Skip to main content
New! Browse Circulars by Event, Advanced Search, Sample Codes, Schema Release. See news and announcements

GRB 200112A

GCN Circular 26711

Subject
GRB 200112A: Fermi GBM Final Real-time Localization
Date
2020-01-12T12:44:39Z (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 12:36:31 UT on 12 Jan 2020, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 200112A (trigger 600525396.101104 / 200112525).

The on-ground calculated location, using the Fermi GBM trigger data, is RA = 150.1, Dec = 64.4 (J2000 degrees, equivalent to J2000 10h 00m, 64d 24'), with a statistical uncertainty of 2.0 degrees.

The angle from the Fermi LAT boresight is 118.0 degrees.

The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2020/bn200112525/quicklook/glg_skymap_all_bn200112525.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/bn200112525/quicklook/glg_healpix_all_bn200112525.fit

The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2020/bn200112525/quicklook/glg_lc_medres34_bn200112525.gif

GCN Circular 26713

Subject
GRB 200112A: BALROG localization (Fermi Trigger 600525396 / GRB 200112525)
Date
2020-01-12T13:11:45Z (5 years ago)
From
Jochen Greiner at MPE,Garching <jcg@mpe.mpg.de>
B. Biltzinger, F. Kunzweiler, F. Berlato, J. Burgess & J. Greiner (all MPE Garching) report:

The public trigdat data of the Fermi Gamma-ray Burst Monitor (GBM) trigger
600525396 at 12:36:31 on 12 Jan. 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) = 147.7+/-6.8 deg
Decl.(2000.0) = 66.5+/-1.4 deg
We estimate an additional systematic error of 2 deg.

Further details are available at:
https://grb.mpe.mpg.de/grb/GRB200112525/

The Healpix map can be downloaded from:
https://grb.mpe.mpg.de/grb/GRB200112525/healpix

The location parameters are available as JSON at:
https://grb.mpe.mpg.de/grb/GRB200112525/json

GCN Circular 26729

Subject
GRB 200112A: AstroSat CZTI detection
Date
2020-01-13T12:11:04Z (5 years ago)
From
Ramkrishna Gaikwad at IUCAA/AstroSat <ramkrishna@iucaa.in>
R. Gaikwad, V. Sharma, A. Vibhute and D. Bhattacharya (IUCAA), V. Bhalerao (IIT-B), A. R. Rao (TIFR) and S. Vadawale (PRL) report on behalf of the AstroSat CZTI collaboration:

Analysis of AstroSat CZTI data showed the detection of a GRB 200112A, which was also detected by Fermi GBM Final Real-time Localization (GCN #26711) and BALROG localization (Biltzinger B. et al., GCN #26713).

The source was clearly detected in the 40-200 keV energy range. The light curve showed a single peak of emission peaking at 2020-01-12 12:36:31.0 UT. The measured peak count rate associated with the burst is 688 cts/s above the background in the combined data of four quadrants, with a total of 2590 cts. The local mean background count rate was 536 cts/s. Using cumulative rates, we measure a T90 of 11.9 s.

It was also clearly detected in the CsI anticoincidence (Veto) detector in the 100-500 keV energy range.

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.

Looking for U.S. government information and services? Visit USA.gov