GRB15_20170314_G277583 at TAROT Calern observatory

TAROT Calern observatory log of images

IM_20170314_210615034_000000_52959601    51 stars filter C [212356285449.9s - 212356285569.9s] expo=120s elev=57.5deg humid= 70% sunelev=-36.0deg (moon at 102.0deg phase=0.85 elev=+13.0 )
IM_20170314_210825815_000000_52959601    59 stars filter C [212356285580.6s - 212356285700.6s] expo=120s elev=57.1deg humid= 70% sunelev=-36.3deg (moon at 103.0deg phase=0.85 elev=+14.0 )
IM_20170314_231155239_000000_52959701    47 stars filter C [212356292990.0s - 212356293110.0s] expo=120s elev=34.9deg humid= 74% sunelev=-48.0deg (moon at 103.0deg phase=0.84 elev=+31.0 )
IM_20170314_231406192_000000_52959701    52 stars filter C [212356293121.0s - 212356293241.0s] expo=120s elev=34.5deg humid= 75% sunelev=-48.0deg (moon at 103.0deg phase=0.84 elev=+32.0 )
IM_20170315_210615258_000000_52968301    64 stars filter C [212356371850.1s - 212356371970.1s] expo=120s elev=56.8deg humid= 70% sunelev=-35.7deg (moon at 115.0deg phase=0.79 elev= +3.0 )
IM_20170315_210826036_000000_52968301    64 stars filter C [212356371980.8s - 212356372100.8s] expo=120s elev=56.4deg humid= 71% sunelev=-36.0deg (moon at 115.0deg phase=0.79 elev= +4.0 )
IM_20170315_231155264_000000_52968401    62 stars filter C [212356379390.0s - 212356379510.0s] expo=120s elev=34.2deg humid= 69% sunelev=-47.6deg (moon at 115.0deg phase=0.78 elev=+23.0 )
IM_20170315_231406030_000000_52968401    63 stars filter C [212356379520.8s - 212356379640.8s] expo=120s elev=33.8deg humid= 69% sunelev=-47.6deg (moon at 115.0deg phase=0.78 elev=+23.0 )
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=184.990840744 lat=9.75484235572
NASA/IPAC-Extragalactic-Database tool for calculate an extinction

Extinction from Schlegel et al. (1998, ApJ 500, 525): E(B-V)=0.216
Assuming Rv=3.1: Av=0.716 Ar=0.577 Ai=0.419 Extinction map E(B-V) from Schlegel:

Field of View is about 60 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 15_201: 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 15_201 detected by XXX
(trigger XXX) with the TAROT robotic telescope (D=25cm)
located at the Calern observatory, France.

The observations started 212356285449.9s after the GRB trigger
(XXXs after the notice). The elevation of the field decreased from
57 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+212356285449.9s to t0+212356285569.9s : R > 15.1

The second image is 120.0s exposure in tracking mode:
t0+212356285580.6s to t0+212356285700.6s : R > 16.2

We co-added a series of exposures:
t0+212356285580.6s to t0+212356379510.0s : 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 212356285449.9s 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=184.9908 lat= +9.7548
and the galactic extinction in R band is 0.6 magnitudes
estimated from D. Schlegel et al. 1998ApJ...500..525S.

This message may be cited.