GRB160221A

This page lists all entries on GRB160221A in GRBweb

Summary Fermi GBM IPN GCN 19046 GCN 19047 GCN 19049 GCN 19050 GCN 19054 GCN 19056 GCN 19073

Summary table
Variable Value Source
GRB_name_Fermi GRB160221993
T0 23:49:42 UTC GCN_circulars,INTEGRAL
ra 232.0792° IPN
decl -28.4500° IPN
pos_error 5.33e-02° IPN
T90 11.52 s Fermi_GBM
T90_error 0.923 s Fermi_GBM
T90_start 23:49:43.426 UTC Fermi_GBM
fluence 1.75e-06 erg/cm² Fermi_GBM
fluence_error 2.52e-08 erg/cm² Fermi_GBM
T100 12.946 s
GBM_located False
mjd 57439.992847222224 GCN_circulars,INTEGRAL
Fermi GBM table
GRB_name_Fermi GRB160221993
trigger_name bn160221993
ra 232.0821°
decl -28.4336°
pos_error 4.19e+00°
datum 2016-02-21
t_trigger 23:49:45.218 UTC
T90 11.52 s
T90_error 0.923 s
T90_start 23:49:43.426 UTC
fluence 1.75e-06 erg/cm²
fluence_error 2.52e-08 erg/cm²
flux_1024 4.05e+00 erg/cm²/s
flux_1024_error 2.90e-01 erg/cm²/s
flux_1024_time 2.24e+00 erg/cm²/s
flux_64 6.55e+00 erg/cm²/s
flux_64_error 1.54e+00 erg/cm²/s
IPN table
GRB_name GRB160221A
ra 232.0792°
decl -28.4500°
pos_error 5.33e-02°
GCN 19046 table
GRB_name GRB160221A
GCN_number 19046
Detection_method INTEGRAL
t_trigger 23:49:42 UTC
ra 232.0818°
decl -28.4337°
Circular_text TITLE: GCN CIRCULAR NUMBER: 19046 SUBJECT: GRB 160221A: A long GRB detected by INTEGRAL DATE: 16/02/22 00:45:34 GMT FROM: Sandro Mereghetti at IASF/CNR S.Mereghetti (IASF-Milano), D.Gotz (CEA, Saclay), C.Ferrigno, E.Bozzo, T.Favre (ISDC, Versoix), and J.Borkowski (CAMK, Torun) on behalf of the IBAS Localization Team report: a gamma ray burst lasting about 10 s has been detected by IBAS in the IBIS/ISGRI data at 23:49:42 UT of February 21, 2016. The refined coordinates (J2000) are: R.A.= 232.0818 deg DEC.= -28.4337 deg with an uncertainty of 2.5 arcmin (90% c.l.). The burst had a peak flux of 1 counts/cm2/s (20-200 keV, 1-s integration time) and a fluence in the same energy range of about 5e-7 erg/cmq. A plot of the light curve will be posted at http://ibas.iasf-milano.inaf.it/IBAS_Results.html
GCN 19047 table
GRB_name GRB160221A
GCN_number 19047
Detection_method Swift Other
Circular_text TITLE: GCN CIRCULAR NUMBER: 19047 SUBJECT: GRB 160221A: Swift ToO observations DATE: 16/02/22 05:43:18 GMT FROM: Phil Evans at U of Leicester P. A. Evans (U. Leicester) reports on behalf of the Swift team: Swift has initiated a ToO observation of the INTEGRAL GRB 160221A. Automated analysis of the XRT data will be presented online at http://www.swift.ac.uk/ToO_GRBs/00020600 Any uncatalogued X-ray sources detected in this analysis will be reported on this website and via GCN COUNTERPART notices. These are not necessarily related to the INTEGRAL event. Any X-ray source considered to be a probable afterglow candidate will be reported via a GCN Circular after manual consideration. Details of the XRT automated analysis methods are detailed in Evans et al. (2007, A&A, 469, 379; 2009, MNRAS, 397, 1177 and 2014, ApJS, 210, 8). This circular is an official product of the Swift-XRT team.
GCN 19049 table
GRB_name GRB160221A
GCN_number 19049
Detection_method Optical
Circular_text TITLE: GCN CIRCULAR NUMBER: 19049 SUBJECT: GRB 160221A: MASTER-SAAO early observations DATE: 16/02/22 10:13:47 GMT FROM: Vladimir Lipunov at Moscow State U/Krylov Obs D.Buckley, S. Potter, M.Kotze, A.Kniazev South African Astronomical Observatory E. Gorbovskoy, V. Lipunov, V.Kornilov, D.Kuvshinov, N.Tyurina, P.Balanutsa, A.Kuznetsov Lomonosov Moscow State University, Sternberg Astronomical Institute, Moscow State University A.Gabovich, V.Yurkov, Yu.Sergienko, D.Varda Blagoveschensk Educational State University, Blagoveschensk K.Ivanov, N.M.Budnev, O.Gres, V.A.Poleshchuk, S. Yazev Irkutsk State University A. Tlatov, V.Senik, A.V. Parhomenko, D. Dormidontov Kislovodsk Solar Station of the Pulkovo Observatory R. Rebolo, M. Serra-Ricart, N. Lodieu, G. Israelian The Instituto de Astrofisica de Canarias MASTER II robotic telescope (MASTER-Net: http://observ.pereplet.ru) located in SAAO was pointed to the GRB160221A (Mereghetti et. al GCN 19046) 61 sec after notice time and 74 sec after trigger time at 2016-02-21 23:51:04 UT. On our second (10s exposure) set we haven't found optical transient within INTEGRAL error-box (ra=15 28 19 dec=-28 26 40 r=0.053100). The 5-sigma upper limit has been about 16.5 mag on single (10 s images) and 19.0 on coadd image with total exposure 150 s. The message may be cited.
GCN 19050 table
GRB_name GRB160221A
GCN_number 19050
Detection_method Swift-XRT Other
ra 232.0897°
decl -28.4552°
Circular_text TITLE: GCN CIRCULAR NUMBER: 19050 SUBJECT: GRB 160221A: Swift-XRT observations DATE: 16/02/22 12:28:07 GMT FROM: Kim Page at U.of Leicester A. Melandri (INAF-OAB), D.N. Burrows (PSU), T.G.R. Roegiers (PSU), L.M. McCauley (PSU), S.L. Gibson (U. Leicester), J.P. Osborne (U. Leicester), P. D'Avanzo (INAF-OAB), V. D'Elia (ASDC) and P.A. Evans (U. Leicester) report on behalf of the Swift-XRT team: Swift-XRT has performed follow-up observations of the INTEGRAL-detected burst GRB 160221A (Mereghetti et al. GCN Circ. 19046), collecting 1.3 ks of Photon Counting (PC) mode data between T0+21.3 ks and T0+25.8 ks. One uncatalogued X-ray source has been detected inside or close to the INTEGRAL error region, it is below the RASS limit and shows no definitive signs of fading. Therefore, at the present time we cannot confirm this as the afterglow. Details of this source are given below: Source 1: RA (J2000): 232.0897 = 15:28:21.54 Dec (J2000): -28.4552 = -28:27:18.7 Error: 4.5 arcsec (radius, 90% conf.) Count-rate: 0.0151 +/- 0.0040 ct s^-1 Flux: (5.6 +/- 1.5)e-13 erg cm^-2 s^-1 (observed, 0.3-10 keV) Another uncatalogued was also detected, however this was too far from the GRB position to be the afterglow. The results of the XRT-team automatic analysis of the XRT observations, including a position-specific upper limit calculator, are available at http://www.swift.ac.uk/ToO_GRBs/00020600. This circular is an official product of the Swift-XRT team.
GCN 19054 table
GRB_name GRB160221A
GCN_number 19054
Detection_method correction
Circular_text TITLE: GCN CIRCULAR NUMBER: 19054 SUBJECT: GRB 160221A: GROND upper limits DATE: 16/02/22 15:52:10 GMT FROM: Thomas Kruehler at MPE Garching J. Bolmer, T. Kruehler, J. Greiner (all MPE Garching) report on behalf of the GROND team: We observed the field of the INTEGRAL GRB 160221A (Mereghetti et al., GCN #19046) simultaneously in g'r'i'z'JHK with GROND (Greiner et al. 2008, PASP 120, 405) mounted at the 2.2m MPG telescope at ESO La Silla Observatory (Chile). Observations started at 05:12 UT on 2016-02-22, 5.4 hrs after the GRB trigger. They were performed at an average seeing of 1.0" and at an average airmass of 1.4. No source within the Swift-XRT error circle (Melandri et al., GCN #19050) is detected. Based on 48.0 min of exposure in g'r'i'z' and 43.3 min in JHK, at a mid-time of 06:43 UT, we derive the following preliminary upper limits: g' > 23.6 mag r' > 24.3 mag i' > 23.4 mag z' > 23.4 mag J > 21.8 mag H > 21.1 mag K > 20.0 mag Given limits are in the AB system and calibrated against GROND zeropoints as well as 2MASS field stars. No correction for the expected Galactic foreground extinction corresponding to a reddening of E_(B-V)=0.26 mag in the direction of the burst (Schlafly & Finkbeiner 2011) has been applied.
GCN 19056 table
GRB_name GRB160221A
GCN_number 19056
Detection_method Fermi GBM Det
t_trigger 23:49:45.220 UTC
Circular_text TITLE: GCN CIRCULAR NUMBER: 19056 SUBJECT: GRB 160221A: Fermi GBM observation DATE: 16/02/22 17:38:49 GMT FROM: C. Michelle Hui at MSFC/Fermi-GBM C. M. Hui (NASA/MSFC) and E. Bissaldi (Politecnico & INFN Bari) report on behalf of the Fermi GBM Team: "At 23:49:45.22 UT on 21 February 2016, the Fermi Gamma-Ray Burst Monitor triggered and located GRB 160221A (trigger 477791389 / 160221993), which was also detected by INTEGRAL (Mereghetti et al., GCN 19046). The GBM on-ground location is consistent with the INTEGRAL position. The angle from the Fermi LAT boresight at the GBM trigger time is 58 degrees. The GBM light curve consists of a single pulse with a duration (T90) of about 15 s (50-300 keV). The time-averaged spectrum from T0-1.5 s to T0+5.6 s is best fit by a power law function with an exponential high-energy cutoff. The power law index is -1.15 +/- 0.16 and the cutoff energy, parameterized as Epeak, is 67 +/- 7 keV. The event fluence (10-1000 keV) in this time interval is (1.55 +/- 0.14)E-06 erg/cm^2. The 1-sec peak photon flux measured starting from T0+2.2 s in the 10-1000 keV band is 4.0 +/- 0.3 ph/s/cm^2. The spectral analysis results presented above are preliminary; final results will be published in the GBM GRB Catalog."
GCN 19073 table
GRB_name GRB160221A
GCN_number 19073
Detection_method Swift-XRT Other
ra 232.0895°
decl -28.4551°
Circular_text TITLE: GCN CIRCULAR NUMBER: 19073 SUBJECT: GRB 160221A: Swift-XRT afterglow detection DATE: 16/02/25 07:48:54 GMT FROM: Kim Page at U.of Leicester A. Melandri (INAF-OAB), D.N. Burrows (PSU), T.G.R. Roegiers (PSU), L.M. McCauley (PSU), S.L. Gibson (U. Leicester), J.P. Osborne (U. Leicester), P. D'Avanzo (INAF-OAB), V. D'Elia (ASDC) and P.A. Evans (U. Leicester) report on behalf of the Swift-XRT team: Swift-XRT has conducted further observations of the field of the INTEGRAL-detected burst GRB 160221A (Mereghetti et al. GCN Circ. 19046). The observations now extend from T0+21.3 ks to T0+274.5 ks. The source previously reported by Melandri et al. (GCN Circ. 19050), "Source 1", is fading with 3-sigma significance, and is therefore likely the GRB afterglow. The position of this source is RA, Dec=232.0895, -28.4551 which is equivalent to: RA (J2000): 15:28:21.48 Dec(J2000): -28:27:18.4 with an uncertainty of 4.1 arcsec (radius, 90% confidence). This position is 80 arcsec from the INTEGRAL position. The source is fading with alpha >0.5. The results of the XRT-team automatic analysis of the likely afterglow are at http://www.swift.ac.uk/ToO_GRBs/00020600/index_1.php. The results of the full analysis of the XRT observations are available at http://www.swift.ac.uk/ToO_GRBs/00020600. This circular is an official product of the Swift-XRT team.