(All information courtesy of the instrument teams.)
Previous IAU Circulars
TITLE: GCN/SWIFT NOTICE NOTICE_DATE: Fri 09 May 25 22:33:52 UT NOTICE_TYPE: Swift-BAT GRB Position TRIGGER_NUM: 1311764, Seg_Num: 0 GRB_RA: 46.455d {+03h 05m 49s} (J2000), 46.697d {+03h 06m 47s} (current), 45.977d {+03h 03m 54s} (1950) GRB_DEC: -38.853d {-38d 51' 11"} (J2000), -38.756d {-38d 45' 22"} (current), -39.046d {-39d 02' 45"} (1950) GRB_ERROR: 3.00 [arcmin radius, statistical only] GRB_INTEN: 3732 [cnts] Image_Peak=326 [image_cnts] TRIGGER_DUR: 1.024 [sec] TRIGGER_INDEX: 146 E_range: 25-100 keV BKG_INTEN: 16469 [cnts] BKG_TIME: 81196.42 SOD {22:33:16.42} UT BKG_DUR: 8 [sec] GRB_DATE: 20804 TJD; 129 DOY; 25/05/09 GRB_TIME: 81210.63 SOD {22:33:30.63} UT GRB_PHI: 53.92 [deg] GRB_THETA: 9.42 [deg] SOLN_STATUS: 0x20000003 RATE_SIGNIF: 33.15 [sigma] IMAGE_SIGNIF: 12.76 [sigma] MERIT_PARAMS: +1 +0 +0 +0 +2 +2 +0 +0 -55 +0 SUN_POSTN: 47.10d {+03h 08m 23s} +17.62d {+17d 36' 56"} SUN_DIST: 56.37 [deg] Sun_angle= 0.0 [hr] (West of Sun) MOON_POSTN: 197.13d {+13h 08m 31s} -9.42d {-09d 25' 18"} MOON_DIST: 124.52 [deg] MOON_ILLUM: 93 [%] GAL_COORDS: 244.28,-59.70 [deg] galactic lon,lat of the burst (or transient) ECL_COORDS: 26.57,-53.14 [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 = 225.15,20.24 [deg]. COMMENTS: COMMENTS: NOTE: This BAT event is temporally(1.0<100sec) coincident with the FERMI_GBM event (trignum=768522814).
TITLE: GCN/FERMI NOTICE NOTICE_DATE: Fri 09 May 25 22:33:58 UT NOTICE_TYPE: Fermi-GBM Flight Position RECORD_NUM: 46 TRIGGER_NUM: 768522814 GRB_RA: 56.033d {+03h 44m 08s} (J2000), 56.296d {+03h 45m 11s} (current), 55.516d {+03h 42m 04s} (1950) GRB_DEC: -28.083d {-28d 04' 59"} (J2000), -28.005d {-28d 00' 16"} (current), -28.240d {-28d 14' 23"} (1950) GRB_ERROR: 18.10 [deg radius, statistical plus systematic] GRB_INTEN: 87 [cnts/sec] DATA_SIGNIF: 9.40 [sigma] INTEG_TIME: 4.096 [sec] GRB_DATE: 20804 TJD; 129 DOY; 25/05/09 GRB_TIME: 81209.29 SOD {22:33:29.29} UT GRB_PHI: 46.00 [deg] GRB_THETA: 80.00 [deg] DATA_TIME_SCALE: 4.0960 [sec] HARD_RATIO: 1.09 LOC_ALGORITHM: 3 (version number of) MOST_LIKELY: 90% GRB 2nd_MOST_LIKELY: 5% Solar Flare DETECTORS: 0,1,1, 0,0,0, 0,0,0, 0,0,0, 0,0, SUN_POSTN: 47.10d {+03h 08m 23s} +17.62d {+17d 36' 56"} SUN_DIST: 46.48 [deg] Sun_angle= -0.6 [hr] (East of Sun) MOON_POSTN: 197.13d {+13h 08m 32s} -9.42d {-09d 25' 20"} MOON_DIST: 126.76 [deg] MOON_ILLUM: 93 [%] GAL_COORDS: 224.68,-51.93 [deg] galactic lon,lat of the burst (or transient) ECL_COORDS: 44.48,-46.30 [deg] ecliptic lon,lat of the burst (or transient) LC_URL: http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn250509940/quicklook/glg_lc_medres34_bn250509940.gif COMMENTS: Fermi-GBM Flight-calculated Coordinates. COMMENTS: This trigger occurred at longitude,latitude = 284.93,6.57 [deg]. COMMENTS: The LC_URL file will not be created until ~15 min after the trigger. COMMENTS: COMMENTS: NOTE: This GBM event is temporally(1.0<100sec) coincident with the SWIFT_BAT event (trignum=1311764).
TITLE: GCN/FERMI NOTICE NOTICE_DATE: Fri 09 May 25 22:34:07 UT NOTICE_TYPE: Fermi-GBM Flight Position RECORD_NUM: 59 TRIGGER_NUM: 768522814 GRB_RA: 44.583d {+02h 58m 20s} (J2000), 44.833d {+02h 59m 20s} (current), 44.092d {+02h 56m 22s} (1950) GRB_DEC: -37.300d {-37d 17' 59"} (J2000), -37.200d {-37d 11' 58"} (current), -37.499d {-37d 29' 56"} (1950) GRB_ERROR: 10.07 [deg radius, statistical plus systematic] GRB_INTEN: 151 [cnts/sec] DATA_SIGNIF: 13.90 [sigma] INTEG_TIME: 4.096 [sec] GRB_DATE: 20804 TJD; 129 DOY; 25/05/09 GRB_TIME: 81209.29 SOD {22:33:29.29} UT GRB_PHI: 55.00 [deg] GRB_THETA: 90.00 [deg] DATA_TIME_SCALE: 4.0960 [sec] HARD_RATIO: 1.07 LOC_ALGORITHM: 3 (version number of) MOST_LIKELY: 92% GRB 2nd_MOST_LIKELY: 4% Distant Particles DETECTORS: 0,1,1, 0,0,0, 0,0,0, 0,0,0, 0,0, SUN_POSTN: 47.10d {+03h 08m 23s} +17.62d {+17d 36' 56"} SUN_DIST: 54.86 [deg] Sun_angle= 0.2 [hr] (West of Sun) MOON_POSTN: 197.13d {+13h 08m 32s} -9.42d {-09d 25' 22"} MOON_DIST: 126.64 [deg] MOON_ILLUM: 93 [%] GAL_COORDS: 241.82,-61.46 [deg] galactic lon,lat of the burst (or transient) ECL_COORDS: 25.58,-51.09 [deg] ecliptic lon,lat of the burst (or transient) LC_URL: http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn250509940/quicklook/glg_lc_medres34_bn250509940.gif COMMENTS: Fermi-GBM Flight-calculated Coordinates. COMMENTS: This trigger occurred at longitude,latitude = 284.93,6.57 [deg]. COMMENTS: The LC_URL file will not be created until ~15 min after the trigger. COMMENTS: COMMENTS: NOTE: This GBM event is temporally(1.0<100sec) coincident with the SWIFT_BAT event (trignum=1311764).
TITLE: GCN/FERMI NOTICE NOTICE_DATE: Fri 09 May 25 22:34:17 UT NOTICE_TYPE: Fermi-GBM Ground Position RECORD_NUM: 58 TRIGGER_NUM: 768522814 GRB_RA: 43.590d {+02h 54m 22s} (J2000), 43.856d {+02h 55m 25s} (current), 43.066d {+02h 52m 16s} (1950) GRB_DEC: -31.290d {-31d 17' 23"} (J2000), -31.188d {-31d 11' 16"} (current), -31.493d {-31d 29' 32"} (1950) GRB_ERROR: 5.04 [deg radius, statistical only] DATA_SIGNIF: 17.40 [sigma] DATA_INTERVAL: 4.096 [sec] GRB_DATE: 20804 TJD; 129 DOY; 25/05/09 GRB_TIME: 81209.29 SOD {22:33:29.29} UT GRB_PHI: 49.00 [deg] GRB_THETA: 91.00 [deg] E_RANGE: 44.032 - 279.965 [keV] LOC_ALGORITHM: 4173 (Gnd S/W Version number) SUN_POSTN: 47.10d {+03h 08m 23s} +17.62d {+17d 36' 57"} SUN_DIST: 48.90 [deg] Sun_angle= 0.2 [hr] (West of Sun) MOON_POSTN: 197.13d {+13h 08m 32s} -9.42d {-09d 25' 24"} MOON_DIST: 131.99 [deg] MOON_ILLUM: 93 [%] GAL_COORDS: 229.18,-62.94 [deg] galactic lon,lat of the burst (or transient) ECL_COORDS: 28.35,-45.31 [deg] ecliptic lon,lat of the burst (or transient) LC_URL: http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn250509940/quicklook/glg_lc_medres34_bn250509940.gif POS_MAP_URL: http://gcn.gsfc.nasa.gov/notices_f/gbm_gnd_loc_map_768522814.fits COMMENTS: Fermi-GBM Ground-calculated Coordinates. COMMENTS: This Notice was ground-generated -- not flight-generated. COMMENTS: The LC_URL file will not be created/available until ~15 min after the trigger. COMMENTS: The POS_MAP_URL file will not be created/available until ~1.5 min after the notice. COMMENTS: COMMENTS: NOTE: This GBM event is temporally(1.0<100sec) coincident with the SWIFT_BAT event (trignum=1311764).
TITLE: GCN/FERMI NOTICE NOTICE_DATE: Fri 09 May 25 22:35:09 UT NOTICE_TYPE: Fermi-GBM Ground Position RECORD_NUM: 1 TRIGGER_NUM: 768522814 GRB_RA: 47.140d {+03h 08m 34s} (J2000), 47.391d {+03h 09m 34s} (current), 46.644d {+03h 06m 35s} (1950) GRB_DEC: -35.340d {-35d 20' 23"} (J2000), -35.244d {-35d 14' 38"} (current), -35.530d {-35d 31' 48"} (1950) GRB_ERROR: 3.58 [deg radius, statistical only] DATA_SIGNIF: 22.90 [sigma] DATA_INTERVAL: 12.288 [sec] GRB_DATE: 20804 TJD; 129 DOY; 25/05/09 GRB_TIME: 81209.29 SOD {22:33:29.29} UT GRB_PHI: 53.00 [deg] GRB_THETA: 88.00 [deg] E_RANGE: 44.032 - 279.965 [keV] LOC_ALGORITHM: 41731 (Gnd S/W Version number) SUN_POSTN: 47.10d {+03h 08m 23s} +17.62d {+17d 36' 57"} SUN_DIST: 52.86 [deg] Sun_angle= -0.0 [hr] (East of Sun) MOON_POSTN: 197.14d {+13h 08m 34s} -9.43d {-09d 25' 35"} MOON_DIST: 126.97 [deg] MOON_ILLUM: 93 [%] GAL_COORDS: 237.23,-59.73 [deg] galactic lon,lat of the burst (or transient) ECL_COORDS: 29.86,-50.22 [deg] ecliptic lon,lat of the burst (or transient) LC_URL: http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn250509940/quicklook/glg_lc_medres34_bn250509940.gif POS_MAP_URL: http://gcn.gsfc.nasa.gov/notices_f/gbm_gnd_loc_map_768522814.fits COMMENTS: Fermi-GBM Ground-calculated Coordinates. COMMENTS: This is likely a Long GRB. COMMENTS: This Notice was ground-generated -- not flight-generated. COMMENTS: The LC_URL file will not be created/available until ~15 min after the trigger. COMMENTS: The POS_MAP_URL file will not be created/available until ~1.5 min after the notice. COMMENTS: COMMENTS: NOTE: This GBM event is temporally(1.0<100sec) coincident with the SWIFT_BAT event (trignum=1311764).
TITLE: GCN/FERMI NOTICE NOTICE_DATE: Fri 09 May 25 22:34:56 UT NOTICE_TYPE: Fermi-GBM Ground Position RECORD_NUM: 0 TRIGGER_NUM: 768522814 GRB_RA: 45.720d {+03h 02m 53s} (J2000), 45.978d {+03h 03m 55s} (current), 45.210d {+03h 00m 51s} (1950) GRB_DEC: -33.330d {-33d 19' 47"} (J2000), -33.232d {-33d 13' 53"} (current), -33.525d {-33d 31' 30"} (1950) GRB_ERROR: 4.41 [deg radius, statistical only] DATA_SIGNIF: 18.40 [sigma] DATA_INTERVAL: 7.168 [sec] GRB_DATE: 20804 TJD; 129 DOY; 25/05/09 GRB_TIME: 81209.29 SOD {22:33:29.29} UT GRB_PHI: 51.00 [deg] GRB_THETA: 89.00 [deg] E_RANGE: 44.032 - 279.965 [keV] LOC_ALGORITHM: 41731 (Gnd S/W Version number) SUN_POSTN: 47.10d {+03h 08m 23s} +17.62d {+17d 36' 57"} SUN_DIST: 50.86 [deg] Sun_angle= 0.1 [hr] (West of Sun) MOON_POSTN: 197.14d {+13h 08m 33s} -9.43d {-09d 25' 33"} MOON_DIST: 129.28 [deg] MOON_ILLUM: 93 [%] GAL_COORDS: 233.38,-61.06 [deg] galactic lon,lat of the burst (or transient) ECL_COORDS: 29.52,-47.91 [deg] ecliptic lon,lat of the burst (or transient) LC_URL: http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn250509940/quicklook/glg_lc_medres34_bn250509940.gif POS_MAP_URL: http://gcn.gsfc.nasa.gov/notices_f/gbm_gnd_loc_map_768522814.fits COMMENTS: Fermi-GBM Ground-calculated Coordinates. COMMENTS: This is likely a Long GRB. COMMENTS: This Notice was ground-generated -- not flight-generated. COMMENTS: The LC_URL file will not be created/available until ~15 min after the trigger. COMMENTS: The POS_MAP_URL file will not be created/available until ~1.5 min after the notice. COMMENTS: COMMENTS: NOTE: This GBM event is temporally(1.0<100sec) coincident with the SWIFT_BAT event (trignum=1311764).
TITLE: GCN/FERMI NOTICE NOTICE_DATE: Fri 09 May 25 22:42:46 UT NOTICE_TYPE: Fermi-GBM Final Position RECORD_NUM: 0 TRIGGER_NUM: 768522814 GRB_RA: 45.960d {+03h 03m 50s} (J2000), 46.213d {+03h 04m 51s} (current), 45.461d {+03h 01m 51s} (1950) GRB_DEC: -35.340d {-35d 20' 23"} (J2000), -35.242d {-35d 14' 31"} (current), -35.534d {-35d 32' 03"} (1950) GRB_ERROR: 3.04 [deg radius, statistical only] GRB_DATE: 20804 TJD; 129 DOY; 25/05/09 GRB_TIME: 81209.29 SOD {22:33:29.29} UT GRB_PHI: 53.00 [deg] GRB_THETA: 89.00 [deg] E_RANGE: 44.032 - 279.965 [keV] LOC_ALGORITHM: 41731 (Gnd S/W Version number) SUN_POSTN: 47.10d {+03h 08m 24s} +17.62d {+17d 37' 02"} SUN_DIST: 52.87 [deg] Sun_angle= 0.1 [hr] (West of Sun) MOON_POSTN: 197.20d {+13h 08m 47s} -9.46d {-09d 27' 18"} MOON_DIST: 127.57 [deg] MOON_ILLUM: 93 [%] GAL_COORDS: 237.45,-60.68 [deg] galactic lon,lat of the burst (or transient) ECL_COORDS: 28.50,-49.81 [deg] ecliptic lon,lat of the burst (or transient) LC_URL: http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn250509940/quicklook/glg_lc_medres34_bn250509940.gif LOC_URL: http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn250509940/quicklook/glg_locplot_all_bn250509940.png COMMENTS: Fermi-GBM Final Position. COMMENTS: This Notice was ground-generated -- not flight-generated. COMMENTS: The LC_URL file should be available by the time this FINAL notice is produced. COMMENTS: This notice was generated completely by automated pipeline processing. COMMENTS: This is likely a Long GRB. COMMENTS: COMMENTS: NOTE: This GBM event is temporally(1.0<100sec) coincident with the SWIFT_BAT event (trignum=1311764).
TITLE: GCN/SWIFT NOTICE NOTICE_DATE: Fri 09 May 25 22:35:18 UT NOTICE_TYPE: Swift-XRT Processed Image TRIGGER_NUM: 1311764, Seg_Num: 0 GRB_RA: 46.4509d {+03h 05m 48.2s} (J2000), 46.6934d {+03h 06m 46.4s} (current), 45.9728d {+03h 03m 53.4s} (1950) GRB_DEC: -38.8412d {-38d 50' 28.3"} (J2000), -38.7442d {-38d 44' 39.0"} (current), -39.0339d {-39d 02' 01.8"} (1950) GRB_ERROR: 4.7 [arcsec, radius, statistical plus systematic] GRB_INTEN: 179 [cnts] IMG_START_DATE: 20804 TJD; 129 DOY; 25/05/09 IMG_START_TIME: 81281.71 SOD {22:34:41.71} UT, 71.1 [sec] since BAT Trigger Time CENTROID_X: 295.76, raw= 296 [pixels] CENTROID_Y: 304.68, raw= 305 [pixels] ROLL: 0.73 [deg] GAIN: 2 MODE: 3, Long Image mode WAVEFORM: 134 EXPO_TIME: 2.50 [sec] GRB_POS_XRT_Y: 14.11 GRB_POS_XRT_Z: -37.31 IMAGE_URL: sw01311764000msxps_rw.img SUN_POSTN: 47.10d {+03h 08m 23s} +17.62d {+17d 36' 57"} SUN_DIST: 56.36 [deg] Sun_angle= 0.0 [hr] (West of Sun) MOON_POSTN: 197.14d {+13h 08m 34s} -9.43d {-09d 25' 37"} MOON_DIST: 124.53 [deg] MOON_ILLUM: 93 [%] GAL_COORDS: 244.26,-59.70 [deg] galactic lon,lat of the burst ECL_COORDS: 26.58,-53.13 [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: Fri 09 May 25 22:35:16 UT NOTICE_TYPE: Swift-XRT Image TRIGGER_NUM: 1311764, Seg_Num: 0 GRB_RA: 46.4509d {+03h 05m 48.2s} (J2000), 46.6934d {+03h 06m 46.4s} (current), 45.9728d {+03h 03m 53.4s} (1950) GRB_DEC: -38.8412d {-38d 50' 28.3"} (J2000), -38.7442d {-38d 44' 39.0"} (current), -39.0339d {-39d 02' 01.8"} (1950) GRB_ERROR: 4.7 [arcsec, radius, statistical plus systematic] GRB_INTEN: 179 [cnts] IMG_START_DATE: 20804 TJD; 129 DOY; 25/05/09 IMG_START_TIME: 81281.71 SOD {22:34:41.71} UT, 71.1 [sec] since BAT Trigger Time CENTROID_X: 295.76, raw= 296 [pixels] CENTROID_Y: 304.68, raw= 305 [pixels] ROLL: 0.73 [deg] GAIN: 2 MODE: 3, Long Image mode WAVEFORM: 134 EXPO_TIME: 2.50 [sec] GRB_POS_XRT_Y: 14.11 GRB_POS_XRT_Z: -37.31 IMAGE_URL: sw01311764000msxps_rw.img SUN_POSTN: 47.10d {+03h 08m 23s} +17.62d {+17d 36' 57"} SUN_DIST: 56.36 [deg] Sun_angle= 0.0 [hr] (West of Sun) MOON_POSTN: 197.14d {+13h 08m 34s} -9.43d {-09d 25' 37"} MOON_DIST: 124.53 [deg] MOON_ILLUM: 93 [%] GAL_COORDS: 244.26,-59.70 [deg] galactic lon,lat of the burst ECL_COORDS: 26.58,-53.13 [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: Fri 09 May 25 22:35:06 UT NOTICE_TYPE: Swift-XRT Position TRIGGER_NUM: 1311764, Seg_Num: 0 GRB_RA: 46.4509d {+03h 05m 48.21s} (J2000), 46.6934d {+03h 06m 46.40s} (current), 45.9728d {+03h 03m 53.46s} (1950) GRB_DEC: -38.8412d {-38d 50' 28.3"} (J2000), -38.7442d {-38d 44' 39.0"} (current), -39.0339d {-39d 02' 01.8"} (1950) GRB_ERROR: 4.8 [arcsec radius, statistical plus systematic, 90% containment] GRB_INTEN: 7.21e-09 [erg/cm2/sec] GRB_SIGNIF: 13.37 [sigma] IMG_START_DATE: 20804 TJD; 129 DOY; 25/05/09 IMG_START_TIME: 81281.71 SOD {22:34:41.71} UT, 71.1 [sec] since BAT Trigger Time TAM[0-3]: 327.65 237.12 261.75 243.32 AMPLIFIER: 2 WAVEFORM: 134 SUN_POSTN: 47.10d {+03h 08m 23s} +17.62d {+17d 36' 57"} SUN_DIST: 56.36 [deg] Sun_angle= 0.0 [hr] (West of Sun) MOON_POSTN: 197.14d {+13h 08m 34s} -9.43d {-09d 25' 35"} MOON_DIST: 124.53 [deg] MOON_ILLUM: 93 [%] GAL_COORDS: 244.26,-59.70 [deg] galactic lon,lat of the burst ECL_COORDS: 26.58,-53.13 [deg] ecliptic lon,lat of the burst COMMENTS: SWIFT-XRT Coordinates. COMMENTS: The XRT position is 0.75 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: Fri 09 May 25 22:36:54 UT NOTICE_TYPE: Swift-BAT GRB Lightcurve TRIGGER_NUM: 1311764, Seg_Num: 0 GRB_RA: 46.455d {+03h 05m 49s} (J2000), 46.697d {+03h 06m 47s} (current), 45.977d {+03h 03m 54s} (1950) GRB_DEC: -38.853d {-38d 51' 11"} (J2000), -38.756d {-38d 45' 22"} (current), -39.046d {-39d 02' 45"} (1950) GRB_DATE: 20804 TJD; 129 DOY; 25/05/09 GRB_TIME: 81210.63 SOD {22:33:30.63} UT TRIGGER_INDEX: 146 GRB_PHI: 53.92 [deg] GRB_THETA: 9.42 [deg] DELTA_TIME: 19.00 [sec] TRIGGER_DUR: 1.024 [sec] SOLN_STATUS: 0x3 RATE_SIGNIF: 33.15 [sigma] IMAGE_SIGNIF: 12.76 [sigma] LC_URL: sw01311764000msb.lc SUN_POSTN: 47.10d {+03h 08m 23s} +17.62d {+17d 36' 58"} SUN_DIST: 56.37 [deg] Sun_angle= 0.0 [hr] (West of Sun) MOON_POSTN: 197.15d {+13h 08m 37s} -9.43d {-09d 26' 00"} MOON_DIST: 124.52 [deg] MOON_ILLUM: 93 [%] GAL_COORDS: 244.28,-59.70 [deg] galactic lon,lat of the burst (or transient) ECL_COORDS: 26.57,-53.14 [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 = 225.15,20.24 [deg].
TITLE: GCN/SWIFT NOTICE NOTICE_DATE: Fri 09 May 25 22:40:05 UT NOTICE_TYPE: Swift-UVOT Source List TRIGGER_NUM: 1311764, Seg_Num: 0 POINT_RA: 46.456d {+03h 05m 49s} (J2000) POINT_DEC: -38.852d {-38d 51' 04"} (J2000) POINT_ROLL: 0.729d IMG_START_DATE: 20804 TJD; 129 DOY; 25/05/09 IMG_START_TIME: 81291.11 SOD {22:34:51.11} UT, 80.5 [sec] since BAT Trigger Time FILTER: 10, White BKG_MEAN: 7.131 N_STARS: 15 X_OFFSET: 464 [pixels] Y_OFFSET: 560 [pixels] X_MAX: 1423 [pixels] Y_MAX: 1519 [pixels] DET_THRESH: 23 PHOTO_THRESH: 14 SL_URL: sw01311764000msufc0080.fits SUN_POSTN: 47.10d {+03h 08m 24s} +17.62d {+17d 37' 00"} SUN_DIST: 56.37 [deg] Sun_angle= 0.0 [hr] (West of Sun) MOON_POSTN: 197.18d {+13h 08m 43s} -9.45d {-09d 26' 42"} MOON_DIST: 124.52 [deg] MOON_ILLUM: 93 [%] GAL_COORDS: 244.28,-59.70 [deg] galactic lon,lat of the pointing direction ECL_COORDS: 26.58,-53.14 [deg] ecliptic lon,lat of the pointing direction COMMENTS: SWIFT-UVOT Source List.
TITLE: GCN/SWIFT NOTICE NOTICE_DATE: Fri 09 May 25 22:49:14 UT NOTICE_TYPE: Swift-UVOT Source List TRIGGER_NUM: 1311764, Seg_Num: 0 POINT_RA: 46.455d {+03h 05m 49s} (J2000) POINT_DEC: -38.851d {-38d 51' 03"} (J2000) POINT_ROLL: 0.730d IMG_START_DATE: 20804 TJD; 129 DOY; 25/05/09 IMG_START_TIME: 81503.21 SOD {22:38:23.21} UT, 292.6 [sec] since BAT Trigger Time FILTER: 7, U BKG_MEAN: 2.708 N_STARS: 7 X_OFFSET: 527 [pixels] Y_OFFSET: 501 [pixels] X_MAX: 1486 [pixels] Y_MAX: 1460 [pixels] DET_THRESH: 14 PHOTO_THRESH: 7 SL_URL: sw01311764000msufc0292.fits SUN_POSTN: 47.11d {+03h 08m 25s} +17.62d {+17d 37' 06"} SUN_DIST: 56.37 [deg] Sun_angle= 0.0 [hr] (West of Sun) MOON_POSTN: 197.25d {+13h 08m 59s} -9.48d {-09d 28' 45"} MOON_DIST: 124.52 [deg] MOON_ILLUM: 93 [%] GAL_COORDS: 244.28,-59.70 [deg] galactic lon,lat of the pointing direction ECL_COORDS: 26.57,-53.14 [deg] ecliptic lon,lat of the pointing direction COMMENTS: SWIFT-UVOT Source List.
RA(J2000) = 03h 05m 49s Dec(J2000) = -38d 51' 11"with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve showed a multi peak structure with a duration of about 60 sec. The peak count rate was ~2800 counts/sec (15-350 keV), at ~0 sec after the trigger.
RA(J2000) = 03h 05m 48.08s Dec(J2000) = -38d 50' 30.2"with an uncertainty of 3.6 arcseconds (radius, 90% containment). This location is 42 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 https://www.swift.ac.uk/sper.
TITLE: GCN/SWIFT NOTICE NOTICE_DATE: Fri 09 May 25 22:49:23 UT NOTICE_TYPE: Swift-UVOT Processed Source List TRIGGER_NUM: 1311764, Seg_Num: 0 POINT_RA: 46.455d {+03h 05m 49s} (J2000) POINT_DEC: -38.851d {-38d 51' 03"} (J2000) POINT_ROLL: 0.730d IMG_START_DATE: 20804 TJD; 129 DOY; 25/05/09 IMG_START_TIME: 81503.21 SOD {22:38:23.21} UT, 292.6 [sec] since BAT Trigger Time FILTER: 7, U BKG_MEAN: 2.708 N_STARS: 7 X_OFFSET: 527 [pixels] Y_OFFSET: 501 [pixels] X_MAX: 1486 [pixels] Y_MAX: 1460 [pixels] DET_THRESH: 14 PHOTO_THRESH: 7 SL_URL: sw01311764000msufc0292.fits SUN_POSTN: 47.11d {+03h 08m 25s} +17.62d {+17d 37' 06"} SUN_DIST: 56.37 [deg] Sun_angle= 0.0 [hr] (West of Sun) MOON_POSTN: 197.25d {+13h 08m 59s} -9.48d {-09d 28' 47"} MOON_DIST: 124.52 [deg] MOON_ILLUM: 93 [%] GAL_COORDS: 244.28,-59.70 [deg] galactic lon,lat of the pointing direction ECL_COORDS: 26.57,-53.14 [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 09 May 25 22:49:44 UT NOTICE_TYPE: Swift-XRT Position UPDATE TRIGGER_NUM: 1311764, Seg_Num: 0 GRB_RA: 46.4495d {+03h 05m 47.88s} (J2000), 46.6920d {+03h 06m 46.07s} (current), 45.9714d {+03h 03m 53.12s} (1950) GRB_DEC: -38.8413d {-38d 50' 28.6"} (J2000), -38.7443d {-38d 44' 39.3"} (current), -39.0340d {-39d 02' 02.2"} (1950) GRB_ERROR: 1.9 [arcsec radius, statistical plus systematic, 90% containment] GRB_INTEN: 1.00e-10 [erg/cm2/sec] GRB_SIGNIF: 10.00 [sigma] IMG_START_DATE: 20804 TJD; 129 DOY; 25/05/09 IMG_START_TIME: 81446.00 SOD {22:37:26.00} UT, 235.4 [sec] since BAT Trigger Time TAM[0-3]: 100.00 100.00 100.00 100.00 AMPLIFIER: 1 WAVEFORM: 31 SUN_POSTN: 47.11d {+03h 08m 25s} +17.62d {+17d 37' 07"} SUN_DIST: 56.36 [deg] Sun_angle= 0.0 [hr] (West of Sun) MOON_POSTN: 197.25d {+13h 09m 00s} -9.48d {-09d 28' 52"} MOON_DIST: 124.53 [deg] MOON_ILLUM: 93 [%] GAL_COORDS: 244.26,-59.70 [deg] galactic lon,lat of the burst ECL_COORDS: 26.58,-53.13 [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: Fri 09 May 25 22:50:43 UT NOTICE_TYPE: Swift-UVOT Processed Image TRIGGER_NUM: 1311764, Seg_Num: 0 POINT_RA: 46.455d {+03h 05m 49s} (J2000) POINT_DEC: -38.851d {-38d 51' 03"} (J2000) ROLL: 0.730d IMG_START_DATE: 20804 TJD; 129 DOY; 25/05/09 IMG_START_TIME: 81503.21 SOD {22:38:23.21} UT, 292.6 [sec] since BAT Trigger Time FILTER: 7, U EXPOSURE_ID: 768523138 X_OFFSET: 847 [pixels] Y_OFFSET: 821 [pixels] WIDTH: 160 [pixels] HEIGHT: 160 [pixels] X_GRB_POS: 1007 Y_GRB_POS: 981 BINNING_INDEX: 1 IM_URL: sw01311764000msuni0328.fits SUN_POSTN: 47.11d {+03h 08m 26s} +17.62d {+17d 37' 07"} SUN_DIST: 56.37 [deg] Sun_angle= 0.0 [hr] (West of Sun) MOON_POSTN: 197.26d {+13h 09m 02s} -9.48d {-09d 29' 05"} MOON_DIST: 124.52 [deg] MOON_ILLUM: 93 [%] GAL_COORDS: 244.28,-59.70 [deg] galactic lon,lat of the pointing direction ECL_COORDS: 26.57,-53.14 [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 09 May 25 22:50:37 UT NOTICE_TYPE: Swift-UVOT Image TRIGGER_NUM: 1311764, Seg_Num: 0 POINT_RA: 46.455d {+03h 05m 49s} (J2000) POINT_DEC: -38.851d {-38d 51' 03"} (J2000) ROLL: 0.730d IMG_START_DATE: 20804 TJD; 129 DOY; 25/05/09 IMG_START_TIME: 81503.21 SOD {22:38:23.21} UT, 292.6 [sec] since BAT Trigger Time FILTER: 7, U EXPOSURE_ID: 768523138 X_OFFSET: 847 [pixels] Y_OFFSET: 821 [pixels] WIDTH: 160 [pixels] HEIGHT: 160 [pixels] X_GRB_POS: 1007 Y_GRB_POS: 981 BINNING_INDEX: 1 IM_URL: sw01311764000msuni0328.fits SUN_POSTN: 47.11d {+03h 08m 26s} +17.62d {+17d 37' 07"} SUN_DIST: 56.37 [deg] Sun_angle= 0.0 [hr] (West of Sun) MOON_POSTN: 197.26d {+13h 09m 01s} -9.48d {-09d 29' 04"} MOON_DIST: 124.52 [deg] MOON_ILLUM: 93 [%] GAL_COORDS: 244.28,-59.70 [deg] galactic lon,lat of the pointing direction ECL_COORDS: 26.57,-53.14 [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).
Tmid-T0 | Site |Filt.| Expt. | Limit| Comment _________|_____________________|_____|_______|______|________ 1423 | MASTER-OAFA | C | 180 | 18.2 | 1609 | MASTER-OAFA | C | 180 | 18.4 |Filter C is a clear (unfiltred) band.
Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment _________|_____________________|_____________________|____________________________________|_____|_______|_______|________ 70 | 2025-05-09 22:34:33 | MASTER-OAFA | (03h 18m 00.28s , -38d 23m 19.1s) | C | 10 | 14.1 | 104 | 2025-05-09 22:35:03 | MASTER-OAFA | (03h 18m 00.24s , -38d 23m 19.1s) | C | 20 | 14.5 | 138 | 2025-05-09 22:35:42 | MASTER-OAFA | (03h 18m 00.14s , -38d 23m 18.9s) | C | 10 | 14.4 | 174 | 2025-05-09 22:36:18 | MASTER-OAFA | (03h 18m 00.11s , -38d 23m 18.5s) | C | 10 | 14.4 | 215 | 2025-05-09 22:36:53 | MASTER-OAFA | (03h 18m 00.10s , -38d 23m 18.6s) | C | 20 | 14.7 | 265 | 2025-05-09 22:37:39 | MASTER-OAFA | (03h 18m 00.12s , -38d 23m 19.3s) | C | 30 | 14.8 | 865 | 2025-05-09 22:46:44 | MASTER-OAFA | (03h 18m 00.32s , -38d 23m 28.0s) | C | 140 | 14.8 | 1041 | 2025-05-09 22:49:30 | MASTER-OAFA | (03h 18m 00.52s , -38d 23m 31.2s) | C | 160 | 16.3 | 1227 | 2025-05-09 22:52:36 | MASTER-OAFA | (03h 18m 00.73s , -38d 23m 34.3s) | C | 160 | 16.5 | 1414 | 2025-05-09 22:55:42 | MASTER-OAFA | (03h 18m 01.03s , -38d 23m 38.0s) | C | 160 | 17.0 | 1424 | 2025-05-09 22:55:43 | MASTER-OAFA | (03h 06m 24.43s , -38d 43m 44.4s) | C | 180 | 18.2 | 1600 | 2025-05-09 22:58:49 | MASTER-OAFA | (03h 18m 01.35s , -38d 23m 42.3s) | C | 160 | 17.1 | 1610 | 2025-05-09 22:58:49 | MASTER-OAFA | (03h 06m 24.67s , -38d 43m 47.0s) | C | 180 | 18.4 | 1786 | 2025-05-09 23:01:55 | MASTER-OAFA | (03h 18m 01.74s , -38d 23m 46.7s) | C | 160 | 17.1 | 1796 | 2025-05-09 23:01:55 | MASTER-OAFA | (03h 06m 24.96s , -38d 43m 50.0s) | C | 180 | 18.3 | 1972 | 2025-05-09 23:05:01 | MASTER-OAFA | (03h 18m 02.05s , -38d 23m 50.9s) | C | 160 | 17.1 | 1983 | 2025-05-09 23:05:02 | MASTER-OAFA | (03h 06m 25.27s , -38d 43m 53.2s) | C | 180 | 18.2 | 2159 | 2025-05-09 23:08:08 | MASTER-OAFA | (03h 18m 02.30s , -38d 23m 55.2s) | C | 160 | 17.1 | 2169 | 2025-05-09 23:08:08 | MASTER-OAFA | (03h 06m 25.58s , -38d 43m 56.5s) | C | 180 | 18.1 | 2356 | 2025-05-09 23:11:14 | MASTER-OAFA | (03h 06m 25.97s , -38d 44m 00.1s) | C | 180 | 18.0 | 2531 | 2025-05-09 23:14:20 | MASTER-OAFA | (03h 18m 02.98s , -38d 24m 03.8s) | C | 160 | 17.1 | 2542 | 2025-05-09 23:14:20 | MASTER-OAFA | (03h 06m 26.35s , -38d 44m 03.6s) | C | 180 | 18.0 | 2718 | 2025-05-09 23:17:26 | MASTER-OAFA | (03h 18m 03.37s , -38d 24m 09.0s) | C | 160 | 17.2 | 2728 | 2025-05-09 23:17:27 | MASTER-OAFA | (03h 06m 26.66s , -38d 44m 06.7s) | C | 180 | 18.0 | 2904 | 2025-05-09 23:20:33 | MASTER-OAFA | (03h 18m 03.73s , -38d 24m 14.1s) | C | 160 | 17.1 | 2914 | 2025-05-09 23:20:33 | MASTER-OAFA | (03h 06m 26.94s , -38d 44m 08.8s) | C | 180 | 17.6 | 3090 | 2025-05-09 23:23:39 | MASTER-OAFA | (03h 18m 04.07s , -38d 24m 19.9s) | C | 160 | 16.9 | 3100 | 2025-05-09 23:23:39 | MASTER-OAFA | (03h 06m 27.22s , -38d 44m 12.4s) | C | 180 | 17.4 |Filter C is a clear (unfiltred) band.
RA (J2000) = 03 05 47.90 Dec (J2000) = -38 50 28.6with an uncertainty of 1.9 arcseconds (radius, 90% confidence). Analysis of the promptly available data is online at http://www.swift.ac.uk/sper/1311764.
TITLE: GCN/SWIFT NOTICE NOTICE_DATE: Fri 09 May 25 22:40:21 UT NOTICE_TYPE: Swift-UVOT Processed Source List TRIGGER_NUM: 1311764, Seg_Num: 0 POINT_RA: 46.456d {+03h 05m 49s} (J2000) POINT_DEC: -38.852d {-38d 51' 04"} (J2000) POINT_ROLL: 0.729d IMG_START_DATE: 20804 TJD; 129 DOY; 25/05/09 IMG_START_TIME: 81291.11 SOD {22:34:51.11} UT, 80.5 [sec] since BAT Trigger Time FILTER: 10, White BKG_MEAN: 7.131 N_STARS: 15 X_OFFSET: 464 [pixels] Y_OFFSET: 560 [pixels] X_MAX: 1423 [pixels] Y_MAX: 1519 [pixels] DET_THRESH: 23 PHOTO_THRESH: 14 SL_URL: sw01311764000msufc0080.fits SUN_POSTN: 47.10d {+03h 08m 24s} +17.62d {+17d 37' 01"} SUN_DIST: 56.37 [deg] Sun_angle= 0.0 [hr] (West of Sun) MOON_POSTN: 197.18d {+13h 08m 43s} -9.45d {-09d 26' 45"} MOON_DIST: 124.52 [deg] MOON_ILLUM: 93 [%] GAL_COORDS: 244.28,-59.70 [deg] galactic lon,lat of the pointing direction ECL_COORDS: 26.58,-53.14 [deg] ecliptic lon,lat of the pointing direction COMMENTS: SWIFT-UVOT Processed Source List. COMMENTS: All 4 attachments are included.
RA (J2000): 03h 05m 47.92s Dec (J2000): -38d 50' 31.2"with an uncertainty of 2.3 arcsec (radius, 90% confidence).
Total column: 6.0 (+1.0, -0.9) x 10^21 cm^-2 Galactic foreground: 2.0 x 10^20 cm^-2 Excess significance: 10.7 sigma Photon index: 2.13 (+/-0.15)If the light curve continues to decay with a power-law decay index of 1.44, the count rate at T+24 hours will be 9.5 x 10^-3 count s^-1, corresponding to an observed (unabsorbed) 0.3-10 keV flux of 3.9 x 10^-13 (7.1 x 10^-13) erg cm^-2 s^-1.
RA(J2000) = 03h 05m 48.3s Dec(J2000) = -38d 51' 15.1"with an uncertainty of 1.0 arcmin, (radius, sys+stat, 90% containment). The partial coding was 96%.