GRB 160401A
GCN Circular 19251
Subject
GRB 160401A: a long GRB detected by INTEGRAL
Date
2016-04-01T21:32:32Z (9 years ago)
From
Sandro Mereghetti at IASF/CNR <sandro@iasf-milano.inaf.it>
S.Mereghetti (IASF-Milano), D.Gotz (CEA, Saclay), C.Ferrigno, E.Bozzo
(ISDC, Versoix), and J.Borkowski (CAMK, Torun) on behalf of the IBAS
Localization Team report:
a gamma ray burst lasting about 130 s has been detected by IBAS in the
IBIS/ISGRI data at 20:20:30 UT of April 1, 2016.
The refined coordinates (J2000) are:
R.A.= 89.7377 deg
DEC.= 26.6758 deg
with an uncertainty of 2 arcmin (90% c.l.).
The burst had a peak flux of 0.7 counts/cm2/s (20-200 keV, 1-s integration
time) and a fluence in the same energy range of about 1e-6 erg/cmq.
A plot of the light curve will be posted at
http://ibas.iasf-milano.inaf.it/IBAS_Results.html
GCN Circular 19252
Subject
GRB 160401A: MASTER-IAC prompt optical observations
Date
2016-04-01T22:07:26Z (9 years ago)
From
Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>
R. Rebolo, M. Serra Ricart, N. Lodieu, G. Israelian
The Instituto de Astrofisica de Canarias
V. Lipunov, E.Gorbovskoy, V.Kornilov, D.Kuvshinov, N.Tyurina, P.Balanutsa,
A.Kuznetsov, V.V.Chazov
Lomonosov Moscow State University,
Sternberg Astronomical Institute, Moscow State University
A. Tlatov, A.V. Parhomenko, D. Dormidontov, V.Senik
Kislovodsk Solar Station of the Pulkovo Observatory
K.Ivanov, S.Yazev, N.M.Budnev, O.Gres, O.Chuvalaev, V.A.Poleshchuk
Irkutsk State University
V.Yurkov, Yu.Sergienko, A.Gabovich
Blagoveschensk Educational State University, Blagoveschensk
D.Buckley, S. Potter, A.Kniazev, M.Kotze
South African Astronomical Observatory
Hugo Levato and Carlos Saffe
Instituto de Ciencias Astronomicas, de la Tierra y del Espacio (ICATE)
Claudio Mallamaci, Carlos Lopez and Federico Podest
Observatorio Astronomico Felix Aguilar (OAFA)
MASTER-IAC robotic telescope (MASTER-Net: http://observ.pereplet.ru)
located in Teyde observatory was pointed to the GRB160401.85 (Mereghetti
et al., GCN 19251) 7 sec after
notice time
and 15 sec after trigger time at 2016-04-01 20:20:57 UT. On our first (10s
exposure) set we didn't find new optical transient within
INTEGRAL error-box
(ra=05 59 00 dec=+26 41 11 r=0.054) brighter then 16.3 (5-sigma upper
limit).
The message may be cited.
GCN Circular 19253
Subject
GRB 160401A: Swift ToO observations
Date
2016-04-02T08:18:21Z (9 years ago)
From
Phil Evans at U of Leicester <pae9@leicester.ac.uk>
P. A. Evans (U. Leicester) reports on behalf of the Swift team:
Swift has initiated a ToO observation of the INTEGRAL GRB 160401A.
Automated analysis of the XRT data will be presented online at
http://www.swift.ac.uk/ToO_GRBs/00020603
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 Circular 19254
Subject
GRB 160401A: LT observations
Date
2016-04-02T14:04:12Z (9 years ago)
From
Cristiano Guidorzi at Ferrara U,Italy <guidorzi@fe.infn.it>
C. Guidorzi (U. Ferrara), A. Gomboc (U. Nova Gorica), S. Kobayashi
(LJMU), C.G. Mundell (U. Bath), on behalf of a large collaboration report:
The 2-m Liverpool Telescope automatically began observing INTEGRAL GRB
160401A (Mereghetti et al. GCN 19251) on April 01, 20:23:44 UT, i.e. 3.2
minutes since the GRB trigger time. From the subtraction of two 3x10-s
r-band frames taken at 46 and 68 minutes post GRB trigger we do not
detect any uncatalogued, significantly variable object within the
INTEGRAL error circle down to r~20 mag calibrated against nearby USNOB-1
stars, in agreement with previous reports (Rebolo et al. GCN 19252).
GCN Circular 19255
Subject
GRB 160401A: Zadko observatory - Gingin optical observations
Date
2016-04-02T14:19:27Z (9 years ago)
From
Alain Klotz at IRAP-CNRS-OMP <Alain.Klotz@free.fr>
Klotz A., Turpin D., Atteia J.L. (CNRS-OMP-IRAP),
Boer, M., Laugier, R. (CNRS-ARTEMIS),
Gendre B. (UVI - Etelman Obs.),
Coward, D. McPherson, D. Williams A., Martin R.,
Moore J., Dodson R. (UWA) report:
We imaged the field of GRB 160401A detected by Integral
(Mereghetti et al. GCNC 19251) with the Zadko robotic
telescope (D=100cm) located at the observatory - Gingin,
Australia.
The observations started 0.63 day after the GRB trigger
as soon as the night became. The elevation of the field
decreased from 27 degrees above horizon and weather
conditions were good.
We co-added a series of exposures. We did not observed
any new optical source than those in the SDSS in a radius of
2 arcmin centered ont the position RA=05:58:57 Dec=+26:40:33
J2000.0:
t1(d) t2(d) Rmag_lim
0.63 0.66 19.0
Magnitudes were estimated with the nearby USNO-B1 stars
and are not corrected for galactic dust extinction.
N.B. Galactic coordinates are lon=183.4 lat= +1.4
GCN Circular 19256
Subject
GRB 160401A: Swift/UVOT Upper Limits
Date
2016-04-02T20:08:19Z (9 years ago)
From
Paul Kuin at MSSL <npkuin@gmail.com>
Paul Kuin (MSSL/UCL) and L.M. McCauley (PSU) report on behalf of the
Swift/UVOT team:
The Swift/UVOT began settled observations of the field of GRB 160401A
43ks s after the INTEGRAL trigger (Mereghetti et al., GCN Circ.19251).
No optical afterglow consistent with the INTEGRAL position is detected
in the initial UVOT exposures. The burst location was also observed by
MASTER-IAC (Rebolo et al., GCN Circ. no. 19252); LT (Guidorzi et al.
GCN Circ. no. 19254), and the Zadko observatory (Klotz et al. GCN
Circ. 19255); none of whom observed an afterglow.
Preliminary 3-sigma upper limits using the UVOT photometric system
(Breeveld et al. 2011, AIP Conf. Proc. 1358, 373) for the initial exposures
are:
Filter T_start(s) T_stop(s) Exp(s) Mag
white 43678 44209 522 >20.8
v 44509 45370 843 >19.5
u 42847 43671 811 >19.9
The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 1.13 in the direction of the burst
(Schlegel et al. 1998).
[GCN OPS NOTE(02apr16): The letter 'A' was added to the GRB name.]
GCN Circular 19257
Subject
GRB 160401A: Swift-XRT observations
Date
2016-04-03T15:29:59Z (9 years ago)
From
Marissa McCaule at PSU <marissamc@swift.psu.edu>
L.M. McCauley (PSU), J.A. Kennea (PSU), B. Sbarufatti (INAF-OAB/PSU),
S.L. Gibson (U. Leicester), J.P. Osborne (U. Leicester), K.L. Page (U.
Leicester), V. D'Elia (ASDC), A. D'Ai (INAF-IASFPA), A. Maselli
(INAF-IASFPA) 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 160401A (Mereghetti et al. GCN Circ. 19251), collecting 2.9
ks of Photon Counting (PC) mode data between T0+42.9 ks and T0+49.1 ks.
No X-ray sources have been detected inside or close to the INTEGRAL
error region. The 3-sigma upper limit in the field ranges from ~0.003
to ~0.005 ct s^-1, corresponding to a 0.3-10 keV observed flux of
1.3e-13 to 1.9e-13 erg cm^-2 s^-1 (assuming a typical GRB spectrum).
Four uncatalogued sources were detected too far from the GRB position
to be likely afterglow candidates.
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/00020603.
This circular is an official product of the Swift-XRT team.