////////////////////////////////////////////////////////////////////// TITLE: GCN/FERMI NOTICE NOTICE_DATE: Sun 31 May 26 13:58:04 UT NOTICE_TYPE: Fermi-GBM Alert RECORD_NUM: 1 TRIGGER_NUM: 801928684 GRB_DATE: 21191 TJD; 151 DOY; 26/05/31 GRB_TIME: 50279.99 SOD {13:57:59.99} UT TRIGGER_SIGNIF: 5.1 [sigma] TRIGGER_DUR: 1.024 [sec] E_RANGE: 3-4 [chan] 47-291 [keV] ALGORITHM: 12 DETECTORS: 0,0,0, 0,0,0, 1,1,1, 0,0,0, 0,0, LC_URL: http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2026/bn260531582/quicklook/glg_lc_medres34_bn260531582.gif COMMENTS: Fermi-GBM Trigger Alert. COMMENTS: This trigger occurred at longitude,latitude = 140.82,-25.13 [deg]. COMMENTS: The LC_URL file will not be created until ~15 min after the trigger. ////////////////////////////////////////////////////////////////////// TITLE: GCN/FERMI NOTICE NOTICE_DATE: Sun 31 May 26 13:58:28 UT NOTICE_TYPE: Fermi-GBM Flight Position RECORD_NUM: 45 TRIGGER_NUM: 801928684 GRB_RA: 287.350d {+19h 09m 24s} (J2000), 287.659d {+19h 10m 38s} (current), 286.765d {+19h 07m 03s} (1950) GRB_DEC: +11.733d {+11d 43' 60"} (J2000), +11.778d {+11d 46' 39"} (current), +11.652d {+11d 39' 06"} (1950) GRB_ERROR: 12.42 [deg radius, statistical plus systematic] GRB_INTEN: 143 [cnts/sec] DATA_SIGNIF: 9.10 [sigma] INTEG_TIME: 2.048 [sec] GRB_DATE: 21191 TJD; 151 DOY; 26/05/31 GRB_TIME: 50279.99 SOD {13:57:59.99} UT GRB_PHI: 249.00 [deg] GRB_THETA: 50.00 [deg] DATA_TIME_SCALE: 2.0480 [sec] HARD_RATIO: 0.65 LOC_ALGORITHM: 3 (version number of) MOST_LIKELY: 77% GRB 2nd_MOST_LIKELY: 11% Distant Particles DETECTORS: 0,0,0, 0,0,0, 1,1,1, 0,0,0, 0,0, SUN_POSTN: 68.51d {+04h 34m 04s} +21.97d {+21d 57' 59"} SUN_DIST: 128.89 [deg] Sun_angle= 9.4 [hr] (West of Sun) MOON_POSTN: 250.26d {+16h 41m 03s} -27.15d {-27d 08' 55"} MOON_DIST: 53.21 [deg] MOON_ILLUM: 100 [%] GAL_COORDS: 45.41, 1.40 [deg] galactic lon,lat of the burst (or transient) ECL_COORDS: 290.61, 33.94 [deg] ecliptic lon,lat of the burst (or transient) LC_URL: http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2026/bn260531582/quicklook/glg_lc_medres34_bn260531582.gif COMMENTS: Fermi-GBM Flight-calculated Coordinates. COMMENTS: This trigger occurred at longitude,latitude = 140.82,-25.13 [deg]. COMMENTS: The LC_URL file will not be created until ~15 min after the trigger. ////////////////////////////////////////////////////////////////////// TITLE: GCN/FERMI NOTICE NOTICE_DATE: Sun 31 May 26 13:58:37 UT NOTICE_TYPE: Fermi-GBM Flight Position RECORD_NUM: 58 TRIGGER_NUM: 801928684 GRB_RA: 278.083d {+18h 32m 20s} (J2000), 278.380d {+18h 33m 31s} (current), 277.521d {+18h 30m 05s} (1950) GRB_DEC: +15.933d {+15d 55' 60"} (J2000), +15.954d {+15d 57' 16"} (current), +15.896d {+15d 53' 44"} (1950) GRB_ERROR: 7.60 [deg radius, statistical plus systematic] GRB_INTEN: 196 [cnts/sec] DATA_SIGNIF: 19.70 [sigma] INTEG_TIME: 4.096 [sec] GRB_DATE: 21191 TJD; 151 DOY; 26/05/31 GRB_TIME: 50279.99 SOD {13:57:59.99} UT GRB_PHI: 250.00 [deg] GRB_THETA: 40.00 [deg] DATA_TIME_SCALE: 4.0960 [sec] HARD_RATIO: 0.60 LOC_ALGORITHM: 3 (version number of) MOST_LIKELY: 86% GRB 2nd_MOST_LIKELY: 8% Cyg X-1 DETECTORS: 0,0,0, 0,0,0, 1,1,1, 0,0,0, 0,0, SUN_POSTN: 68.51d {+04h 34m 04s} +21.97d {+21d 57' 59"} SUN_DIST: 132.10 [deg] Sun_angle= 10.0 [hr] (West of Sun) MOON_POSTN: 250.27d {+16h 41m 04s} -27.15d {-27d 08' 56"} MOON_DIST: 51.01 [deg] MOON_ILLUM: 100 [%] GAL_COORDS: 45.17, 11.33 [deg] galactic lon,lat of the burst (or transient) ECL_COORDS: 280.03, 39.09 [deg] ecliptic lon,lat of the burst (or transient) LC_URL: http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2026/bn260531582/quicklook/glg_lc_medres34_bn260531582.gif COMMENTS: Fermi-GBM Flight-calculated Coordinates. COMMENTS: This trigger occurred at longitude,latitude = 140.82,-25.13 [deg]. COMMENTS: The LC_URL file will not be created until ~15 min after the trigger. ////////////////////////////////////////////////////////////////////// TITLE: GCN/FERMI NOTICE NOTICE_DATE: Sun 31 May 26 13:58:47 UT NOTICE_TYPE: Fermi-GBM Ground Position RECORD_NUM: 57 TRIGGER_NUM: 801928684 GRB_RA: 284.440d {+18h 57m 46s} (J2000), 284.765d {+18h 59m 04s} (current), 283.825d {+18h 55m 18s} (1950) GRB_DEC: +5.430d {+05d 25' 48"} (J2000), +5.467d {+05d 28' 01"} (current), +5.362d {+05d 21' 43"} (1950) GRB_ERROR: 3.77 [deg radius, statistical only] DATA_SIGNIF: 21.00 [sigma] DATA_INTERVAL: 4.096 [sec] GRB_DATE: 21191 TJD; 151 DOY; 26/05/31 GRB_TIME: 50279.99 SOD {13:57:59.99} UT GRB_PHI: 240.00 [deg] GRB_THETA: 50.00 [deg] E_RANGE: 44.032 - 279.965 [keV] LOC_ALGORITHM: 4173 (Gnd S/W Version number) SUN_POSTN: 68.52d {+04h 34m 04s} +21.97d {+21d 57' 59"} SUN_DIST: 135.14 [deg] Sun_angle= 9.6 [hr] (West of Sun) MOON_POSTN: 250.27d {+16h 41m 04s} -27.15d {-27d 08' 57"} MOON_DIST: 46.64 [deg] MOON_ILLUM: 100 [%] GAL_COORDS: 38.48, 1.07 [deg] galactic lon,lat of the burst (or transient) ECL_COORDS: 286.34, 28.05 [deg] ecliptic lon,lat of the burst (or transient) LC_URL: http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2026/bn260531582/quicklook/glg_lc_medres34_bn260531582.gif POS_MAP_URL: http://gcn.gsfc.nasa.gov/notices_f/gbm_gnd_loc_map_801928684.fits 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/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. ////////////////////////////////////////////////////////////////////// TITLE: GCN/FERMI NOTICE NOTICE_DATE: Sun 31 May 26 13:59:25 UT NOTICE_TYPE: Fermi-GBM Ground Position RECORD_NUM: 1 TRIGGER_NUM: 801928684 GRB_RA: 283.140d {+18h 52m 34s} (J2000), 283.465d {+18h 53m 52s} (current), 282.525d {+18h 50m 06s} (1950) GRB_DEC: +5.310d {+05d 18' 36"} (J2000), +5.344d {+05d 20' 38"} (current), +5.248d {+05d 14' 53"} (1950) GRB_ERROR: 3.59 [deg radius, statistical only] DATA_SIGNIF: 21.90 [sigma] DATA_INTERVAL: 7.168 [sec] GRB_DATE: 21191 TJD; 151 DOY; 26/05/31 GRB_TIME: 50279.99 SOD {13:57:59.99} UT GRB_PHI: 239.00 [deg] GRB_THETA: 49.00 [deg] E_RANGE: 44.032 - 279.965 [keV] LOC_ALGORITHM: 41731 (Gnd S/W Version number) SUN_POSTN: 68.52d {+04h 34m 04s} +21.97d {+21d 57' 59"} SUN_DIST: 136.22 [deg] Sun_angle= 9.7 [hr] (West of Sun) MOON_POSTN: 250.27d {+16h 41m 05s} -27.15d {-27d 08' 59"} MOON_DIST: 45.66 [deg] MOON_ILLUM: 100 [%] GAL_COORDS: 37.79, 2.17 [deg] galactic lon,lat of the burst (or transient) ECL_COORDS: 284.86, 28.07 [deg] ecliptic lon,lat of the burst (or transient) LC_URL: http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2026/bn260531582/quicklook/glg_lc_medres34_bn260531582.gif POS_MAP_URL: http://gcn.gsfc.nasa.gov/notices_f/gbm_gnd_loc_map_801928684.fits COMMENTS: Fermi-GBM Ground-calculated Coordinates. COMMENTS: In the LAT Field-of-view. 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. ////////////////////////////////////////////////////////////////////// TITLE: GCN/FERMI NOTICE NOTICE_DATE: Sun 31 May 26 13:59:36 UT NOTICE_TYPE: Fermi-GBM Ground Position RECORD_NUM: 2 TRIGGER_NUM: 801928684 GRB_RA: 283.200d {+18h 52m 48s} (J2000), 283.525d {+18h 54m 06s} (current), 282.584d {+18h 50m 20s} (1950) GRB_DEC: +5.230d {+05d 13' 48"} (J2000), +5.264d {+05d 15' 50"} (current), +5.168d {+05d 10' 04"} (1950) GRB_ERROR: 2.47 [deg radius, statistical only] DATA_SIGNIF: 27.30 [sigma] DATA_INTERVAL: 11.264 [sec] GRB_DATE: 21191 TJD; 151 DOY; 26/05/31 GRB_TIME: 50279.99 SOD {13:57:59.99} UT GRB_PHI: 239.00 [deg] GRB_THETA: 49.00 [deg] E_RANGE: 44.032 - 279.965 [keV] LOC_ALGORITHM: 41731 (Gnd S/W Version number) SUN_POSTN: 68.52d {+04h 34m 04s} +21.97d {+21d 57' 59"} SUN_DIST: 136.23 [deg] Sun_angle= 9.7 [hr] (West of Sun) MOON_POSTN: 250.27d {+16h 41m 06s} -27.15d {-27d 09' 00"} MOON_DIST: 45.64 [deg] MOON_ILLUM: 100 [%] GAL_COORDS: 37.74, 2.08 [deg] galactic lon,lat of the burst (or transient) ECL_COORDS: 284.92, 27.99 [deg] ecliptic lon,lat of the burst (or transient) LC_URL: http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2026/bn260531582/quicklook/glg_lc_medres34_bn260531582.gif POS_MAP_URL: http://gcn.gsfc.nasa.gov/notices_f/gbm_gnd_loc_map_801928684.fits COMMENTS: Fermi-GBM Ground-calculated Coordinates. COMMENTS: In the LAT Field-of-view. 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. ////////////////////////////////////////////////////////////////////// TITLE: GCN/FERMI NOTICE NOTICE_DATE: Sun 31 May 26 14:07:25 UT NOTICE_TYPE: Fermi-GBM Final Position RECORD_NUM: 0 TRIGGER_NUM: 801928684 GRB_RA: 282.630d {+18h 50m 31s} (J2000), 282.952d {+18h 51m 49s} (current), 282.020d {+18h 48m 05s} (1950) GRB_DEC: +6.410d {+06d 24' 36"} (J2000), +6.443d {+06d 26' 33"} (current), +6.351d {+06d 21' 02"} (1950) GRB_ERROR: 2.22 [deg radius, statistical only] GRB_DATE: 21191 TJD; 151 DOY; 26/05/31 GRB_TIME: 50279.99 SOD {13:57:59.99} UT GRB_PHI: 240.00 [deg] GRB_THETA: 48.00 [deg] E_RANGE: 44.032 - 279.965 [keV] LOC_ALGORITHM: 41731 (Gnd S/W Version number) SUN_POSTN: 68.52d {+04h 34m 05s} +21.97d {+21d 58' 02"} SUN_DIST: 135.90 [deg] Sun_angle= 9.7 [hr] (West of Sun) MOON_POSTN: 250.35d {+16h 41m 23s} -27.16d {-27d 09' 28"} MOON_DIST: 46.09 [deg] MOON_ILLUM: 100 [%] GAL_COORDS: 38.54, 3.12 [deg] galactic lon,lat of the burst (or transient) ECL_COORDS: 284.42, 29.22 [deg] ecliptic lon,lat of the burst (or transient) LC_URL: http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2026/bn260531582/quicklook/glg_lc_medres34_bn260531582.gif LOC_URL: http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2026/bn260531582/quicklook/glg_locplot_all_bn260531582.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: In the LAT Field-of-view. COMMENTS: This is likely a Long GRB.