GRB210312B

This page lists all entries on GRB210312B in GRBweb

Summary IPN GCN 29650 GCN 29651 GCN 29652 GCN 29653 GCN 29655

Summary table
Variable Value Source
T0 20:52:17 UTC GCN_circulars,INTEGRAL
ra 155.8417° IPN
decl 76.8833° IPN
pos_error 5.00e-02° IPN
redshift 1.0690
GBM_located False
mjd 59285.8696412037 GCN_circulars,INTEGRAL
IPN table
GRB_name GRB210312B
ra 155.8417°
decl 76.8833°
pos_error 5.00e-02°
redshift 1.0690
GCN 29650 table
GRB_name GRB210312B
GCN_number 29650
Detection_method INTEGRAL
t_trigger 20:52:17 UTC
ra 155.8431°
decl 76.8714°
Circular_text TITLE: GCN CIRCULAR NUMBER: 29650 SUBJECT: GRB 210312B: A long GRB detected by INTEGRAL DATE: 21/03/12 22:02:02 GMT FROM: Sandro Mereghetti at IASF-Milano/INAF S.Mereghetti (INAF, IASF-Milano), D.Gotz (CEA, Saclay), C.Ferrigno, E.Bozzo, V.Savchenko (ISDC, Versoix), L.Ducci (IAAT, Germany and ISDC, Versoix) and J.Borkowski (CAMK, Torun) report: a gamma ray burst lasting about 5 s has been detected by IBAS in the IBIS/ISGRI data at 20:52:17 UT of March 12, 2021 The refined coordinates (J2000) are: R.A.= 155.8431 deg DEC.= +76.8714 deg with an uncertainty of 2 arcmin (90% c.l.). The burst had a peak flux of about 1.5 ph/cm2/s (20-200 keV, 1-s integration time) and a fluence in the same energy range of about 2e-7 erg/cm2 A plot of the light curve will be posted at http://ibas.iasf-milano.inaf.it/IBAS_Results.html
GCN 29651 table
GRB_name GRB210312B
GCN_number 29651
Detection_method Optical
Circular_text TITLE: GCN CIRCULAR NUMBER: 29651 SUBJECT: GRB210312B (Integral alert 9073): Candidate optical afterglow by Ondrejov D50 DATE: 21/03/12 22:05:41 GMT FROM: Martin Jelinek at Astro.Inst-AVCR,Ondrejov M. Jelinek, J. Strobl, S. Trcka, R. Hudec, C. Polasek (ASU CAS Ondrejov) report: We observed the position of the Integral trigger 9073 (GRB 210312.87 or B) with the D50 robotic telescope of the Astronomical Institute Ondrejov, near Prague, Czech Republic. We performed a series of 10s and 20s unfiltered exposures starting 23.8 s after the trigger. In the first images we detect a rapidly fading object not present in the DSS catalogue at 10:23:15.312 +76:52:06.96 J2000. The preliminary magnitude of the object in the earliest images was R~18m.
GCN 29652 table
GRB_name GRB210312B
GCN_number 29652
Detection_method Optical
Circular_text TITLE: GCN CIRCULAR NUMBER: 29652 SUBJECT: GRB 210312B: MASTER OT confirmation DATE: 21/03/12 22:55:02 GMT FROM: Vladimir Lipunov at Moscow State U/Krylov Obs V. Lipunov, V.Kornilov, E.Gorbovskoy,N.Tiurina,P.Balanutsa,F.Balakin, V.Vladimirov, A.Kuznetsov,K.Zhirkov,D. Vlasenko, I.Gorbunov, D.Zimnukhov, V.Senik, A.Chasovnikov,A.Pozdnyakov,V.Topolev, D.Cheryasov(Lomonosov Moscow State University, SAI, Physics Department), D. Buckley (South African Astronomical Observatory), R. Podesta, C.Lopez, F. Podesta, C.Francile (Observatorio Astronomico FelixAguilar OAFA), R. Rebolo, M. Serra(The Instituto de Astrofisica de Canarias), O.A. Gres, N.M. Budnev (Irkutsk State University, API), A. Tlatov, D. Dormidontov (Kislovodsk Solar Station of the Pulkovo Observatory), A. Gabovich, V.Yurkov (Blagoveschensk Educational StateUniversity) MASTER Global robotic net (MASTER-Net:http://observ.pereplet.ru Lipunov et al.,2010,Advances in Astronomy,2010,30L) automatically started (Lipunov et al. GCN 29649) Integral GRB 210312B (Mereghetti et al. GCN 29650,Ttrigger=20:52:17UT) optical observations at MASTER-Kislovodsk at 2021-03-12 20:52:58 UT 27s after notice time(41s after trigger time), and at MASTER-Tunka at 2021-03-12 20:52:58UT with mli18.7 at first 10s images. We confirm Jelinek et al. GCN 29651 (Ondrejov) optical counterpart with unfiltered m_OT=18.2 at first image. This message may be cited.
GCN 29653 table
GRB_name GRB210312B
GCN_number 29653
Detection_method INTEGRAL
Circular_text TITLE: GCN CIRCULAR NUMBER: 29653 SUBJECT: GRB 210312B: GTC photometry DATE: 21/03/13 00:51:28 GMT FROM: Alexander Kann at IAA-CSIC D. A. Kann (HETH/IAA-CSIC), A. de Ugarte Postigo (HETH/IAA-CSIC, DARK/NBI), C. C. Thoene, M. Blazek, J. F. Agui Fernandez (all HETH/IAA-CSIC), and R. Scarpa (GTC) report: We observed the afterglow (Jelinek et al., GCN #29651; Lipunov et al., GCN #29652) of INTEGRAL GRB 210312B (Mereghetti et al., GCN #29650) with OSIRIS at the 10.4m Gran Telescopio Canarias (Roque de los Muchachos Observatory, La Palma, Canary Islands, Spain), starting at 2021-03-12 22:57:10.834 UT. We obtained a 60 s finding chart exposure under adverse conditions (2" seeing, bad transparency because of Calima). In the image, the afterglow is clearly detected. Against a nearby PanSTARRS star, we measure r' = 21.52 +/- 0.06 mag at 2.0898 hr after the trigger (0.08708 days).
GCN 29655 table
GRB_name GRB210312B
GCN_number 29655
Detection_method INTEGRAL
redshift 1.0690
Circular_text TITLE: GCN CIRCULAR NUMBER: 29655 SUBJECT: GRB 210312B: Redshift from OSIRIS/GTC DATE: 21/03/13 13:13:31 GMT FROM: Alexander Kann at IAA-CSIC D. A. Kann (HETH/IAA-CSIC), A. de Ugarte Postigo (HETH/IAA-CSIC, DARK/NBI), C. C. Thoene, M. Blazek, J. F. Agui Fernandez (all HETH/IAA-CSIC), and R. Scarpa (GTC) report: We observed the afterglow (Jelinek et al., GCN #29651; Lipunov et al., GCN #29652) of INTEGRAL GRB 210312B (Mereghetti et al., GCN #29650) with OSIRIS at the 10.4m Gran Telescopio Canarias (Roque de los Muchachos Observatory, La Palma, Canary Islands, Spain), starting at 2021-03-12 22:57:10.834 UT under adverse conditions (2" seeing, bad transparency because of Calima). Following the finding chart exposure (Kann et al., GCN #29653), we obtained 2 x 900 s spectroscopic exposures with the R1000B grism, covering the spectral range from 3700 to 7800 AA, before the telescope was shut down due to worsening observing conditions. We detect a faint trace in both images. We resumed observations after an improvement in weather conditions at 2021-03-13 01:41:40.281 UT, obtaining two further finding charts and 4 x 900 s spectra with the same grism. Using the same comparison star as Kann et al., GCN #29653, we find the afterglow has faded to r' = 22.36 +/- 0.03 mag (AB) at 4.8316 hrs after the GRB trigger. Combining the first spectral exposure and the latter, for a total exposure of 5 x 900 s, a trace is clearly detected redwards of 4300 AA, as well as several absorption lines. We identify these as FeII, MgII, and MgI, at a mean redshift of z = 1.069. At this redshift, we also detect OII in emission, which allows us to identify this as the redshift of the GRB.