GRB 050714

D. Gotz, S. Mereghetti (IASF, Milano), S. Shaw, N. Mowlavi, M. Beck, S. 
Soldi (ISDC, Versoix) and J. Borkowski (CAMK, Torun) on behalf of the IBAS 
Localization Team report:

A 40 s long GRB has been detected by IBAS in IBIS/ISGRI data at 00:05:56 
on July 14 2005.
Its refined coordinates (J2000) are:

RA:  43.5863 [degrees]
DEC: +69.1261 [degrees]

with an uncertainty of 2.0 arcmin (90% c.l. radius).

Its preliminary peak flux (20-200 keV, 1s integration time) is about 0.3 
ph (2.6E-08 erg)/cmsq/s. Its fluence (20-200 keV, 40 s integration time) 
is 6.16E-07 erg/cmsq.

A plot of the light curve will be posted at

http://ibas.mi.iasf.cnr.it/IBAS_Results.html

This message can be cited.

S. Klose, B. Stecklum, B. Fuhrmann, F. Ludwig,
   Thueringer Landessternwarte Tautenburg, and
J. Greiner, MPE Garching,

report:

The field of GRB 050714 was observed with the Tautenburg Schmidt
telescope using for the first time the semi-robotic mode. In this mode
the telescope software is watching for a special SMS message created
in Garching which is extracted from the BACODINE notifications. As a
result, if a burst happens the coordinates of the GRB error box are
automatically uploaded into the current target data file, and the
telescope software is waiting for an OK to be given by the telescope
operator. In this respect human intervention is mandatory, so that this
mode is not fully robotic (which is indeed not forseen because of
security reasons).

Observations of GRB 050714 started at 0:24 UT on July 14, i.e. 18 min
after the onset of the burst (Gotz et al. 2005, GCN 3607
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 ). A sequence of
several I, R, and V-band images was taken starting with the I-band
(several 2 min exposures). Observations continued until 1:50 UT (twilight).

A first inspection of the combined images shows no new bright source
in the GRB error circle (90% c.l.; Gotz et al. 2005). However, we
detect two potentially variable objects. Source #1, at RA, DEC (J2000)
02:54:47.05, 69:08:04.2, is listed in the USNO-B catalogue. It is
relatively bright on our combined I-band image (we estimate I~17), and
also visible on our combined R-band image, but has no obvious
counterpart on the DSS2 red image. This object lies slightly outside
the 2' error circle. Source #2, at RA, DEC (J2000) 02:54:19.46,
69:08:59.7, has a faint DSS2-red counterpart but is notably brighter
on our R-band images than on the DSS2 red. This source lies inside the
GRB error circle.

Because of the telescope schedule in Tautenburg, no 2nd epoch observations
can be performed by the end of July.

J.L. Racusin, J.A. Kennea, D.N. Burrows (PSU), T. Roberts, K. Page (U. 
Leicester), N. Gehrels (NASA/GSFC), on behalf of the Swift XRT team:

INTEGRAL detected GRB050714 at 00:05:56 UT on July 14th 2005 (GCN Circ 
3607
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 ).  The Swift observatory executed a Target of Opportunity observation 
of the INTEGRAL position and the XRT began taking data at 13:46:16 UT, 
13.7 hours after the burst.  In preliminary ground processing of the data, 
we detect an uncatalogued apparently fading X-ray source located at:

RA(J2000) = 02 54 21.9,
Dec(J2000) = +69 06 43

We estimate an uncertainty of 9 arcseconds radius (90% containment). 
This position is 52 arcseconds from the INTEGRAL position reported in GCN 
3607
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 .

S. Klose, B. Stecklum, Thueringer Landessternwarte Tautenburg, and
J. Greiner, MPE Garching,

report:


The Tautenburg R-band image of the field of GRB 050714 (Klose et al.,
GCN 3609
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 ) shows a faint source in the revised 9 arcsec GRB error
circle (Racusin et al. 2005, GCN 3610
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 ) at RA, DEC (J2000) =
2:54:21.68, 69:06:40.3, for which we estimate R~21. This source is
not visible on the I-band image, implying I>~20. No accurate
photometry has been performed so far.