GRB111117_121427_SWIFT at TAROT Calern observatory

TAROT Calern observatory log of images

AL_20111117_232120868_000002_30847701    25 stars filter C [1690415.8s - 1690595.8s] expo=180s elev=50.8deg humid= 60% sunelev=-65.3deg (moon at 117.0deg phase=0.54 elev=+11.0 )
AL_20111117_232430913_000002_30847701    22 stars filter R [1690605.8s - 1690785.8s] expo=180s elev=50.3deg humid= 58% sunelev=-65.3deg (moon at 117.0deg phase=0.54 elev=+11.0 )
AL_20111117_232740944_000002_30847701    19 stars filter V [1690795.9s - 1690975.9s] expo=180s elev=49.7deg humid= 56% sunelev=-65.2deg (moon at 117.0deg phase=0.54 elev=+12.0 )
AL_20111117_234602753_000002_30847801    27 stars filter C [1691897.6s - 1692077.6s] expo=180s elev=46.5deg humid= 39% sunelev=-64.6deg (moon at 117.0deg phase=0.54 elev=+15.0 )
AL_20111117_234912753_000002_30847801    23 stars filter R [1692087.7s - 1692267.7s] expo=180s elev=46.0deg humid= 36% sunelev=-64.5deg (moon at 117.0deg phase=0.54 elev=+15.0 )
AL_20111117_235223298_000002_30847801    17 stars filter V [1692278.2s - 1692458.2s] expo=180s elev=45.4deg humid= 37% sunelev=-64.3deg (moon at 117.0deg phase=0.54 elev=+16.0 )
AL_20111118_001106077_000002_30847901    26 stars filter C [1693401.0s - 1693581.0s] expo=180s elev=42.1deg humid= 47% sunelev=-62.9deg (moon at 117.0deg phase=0.54 elev=+19.0 )
AL_20111118_001416525_000002_30847901    22 stars filter R [1693591.5s - 1693771.5s] expo=180s elev=41.5deg humid= 47% sunelev=-62.7deg (moon at 117.0deg phase=0.54 elev=+20.0 )
AL_20111118_001727088_000002_30847901    19 stars filter V [1693782.0s - 1693962.0s] expo=180s elev=40.9deg humid= 47% sunelev=-62.4deg (moon at 117.0deg phase=0.54 elev=+20.0 )
AL_20111118_003555336_000002_30848001    25 stars filter C [1694890.3s - 1695070.3s] expo=180s elev=37.6deg humid= 55% sunelev=-60.5deg (moon at 117.0deg phase=0.54 elev=+24.0 )
AL_20111118_003905835_000002_30848001    18 stars filter R [1695080.8s - 1695260.8s] expo=180s elev=37.0deg humid= 52% sunelev=-60.1deg (moon at 117.0deg phase=0.54 elev=+24.0 )
AL_20111118_004216335_000002_30848001    18 stars filter V [1695271.3s - 1695451.3s] expo=180s elev=36.5deg humid= 45% sunelev=-59.7deg (moon at 117.0deg phase=0.54 elev=+25.0 )
Informations from GCN notice:
This is a GRB
Date of GRB : 2455863.9060240742 2011-10-29T09:44:40.480
Date of notice : 2455863.9072916666 2011-10-29T09:46:29.999
Refined position : yes (error radius=4.4 arcsec)
RA(J2000.0) : 44.782000 02h59m07s6
DEC(J2000.0) : 57.110000 +57d06m36s00
Error box : x=-23800:-23797 y=49599:49601 (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=122.743489 lat=-39.850420
NASA/IPAC-Extragalactic-Database tool for calculate an extinction

Extinction from Schlegel et al. (1998, ApJ 500, 525): E(B-V)=0.123
Assuming Rv=3.1: Av=0.409 Ar=0.330 Ai=0.239 Extinction map E(B-V) from Schlegel:

Field of View is about 92 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
ROTSE last GRB images

Example of a GCNC email for this burst
GRB 111117: 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 111117 detected by SWIFT
(trigger 506519) with the TAROT robotic telescope (D=25cm)
located at the Calern observatory, France.

The observations started 1690415.8s after the GRB trigger
(1690305.9s after the notice). The elevation of the field decreased from
50 degrees above horizon and weather conditions
were XXX.

---- NO
The date of trigger : t0 = 2011-10-29T09:44:40.128

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+1690415.8s to t0+1690595.8s : R > 15.1

The second image is 180.0s exposure in tracking mode:
t0+1690605.8s to t0+1690785.8s : R > 16.2

We co-added a series of exposures:
t0+1690605.8s to t0+1693581.0s : 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 1690415.8s 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=122.7435 lat=-39.8504
and the galactic extinction in R band is 0.3 magnitudes
estimated from D. Schlegel et al. 1998ApJ...500..525S.

This message may be cited.