////////////////////////////////////////////////////////////////////// TITLE: GCN/FERMI NOTICE NOTICE_DATE: Sun 25 Oct 26 17:38:33 UT NOTICE_TYPE: Fermi-GBM Alert RECORD_NUM: 1 TRIGGER_NUM: 814642716 GRB_DATE: 21338 TJD; 298 DOY; 26/10/25 GRB_TIME: 63511.94 SOD {17:38:31.94} UT TRIGGER_SIGNIF: 5.9 [sigma] TRIGGER_DUR: 0.064 [sec] E_RANGE: 3-4 [chan] 47-291 [keV] ALGORITHM: 5 DETECTORS: 1,0,0, 0,0,0, 1,0,0, 0,0,0, 0,0, LC_URL: http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2026/bn261025735/quicklook/glg_lc_medres34_bn261025735.gif COMMENTS: Fermi-GBM Trigger Alert. COMMENTS: This trigger occurred at longitude,latitude = 262.83,-1.93 [deg]. COMMENTS: The LC_URL file will not be created until ~15 min after the trigger. ////////////////////////////////////////////////////////////////////// TITLE: GCN/FERMI NOTICE NOTICE_DATE: Sun 25 Oct 26 17:38:35 UT NOTICE_TYPE: Fermi-GBM Flight Position RECORD_NUM: 50 TRIGGER_NUM: 814642716 GRB_RA: 256.850d {+17h 07m 24s} (J2000), 257.105d {+17h 08m 25s} (current), 256.375d {+17h 05m 30s} (1950) GRB_DEC: +31.467d {+31d 28' 00"} (J2000), +31.433d {+31d 25' 59"} (current), +31.531d {+31d 31' 52"} (1950) GRB_ERROR: 6.90 [deg radius, statistical plus systematic] GRB_INTEN: 434 [cnts/sec] DATA_SIGNIF: 11.60 [sigma] INTEG_TIME: 0.256 [sec] GRB_DATE: 21338 TJD; 298 DOY; 26/10/25 GRB_TIME: 63511.94 SOD {17:38:31.94} UT GRB_PHI: 96.00 [deg] GRB_THETA: 25.00 [deg] DATA_TIME_SCALE: 0.2560 [sec] HARD_RATIO: 0.84 LOC_ALGORITHM: 3 (version number of) MOST_LIKELY: 95% GRB 2nd_MOST_LIKELY: 2% Cyg X-1 DETECTORS: 1,0,0, 0,0,0, 1,0,0, 0,0,0, 0,0, SUN_POSTN: 210.13d {+14h 00m 32s} -12.28d {-12d 16' 33"} SUN_DIST: 62.74 [deg] Sun_angle= -3.1 [hr] (East of Sun) MOON_POSTN: 22.84d {+01h 31m 21s} +14.13d {+14d 08' 02"} MOON_DIST: 110.85 [deg] MOON_ILLUM: 100 [%] GAL_COORDS: 53.92, 34.81 [deg] galactic lon,lat of the burst (or transient) ECL_COORDS: 250.71, 54.03 [deg] ecliptic lon,lat of the burst (or transient) LC_URL: http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2026/bn261025735/quicklook/glg_lc_medres34_bn261025735.gif COMMENTS: Fermi-GBM Flight-calculated Coordinates. COMMENTS: This trigger occurred at longitude,latitude = 262.83,-1.93 [deg]. COMMENTS: The LC_URL file will not be created until ~15 min after the trigger. ////////////////////////////////////////////////////////////////////// TITLE: GCN/FERMI NOTICE NOTICE_DATE: Sun 25 Oct 26 17:38:50 UT NOTICE_TYPE: Fermi-GBM Ground Position RECORD_NUM: 60 TRIGGER_NUM: 814642716 GRB_RA: 260.850d {+17h 23m 24s} (J2000), 261.121d {+17h 24m 29s} (current), 260.344d {+17h 21m 23s} (1950) GRB_DEC: +26.070d {+26d 04' 12"} (J2000), +26.047d {+26d 02' 48"} (current), +26.115d {+26d 06' 56"} (1950) GRB_ERROR: 4.24 [deg radius, statistical only] DATA_SIGNIF: 11.50 [sigma] DATA_INTERVAL: 0.256 [sec] GRB_DATE: 21338 TJD; 298 DOY; 26/10/25 GRB_TIME: 63511.94 SOD {17:38:31.94} UT GRB_PHI: 91.00 [deg] GRB_THETA: 31.00 [deg] E_RANGE: 44.032 - 279.965 [keV] LOC_ALGORITHM: 4173 (Gnd S/W Version number) SUN_POSTN: 210.13d {+14h 00m 32s} -12.28d {-12d 16' 33"} SUN_DIST: 62.66 [deg] Sun_angle= -3.4 [hr] (East of Sun) MOON_POSTN: 22.84d {+01h 31m 22s} +14.14d {+14d 08' 06"} MOON_DIST: 110.54 [deg] MOON_ILLUM: 100 [%] GAL_COORDS: 48.86, 30.00 [deg] galactic lon,lat of the burst (or transient) ECL_COORDS: 257.40, 49.11 [deg] ecliptic lon,lat of the burst (or transient) LC_URL: http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2026/bn261025735/quicklook/glg_lc_medres34_bn261025735.gif POS_MAP_URL: http://gcn.gsfc.nasa.gov/notices_f/gbm_gnd_loc_map_814642716.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 25 Oct 26 17:45:12 UT NOTICE_TYPE: Fermi-GBM Final Position RECORD_NUM: 0 TRIGGER_NUM: 814642716 GRB_RA: 258.190d {+17h 12m 46s} (J2000), 258.466d {+17h 13m 52s} (current), 257.675d {+17h 10m 42s} (1950) GRB_DEC: +24.790d {+24d 47' 24"} (J2000), +24.760d {+24d 45' 35"} (current), +24.848d {+24d 50' 54"} (1950) GRB_ERROR: 4.64 [deg radius, statistical only] GRB_DATE: 21338 TJD; 298 DOY; 26/10/25 GRB_TIME: 63511.94 SOD {17:38:31.94} UT GRB_PHI: 86.00 [deg] GRB_THETA: 30.00 [deg] E_RANGE: 44.032 - 279.965 [keV] LOC_ALGORITHM: 41731 (Gnd S/W Version number) SUN_POSTN: 210.14d {+14h 00m 33s} -12.28d {-12d 16' 39"} SUN_DIST: 59.94 [deg] Sun_angle= -3.2 [hr] (East of Sun) MOON_POSTN: 22.90d {+01h 31m 36s} +14.16d {+14d 09' 39"} MOON_DIST: 113.29 [deg] MOON_ILLUM: 100 [%] GAL_COORDS: 46.58, 31.90 [deg] galactic lon,lat of the burst (or transient) ECL_COORDS: 254.01, 47.58 [deg] ecliptic lon,lat of the burst (or transient) LC_URL: http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2026/bn261025735/quicklook/glg_lc_medres34_bn261025735.gif LOC_URL: http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2026/bn261025735/quicklook/glg_locplot_all_bn261025735.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 Short GRB.