GRB 130513A
GCN Circular 14647
Subject
GRB 130513A: Bassano Bresciano optical upper limit
Date
2013-05-14T21:49:31Z (13 years ago)
From
Ulisse Quadri at Bassano Bresciano Obs <oabb@ulisse.bs.it>
U.Quadri, L.Strabla, R.Girelli and A.Quadri report:
We imaged the field of GRB 130513A (INTEGRAL trigger 6842; Mereghetti et
al., GCN 14630) with the robotic telescope of (IAU station 565)
Bassano Bresciano Observatory, Italy.
The observations started (after the dusk) 12h 19m after the
GRB trigger, with our Schmidt telescope D=400 mm F/D=3
Weather conditions were very good.
We co-added 2 series of 10 unfiltered CCD exposures of 120s each.
We did not found any optical counterpart in the
Swift-XRT error circle (Evans & Marshall, GCN
Circular 14635) at our following limiting magnitude:
.
Start End Mlim
T0+ T0+
12.3h 13.0h 19.0
Magnitudes were estimated with the USNO-B1 cat.
and are not corrected for galactic dust extinction.
The message may be cited.
GCN Circular 14642
Subject
GRB 130513A: RATIR Optical and NIR Observations
Date
2013-05-14T18:05:39Z (13 years ago)
Edited On
2024-11-07T20:01:55Z (a year ago)
From
Alan M. Watson at Instituto de Astronomia UNAM <alan@astro.unam.mx>
Edited By
Vidushi Sharma at NASA GSFC/UMBC <vidushi.sharma@nasa.gov> on behalf of Leo P. Singer at NASA/GSFC <leo.p.singer@nasa.gov>
Nat Butler (ASU), Alan M. Watson (UNAM), Alexander Kutyrev (GSFC),
William H. Lee (UNAM), Michael G. Richer (UNAM), Chris Klein (UCB),
Ori Fox (UCB) J. Xavier Prochaska (UCSC), Josh Bloom (UCB), Antonino
Cucchiara (UCSC), Eleonora Troja (GSFC), Owen Littlejohns (ASU), Enrico
Ramirez-Ruiz (UCSC), José A. de Diego (UNAM), Leonid Georgiev (UNAM),
Jesús González (UNAM), Carlos Román-Zúñiga (UNAM), Neil Gehrels (GSFC),
and Harvey Moseley (GSFC) report:
We observed the field of GRB 130513A (Mereghetti, et al., GCN Circular
14630) with the Reionization and Transients Infrared Camera (RATIR;
www.ratir.org) on the 1.5m Harold Johnson Telescope at the Observatorio
Astronómico Nacional on Sierra San Pedro Mártir from 2013/05 14.15 to
2013/05 14.16 UTC (19.97 to 20.30 hours after the BAT trigger),
obtaining a total of 0.18 hours exposure in the r' and i' bands and 0.07
hours exposure in the Z, Y, J, and H bands.
For a source within the Swift-XRT error circle (Evans & Marshall, GCN
Circular 14635), in comparison with USNO-B1 and 2MASS, we obtain the
following upper limits (3-sigma):
r' > 22.64
i' > 22.65
Z > 21.34
Y > 20.65
J > 20.26
H > 19.71
These magnitudes are in the AB system and not corrected for Galactic
extinction in the direction of the GRB.
We thank the staff of the Observatorio Astronómico Nacional in San Pedro
Mártir.
GCN Circular 14641
Subject
GRB 130513A: Swift/UVOT Upper Limits
Date
2013-05-14T17:31:32Z (13 years ago)
From
Frank Marshall at GSFC <femarsha@khamseen.gsfc.nasa.gov>
F. E. Marshall (NASA/GSFC) reports on behalf of the Swift team:
The Swift/UVOT began settled observations of the field of GRB 130513A
25261 s after the INTEGRAL trigger (Mereghetti et al., GCN Circ. 14630).
No optical afterglow consistent with the XRT position
(Evans and Marshall GCN Circ. 14635)
is detected in the initial UVOT exposures.
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 25885 32269 1218 >21.9
v 26510 32924 1267 >20.6
u 25261 37138 1399 >21.6
The magnitudes in the table are not corrected for the Galactic
extinction
due to the reddening of E(B-V) = 0.03 in the direction of the burst
(Schlegel et al. 1998).
GCN Circular 14639
Subject
GRB 130513A: GROND observations
Date
2013-05-14T16:20:57Z (13 years ago)
From
Alexander Kann at TLS Tautenburg <kann@tls-tautenburg.de>
S. Schmidl, D. A. Kann (both TLS Tautenburg) and J. Greiner (MPE Garching)
report on behalf of the GROND team:
We observed the field GRB 130513A (INTEGRAL trigger 6842; Mereghetti et
al., GCN 14630) simultaneously in g'r'i'z'JHKs with GROND (Greiner et al.
2008, PASP 120, 405) mounted at the 2.2 m MPG/ESO telescope at La Silla
Observatory (Chile).
Observations started in twilight at 22:54:57 UT on May 13th, 15.3 hours
after the IBAS trigger. They were performed at an average seeing of 1".0
and at an average airmass of 1.1.
Inside the 2".7 refined XRT error circle (Evans et al., GCN 14635), we do
not detect any sources. Based on an observation with 1500 s integration
time in g'r'i'z' and 1200 s integration time in JHK, centered at 0.6959
days after the trigger, we estimate preliminary 3-sigma upper limits (all
in AB system) of
g' > 25.4,
r' > 24.9,
i' > 24.2,
z' > 23.9,
J > 21.4,
H > 20.6 and
K > 20.2.
We note that if the XRT source is indeed the afterglow, then it is very
faint optically. Galactic extinction is negligible.
Given magnitudes are calibrated against GROND zero points (g'r'i'z') as
well as 2MASS field stars (JHK) and are not corrected for the expected
Galactic foreground extinction corresponding to a reddening of
E_(B-V)=0.03 mag in the direction of the burst (Schlegel et al. 1998).
GCN Circular 14635
Subject
GRB 130513A: Swift-XRT detection of the afterglow.
Date
2013-05-14T08:42:09Z (13 years ago)
From
Phil Evans at U of Leicester <pae9@leicester.ac.uk>
P.A. Evans (U. Leicester) and F. E. Marshall (NASA/GSFC) report on
behalf of the Swift-XRT team:
We have analysed 3.9 ks of XRT data for the INTEGRAL-detected burst:
GRB 130513A (Mereghetti et al., GCN 14630), from 25.4 ks to 37.2 ks
after the INTEGRAL trigger. The data are entirely in Photon Counting
(PC) mode. An X-ray source is detected within the INTEGRAL error
circle. Using 2486 s of PC mode data and 2 UVOT images, we find an
enhanced XRT position (using the XRT-UVOT alignment and matching UVOT
field sources to the USNO-B1 catalogue): RA, Dec = 144.76167, -5.24171
which is equivalent to:
RA (J2000): 09h 39m 02.80s
Dec(J2000): -05d 14' 30.1"
with an uncertainty of 2.7 arcsec (radius, 90% confidence). This
position is 49 arcsec from the INTEGRAL position.
The source is fading, and the light curve can be modelled with a
power-law of index 3.3 (+1.1, -0.45). We therefore conclude that it is
the afterglow of the GRB.
We detect only 24 photons from this source, so the spectrum is poorly
constrained. The photon index is 2.9 (+2.1, -1.1); the absorption is
consistent with the Galactic value of 3.4e20 cm^-2 (Kalberla et al.
2005) however within the errors on the spectral fit, could be as high
as 5e21 cm^-2.
The results of the XRT-team automatic analysis are available at
http://www.swift.ac.uk/xrt_products/00020274.
This circular is an official product of the Swift-XRT team.
GCN Circular 14630
Subject
GRB 130513A: a long GRB detected by INTEGRAL
Date
2013-05-13T09:10:32Z (13 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,
P.Bordas (ISDC, Versoix), and J.Borkowski (CAMK, Torun) on behalf of the
IBAS Localization Team report:
a gamma ray burst lasting about 50 s has been detected by IBAS in the
IBIS/ISGRI data at 07:38:00 UT of May 13.
The refined coordinates (J2000) are:
R.A.= 144.77525 deg
DEC.= -5.24393 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