GRB110829_234522_SWIFT at TAROT Calern observatory

TAROT Calern observatory log of images

AL_20110829_234611061_110829_23450    49 stars filter C [  264.4s -   294.4s] expo= 30s elev=13.2deg humid= 32% sunelev=-36.9deg (moon at 111.0deg phase=0.07 elev=-46.0 )
AL_20110829_234652035_110829_23450    50 stars filter C [  305.4s -   335.4s] expo= 30s elev=13.0deg humid= 33% sunelev=-36.9deg (moon at 111.0deg phase=0.07 elev=-46.0 )
AL_20110829_234732769_110829_23450    44 stars filter C [  346.1s -   376.1s] expo= 30s elev=12.9deg humid= 33% sunelev=-36.9deg (moon at 111.0deg phase=0.07 elev=-46.0 )
AL_20110829_234813504_110829_23450    45 stars filter C [  386.9s -   416.9s] expo= 30s elev=12.8deg humid= 33% sunelev=-36.9deg (moon at 111.0deg phase=0.07 elev=-46.0 )
AL_20110829_234854503_110829_23450    43 stars filter C [  427.8s -   457.8s] expo= 30s elev=12.7deg humid= 33% sunelev=-36.8deg (moon at 111.0deg phase=0.08 elev=-46.0 )
AL_20110829_234935207_110829_23450    48 stars filter C [  468.6s -   498.6s] expo= 30s elev=12.6deg humid= 33% sunelev=-36.8deg (moon at 111.0deg phase=0.08 elev=-46.0 )
AL_20110830_000751154_000002_14724201    50 stars filter C [ 1504.5s -  1594.5s] expo= 90s elev= 9.7deg humid= 32% sunelev=-36.4deg (moon at 110.0deg phase=0.08 elev=-46.0 )
AL_20110830_000931638_000002_14724201    52 stars filter C [ 1605.0s -  1695.0s] expo= 90s elev= 9.4deg humid= 32% sunelev=-36.3deg (moon at 110.0deg phase=0.08 elev=-46.0 )
AL_20110830_001112154_000002_14724201    34 stars filter R [ 1705.5s -  1795.5s] expo= 90s elev= 9.1deg humid= 32% sunelev=-36.3deg (moon at 110.0deg phase=0.08 elev=-46.0 )
AL_20110830_001252654_000002_14724201    51 stars filter C [ 1806.0s -  1896.0s] expo= 90s elev= 8.8deg humid= 31% sunelev=-36.2deg (moon at 110.0deg phase=0.08 elev=-46.0 )
AL_20110830_001433655_000002_14724201    42 stars filter C [ 1907.0s -  1997.0s] expo= 90s elev= 8.6deg humid= 31% sunelev=-36.2deg (moon at 110.0deg phase=0.08 elev=-46.0 )
AL_20110830_001614123_000002_14724201    33 stars filter R [ 2007.5s -  2097.5s] expo= 90s elev= 8.3deg humid= 31% sunelev=-36.1deg (moon at 110.0deg phase=0.08 elev=-46.0 )
AL_20110830_002409827_000002_14724301    35 stars filter C [ 2393.2s -  2573.2s] expo=180s elev= 7.1deg humid= 30% sunelev=-35.8deg (moon at 110.0deg phase=0.08 elev=-46.0 )
AL_20110830_002720337_000002_14724301    30 stars filter C [ 2583.7s -  2763.7s] expo=180s elev= 6.5deg humid= 30% sunelev=-35.7deg (moon at 110.0deg phase=0.08 elev=-46.0 )
AL_20110830_003031057_000002_14724301    23 stars filter R [ 2774.4s -  2954.4s] expo=180s elev= 6.0deg humid= 29% sunelev=-35.5deg (moon at 110.0deg phase=0.08 elev=-46.0 )
AL_20110830_003342025_000002_14724301    22 stars filter C [ 2965.4s -  3145.4s] expo=180s elev= 5.5deg humid= 29% sunelev=-35.3deg (moon at 110.0deg phase=0.08 elev=-46.0 )
AL_20110830_003653030_000002_14724301    22 stars filter C [ 3156.4s -  3336.4s] expo=180s elev= 4.9deg humid= 29% sunelev=-35.1deg (moon at 110.0deg phase=0.08 elev=-46.0 )
AL_20110830_004003264_000002_14724301    15 stars filter R [ 3346.6s -  3526.6s] expo=180s elev= 4.4deg humid= 29% sunelev=-34.9deg (moon at 110.0deg phase=0.08 elev=-46.0 )
AL_20110830_004414342_000002_14724401    15 stars filter C [ 3597.7s -  3777.7s] expo=180s elev= 3.7deg humid= 30% sunelev=-34.7deg (moon at 110.0deg phase=0.08 elev=-46.0 )
AL_20110830_004725331_000002_14724401    13 stars filter C [ 3788.6s -  3968.6s] expo=180s elev= 3.2deg humid= 30% sunelev=-34.5deg (moon at 110.0deg phase=0.08 elev=-46.0 )
AL_20110830_005036316_000002_14724401     6 stars filter R [ 3979.6s -  4159.6s] expo=180s elev= 2.6deg humid= 29% sunelev=-34.3deg (moon at 110.0deg phase=0.08 elev=-46.0 )
AL_20110830_005347238_000002_14724401     0 star  filter C [ 4170.6s -  4350.6s] expo=180s elev= 2.1deg humid= 29% sunelev=-34.0deg (moon at 110.0deg phase=0.08 elev=-46.0 )
AL_20110830_005657507_000002_14724401     0 star  filter C [ 4360.9s -  4540.9s] expo=180s elev= 1.6deg humid= 30% sunelev=-33.8deg (moon at 110.0deg phase=0.08 elev=-46.0 )
AL_20110830_010008274_000002_14724401     0 star  filter R [ 4551.6s -  4731.6s] expo=180s elev= 1.1deg humid= 28% sunelev=-33.6deg (moon at 110.0deg phase=0.08 elev=-45.0 )
AL_20110830_010725170_000002_14724501     0 star  filter C [ 4988.5s -  5168.5s] expo=180s elev=-0.0deg humid= 28% sunelev=-33.0deg (moon at 110.0deg phase=0.08 elev=-45.0 )
AL_20110830_011035451_000002_14724501     0 star  filter R [ 5178.8s -  5358.8s] expo=180s elev=-1.2deg humid= 28% sunelev=-32.7deg (moon at 110.0deg phase=0.08 elev=-45.0 )
AL_20110830_011346436_000002_14724501     0 star  filter C [ 5369.8s -  5549.8s] expo=180s elev=-1.7deg humid= 29% sunelev=-32.4deg (moon at 110.0deg phase=0.08 elev=-45.0 )
AL_20110830_011657393_000002_14724501     1 star  filter C [ 5560.8s -  5740.8s] expo=180s elev=-2.3deg humid= 30% sunelev=-32.1deg (moon at 110.0deg phase=0.08 elev=-44.0 )
AL_20110830_012007659_000002_14724501     0 star  filter R [ 5751.0s -  5931.0s] expo=180s elev=-2.9deg humid= 29% sunelev=-31.8deg (moon at 110.0deg phase=0.08 elev=-44.0 )
Informations from GCN notice:
This is a GRB
Date of GRB : 2455803.4869449073 2011-08-29T23:41:12.039
Date of notice : 2455803.4898379631 2011-08-29T23:45:22.000
Refined position : no
RA(J2000.0) : 278.721000 18h34m53s0
DEC(J2000.0) : -8.751000 -08d45m03s59
Error box : x=8:118 y=9:119 (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=23.263694 lat=-0.336924
NASA/IPAC-Extragalactic-Database tool for calculate an extinction

Extinction from Schlegel et al. (1998, ApJ 500, 525): E(B-V)=1.503
Assuming Rv=3.1: Av=4.983 Ar=4.018 Ai=2.916
extmap.fit: Extinction map E(B-V) from Schlegel:

Field of View is about 55 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 110829: 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 110829 detected by SWIFT
(trigger 501752) with the TAROT robotic telescope (D=25cm)
located at the Calern observatory, France.

The observations started 264.4s after the GRB trigger
(14.0s after the notice). The elevation of the field decreased from
13 degrees above horizon and weather conditions
were XXX.

---- NO
The date of trigger : t0 = 2011-08-29T23:41:11.616

The first image is trailed with a duration of 30.0s
(see the description in Klotz et al., 2006, A&A 451, L39).
We do not detect any OT with a limiting magnitude of:
t0+264.4s to t0+294.4s : R > 15.1

The second image is 30.0s exposure in tracking mode:
t0+305.4s to t0+335.4s : R > 16.2

We co-added a series of exposures:
t0+305.4s to t0+1594.5s : 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 264.4s 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= 23.2637 lat= -0.3369
and the galactic extinction in R band is 4.0 magnitudes
estimated from D. Schlegel et al. 1998ApJ...500..525S.

This message may be cited.
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