 AMPLIFIER: 1 WAVEFORM: 31 SUN_POSTN: 190.47d {+12h 41m 52s} -4.50d {-04d 30' 07"} SUN_DIST: 123.23 [deg] Sun_angle= 9.4 [hr] (West of Sun) MOON_POSTN: 272.57d {+18h 10m 16s} -22.40d {-22d 23' 43"} MOON_DIST: 106.09 [deg] MOON_ILLUM: 42 [%] GAL_COORDS: 244.90,-57.45 [deg] galactic lon,lat of the burst ECL_COORDS: 29.20,-54.80 [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: The probability that this is a serendipitous source in the COMMENTS: SPER window is 0.11% < P(seren) < 0.58%.
RA (J2000): 03h 16m 48.96s Dec (J2000): -39d 38' 06.1"with an uncertainty of 2.0 arcsec (radius, 90% confidence).
RA(J2000) = 03h 16m 47.9s Dec(J2000) = -39d 38' 15.0"with an uncertainty of 1.0 arcmin, (radius, sys+stat, 90% containment). The partial coding was 97%.
Galactic foreground: 1.9 x 10^20 cm^-2 Intrinsic column: 2 (+178, -2) x 10^20 cm^-2 at z=3.503 Photon index: 1.54 (+0.21, -0.14)The results of the XRT-team automatic analysis are available at http://www.swift.ac.uk/xrt_products/00927839.
R = 21.01 +/- 0.08 I = 19.91 +/- 0.08This flux is calibrated against several USNO-B1.0 objects near the GRB location but is not corrected for Galactic Extinction.
RA (J2000) = 03:16:49.10 = 49.20459 (deg.) Dec (J2000) = -39:38:03.9 = -39.63441 (deg.)with an estimated uncertainty of 0.43 arc sec. (radius, 90% confidence), consistent with the positions reported by LCO (Strausbaugh et al. GCN Circ. 25949), NOT (Heintz et al. GCN Circ. 25954), VLT/X-Shooter (D'Elia et al. GCN Circ. 25956), COATLI (Watson et al. GCN Circ. 25958), and GROND (Schady et al. GCN Circ. 25960).
Filter T_start(s) T_stop(s) Exp(s) Mag b 38697 38997 295 >20.42 uvm2 44827 45727 885 >20.25 u 294 387 91 >19.04 v 43916 44822 885 >20.07 uvw1 45734 46281 538 >19.96 uvw2 39915 40544 618 >20.09 white 82 232 147 18.01+-0.05 white 39003 39909 885 20.51+-0.13The magnitudes in the table are not corrected for the Galactic extinction due to the reddening of E(B-V) = 0.02 in the direction of the burst (Schlegel et al. 1998).