GRB 050714A
GCN Circular 3608
Subject
GRB 050714A: ROTSE-III Optical Limits
Date
2005-07-14T01:31:23Z (20 years ago)
From
Brad Schaefer at LSU <schaefer@grb.phys.lsu.edu>
B. Schaefer (Louisiana State), S.A. Yost (U Mich), H. Swan (U Mich), E.S.
Rykoff (U Mich), report on behalf of the ROTSE collaboration:
ROTSE-IIId, located at the Turkish National Observatory at Bakirlitepe,
Turkey, responded to GRB 050714A (Integral trigger 2598), producing images
beginning 9.1 s after the GCN notice time. An automated response took the
first image at 00:06:33.1 UT, 27.9 s after the burst, under excellent
conditions. We took 10 5-sec, 10 20-sec and 60 60-sec eposures. These
unfiltered images are calibrated relative to USNO A2.0 (R).
Comparison to the DSS (second epoch) reveals no new sources within the
3-sigma error circle, for both single images and coadding into sets of 10.
Individual images have limiting magnitudes ranging from 16.5-17.9; we set
the following specific limits.
start UT end UT t_exp(s) mlim t_start-tGRB(s) Coadd?
--------------------------------------------------------------------
00:06:33.1 0:06:38.1 5 16.6 27.9 N
00:06:33.1 0:08:55.1 142 18.2 27.9 Y
GCN Circular 3649
Subject
GRB 050714a: Refined XRT analysis and afterglow confirmation
Date
2005-07-19T19:59:34Z (20 years ago)
From
Tim Roberts at Leicester U/BA <tro@star.le.ac.uk>
T.P. Roberts, K. Page, A. Beardmore (U. Leicester), J.L. Racusin,
J.A. Kennea (PSU), N. White (GSFC), D. Hinshaw (GSFC-SPSYS) report on
behalf of the Swift XRT team:
We have re-analysed the complete Swift dataset from the TOO
observation of the INTEGRAL-detected GRB050714a (see GCN circ. 3610),
beginning 13.7 hours after the burst. The new refined coordinates of
the afterglow candidate are:
RA(J2000) = 02 54 22.2
Dec(J2000) = +69 06 46
We estimate an uncertainty of 6.9 arcseconds on this position (90%
containment). However, we were unable establish from this data whether
the source was definitely fading due its low count rate.
Swift began a second observation of this GRB at 00:05 UT on 19th July
2005 (5.0 days since the burst event). In 9.7 ks of data we do not
detect the candidate afterglow. Hence we confirm that the behaviour
of the X-ray source identified in our first circular is consistent
with it being the afterglow of GRB 050714a.
GCN Circular 3789
Subject
RBO GRB 050714A and GRB 050716 observations
Date
2005-08-13T12:09:45Z (20 years ago)
From
Ron Canterna at U of Wyoming <canterna@uwyo.edu>
C. Rodgers, E. Hausel, D. Allen and R. Canterna report on behalf of
the Red Buttes Observatory GRB Team as
part of the FUN GRB Collaboration. We responded to GRB 050714A (GCN 3607) at
05:11:41 UT with a series of 10 minute R and I exposures centered on
the positon of the original
Integral GRB Position under excellent conditions. No new source was
detected after comparison with DSS.
UT Time Since Filter Limiting
Start GRB Magnitude
05:11 5:06 I 17.4
05:33 5:28 R 18.4
05:43 5:38 R 18.4
We also responded to GRB 050716 (GCN 3623) at 2005-07-17 05:52:03 UT.
We took a series of 5 and 10 minute
exposures in R and I with limiting magnitues of 18.6 in R and 17.4 in
I. These observations were started 17
hours after the BAT trigger. No new source was
detected after comparison with DSS.
10 sigma limiting magnitudes were derived from the USNO-B1.0 catalogue