GRB110422_154212_SWIFT at TAROT Calern observatory

TAROT Calern observatory log of images

AL_20110423_000128079_000001_87028001     0 star  filter C [29786.7s - 29966.7s] expo=180s elev=38.3deg humid= 82% sunelev=-33.6deg (moon at 127.0deg phase=0.64 elev= +3.0 )
AL_20110423_000437891_000001_87028001     0 star  filter R [29976.3s - 30156.3s] expo=180s elev=38.1deg humid= 81% sunelev=-33.5deg (moon at 127.0deg phase=0.64 elev= +3.0 )
AL_20110423_000748398_000001_87028001     0 star  filter V [30166.9s - 30346.9s] expo=180s elev=37.9deg humid= 82% sunelev=-33.4deg (moon at 127.0deg phase=0.64 elev= +4.0 )
AL_20110423_002627733_000001_87028101     0 star  filter C [31286.2s - 31466.2s] expo=180s elev=36.9deg humid= 82% sunelev=-32.6deg (moon at 127.0deg phase=0.63 elev= +6.0 )
AL_20110423_002937554_000001_87028101     0 star  filter R [31476.0s - 31656.0s] expo=180s elev=36.7deg humid= 82% sunelev=-32.4deg (moon at 127.0deg phase=0.63 elev= +7.0 )
AL_20110423_003248288_000001_87028101     0 star  filter V [31666.8s - 31846.8s] expo=180s elev=36.6deg humid= 82% sunelev=-32.3deg (moon at 127.0deg phase=0.63 elev= +7.0 )
No informations from GCN notice.

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=139.714402 lat=28.488585
NASA/IPAC-Extragalactic-Database tool for calculate an extinction

Extinction from Schlegel et al. (1998, ApJ 500, 525): E(B-V)=0.028
Assuming Rv=3.1: Av=0.093 Ar=0.075 Ai=0.055 Extinction map E(B-V) from Schlegel:

Field of View is about 76 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 110422: 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 110422 detected by SWIFT
(trigger 451901) with the TAROT robotic telescope (D=25cm)
located at the Calern observatory, France.

The observations started 29786.7s after the GRB trigger
(XXXs after the notice). The elevation of the field decreased from
38 degrees above horizon and weather conditions
were XXX.

---- NO
The date of trigger : t0 = 2011-04-22T15:41:55.968

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+29786.7s to t0+29966.7s : R > 15.1

The second image is 180.0s exposure in tracking mode:
t0+29976.3s to t0+30156.3s : R > 16.2

We co-added a series of exposures:
t0+29976.3s to t0+31846.8s : 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 29786.7s 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=139.7144 lat=+28.4886
and the galactic extinction in R band is 0.1 magnitudes
estimated from D. Schlegel et al. 1998ApJ...500..525S.

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