(All information courtesy of the instrument teams.)
Previous IAU Circulars
TITLE: GCN/FERMI NOTICE NOTICE_DATE: Mon 02 Aug 21 20:08:10 UT NOTICE_TYPE: Fermi-GBM Flight Position RECORD_NUM: 45 TRIGGER_NUM: 649627691 GRB_RA: 225.683d {+15h 02m 44s} (J2000), 225.906d {+15h 03m 37s} (current), 225.168d {+15h 00m 40s} (1950) GRB_DEC: +32.100d {+32d 06' 00"} (J2000), +32.016d {+32d 00' 58"} (current), +32.295d {+32d 17' 43"} (1950) GRB_ERROR: 5.83 [deg radius, statistical plus systematic] GRB_INTEN: 458 [cnts/sec] DATA_SIGNIF: 20.90 [sigma] INTEG_TIME: 1.024 [sec] GRB_DATE: 19428 TJD; 214 DOY; 21/08/02 GRB_TIME: 72486.49 SOD {20:08:06.49} UT GRB_PHI: 85.00 [deg] GRB_THETA: 50.00 [deg] DATA_TIME_SCALE: 1.0240 [sec] HARD_RATIO: 0.54 LOC_ALGORITHM: 3 (version number of) MOST_LIKELY: 95% GRB 2nd_MOST_LIKELY: 4% Generic Transient DETECTORS: 1,1,1, 0,1,0, 0,0,0, 0,1,0, 0,0, SUN_POSTN: 133.20d {+08h 52m 48s} +17.54d {+17d 32' 13"} SUN_DIST: 83.02 [deg] Sun_angle= -6.2 [hr] (East of Sun) MOON_POSTN: 63.76d {+04h 15m 03s} +20.90d {+20d 53' 58"} MOON_DIST: 124.39 [deg] MOON_ILLUM: 29 [%] GAL_COORDS: 50.83, 61.15 [deg] galactic lon,lat of the burst (or transient) ECL_COORDS: 210.22, 46.77 [deg] ecliptic lon,lat of the burst (or transient) LC_URL: http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2021/bn210802839/quicklook/glg_lc_medres34_bn210802839.gif COMMENTS: Fermi-GBM Flight-calculated Coordinates. COMMENTS: This trigger occurred at longitude,latitude = 18.37,25.50 [deg]. COMMENTS: The LC_URL file will not be created until ~15 min after the trigger.
TITLE: GCN/FERMI NOTICE NOTICE_DATE: Mon 02 Aug 21 20:08:20 UT NOTICE_TYPE: Fermi-GBM Flight Position RECORD_NUM: 59 TRIGGER_NUM: 649627691 GRB_RA: 228.300d {+15h 13m 12s} (J2000), 228.509d {+15h 14m 02s} (current), 227.815d {+15h 11m 16s} (1950) GRB_DEC: +36.817d {+36d 49' 00"} (J2000), +36.737d {+36d 44' 13"} (current), +37.003d {+37d 00' 10"} (1950) GRB_ERROR: 4.37 [deg radius, statistical plus systematic] GRB_INTEN: 904 [cnts/sec] DATA_SIGNIF: 60.10 [sigma] INTEG_TIME: 2.048 [sec] GRB_DATE: 19428 TJD; 214 DOY; 21/08/02 GRB_TIME: 72486.49 SOD {20:08:06.49} UT GRB_PHI: 86.00 [deg] GRB_THETA: 45.00 [deg] DATA_TIME_SCALE: 2.0480 [sec] HARD_RATIO: 0.44 LOC_ALGORITHM: 3 (version number of) MOST_LIKELY: 95% GRB 2nd_MOST_LIKELY: 4% Generic Transient DETECTORS: 1,1,1, 0,1,0, 0,0,0, 0,1,0, 0,0, SUN_POSTN: 133.20d {+08h 52m 48s} +17.54d {+17d 32' 13"} SUN_DIST: 83.71 [deg] Sun_angle= -6.4 [hr] (East of Sun) MOON_POSTN: 63.77d {+04h 15m 04s} +20.90d {+20d 53' 59"} MOON_DIST: 120.59 [deg] MOON_ILLUM: 29 [%] GAL_COORDS: 59.87, 58.62 [deg] galactic lon,lat of the burst (or transient) ECL_COORDS: 210.21, 51.96 [deg] ecliptic lon,lat of the burst (or transient) LC_URL: http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2021/bn210802839/quicklook/glg_lc_medres34_bn210802839.gif COMMENTS: Fermi-GBM Flight-calculated Coordinates. COMMENTS: This trigger occurred at longitude,latitude = 18.37,25.50 [deg]. COMMENTS: The LC_URL file will not be created until ~15 min after the trigger.
TITLE: GCN/FERMI NOTICE NOTICE_DATE: Mon 02 Aug 21 20:08:25 UT NOTICE_TYPE: Fermi-GBM Ground Position RECORD_NUM: 58 TRIGGER_NUM: 649627691 GRB_RA: 233.280d {+15h 33m 07s} (J2000), 233.495d {+15h 33m 59s} (current), 232.782d {+15h 31m 08s} (1950) GRB_DEC: +32.570d {+32d 34' 12"} (J2000), +32.498d {+32d 29' 54"} (current), +32.737d {+32d 44' 15"} (1950) GRB_ERROR: 2.06 [deg radius, statistical only] DATA_SIGNIF: 58.00 [sigma] DATA_INTERVAL: 1.024 [sec] GRB_DATE: 19428 TJD; 214 DOY; 21/08/02 GRB_TIME: 72486.49 SOD {20:08:06.49} UT GRB_PHI: 93.00 [deg] GRB_THETA: 48.00 [deg] E_RANGE: 44.032 - 279.965 [keV] LOC_ALGORITHM: 4173 (Gnd S/W Version number) SUN_POSTN: 133.20d {+08h 52m 48s} +17.54d {+17d 32' 13"} SUN_DIST: 88.96 [deg] Sun_angle= -6.7 [hr] (East of Sun) MOON_POSTN: 63.77d {+04h 15m 04s} +20.90d {+20d 53' 60"} MOON_DIST: 125.71 [deg] MOON_ILLUM: 29 [%] GAL_COORDS: 51.78, 54.73 [deg] galactic lon,lat of the burst (or transient) ECL_COORDS: 218.83, 49.69 [deg] ecliptic lon,lat of the burst (or transient) LC_URL: http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2021/bn210802839/quicklook/glg_lc_medres34_bn210802839.gif POS_MAP_URL: http://gcn.gsfc.nasa.gov/notices_f/gbm_gnd_loc_map_649627691.fits COMMENTS: Fermi-GBM Ground-calculated Coordinates. COMMENTS: In the LAT Field-of-view. COMMENTS: Bright hard burst in the GBM. 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: Mon 02 Aug 21 20:09:02 UT NOTICE_TYPE: Fermi-GBM Ground Position RECORD_NUM: 2 TRIGGER_NUM: 649627691 GRB_RA: 230.360d {+15h 21m 26s} (J2000), 230.578d {+15h 22m 19s} (current), 229.854d {+15h 19m 25s} (1950) GRB_DEC: +32.120d {+32d 07' 12"} (J2000), +32.044d {+32d 02' 37"} (current), +32.299d {+32d 17' 55"} (1950) GRB_ERROR: 1.00 [deg radius, statistical only] DATA_SIGNIF: 52.00 [sigma] DATA_INTERVAL: 4.096 [sec] GRB_DATE: 19428 TJD; 214 DOY; 21/08/02 GRB_TIME: 72486.49 SOD {20:08:06.49} UT GRB_PHI: 90.00 [deg] GRB_THETA: 49.00 [deg] E_RANGE: 44.032 - 279.965 [keV] LOC_ALGORITHM: 41731 (Gnd S/W Version number) SUN_POSTN: 133.20d {+08h 52m 48s} +17.54d {+17d 32' 12"} SUN_DIST: 86.79 [deg] Sun_angle= -6.5 [hr] (East of Sun) MOON_POSTN: 63.77d {+04h 15m 05s} +20.90d {+20d 54' 04"} MOON_DIST: 125.57 [deg] MOON_ILLUM: 29 [%] GAL_COORDS: 50.86, 57.19 [deg] galactic lon,lat of the burst (or transient) ECL_COORDS: 215.60, 48.35 [deg] ecliptic lon,lat of the burst (or transient) LC_URL: http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2021/bn210802839/quicklook/glg_lc_medres34_bn210802839.gif POS_MAP_URL: http://gcn.gsfc.nasa.gov/notices_f/gbm_gnd_loc_map_649627691.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: Mon 02 Aug 21 20:17:15 UT NOTICE_TYPE: Fermi-GBM Final Position RECORD_NUM: 0 TRIGGER_NUM: 649627691 GRB_RA: 229.890d {+15h 19m 34s} (J2000), 230.113d {+15h 20m 27s} (current), 229.374d {+15h 17m 30s} (1950) GRB_DEC: +30.270d {+30d 16' 12"} (J2000), +30.193d {+30d 11' 34"} (current), +30.450d {+30d 27' 01"} (1950) GRB_ERROR: 1.00 [deg radius, statistical only] GRB_DATE: 19428 TJD; 214 DOY; 21/08/02 GRB_TIME: 72486.49 SOD {20:08:06.49} UT GRB_PHI: 90.00 [deg] GRB_THETA: 51.00 [deg] E_RANGE: 44.032 - 279.965 [keV] LOC_ALGORITHM: 41731 (Gnd S/W Version number) SUN_POSTN: 133.21d {+08h 52m 49s} +17.54d {+17d 32' 07"} SUN_DIST: 87.00 [deg] Sun_angle= -6.5 [hr] (East of Sun) MOON_POSTN: 63.84d {+04h 15m 22s} +20.92d {+20d 55' 08"} MOON_DIST: 127.21 [deg] MOON_ILLUM: 29 [%] GAL_COORDS: 47.40, 57.51 [deg] galactic lon,lat of the burst (or transient) ECL_COORDS: 216.08, 46.49 [deg] ecliptic lon,lat of the burst (or transient) LC_URL: http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2021/bn210802839/quicklook/glg_lc_medres34_bn210802839.gif LOC_URL: http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2021/bn210802839/quicklook/glg_locplot_all_bn210802839.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. COMMENTS: COMMENTS: NOTE: This GBM event is temporally(1.0<100sec) coincident with the INTEGRAL_SPIACS event (trignum=9328).
TITLE: GCN/INTEGRAL NOTICE NOTICE_DATE: Mon 02 Aug 21 20:09:04 UT NOTICE_TYPE: INTEGRAL SPI ACS Trigger TRIGGER_NUM: 9328, Sub_Num: 0 GRB_INTEN: 9.23 [sigma] GRB_TIME: 72485.62 SOD {20:08:05.62} UT GRB_DATE: 19428 TJD; 214 DOY; 21/08/02 COMMENTS: INTEGRAL SPI_ACS GRB Trigger. COMMENTS: Time_Scale=0.8000 and Time_Error=0.4000. COMMENTS: COMMENTS: NOTE: This SPIACS event is temporally(1.0<100sec) coincident with the FERMI_GBM event (trignum=649627691). COMMENTS: COMMENTS: The SPIACS lightcurve can be found at: COMMENTS: ftp://isdcarc.unige.ch/arc/FTP/ibas/spiacs/2021-08/2021-08-02T20-08-05.4499-11513-48016-0.lc
TITLE: GCN/FERMI NOTICE NOTICE_DATE: Mon 02 Aug 21 23:25:53 UT NOTICE_TYPE: Fermi-GBM Flight Position RECORD_NUM: 45 TRIGGER_NUM: 649627691 GRB_RA: 225.683d {+15h 02m 44s} (J2000), 225.906d {+15h 03m 37s} (current), 225.168d {+15h 00m 40s} (1950) GRB_DEC: +32.100d {+32d 06' 00"} (J2000), +32.016d {+32d 00' 58"} (current), +32.295d {+32d 17' 43"} (1950) GRB_ERROR: 5.83 [deg radius, statistical plus systematic] GRB_INTEN: 458 [cnts/sec] DATA_SIGNIF: 20.90 [sigma] INTEG_TIME: 1.024 [sec] GRB_DATE: 19428 TJD; 214 DOY; 21/08/02 GRB_TIME: 72486.49 SOD {20:08:06.49} UT GRB_PHI: 85.00 [deg] GRB_THETA: 50.00 [deg] DATA_TIME_SCALE: 1.0240 [sec] HARD_RATIO: 0.54 LOC_ALGORITHM: 3 (version number of) MOST_LIKELY: 95% GRB 2nd_MOST_LIKELY: 4% Generic Transient DETECTORS: 1,1,1, 0,1,0, 0,0,0, 0,1,0, 0,0, SUN_POSTN: 133.33d {+08h 53m 20s} +17.50d {+17d 30' 04"} SUN_DIST: 82.93 [deg] Sun_angle= -6.2 [hr] (East of Sun) MOON_POSTN: 65.45d {+04h 21m 48s} +21.32d {+21d 18' 56"} MOON_DIST: 123.48 [deg] MOON_ILLUM: 28 [%] GAL_COORDS: 50.83, 61.15 [deg] galactic lon,lat of the burst (or transient) ECL_COORDS: 210.22, 46.77 [deg] ecliptic lon,lat of the burst (or transient) LC_URL: http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2021/bn210802839/quicklook/glg_lc_medres34_bn210802839.gif COMMENTS: Fermi-GBM Flight-calculated Coordinates. COMMENTS: This trigger occurred at longitude,latitude = 18.37,25.50 [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 INTEGRAL_SPIACS event (trignum=9328).
TITLE: GCN/FERMI NOTICE NOTICE_DATE: Mon 02 Aug 21 23:25:56 UT NOTICE_TYPE: Fermi-GBM Flight Position RECORD_NUM: 59 TRIGGER_NUM: 649627691 GRB_RA: 228.300d {+15h 13m 12s} (J2000), 228.509d {+15h 14m 02s} (current), 227.815d {+15h 11m 16s} (1950) GRB_DEC: +36.817d {+36d 49' 00"} (J2000), +36.737d {+36d 44' 13"} (current), +37.003d {+37d 00' 10"} (1950) GRB_ERROR: 4.37 [deg radius, statistical plus systematic] GRB_INTEN: 904 [cnts/sec] DATA_SIGNIF: 60.10 [sigma] INTEG_TIME: 2.048 [sec] GRB_DATE: 19428 TJD; 214 DOY; 21/08/02 GRB_TIME: 72486.49 SOD {20:08:06.49} UT GRB_PHI: 86.00 [deg] GRB_THETA: 45.00 [deg] DATA_TIME_SCALE: 2.0480 [sec] HARD_RATIO: 0.44 LOC_ALGORITHM: 3 (version number of) MOST_LIKELY: 95% GRB 2nd_MOST_LIKELY: 4% Generic Transient DETECTORS: 1,1,1, 0,1,0, 0,0,0, 0,1,0, 0,0, SUN_POSTN: 133.33d {+08h 53m 20s} +17.50d {+17d 30' 04"} SUN_DIST: 83.63 [deg] Sun_angle= -6.3 [hr] (East of Sun) MOON_POSTN: 65.45d {+04h 21m 48s} +21.32d {+21d 18' 57"} MOON_DIST: 119.79 [deg] MOON_ILLUM: 28 [%] GAL_COORDS: 59.87, 58.62 [deg] galactic lon,lat of the burst (or transient) ECL_COORDS: 210.21, 51.96 [deg] ecliptic lon,lat of the burst (or transient) LC_URL: http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2021/bn210802839/quicklook/glg_lc_medres34_bn210802839.gif COMMENTS: Fermi-GBM Flight-calculated Coordinates. COMMENTS: This trigger occurred at longitude,latitude = 18.37,25.50 [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 INTEGRAL_SPIACS event (trignum=9328).
TITLE: GCN/FERMI NOTICE NOTICE_DATE: Tue 03 Aug 21 00:17:37 UT NOTICE_TYPE: Fermi-GBM Final Position RECORD_NUM: 0 TRIGGER_NUM: 649627691 GRB_RA: 229.920d {+15h 19m 41s} (J2000), 230.143d {+15h 20m 34s} (current), 229.404d {+15h 17m 37s} (1950) GRB_DEC: +30.300d {+30d 18' 00"} (J2000), +30.223d {+30d 13' 22"} (current), +30.480d {+30d 28' 49"} (1950) GRB_ERROR: 1.00 [deg radius, statistical only] GRB_DATE: 19428 TJD; 214 DOY; 21/08/02 GRB_TIME: 72486.49 SOD {20:08:06.49} UT GRB_PHI: 90.16 [deg] GRB_THETA: 50.80 [deg] E_RANGE: 50.000 - 300.000 [keV] LOC_ALGORITHM: 415 (Gnd S/W Version number) SUN_POSTN: 133.37d {+08h 53m 28s} +17.49d {+17d 29' 30"} SUN_DIST: 86.90 [deg] Sun_angle= -6.5 [hr] (East of Sun) MOON_POSTN: 65.89d {+04h 23m 34s} +21.42d {+21d 25' 18"} MOON_DIST: 126.18 [deg] MOON_ILLUM: 28 [%] GAL_COORDS: 47.46, 57.48 [deg] galactic lon,lat of the burst (or transient) ECL_COORDS: 216.10, 46.53 [deg] ecliptic lon,lat of the burst (or transient) LC_URL: http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2021/bn210802839/quicklook/glg_lc_medres34_bn210802839.gif LOC_URL: http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2021/bn210802839/quicklook/glg_locplot_all_bn210802839.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 has human-in-the-loop processing. COMMENTS: COMMENTS: NOTE: This GBM event is temporally(1.0<100sec) coincident with the INTEGRAL_SPIACS event (trignum=9328).
Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment _________|_____________________|_____________________|____________________________________|_____|_______|_______|________ 62 | 2021-08-02 20:09:03 | MASTER-SAAO | (15h 32m 49.34s , +32d 39m 18.2s) | C | 10 | 17.1 | 96 | 2021-08-02 20:09:32 | MASTER-SAAO | (15h 32m 55.22s , +32d 38m 20.3s) | C | 20 | 17.7 | 122 | 2021-08-02 20:09:58 | MASTER-Tavrida | (15h 34m 32.89s , +32d 26m 04.8s) | C | 20 | 18.2 | 135 | 2021-08-02 20:10:11 | MASTER-SAAO | (15h 21m 09.74s , +32d 11m 08.8s) | P\ | 20 | 15.8 | 166 | 2021-08-02 20:10:37 | MASTER-Tavrida | (15h 22m 58.48s , +31d 57m 51.2s) | P\ | 30 | 16.0 | 180 | 2021-08-02 20:10:51 | MASTER-SAAO | (15h 21m 16.80s , +32d 11m 21.8s) | P\ | 30 | 15.8 | 220 | 2021-08-02 20:11:26 | MASTER-Tavrida | (15h 22m 51.94s , +31d 56m 46.2s) | P\ | 40 | 16.0 |Filter C is a clear (unfiltred) band.
TITLE: GCN/FERMI NOTICE NOTICE_DATE: Tue 03 Aug 21 06:33:02 UT NOTICE_TYPE: Fermi-LAT Offline Position TRIGGER_NUM: 210802839 GRB_RA: 230.900d {+15h 23m 36s} (J2000), 231.123d {+15h 24m 30s} (current), 230.383d {+15h 21m 32s} (1950) GRB_DEC: +29.846d {+29d 50' 46"} (J2000), +29.770d {+29d 46' 13"} (current), +30.023d {+30d 01' 21"} (1950) GRB_ERROR: 21.11 [arcmin radius, 90% containment, statistical only] GRB_DATE: 19428 TJD; 214 DOY; 21/08/02 GRB_TIME: 72486.00 SOD {20:08:06.00} UT TRIGGER_ID: 0x20000000 MISC: 0x40000000 SUN_POSTN: 133.62d {+08h 54m 28s} +17.42d {+17d 25' 24"} SUN_DIST: 87.68 [deg] Sun_angle= -6.5 [hr] (East of Sun) MOON_POSTN: 69.12d {+04h 36m 30s} +22.16d {+22d 09' 28"} MOON_DIST: 125.26 [deg] MOON_ILLUM: 25 [%] GAL_COORDS: 46.75, 56.60 [deg] galactic lon,lat of the burst (or transient) ECL_COORDS: 217.49, 46.42 [deg] ecliptic lon,lat of the burst (or transient) COMMENTS: Fermi LAT Offline position. COMMENTS: This Notice was ground-generated -- not flight-generated. COMMENTS: It is the result of human-in-the-loop processing. COMMENTS: This is a human generated position of a LAT ground detection. COMMENTS: This source corresponds to GBM trigger.
RA (J2000): 15h 22m 53.48s Dec(J2000): +29d 54' 06.5"with an uncertainty of 3.5 arcsec (radius, 90% confidence). This position is 9.8 arcmin from the Fermi/LAT position. While we cannot determine at the present time whether the source is fading, we note that a previous 1 ks Swift-XRT visit of the field showed no sign of Source 7 (https://www.swift.ac.uk/2SXPS/Fields/10000004351).
T0+[hour] MID-UT T-EXP[sec] 5-sigma limits ------------------------------------------------------------------------------------------------ 15.8 2021-08-03 11:54:24 1080 Rc>17.2, Ic>16.9 ------------------------------------------------------------------------------------------------ T0+ : Elapsed time after the burst T-EXP: Total Exposure timeWe used PS1 catalog for flux calibration. The magnitudes are expressed in the AB system. The images were processed in real-time through the MITSuME GPU reduction pipeline (Niwano et al. 2021, PASJ, Vol.73, Issue 1, Pages 4-24; https://github.com/MNiwano/Eclaire).