GRB 200716B
GCN Circular 28113
Subject
GRB 200716B: Fermi GBM Final Real-time Localization
Date
2020-07-16T07:44:52Z (5 years ago)
From
Fermi GBM Team at MSFC/Fermi-GBM <do_not_reply@GIOC.nsstc.nasa.gov>
The Fermi GBM team reports the detection of a likely LONG GRB
At 07:34:28 UT on 16 Jul 2020, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 200716B (trigger 616577673.479748 / 200716316).
The on-ground calculated location, using the Fermi GBM trigger data, is RA = 344.4, Dec = -15.9 (J2000 degrees, equivalent to J2000 22h 57m, -15d 54'), with a statistical uncertainty of 4.2 degrees.
The angle from the Fermi LAT boresight is 67.0 degrees.
The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2020/bn200716316/quicklook/glg_skymap_all_bn200716316.png
The HEALPix FITS file, including the estimated localization systematic, can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2020/bn200716316/quicklook/glg_healpix_all_bn200716316.fit
The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2020/bn200716316/quicklook/glg_lc_medres34_bn200716316.gif
GCN Circular 28114
Subject
GRB 200716B: BALROG localization (Fermi Trigger 616577673 / GRB 200716316)
Date
2020-07-16T08:04:03Z (5 years ago)
From
Jochen Greiner at MPE,Garching <jcg@mpe.mpg.de>
F. Kunzweiler, B. Biltzinger, F. Berlato, J. Burgess & J. Greiner (all MPE Garching) report:
The public trigdat data of the Fermi Gamma-ray Burst Monitor (GBM) trigger
616577673 at 07:34:28 on 16 July 2020 were automatically fitted for spectrum
and sky location with BALROG (Burgess et al. 2018, MNRAS 476, 1427;
Berlato et al. 2019, ApJ 873, 60).
The best-fit position (1 sigma statistical errors) is:
RA(2000.0) = 343.0+/-3.9 deg
Decl.(2000.0) = -22.2+/-2.5 deg
We estimate an additional systematic error of 1 deg.
Further details are available at:
https://grb.mpe.mpg.de/grb/GRB200716316/
The Healpix map can be downloaded from:
https://grb.mpe.mpg.de/grb/GRB200716316/healpix
The location parameters are available as JSON at:
https://grb.mpe.mpg.de/grb/GRB200716316/json
GCN Circular 28118
Subject
GRB 200716B: AstroSat CZTI detection
Date
2020-07-16T17:49:32Z (5 years ago)
From
Soumya Gupta at IUCAA/ASTROSAT <soumya@iucaa>
S. Gupta, V. Sharma and D. Bhattacharya (IUCAA), V. Bhalerao (IIT-B), A. R. Rao (IUCAA/TIFR) and S. Vadawale (PRL) report on behalf of the AstroSat CZTI collaboration:
Analysis of AstroSat CZTI data showed the detection of a long GRB 200716B, which was also detected by Fermi GBM (GCN #28113) and BALROG (Biltzinge B. et al., GCN #28114).
The source was clearly detected in the 40-200 keV energy range. The light curve showed multiple peaks of emission with the strongest peak at 2020-07-16 07:34:29.531 UT. The measured peak count rate associated with the burst is 356 +/- 27 cts/s above the background in the combined data of four quadrants, with a total of 3023 +/- 68 cts. The local mean background count rate was 572 +/- 1 cts/s. Using cumulative rates, we measure a T90 of 29.35 +/- 0.08 s.
It was also clearly detected in the CsI anticoincidence (Veto) detector in the 100-500 keV energy range. The light curve showed multiple peaks of emission with the strongest peak at 2020-07-16 07:34:28.000 UT. The measured peak count rate is 1190 +/- 53 cts/s above the background in the combined Veto data of four quadrants, with a total of 8920 +/- 167 cts. The local mean background count rate was 1623 +/- 3 cts/s. We measure a T90 of 28.17 +/- 0.31 s from the cumulative Veto light curve.
CZTI GRB detections are reported regularly on the payload site at http://astrosat.iucaa.in/czti/?q=grb. CZTI is built by a TIFR-led consortium of institutes across India, including VSSC, ISAC, IUCAA, SAC and PRL. The Indian Space Research Organisation funded, managed and facilitated the project.
GCN Circular 28119
Subject
Fermi GRB 200716B: Global MASTER-Net observations report
Date
2020-07-16T20:45:09Z (5 years ago)
From
Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>
V. Lipunov, E. Gorbovskoy, V.Kornilov, N.Tyurina, P.Balanutsa, A.Kuznetsov, F.Balakin,
V.Vladimirov, D. Vlasenko, I.Gorbunov, D.Zimnukhov, V.Senik, T.Pogrosheva,
D.Kuvshinov, D. Cheryasov
(Lomonosov Moscow State University, SAI, Physics Department),
R. Podesta, C.Lopez, F. Podesta, C.Francile
(Observatorio Astronomico Felix Aguilar OAFA),
H.Levato
(Instituto de Ciencias Astronomicas, de la Tierra y del Espacio ICATE),
R. Rebolo, M. Serra
(The Instituto de Astrofisica de Canarias),
D. Buckley
(South African Astronomical Observatory),
O.A. Gres, N.M. Budnev, O.Ershova
(Irkutsk State University, API),
A. Tlatov, D. Dormidontov
(Kislovodsk Solar Station of the Pulkovo Observatory),
V. Yurkov, A. Gabovich, Yu. Sergienko
(Blagoveschensk Educational State University)
MASTER-SAAO robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in South Africa (South African Astronomical Observatory) started inspect of the Fermi GRB 200716B ( Fermi GBM team, GCN 28113) errorbox 45224 sec after notice time and 45252 sec after trigger time at 2020-07-16 20:08:40 UT, with upper limit up to 19.8 mag. The observations began at zenith distance = 74 deg. The sun altitude is -53.7 deg.
The galactic latitude b = -70 deg., longitude l = 44 deg.
Real time updated cover map and OT discovered available here:
https://master.sai.msu.ru/site/master2/observ.php?id=1402322
We obtain a following upper limits.
Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment
_________|_____________________|_____________________|____________________________________|_____|_______|_______|________
45282 | 2020-07-16 20:08:40 | MASTER-SAAO | (22h 38m 50.10s , -18d 03m 55.3s) | C | 60 | 19.2 |
45282 | 2020-07-16 20:08:40 | MASTER-SAAO | (22h 46m 01.07s , -18d 03m 22.7s) | C | 60 | 17.1 |
45362 | 2020-07-16 20:10:00 | MASTER-SAAO | (22h 38m 13.09s , -20d 03m 06.5s) | C | 60 | 19.2 |
45362 | 2020-07-16 20:10:00 | MASTER-SAAO | (22h 45m 29.21s , -20d 02m 33.4s) | C | 60 | 18.0 |
45442 | 2020-07-16 20:11:20 | MASTER-SAAO | (22h 39m 22.40s , -22d 04m 22.9s) | C | 60 | 19.6 |
45442 | 2020-07-16 20:11:20 | MASTER-SAAO | (22h 46m 44.51s , -22d 03m 48.5s) | C | 60 | 18.4 |
45521 | 2020-07-16 20:12:39 | MASTER-SAAO | (22h 42m 03.41s , -24d 05m 39.3s) | C | 60 | 19.8 |
45521 | 2020-07-16 20:12:39 | MASTER-SAAO | (22h 49m 32.15s , -24d 05m 03.9s) | C | 60 | 19.1 |
45601 | 2020-07-16 20:13:59 | MASTER-SAAO | (22h 46m 43.65s , -26d 05m 52.0s) | C | 60 | 19.8 |
45601 | 2020-07-16 20:13:59 | MASTER-SAAO | (22h 54m 19.84s , -26d 05m 15.2s) | C | 60 | 19.0 |
46905 | 2020-07-16 20:35:43 | MASTER-SAAO | (22h 38m 50.90s , -18d 04m 05.7s) | C | 60 | 19.6 |
46905 | 2020-07-16 20:35:43 | MASTER-SAAO | (22h 46m 01.63s , -18d 03m 33.8s) | C | 60 | 18.9 |
46985 | 2020-07-16 20:37:03 | MASTER-SAAO | (22h 38m 08.68s , -20d 05m 22.3s) | C | 60 | 19.7 |
46985 | 2020-07-16 20:37:03 | MASTER-SAAO | (22h 45m 24.81s , -20d 04m 49.1s) | C | 60 | 19.2 |
Filter C is a clear (unfiltred) band.
The observation and reduction will continue.
The message may be cited.
GCN Circular 28137
Subject
GRB 200716B: Insight-HXMT/HE detection
Date
2020-07-18T10:41:55Z (5 years ago)
From
Shuo Xiao at IHEP <xiaoshuo@ihep.ac.cn>
S. Xiao, C. Cai, Y. F. Du, Y. G. Zheng, Q. Luo, Q. B. Yi,
Y. Huang, C. K. Li, G. Li, X. B. Li, J. Y. Liao, S. L. Xiong,
C. Z. Liu, X. F. Li, Z. W. Li, Z. Chang, A. M. Zhang,
Y. F. Zhang, X. F. Lu, C. L. Zou (IHEP), Y. J. Jin,
Z. Zhang (THU), T. P. Li (IHEP/THU), F. J. Lu, L. M. Song,
M. Wu, Y. P. Xu, S. N. Zhang (IHEP),
report on behalf of the Insight-HXMT team:
At 2020-07-16T07:34:29.50 (T0), Insight-HXMT/HE detected
GRB 200716B (trigger ID: HEB200716315) in a routine search of the data,
which also triggered Fermi-GBM (Fermi GBM team, GCN 28113)
and AstroSat-CZTI (Gupta et al. GCN 28118).
The Insight-HXMT/HE light curve mainly consists of single
pulse with a duration (T90) of 3.41 s measured from T0-0.64 s.
The 1-ms peak rate, measured from T0-0.21 s, is 1026 cnts/sec.
The total counts from this burst is 2519 counts.
URL_LC: http://twiki.ihep.ac.cn/pub/HXMT/GRBList/HEB200716315_lc.jpg
All measurements above are made with the CsI detectors operating in the
regular mode with the energy range of about 80-800 keV (deposited energy).
Only gamma-rays with energy greater than about 200 keV can penetrate
the spacecraft and leave signals in the CsI detectors installed inside
of the telescope.
Insight-HXMT is the first Chinese space X-ray telescope, which was
funded jointly by the China National Space Administration (CNSA) and
the Chinese Academy of Sciences (CAS).
More information about it could be found at:
http://www.hxmt.org.