GRB180329_005801_SWIFT at TAROT Calern observatory

TAROT Calern observatory log of images

AL_20180329_044109642_000001_15239901     0 star  filter C [13203.5s - 13383.5s] expo=180s elev= 6.0deg humid= 66% sunelev=-8.2deg (moon at 168.0deg phase=0.83 elev= -2.0 )
AL_20180329_044419877_000001_15239901     0 star  filter C [13393.7s - 13573.7s] expo=180s elev= 6.5deg humid= 65% sunelev=-7.6deg (moon at 168.0deg phase=0.83 elev= -3.0 )
AL_20180329_044730455_000001_15239901     0 star  filter C [13584.3s - 13764.3s] expo=180s elev= 7.0deg humid= 65% sunelev=-7.0deg (moon at 168.0deg phase=0.83 elev= -3.0 )
Informations from GCN notice:
This is a GRB
Date of the alert : 2458206.54028704 2018-03-29T00:58:00.800
Decoded useful notice informations.
RA(J2000.0) : 329.2979 21h57m11s4
DEC(J2000.0) : -15.0707 -15d04m14s51
Error radius : 3.0 arcmin

Other pages about TAROT Calern observatory observations

Sum of images.
Differential photometry.

Galactic coordinates

Galactic coordinates : lon=40.4357561657 lat=-47.8419398293
NASA/IPAC-Extragalactic-Database tool for calculate an extinction

Extinction from Schlegel et al. (1998, ApJ 500, 525): E(B-V)=0.044
Assuming Rv=3.1: Av=0.146 Ar=0.118 Ai=0.085
extmap.fit: Extinction map E(B-V) from Schlegel:

Field of View is about 108 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 180329: TAROT Calern observatory optical observations
----------------------------------------------------------------------
Klotz A., Noysena.K., Atteia J.L. (CNRS-OMP-IRAP),
Boer, M., Eymar, L. (CNRS-ARTEMIS),
Gendre B. (UVI - Etelman Obs.) report:

We imaged the field of GRB 180329 detected by SWIFT
(trigger 819301) with the TAROT robotic telescope (D=25cm)
located at the Calern observatory, France.

The observations started 3.67h after the GRB trigger.
The elevation of the field increased from
6 degrees above horizon and weather conditions
were XXX.

---- NO
The date of trigger : t0 = 2018-03-29T00:58:00.800

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+13203.5s to t0+13383.5s : R > 15.1

The second image is 180.0s exposure in tracking mode:
t0+13393.7s to t0+13573.7s : R > 16.2

We co-added a series of exposures:
t0+13393.7s to t0+13764.3s : 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 3.67h 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= 40.4358 lat=-47.8419
and the galactic extinction in R band is 0.1 magnitudes
estimated from D. Schlegel et al. 1998ApJ...500..525S.

This message may be cited.
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