////////////////////////////////////////////////////////////////////// TITLE: GCN/FERMI NOTICE NOTICE_DATE: Tue 21 Apr 26 08:25:25 UT NOTICE_TYPE: Fermi-GBM Alert RECORD_NUM: 1 TRIGGER_NUM: 798452724 GRB_DATE: 21151 TJD; 111 DOY; 26/04/21 GRB_TIME: 30319.59 SOD {08:25:19.59} UT TRIGGER_SIGNIF: 5.2 [sigma] TRIGGER_DUR: 2.048 [sec] E_RANGE: 3-4 [chan] 47-291 [keV] ALGORITHM: 15 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/bn260421351/quicklook/glg_lc_medres34_bn260421351.gif COMMENTS: Fermi-GBM Trigger Alert. COMMENTS: This trigger occurred at longitude,latitude = 63.80,8.77 [deg]. COMMENTS: The LC_URL file will not be created until ~15 min after the trigger. ////////////////////////////////////////////////////////////////////// TITLE: GCN/FERMI NOTICE NOTICE_DATE: Tue 21 Apr 26 08:25:38 UT NOTICE_TYPE: Fermi-GBM Flight Position RECORD_NUM: 47 TRIGGER_NUM: 798452724 GRB_RA: 292.317d {+19h 29m 16s} (J2000), 292.382d {+19h 29m 32s} (current), 292.191d {+19h 28m 46s} (1950) GRB_DEC: +63.450d {+63d 27' 00"} (J2000), +63.506d {+63d 30' 20"} (current), +63.345d {+63d 20' 40"} (1950) GRB_ERROR: 17.25 [deg radius, statistical plus systematic] GRB_INTEN: 72 [cnts/sec] DATA_SIGNIF: 7.20 [sigma] INTEG_TIME: 4.096 [sec] GRB_DATE: 21151 TJD; 111 DOY; 26/04/21 GRB_TIME: 30319.59 SOD {08:25:19.59} UT GRB_PHI: 255.00 [deg] GRB_THETA: 60.00 [deg] DATA_TIME_SCALE: 4.0960 [sec] HARD_RATIO: 1.78 LOC_ALGORITHM: 3 (version number of) MOST_LIKELY: 81% GRB 2nd_MOST_LIKELY: 13% Generic SGR DETECTORS: 0,0,0, 0,0,0, 1,1,1, 0,0,0, 0,0, SUN_POSTN: 29.11d {+01h 56m 27s} +11.91d {+11d 54' 34"} SUN_DIST: 82.33 [deg] Sun_angle= 6.4 [hr] (West of Sun) MOON_POSTN: 84.05d {+05h 36m 13s} +28.25d {+28d 14' 50"} MOON_DIST: 85.55 [deg] MOON_ILLUM: 20 [%] GAL_COORDS: 94.94, 20.03 [deg] galactic lon,lat of the burst (or transient) ECL_COORDS: 352.10, 80.13 [deg] ecliptic lon,lat of the burst (or transient) LC_URL: http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2026/bn260421351/quicklook/glg_lc_medres34_bn260421351.gif COMMENTS: Fermi-GBM Flight-calculated Coordinates. COMMENTS: This trigger occurred at longitude,latitude = 63.80,8.77 [deg]. COMMENTS: The LC_URL file will not be created until ~15 min after the trigger. ////////////////////////////////////////////////////////////////////// TITLE: GCN/FERMI NOTICE NOTICE_DATE: Tue 21 Apr 26 08:25:47 UT NOTICE_TYPE: Fermi-GBM Flight Position RECORD_NUM: 58 TRIGGER_NUM: 798452724 GRB_RA: 296.700d {+19h 46m 48s} (J2000), 296.708d {+19h 46m 50s} (current), 296.682d {+19h 46m 44s} (1950) GRB_DEC: +68.283d {+68d 16' 60"} (J2000), +68.349d {+68d 20' 57"} (current), +68.158d {+68d 09' 30"} (1950) GRB_ERROR: 10.37 [deg radius, statistical plus systematic] GRB_INTEN: 103 [cnts/sec] DATA_SIGNIF: 10.20 [sigma] INTEG_TIME: 4.096 [sec] GRB_DATE: 21151 TJD; 111 DOY; 26/04/21 GRB_TIME: 30319.59 SOD {08:25:19.59} UT GRB_PHI: 254.00 [deg] GRB_THETA: 55.00 [deg] DATA_TIME_SCALE: 4.0960 [sec] HARD_RATIO: 1.45 LOC_ALGORITHM: 3 (version number of) MOST_LIKELY: 97% GRB 2nd_MOST_LIKELY: 1% Generic SGR DETECTORS: 0,0,0, 0,0,0, 1,1,1, 0,0,0, 0,0, SUN_POSTN: 29.11d {+01h 56m 27s} +11.91d {+11d 54' 34"} SUN_DIST: 79.83 [deg] Sun_angle= 6.2 [hr] (West of Sun) MOON_POSTN: 84.06d {+05h 36m 14s} +28.25d {+28d 14' 50"} MOON_DIST: 80.43 [deg] MOON_ILLUM: 20 [%] GAL_COORDS: 100.43, 20.17 [deg] galactic lon,lat of the burst (or transient) ECL_COORDS: 21.73, 79.69 [deg] ecliptic lon,lat of the burst (or transient) LC_URL: http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2026/bn260421351/quicklook/glg_lc_medres34_bn260421351.gif COMMENTS: Fermi-GBM Flight-calculated Coordinates. COMMENTS: This trigger occurred at longitude,latitude = 63.80,8.77 [deg]. COMMENTS: The LC_URL file will not be created until ~15 min after the trigger. ////////////////////////////////////////////////////////////////////// TITLE: GCN/FERMI NOTICE NOTICE_DATE: Tue 21 Apr 26 08:25:57 UT NOTICE_TYPE: Fermi-GBM Ground Position RECORD_NUM: 57 TRIGGER_NUM: 798452724 GRB_RA: 290.900d {+19h 23m 36s} (J2000), 290.994d {+19h 23m 59s} (current), 290.720d {+19h 22m 53s} (1950) GRB_DEC: +60.580d {+60d 34' 48"} (J2000), +60.632d {+60d 37' 56"} (current), +60.481d {+60d 28' 52"} (1950) GRB_ERROR: 4.29 [deg radius, statistical only] DATA_SIGNIF: 12.20 [sigma] DATA_INTERVAL: 4.096 [sec] GRB_DATE: 21151 TJD; 111 DOY; 26/04/21 GRB_TIME: 30319.59 SOD {08:25:19.59} UT GRB_PHI: 256.00 [deg] GRB_THETA: 63.00 [deg] E_RANGE: 44.032 - 279.965 [keV] LOC_ALGORITHM: 4173 (Gnd S/W Version number) SUN_POSTN: 29.11d {+01h 56m 27s} +11.91d {+11d 54' 34"} SUN_DIST: 83.57 [deg] Sun_angle= 6.5 [hr] (West of Sun) MOON_POSTN: 84.06d {+05h 36m 14s} +28.25d {+28d 14' 51"} MOON_DIST: 88.43 [deg] MOON_ILLUM: 20 [%] GAL_COORDS: 91.84, 19.64 [deg] galactic lon,lat of the burst (or transient) ECL_COORDS: 336.96, 79.02 [deg] ecliptic lon,lat of the burst (or transient) LC_URL: http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2026/bn260421351/quicklook/glg_lc_medres34_bn260421351.gif POS_MAP_URL: http://gcn.gsfc.nasa.gov/notices_f/gbm_gnd_loc_map_798452724.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. ////////////////////////////////////////////////////////////////////// TITLE: GCN/FERMI NOTICE NOTICE_DATE: Tue 21 Apr 26 08:25:57 UT NOTICE_TYPE: Fermi-GBM Flight Position RECORD_NUM: 69 TRIGGER_NUM: 798452724 GRB_RA: 296.383d {+19h 45m 32s} (J2000), 296.383d {+19h 45m 32s} (current), 296.382d {+19h 45m 32s} (1950) GRB_DEC: +68.733d {+68d 43' 60"} (J2000), +68.798d {+68d 47' 54"} (current), +68.610d {+68d 36' 35"} (1950) GRB_ERROR: 5.57 [deg radius, statistical plus systematic] GRB_INTEN: 387 [cnts/sec] DATA_SIGNIF: 27.60 [sigma] INTEG_TIME: 2.048 [sec] GRB_DATE: 21151 TJD; 111 DOY; 26/04/21 GRB_TIME: 30319.59 SOD {08:25:19.59} UT GRB_PHI: 254.00 [deg] GRB_THETA: 55.00 [deg] DATA_TIME_SCALE: 2.0480 [sec] HARD_RATIO: 0.94 LOC_ALGORITHM: 3 (version number of) MOST_LIKELY: 96% GRB 2nd_MOST_LIKELY: 1% Cyg X-1 DETECTORS: 0,0,0, 0,0,0, 1,1,1, 0,0,0, 0,0, SUN_POSTN: 29.11d {+01h 56m 27s} +11.91d {+11d 54' 34"} SUN_DIST: 79.89 [deg] Sun_angle= 6.2 [hr] (West of Sun) MOON_POSTN: 84.06d {+05h 36m 14s} +28.25d {+28d 14' 51"} MOON_DIST: 80.09 [deg] MOON_ILLUM: 20 [%] GAL_COORDS: 100.82, 20.45 [deg] galactic lon,lat of the burst (or transient) ECL_COORDS: 24.24, 79.82 [deg] ecliptic lon,lat of the burst (or transient) LC_URL: http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2026/bn260421351/quicklook/glg_lc_medres34_bn260421351.gif COMMENTS: Fermi-GBM Flight-calculated Coordinates. COMMENTS: This trigger occurred at longitude,latitude = 63.80,8.77 [deg]. COMMENTS: The LC_URL file will not be created until ~15 min after the trigger. ////////////////////////////////////////////////////////////////////// TITLE: GCN/FERMI NOTICE NOTICE_DATE: Tue 21 Apr 26 08:26:55 UT NOTICE_TYPE: Fermi-GBM Ground Position RECORD_NUM: 1 TRIGGER_NUM: 798452724 GRB_RA: 291.870d {+19h 27m 29s} (J2000), 291.957d {+19h 27m 50s} (current), 291.703d {+19h 26m 49s} (1950) GRB_DEC: +61.420d {+61d 25' 12"} (J2000), +61.475d {+61d 28' 29"} (current), +61.317d {+61d 19' 00"} (1950) GRB_ERROR: 2.58 [deg radius, statistical only] DATA_SIGNIF: 19.80 [sigma] DATA_INTERVAL: 11.264 [sec] GRB_DATE: 21151 TJD; 111 DOY; 26/04/21 GRB_TIME: 30319.59 SOD {08:25:19.59} UT GRB_PHI: 256.00 [deg] GRB_THETA: 62.00 [deg] E_RANGE: 44.032 - 279.965 [keV] LOC_ALGORITHM: 41731 (Gnd S/W Version number) SUN_POSTN: 29.12d {+01h 56m 28s} +11.91d {+11d 54' 35"} SUN_DIST: 82.93 [deg] Sun_angle= 6.5 [hr] (West of Sun) MOON_POSTN: 84.07d {+05h 36m 17s} +28.25d {+28d 14' 51"} MOON_DIST: 87.48 [deg] MOON_ILLUM: 20 [%] GAL_COORDS: 92.85, 19.50 [deg] galactic lon,lat of the burst (or transient) ECL_COORDS: 341.97, 79.20 [deg] ecliptic lon,lat of the burst (or transient) LC_URL: http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2026/bn260421351/quicklook/glg_lc_medres34_bn260421351.gif POS_MAP_URL: http://gcn.gsfc.nasa.gov/notices_f/gbm_gnd_loc_map_798452724.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. ////////////////////////////////////////////////////////////////////// TITLE: GCN/FERMI NOTICE NOTICE_DATE: Tue 21 Apr 26 08:27:06 UT NOTICE_TYPE: Fermi-GBM Ground Position RECORD_NUM: 2 TRIGGER_NUM: 798452724 GRB_RA: 295.000d {+19h 40m 00s} (J2000), 295.063d {+19h 40m 15s} (current), 294.878d {+19h 39m 31s} (1950) GRB_DEC: +64.100d {+64d 05' 60"} (J2000), +64.162d {+64d 09' 43"} (current), +63.983d {+63d 58' 57"} (1950) GRB_ERROR: 1.99 [deg radius, statistical only] DATA_SIGNIF: 30.50 [sigma] DATA_INTERVAL: 13.312 [sec] GRB_DATE: 21151 TJD; 111 DOY; 26/04/21 GRB_TIME: 30319.59 SOD {08:25:19.59} UT GRB_PHI: 256.00 [deg] GRB_THETA: 59.00 [deg] E_RANGE: 44.032 - 279.965 [keV] LOC_ALGORITHM: 41731 (Gnd S/W Version number) SUN_POSTN: 29.12d {+01h 56m 28s} +11.91d {+11d 54' 35"} SUN_DIST: 81.05 [deg] Sun_angle= 6.3 [hr] (West of Sun) MOON_POSTN: 84.07d {+05h 36m 17s} +28.25d {+28d 14' 51"} MOON_DIST: 84.44 [deg] MOON_ILLUM: 20 [%] GAL_COORDS: 96.05, 19.17 [deg] galactic lon,lat of the burst (or transient) ECL_COORDS: 358.33, 79.36 [deg] ecliptic lon,lat of the burst (or transient) LC_URL: http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2026/bn260421351/quicklook/glg_lc_medres34_bn260421351.gif POS_MAP_URL: http://gcn.gsfc.nasa.gov/notices_f/gbm_gnd_loc_map_798452724.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: Tue 21 Apr 26 08:34:42 UT NOTICE_TYPE: Fermi-GBM Final Position RECORD_NUM: 0 TRIGGER_NUM: 798452724 GRB_RA: 294.970d {+19h 39m 53s} (J2000), 295.033d {+19h 40m 08s} (current), 294.849d {+19h 39m 24s} (1950) GRB_DEC: +64.150d {+64d 09' 00"} (J2000), +64.212d {+64d 12' 43"} (current), +64.033d {+64d 01' 58"} (1950) GRB_ERROR: 3.06 [deg radius, statistical only] GRB_DATE: 21151 TJD; 111 DOY; 26/04/21 GRB_TIME: 30319.59 SOD {08:25:19.59} UT GRB_PHI: 256.00 [deg] GRB_THETA: 59.00 [deg] E_RANGE: 44.032 - 279.965 [keV] LOC_ALGORITHM: 41731 (Gnd S/W Version number) SUN_POSTN: 29.12d {+01h 56m 29s} +11.91d {+11d 54' 42"} SUN_DIST: 81.05 [deg] Sun_angle= 6.3 [hr] (West of Sun) MOON_POSTN: 84.16d {+05h 36m 38s} +28.25d {+28d 14' 56"} MOON_DIST: 84.42 [deg] MOON_ILLUM: 20 [%] GAL_COORDS: 96.10, 19.20 [deg] galactic lon,lat of the burst (or transient) ECL_COORDS: 358.55, 79.39 [deg] ecliptic lon,lat of the burst (or transient) LC_URL: http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2026/bn260421351/quicklook/glg_lc_medres34_bn260421351.gif LOC_URL: http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2026/bn260421351/quicklook/glg_locplot_all_bn260421351.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.