GRBAGILE1_20170227_G275404 at TAROT Calern observatory

TAROT Calern observatory log of images

IM_20170227_021006531_000000_50829101    31 stars filter C [212354921281.3s - 212354921401.3s] expo=120s elev= 7.1deg humid= 86% sunelev=-42.8deg (moon at  61.0deg phase=0.03 elev=-45.0 )
IM_20170227_021217584_000000_50829101    42 stars filter C [212354921412.3s - 212354921532.3s] expo=120s elev= 7.5deg humid= 86% sunelev=-42.5deg (moon at  61.0deg phase=0.03 elev=-45.0 )
IM_20170227_023606143_000000_50829201    79 stars filter C [212354922841.0s - 212354922961.0s] expo=120s elev=11.7deg humid= 87% sunelev=-38.9deg (moon at  61.0deg phase=0.04 elev=-42.0 )
IM_20170227_023816861_000000_50829201    76 stars filter C [212354922971.7s - 212354923091.7s] expo=120s elev=12.1deg humid= 88% sunelev=-38.6deg (moon at  61.0deg phase=0.04 elev=-41.0 )
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=45.3660038274 lat=1.19433030346
NASA/IPAC-Extragalactic-Database tool for calculate an extinction

Extinction from Schlegel et al. (1998, ApJ 500, 525): E(B-V)=2.670
Assuming Rv=3.1: Av=8.850 Ar=7.136 Ai=5.179 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
ROTSE last GRB images

Example of a GCNC email for this burst
GRB AGILE1: TAROT Calern observatory optical observations
Klotz A., Turpin D., Atteia J.L. (CNRS-OMP-IRAP),
Boer, M., Laugier, R. (CNRS-ARTEMIS),
Gendre B. (UVI - Etelman Obs.) report:

We imaged the field of GRB AGILE1 detected by XXX
(trigger XXX) with the TAROT robotic telescope (D=25cm)
located at the Calern observatory, France.

The observations started 212354921281.3s after the GRB trigger
(XXXs after the notice). The elevation of the field increased from
7 degrees above horizon and weather conditions
were XXX.

---- NO
The date of trigger : t0 = 1858-11-17T00:00:00.000

The first image is trailed with a duration of 120.0s
(see the description in Klotz et al., 2006, A&A 451, L39).
We do not detect any OT with a limiting magnitude of:
t0+212354921281.3s to t0+212354921401.3s : R > 15.1

The second image is 120.0s exposure in tracking mode:
t0+212354921412.3s to t0+212354921532.3s : R > 16.2

We co-added a series of exposures:
t0+212354921412.3s to t0+212354923091.7s : R > 17.7
---- YES
We detect a new fading source in the error box given by XXX
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 212354921281.3s 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= 45.3660 lat= +1.1943
and the galactic extinction in R band is 7.1 magnitudes
estimated from D. Schlegel et al. 1998ApJ...500..525S.

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