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TITLE:   GCN CIRCULAR
NUMBER:  16690
SUBJECT: GRB 140815A: A long GRB detected by INTEGRAL
DATE:    14/08/15 22:58:11 GMT
FROM:    Sandro Mereghetti at IASF/CNR  <sandro@iasf-milano.inaf.it>

S.Mereghetti (IASF-Milano), D.Gotz (CEA, Saclay), C.Ferrigno, E.Bozzo, 
D.Eckert (ISDC, Versoix), and J.Borkowski (CAMK, Torun) on behalf of the 
IBAS Localization Team report:

a gamma ray burst lasting about 8 s has been detected by IBAS in the 
IBIS/ISGRI data at 21:55:05 UT of 2014 August 15.

The refined coordinates (J2000) are:
R.A.=   86.895698
DEC.=   -8.672829

with an uncertainty of  2.5   arcmin (90% c.l.).

A preliminary analysis gave a peak flux of about 1 count/cm2/s (20-200 
keV, 1-s integration time) and a fluence in the same energy range of about 
3e-7 erg/cmq.

A plot of the light curve will  be posted at
http://ibas.iasf-milano.inaf.it/IBAS_Results.html

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TITLE:   GCN CIRCULAR
NUMBER:  16691
SUBJECT: GRB 140815A: Swift-XRT observations
DATE:    14/08/16 15:16:17 GMT
FROM:    Angelica Vargas at PSU/Swift  <avargas@swift.psu.edu>

V. Mangano (PSU), A. Vargas (PSU)  reports on behalf of the Swift-XRT
team:

We have analysed 2.4 ks of XRT data for the INTEGRAL-detected burst:
GRB 140815A,  from 19.2 ks to 31.8 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 2156 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 = 86.89221, -8.68015 which is equivalent to:

RA (J2000): 05h 47m 34.13s
Dec(J2000): -08d 40' 48.5"

with an uncertainty of 2.6 arcsec (radius, 90% confidence). This
position is 29 arcsec from the INTEGRAL position.  We cannot determine
at the present time whether the source is fading.

The results of the XRT-team automatic analysis are available at
http://www.swift.ac.uk/xrt_products/00020406.

This circular is an official product of the Swift-XRT team.

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TITLE:   GCN CIRCULAR
NUMBER:  16693
SUBJECT: GRB 140815A: GROND afterglow candidate
DATE:    14/08/16 20:05:38 GMT
FROM:    Mohit Tanga at MPE/GROND  <mohit@mpe.mpg.de>

GRB 140815A: GROND afterglow candidate

J.F. Graham, M. Tanga and J. Greiner (all MPE Garching) report on behalf of
the GROND team:

We observed the field of GRB 140815A (Mereghetti et al., GCN #16690)
simultaneously in g'r'i'z'JHK with GROND (Greiner et al. 2008, PASP 120,
405) mounted at the 2.2m MPG telescope at La Silla Observatory (Chile).

Observations started at 08:17 UT on 16 August 2014, 10.37 hours after
the INTEGRAL trigger. They were performed at an average seeing of 1".3
and at an average airmass of 1.5.

We report the presence of a source within the XRT error circle
(Mangano et al., GCN #16691) at:

RA(J2000) = 86.89231 = 05h 47m 34.15s
Dec(J2000) = -8.68021 = -08d 40' 48.7"

which has the following preliminary magnitudes and upper limits (all in
AB) at a mid-time of 09:30 UT:

g' > 24.0
r' > 24.0
i' = 23.3 +/- 0.3
z' = 22.2 +/- 0.2
J  = 21.2 +/- 0.3
H  > 20.3
K  > 19.3

At the moment we cannot determine whether or not the source is fading.

Given magnitudes are calibrated against GROND zero points 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)=1.10 mag in
the direction of the burst (Schlafly & Finkbeiner 2011).