GRB110625_000652_SWIFT at TAROT Calern observatory

TAROT Calern observatory log of images

AL_20110625_000855124_110625_00060   125 stars filter C [  133.0s -   163.0s] expo= 30s elev=45.3deg humid= 83% sunelev=-22.4deg (moon at  94.0deg phase=0.41 elev= +4.0 )
AL_20110625_000935172_110625_00060   136 stars filter C [  173.1s -   203.1s] expo= 30s elev=45.3deg humid= 83% sunelev=-22.3deg (moon at  94.0deg phase=0.41 elev= +4.0 )
AL_20110625_001015437_110625_00060   126 stars filter C [  213.3s -   243.3s] expo= 30s elev=45.3deg humid= 83% sunelev=-22.3deg (moon at  94.0deg phase=0.41 elev= +4.0 )
AL_20110625_001055249_110625_00060   126 stars filter C [  253.1s -   283.1s] expo= 30s elev=45.3deg humid= 83% sunelev=-22.3deg (moon at  94.0deg phase=0.41 elev= +4.0 )
AL_20110625_001135297_110625_00060   131 stars filter C [  293.2s -   323.2s] expo= 30s elev=45.3deg humid= 83% sunelev=-22.3deg (moon at  94.0deg phase=0.41 elev= +4.0 )
AL_20110625_001848162_000002_01033901   166 stars filter C [  666.1s -   756.1s] expo= 90s elev=45.3deg humid= 84% sunelev=-22.1deg (moon at  94.0deg phase=0.41 elev= +6.0 )
AL_20110625_002027973_000002_01033901   170 stars filter C [  765.9s -   855.9s] expo= 90s elev=45.3deg humid= 84% sunelev=-22.0deg (moon at  94.0deg phase=0.41 elev= +6.0 )
AL_20110625_002208708_000002_01033901   115 stars filter R [  866.6s -   956.6s] expo= 90s elev=45.3deg humid= 84% sunelev=-22.0deg (moon at  94.0deg phase=0.41 elev= +6.0 )
AL_20110625_002348761_000002_01033901   174 stars filter C [  966.6s -  1056.6s] expo= 90s elev=45.2deg humid= 84% sunelev=-21.9deg (moon at  94.0deg phase=0.41 elev= +7.0 )
AL_20110625_002529261_000002_01033901   180 stars filter C [ 1067.1s -  1157.1s] expo= 90s elev=45.2deg humid= 84% sunelev=-21.8deg (moon at  94.0deg phase=0.41 elev= +7.0 )
AL_20110625_002709075_000002_01033901   135 stars filter R [ 1167.0s -  1257.0s] expo= 90s elev=45.2deg humid= 85% sunelev=-21.8deg (moon at  94.0deg phase=0.41 elev= +7.0 )
AL_20110625_002949433_000002_01034001   153 stars filter C [ 1327.3s -  1417.3s] expo= 90s elev=45.1deg humid= 86% sunelev=-21.7deg (moon at  94.0deg phase=0.41 elev= +8.0 )
AL_20110625_003130402_000002_01034001   165 stars filter C [ 1428.3s -  1518.3s] expo= 90s elev=45.1deg humid= 87% sunelev=-21.6deg (moon at  94.0deg phase=0.41 elev= +8.0 )
AL_20110625_003310220_000002_01034001   131 stars filter R [ 1528.1s -  1618.1s] expo= 90s elev=45.1deg humid= 88% sunelev=-21.5deg (moon at  94.0deg phase=0.41 elev= +8.0 )
AL_20110625_003450033_000002_01034001   171 stars filter C [ 1627.9s -  1717.9s] expo= 90s elev=45.0deg humid= 89% sunelev=-21.4deg (moon at  94.0deg phase=0.41 elev= +8.0 )
AL_20110625_003630768_000002_01034001   166 stars filter C [ 1728.7s -  1818.7s] expo= 90s elev=45.0deg humid= 89% sunelev=-21.4deg (moon at  94.0deg phase=0.41 elev= +9.0 )
AL_20110625_003810580_000002_01034001   116 stars filter R [ 1828.5s -  1918.5s] expo= 90s elev=44.9deg humid= 89% sunelev=-21.3deg (moon at  94.0deg phase=0.40 elev= +9.0 )
AL_20110625_022520916_000002_01034601   162 stars filter C [ 8168.8s -  8348.8s] expo=180s elev=36.5deg humid= 84% sunelev=-12.4deg (moon at  95.0deg phase=0.40 elev=+28.0 )
AL_20110625_022831415_000002_01034601   146 stars filter C [ 8359.3s -  8539.3s] expo=180s elev=36.1deg humid= 84% sunelev=-12.1deg (moon at  95.0deg phase=0.40 elev=+28.0 )
AL_20110625_023142149_000002_01034601    96 stars filter R [ 8550.0s -  8730.0s] expo=180s elev=35.7deg humid= 83% sunelev=-11.7deg (moon at  95.0deg phase=0.40 elev=+29.0 )
AL_20110625_023452436_000002_01034601   137 stars filter C [ 8740.3s -  8920.3s] expo=180s elev=35.3deg humid= 83% sunelev=-11.3deg (moon at  95.0deg phase=0.40 elev=+30.0 )
AL_20110625_023802937_000002_01034601   101 stars filter C [ 8930.8s -  9110.8s] expo=180s elev=34.8deg humid= 83% sunelev=-11.0deg (moon at  95.0deg phase=0.40 elev=+30.0 )
AL_20110625_024113437_000002_01034601    89 stars filter R [ 9121.3s -  9301.3s] expo=180s elev=34.4deg humid= 83% sunelev=-10.6deg (moon at  95.0deg phase=0.40 elev=+31.0 )
Informations from GCN notice:
This is a GRB
Date of GRB : 2455737.5042548613 2011-06-25T00:06:07.620
Date of notice : 2455737.5047569443 2011-06-25T00:06:50.999
Refined position : yes (error radius=2.2 arcsec)
RA(J2000.0) : 282.513600 18h50m03s2
DEC(J2000.0) : -0.939500 -00d56m22s20
Error box : x=104:105 y=95:96 (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=31.929667 lat=-0.166914
NASA/IPAC-Extragalactic-Database tool for calculate an extinction

Extinction from Schlegel et al. (1998, ApJ 500, 525): E(B-V)=3.452
Assuming Rv=3.1: Av=11.444 Ar=9.228 Ai=6.697
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 110625: 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 110625 detected by SWIFT
(trigger 456014) with the TAROT robotic telescope (D=25cm)
located at the Calern observatory, France.

The observations started 133.0s after the GRB trigger
(89.2s after the notice). The elevation of the field increased from
45 degrees above horizon and weather conditions
were XXX.

---- NO
The date of trigger : t0 = 2011-06-25T00:06:07.200

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+133.0s to t0+163.0s : R > 15.1

The second image is 30.0s exposure in tracking mode:
t0+173.1s to t0+203.1s : R > 16.2

We co-added a series of exposures:
t0+173.1s to t0+855.9s : 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 133.0s 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= 31.9297 lat= -0.1669
and the galactic extinction in R band is 9.2 magnitudes
estimated from D. Schlegel et al. 1998ApJ...500..525S.

This message may be cited.
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