GRB111022_160722_SWIFT at TAROT Calern observatory

TAROT Calern observatory log of images

AL_20111022_194610644_000002_25305301     0 star  filter C [ 9001.4s -  9181.4s] expo=180s elev= 4.4deg humid= 88% sunelev=-34.0deg (moon at 122.0deg phase=0.31 elev=-41.0 )
AL_20111022_194920942_000002_25305301     0 star  filter C [ 9191.7s -  9371.7s] expo=180s elev= 4.0deg humid= 88% sunelev=-34.6deg (moon at 122.0deg phase=0.31 elev=-41.0 )
AL_20111022_195230949_000002_25305301     0 star  filter R [ 9381.7s -  9561.7s] expo=180s elev= 3.5deg humid= 88% sunelev=-35.1deg (moon at 121.0deg phase=0.31 elev=-41.0 )
AL_20111022_195541010_000002_25305301     0 star  filter C [ 9571.8s -  9751.8s] expo=180s elev= 3.1deg humid= 88% sunelev=-35.6deg (moon at 121.0deg phase=0.31 elev=-41.0 )
AL_20111022_195851291_000002_25305301     0 star  filter C [ 9762.1s -  9942.1s] expo=180s elev= 2.7deg humid= 89% sunelev=-36.2deg (moon at 121.0deg phase=0.31 elev=-41.0 )
AL_20111022_200202266_000002_25305301     0 star  filter R [ 9953.0s - 10133.0s] expo=180s elev= 2.2deg humid= 89% sunelev=-36.7deg (moon at 121.0deg phase=0.31 elev=-41.0 )
AL_20111022_200645828_000002_25305401     0 star  filter C [10236.6s - 10416.6s] expo=180s elev= 1.6deg humid= 88% sunelev=-37.5deg (moon at 121.0deg phase=0.31 elev=-40.0 )
AL_20111022_200956094_000002_25305401     0 star  filter C [10426.8s - 10606.8s] expo=180s elev= 1.2deg humid= 88% sunelev=-38.0deg (moon at 121.0deg phase=0.31 elev=-40.0 )
AL_20111022_201306569_000002_25305401     0 star  filter R [10617.3s - 10797.3s] expo=180s elev= 0.8deg humid= 88% sunelev=-38.5deg (moon at 121.0deg phase=0.31 elev=-40.0 )
AL_20111022_201616897_000002_25305401     0 star  filter C [10807.6s - 10987.6s] expo=180s elev= 0.3deg humid= 88% sunelev=-39.1deg (moon at 121.0deg phase=0.31 elev=-40.0 )
AL_20111022_201927148_000002_25305401     0 star  filter C [10997.9s - 11177.9s] expo=180s elev=-0.1deg humid= 88% sunelev=-39.6deg (moon at 121.0deg phase=0.31 elev=-40.0 )
AL_20111022_202237170_000002_25305401     0 star  filter R [11187.9s - 11367.9s] expo=180s elev=-1.1deg humid= 88% sunelev=-40.1deg (moon at 121.0deg phase=0.31 elev=-40.0 )
Informations from GCN notice:
This is a GRB
Date of GRB : 2455857.2174131945 2011-10-22T17:13:04.500
Date of notice : 2455857.2238888890 2011-10-22T17:22:24.000
Refined position : yes (error radius=2.5 arcsec)
RA(J2000.0) : 108.976000 07h15m54s2
DEC(J2000.0) : 49.662000 +49d39m43s19
Error box : x=-10309:-10307 y=-31781:-31780 (pixels)

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=8.756822 lat=-4.811068
NASA/IPAC-Extragalactic-Database tool for calculate an extinction

Extinction from Schlegel et al. (1998, ApJ 500, 525): E(B-V)=0.782
Assuming Rv=3.1: Av=2.591 Ar=2.090 Ai=1.517
extmap.fit: Extinction map E(B-V) from Schlegel:

Field of View is about 57 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 111022: 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 111022 detected by SWIFT
(trigger 506074) with the TAROT robotic telescope (D=25cm)
located at the Calern observatory, France.

The observations started 9001.4s after the GRB trigger
(8441.7s after the notice). The elevation of the field decreased from
4 degrees above horizon and weather conditions
were XXX.

---- NO
The date of trigger : t0 = 2011-10-22T17:13:04.224

The first image is trailed with a duration of 180.0s
(see the description in Klotz et al., 2006, A&A 451, L39).
We do not detect any OT with a limiting magnitude of:
t0+9001.4s to t0+9181.4s : R > 15.1

The second image is 180.0s exposure in tracking mode:
t0+9191.7s to t0+9371.7s : R > 16.2

We co-added a series of exposures:
t0+9191.7s to t0+10416.6s : 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 9001.4s 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=  8.7568 lat= -4.8111
and the galactic extinction in R band is 2.1 magnitudes
estimated from D. Schlegel et al. 1998ApJ...500..525S.

This message may be cited.
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