GRB111005_081218_SWIFT at TAROT Calern observatory

TAROT Calern observatory log of images

AL_20111005_180628709_000002_21803201     0 star  filter C [35979.5s - 36069.5s] expo= 90s elev= 1.0deg humid= 85% sunelev=-11.6deg (moon at  74.0deg phase=0.61 elev=+28.0 )
AL_20111005_180808770_000002_21803201     0 star  filter C [36079.5s - 36169.5s] expo= 90s elev= 0.7deg humid= 85% sunelev=-11.9deg (moon at  74.0deg phase=0.61 elev=+28.0 )
AL_20111005_180949489_000002_21803201     0 star  filter R [36180.3s - 36270.3s] expo= 90s elev= 0.5deg humid= 85% sunelev=-12.2deg (moon at  74.0deg phase=0.61 elev=+28.0 )
AL_20111005_181310739_000002_21803201     0 star  filter C [36381.5s - 36471.5s] expo= 90s elev= 0.1deg humid= 84% sunelev=-12.8deg (moon at  74.0deg phase=0.61 elev=+28.0 )
AL_20111005_181451245_000002_21803201     0 star  filter R [36482.0s - 36572.0s] expo= 90s elev=-0.2deg humid= 83% sunelev=-13.1deg (moon at  74.0deg phase=0.61 elev=+28.0 )
Informations from GCN notice:
This is a GRB
Date of GRB : 2455839.8369701388 2011-10-05T08:05:14.219
Date of notice : 2455839.8418749999 2011-10-05T08:12:17.999
Refined position : no
RA(J2000.0) : 223.284000 14h53m08s1
DEC(J2000.0) : -19.730000 -19d43m48s00

Other pages about TAROT Calern observatory observations

Status of this alert received by TAROT Calern observatory.
Sum of images.
Differential photometry.

Galactic coordinates

Galactic coordinates : lon=338.339129 lat=34.641618
NASA/IPAC-Extragalactic-Database tool for calculate an extinction

Extinction from Schlegel et al. (1998, ApJ 500, 525): E(B-V)=0.093
Assuming Rv=3.1: Av=0.309 Ar=0.249 Ai=0.181
extmap.fit: Extinction map E(B-V) from Schlegel:

Field of View is about 84 arcmin (north is NOT up !)

Bibliography (Last GCNC circulars and status of satellites)

GCN infos of this burst
GCN notice of this burst
Sloan Digital Sky Survey Observations of Gamma Ray Burst Fields
GCN info bursts
Gamma-ray burst real-time sky map
GRBlog
ROTSE last GRB images

Example of a GCNC email for this burst

gcncirc@capella.gsfc.nasa.gov
GRB 111005: TAROT Calern observatory optical observations
----------------------------------------------------------------------
Klotz A. (CESR-OMP), Gendre B. (ASDC),
Boer M. (OHP-OAMP), Atteia J.L. (LATT-OMP) report:

We imaged the field of GRB 111005 detected by SWIFT
(trigger 504779) with the TAROT robotic telescope (D=25cm)
located at the Calern observatory, France.

The observations started 35979.5s after the GRB trigger
(35555.7s after the notice). The elevation of the field decreased from
0 degrees above horizon and weather conditions
were XXX.

---- NO
The date of trigger : t0 = 2011-10-05T08:05:14.208

The first image is trailed with a duration of 90.0s
(see the description in Klotz et al., 2006, A&A 451, L39).
We do not detect any OT with a limiting magnitude of:
t0+35979.5s to t0+36069.5s : R > 15.1

The second image is 90.0s exposure in tracking mode:
t0+36079.5s to t0+36169.5s : R > 16.2

We co-added a series of exposures:
t0+36079.5s to t0+36572.0s : R > 17.7
---- YES
We detect a new fading source in the error box given by SWIFT
We detected the candidate couterpart mentioned by XXX et al. (GCNC XXXX)
at the following position (+/- 3 arcsec):

RA(J2000.0) = XXh XXm XX.XXs
DEC(J2000.0) +XXd XX' XX.X"

OT was R~XX.X at 35979.5s after GRB.
----

Magnitudes were estimated with the nearby USNO-B1 stars
and are not corrected for galactic dust extinction.

N.B. Galactic coordinates are lon=338.3391 lat=+34.6416
and the galactic extinction in R band is 0.2 magnitudes
estimated from D. Schlegel et al. 1998ApJ...500..525S.

This message may be cited.
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