GRBAGILE3_20170227_G275404 at TAROT Calern observatory

TAROT Calern observatory log of images

IM_20170227_022006506_000000_50830801    26 stars filter C [212354921881.3s - 212354922001.3s] expo=120s elev= 6.4deg humid= 87% sunelev=-41.3deg (moon at  59.0deg phase=0.04 elev=-44.0 )
IM_20170227_022217904_000000_50830801    39 stars filter C [212354922012.7s - 212354922132.7s] expo=120s elev= 6.8deg humid= 87% sunelev=-41.0deg (moon at  59.0deg phase=0.04 elev=-43.0 )
IM_20170227_024606129_000000_50830901    45 stars filter C [212354923441.0s - 212354923561.0s] expo=120s elev=11.1deg humid= 88% sunelev=-37.3deg (moon at  59.0deg phase=0.04 elev=-40.0 )
IM_20170227_024817145_000000_50830901    39 stars filter C [212354923572.0s - 212354923692.0s] expo=120s elev=11.5deg humid= 88% sunelev=-37.0deg (moon at  59.0deg phase=0.04 elev=-40.0 )
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=44.6020827378 lat=-1.16557467638
NASA/IPAC-Extragalactic-Database tool for calculate an extinction

Extinction from Schlegel et al. (1998, ApJ 500, 525): E(B-V)=1.384
Assuming Rv=3.1: Av=4.589 Ar=3.700 Ai=2.685 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 AGILE3: 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 AGILE3 detected by XXX
(trigger XXX) with the TAROT robotic telescope (D=25cm)
located at the Calern observatory, France.

The observations started 212354921881.3s after the GRB trigger
(XXXs after the notice). The elevation of the field increased from
6 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+212354921881.3s to t0+212354922001.3s : R > 15.1

The second image is 120.0s exposure in tracking mode:
t0+212354922012.7s to t0+212354922132.7s : R > 16.2

We co-added a series of exposures:
t0+212354922012.7s to t0+212354923692.0s : 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 212354921881.3s 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= 44.6021 lat= -1.1656
and the galactic extinction in R band is 3.7 magnitudes
estimated from D. Schlegel et al. 1998ApJ...500..525S.

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