////////////////////////////////////////////////////////////////////// TITLE: GCN/FERMI NOTICE NOTICE_DATE: Sat 18 Apr 26 04:49:40 UT NOTICE_TYPE: Fermi-GBM Alert RECORD_NUM: 1 TRIGGER_NUM: 798180580 GRB_DATE: 21148 TJD; 108 DOY; 26/04/18 GRB_TIME: 17375.20 SOD {04:49:35.20} UT TRIGGER_SIGNIF: 5.1 [sigma] TRIGGER_DUR: 0.256 [sec] E_RANGE: 3-4 [chan] 47-291 [keV] ALGORITHM: 9 DETECTORS: 0,0,0, 0,0,0, 0,0,0, 0,1,1, 0,0, LC_URL: http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2026/bn260418201/quicklook/glg_lc_medres34_bn260418201.gif COMMENTS: Fermi-GBM Trigger Alert. COMMENTS: This trigger occurred at longitude,latitude = 109.45,20.60 [deg]. COMMENTS: The LC_URL file will not be created until ~15 min after the trigger. ////////////////////////////////////////////////////////////////////// TITLE: GCN/FERMI NOTICE NOTICE_DATE: Sat 18 Apr 26 04:50:04 UT NOTICE_TYPE: Fermi-GBM Flight Position RECORD_NUM: 46 TRIGGER_NUM: 798180580 GRB_RA: 143.100d {+09h 32m 24s} (J2000), 143.477d {+09h 33m 55s} (current), 142.381d {+09h 29m 32s} (1950) GRB_DEC: +24.750d {+24d 45' 00"} (J2000), +24.633d {+24d 37' 58"} (current), +24.972d {+24d 58' 18"} (1950) GRB_ERROR: 24.07 [deg radius, statistical plus systematic] GRB_INTEN: 211 [cnts/sec] DATA_SIGNIF: 5.00 [sigma] INTEG_TIME: 0.256 [sec] GRB_DATE: 21148 TJD; 108 DOY; 26/04/18 GRB_TIME: 17375.20 SOD {04:49:35.20} UT GRB_PHI: 132.98 [deg] GRB_THETA: 65.00 [deg] DATA_TIME_SCALE: 0.2560 [sec] HARD_RATIO: 0.51 LOC_ALGORITHM: 3 (version number of) MOST_LIKELY: 94% GRB 2nd_MOST_LIKELY: 4% Generic Transient DETECTORS: 0,0,0, 0,0,0, 0,0,0, 0,1,1, 0,0, SUN_POSTN: 26.18d {+01h 44m 43s} +10.83d {+10d 49' 33"} SUN_DIST: 109.34 [deg] Sun_angle= -7.8 [hr] (East of Sun) MOON_POSTN: 34.20d {+02h 16m 47s} +18.33d {+18d 20' 01"} MOON_DIST: 98.85 [deg] MOON_ILLUM: 1 [%] GAL_COORDS: 204.31, 45.48 [deg] galactic lon,lat of the burst (or transient) ECL_COORDS: 137.44, 9.63 [deg] ecliptic lon,lat of the burst (or transient) LC_URL: http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2026/bn260418201/quicklook/glg_lc_medres34_bn260418201.gif COMMENTS: Fermi-GBM Flight-calculated Coordinates. COMMENTS: This trigger occurred at longitude,latitude = 109.45,20.60 [deg]. COMMENTS: The LC_URL file will not be created until ~15 min after the trigger. ////////////////////////////////////////////////////////////////////// TITLE: GCN/FERMI NOTICE NOTICE_DATE: Sat 18 Apr 26 04:50:21 UT NOTICE_TYPE: Fermi-GBM Ground Position RECORD_NUM: 58 TRIGGER_NUM: 798180580 GRB_RA: 173.710d {+11h 34m 50s} (J2000), 174.042d {+11h 36m 10s} (current), 173.079d {+11h 32m 19s} (1950) GRB_DEC: -16.760d {-16d 45' 35"} (J2000), -16.906d {-16d 54' 19"} (current), -16.483d {-16d 29' 00"} (1950) GRB_ERROR: 23.43 [deg radius, statistical only] DATA_SIGNIF: 7.30 [sigma] DATA_INTERVAL: 0.256 [sec] GRB_DATE: 21148 TJD; 108 DOY; 26/04/18 GRB_TIME: 17375.20 SOD {04:49:35.20} UT GRB_PHI: 144.00 [deg] GRB_THETA: 115.00 [deg] E_RANGE: 44.032 - 279.965 [keV] LOC_ALGORITHM: 4173 (Gnd S/W Version number) SUN_POSTN: 26.18d {+01h 44m 43s} +10.83d {+10d 49' 33"} SUN_DIST: 148.25 [deg] Sun_angle= -9.9 [hr] (East of Sun) MOON_POSTN: 34.20d {+02h 16m 48s} +18.33d {+18d 20' 05"} MOON_DIST: 141.78 [deg] MOON_ILLUM: 1 [%] GAL_COORDS: 277.78, 42.34 [deg] galactic lon,lat of the burst (or transient) ECL_COORDS: 181.11,-17.84 [deg] ecliptic lon,lat of the burst (or transient) LC_URL: http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2026/bn260418201/quicklook/glg_lc_medres34_bn260418201.gif POS_MAP_URL: http://gcn.gsfc.nasa.gov/notices_f/gbm_gnd_loc_map_798180580.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: Sat 18 Apr 26 04:51:32 UT NOTICE_TYPE: Fermi-GBM Ground Position RECORD_NUM: 0 TRIGGER_NUM: 798180580 GRB_RA: 137.190d {+09h 08m 46s} (J2000), 137.626d {+09h 10m 30s} (current), 136.358d {+09h 05m 26s} (1950) GRB_DEC: +45.000d {+45d 00' 00"} (J2000), +44.892d {+44d 53' 32"} (current), +45.203d {+45d 12' 10"} (1950) GRB_ERROR: 18.37 [deg radius, statistical only] DATA_SIGNIF: 4.50 [sigma] DATA_INTERVAL: 2.048 [sec] GRB_DATE: 21148 TJD; 108 DOY; 26/04/18 GRB_TIME: 17375.20 SOD {04:49:35.20} UT GRB_PHI: 140.00 [deg] GRB_THETA: 45.00 [deg] E_RANGE: 44.032 - 279.965 [keV] LOC_ALGORITHM: 41731 (Gnd S/W Version number) SUN_POSTN: 26.18d {+01h 44m 43s} +10.83d {+10d 49' 34"} SUN_DIST: 97.00 [deg] Sun_angle= -7.4 [hr] (East of Sun) MOON_POSTN: 34.21d {+02h 16m 50s} +18.34d {+18d 20' 21"} MOON_DIST: 86.21 [deg] MOON_ILLUM: 1 [%] GAL_COORDS: 175.47, 42.64 [deg] galactic lon,lat of the burst (or transient) ECL_COORDS: 125.69, 27.23 [deg] ecliptic lon,lat of the burst (or transient) LC_URL: http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2026/bn260418201/quicklook/glg_lc_medres34_bn260418201.gif POS_MAP_URL: http://gcn.gsfc.nasa.gov/notices_f/gbm_gnd_loc_map_798180580.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: Sat 18 Apr 26 04:58:52 UT NOTICE_TYPE: Fermi-GBM Final Position RECORD_NUM: 0 TRIGGER_NUM: 798180580 GRB_RA: 140.620d {+09h 22m 29s} (J2000), 141.009d {+09h 24m 02s} (current), 139.879d {+09h 19m 31s} (1950) GRB_DEC: +29.270d {+29d 16' 12"} (J2000), +29.157d {+29d 09' 24"} (current), +29.484d {+29d 29' 03"} (1950) GRB_ERROR: 18.11 [deg radius, statistical only] GRB_DATE: 21148 TJD; 108 DOY; 26/04/18 GRB_TIME: 17375.20 SOD {04:49:35.20} UT GRB_PHI: 133.00 [deg] GRB_THETA: 60.00 [deg] E_RANGE: 44.032 - 279.965 [keV] LOC_ALGORITHM: 41731 (Gnd S/W Version number) SUN_POSTN: 26.18d {+01h 44m 44s} +10.83d {+10d 49' 40"} SUN_DIST: 105.58 [deg] Sun_angle= -7.7 [hr] (East of Sun) MOON_POSTN: 34.28d {+02h 17m 08s} +18.37d {+18d 22' 02"} MOON_DIST: 94.88 [deg] MOON_ILLUM: 1 [%] GAL_COORDS: 197.41, 44.30 [deg] galactic lon,lat of the burst (or transient) ECL_COORDS: 133.83, 13.20 [deg] ecliptic lon,lat of the burst (or transient) LC_URL: http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2026/bn260418201/quicklook/glg_lc_medres34_bn260418201.gif LOC_URL: http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2026/bn260418201/quicklook/glg_locplot_all_bn260418201.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.