GRB150619_001729_INTEGRAL at TAROT Calern observatory

TAROT Calern observatory log of images

AL_20150619_001851751_000000_00000001     0 star  filter C [   17.8s -    77.8s] expo= 60s elev=66.4deg humid= 77% sunelev=-22.0deg (moon at 130.0deg phase=0.17 elev=-28.0 )
AL_20150619_001936954_000000_00000001    91 stars filter C [   92.9s -   122.9s] expo= 30s elev=66.6deg humid= 77% sunelev=-22.0deg (moon at 130.0deg phase=0.17 elev=-28.0 )
AL_20150619_002018610_000000_00000001    94 stars filter C [  134.6s -   164.6s] expo= 30s elev=66.7deg humid= 77% sunelev=-22.0deg (moon at 130.0deg phase=0.17 elev=-28.0 )
AL_20150619_002100298_000000_00000001    91 stars filter C [  176.3s -   206.3s] expo= 30s elev=66.8deg humid= 77% sunelev=-21.9deg (moon at 130.0deg phase=0.17 elev=-28.0 )
AL_20150619_002140798_000000_00000001    87 stars filter C [  216.8s -   246.8s] expo= 30s elev=66.9deg humid= 76% sunelev=-21.9deg (moon at 130.0deg phase=0.17 elev=-28.0 )
AL_20150619_002221595_000000_00000001    92 stars filter C [  257.5s -   287.5s] expo= 30s elev=67.1deg humid= 76% sunelev=-21.9deg (moon at 130.0deg phase=0.17 elev=-28.0 )
AL_20150619_002402032_000000_00000001   115 stars filter C [  298.1s -   388.1s] expo= 90s elev=67.3deg humid= 76% sunelev=-21.9deg (moon at 130.0deg phase=0.17 elev=-28.0 )
AL_20150619_002542601_000000_00000001   116 stars filter C [  398.6s -   488.6s] expo= 90s elev=67.5deg humid= 76% sunelev=-21.8deg (moon at 130.0deg phase=0.17 elev=-28.0 )
AL_20150619_002723085_000000_00000001    85 stars filter R [  499.1s -   589.1s] expo= 90s elev=67.8deg humid= 76% sunelev=-21.7deg (moon at 130.0deg phase=0.17 elev=-28.0 )
AL_20150619_002904335_000000_00000001   112 stars filter C [  600.3s -   690.3s] expo= 90s elev=68.1deg humid= 76% sunelev=-21.7deg (moon at 130.0deg phase=0.17 elev=-28.0 )
AL_20150619_003044882_000000_00000001   112 stars filter C [  700.8s -   790.8s] expo= 90s elev=68.4deg humid= 75% sunelev=-21.6deg (moon at 130.0deg phase=0.17 elev=-28.0 )
AL_20150619_003226273_000000_00000001    91 stars filter R [  802.3s -   892.3s] expo= 90s elev=68.7deg humid= 75% sunelev=-21.5deg (moon at 130.0deg phase=0.17 elev=-29.0 )
AL_20150619_003406757_000000_00000001   115 stars filter C [  902.8s -   992.8s] expo= 90s elev=69.0deg humid= 76% sunelev=-21.4deg (moon at 130.0deg phase=0.17 elev=-29.0 )
AL_20150619_003547371_000000_00000001   115 stars filter C [ 1003.3s -  1093.3s] expo= 90s elev=69.3deg humid= 75% sunelev=-21.4deg (moon at 130.0deg phase=0.17 elev=-29.0 )
AL_20150619_003728777_000000_00000001    94 stars filter R [ 1104.8s -  1194.8s] expo= 90s elev=69.6deg humid= 76% sunelev=-21.3deg (moon at 130.0deg phase=0.17 elev=-29.0 )
AL_20150619_003909277_000000_00000001   114 stars filter C [ 1205.3s -  1295.3s] expo= 90s elev=69.8deg humid= 76% sunelev=-21.2deg (moon at 130.0deg phase=0.17 elev=-29.0 )
AL_20150619_004050496_000000_00000001   115 stars filter C [ 1306.5s -  1396.5s] expo= 90s elev=70.1deg humid= 76% sunelev=-21.1deg (moon at 130.0deg phase=0.17 elev=-29.0 )
AL_20150619_004103074_000000_00000001     0 star  filter R [ 1407.0s -  1497.0s] expo= 90s elev=70.4deg humid= 76% sunelev=-21.0deg (moon at 130.0deg phase=0.17 elev=-29.0 )
Informations from GCN notice:
This is a GRB
Date of the alert : 2457192.51214 2015-06-19T00:17:28.896
Decoded useful notice informations.
RA(J2000.0) : 305.99839389 20h23m59s6
DEC(J2000.0) : 33.8487119288 +33d50m55s36
Error radius : 3.3 arcmin

Other pages about TAROT Calern observatory observations

Sum of images.
Differential photometry.

Galactic coordinates

Galactic coordinates : lon=73.0950412539 lat=-2.08987873297
NASA/IPAC-Extragalactic-Database tool for calculate an extinction

Extinction from Schlegel et al. (1998, ApJ 500, 525): E(B-V)=0.494
Assuming Rv=3.1: Av=1.637 Ar=1.320 Ai=0.958 Extinction map E(B-V) from Schlegel:

Field of View is about 56 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 150619: TAROT Calern observatory optical observations
Klotz A., Turpin D. (IRAP-CNRS-OMP),
Boer M., Gendre B., Siellez K., Dereli H., Bardho O. (UNS-CNRS-OCA),
Atteia J.L. (IRAP-CNRS-OMP) report:

We imaged the field of GRB 150619 detected by INTEGRAL
(trigger 7044) with the TAROT robotic telescope (D=25cm)
located at the Calern observatory, France.

The observations started 17.8s after the GRB trigger
(13.5s after the notice). The elevation of the field increased from
66 degrees above horizon and weather conditions
were XXX.

---- NO
The date of trigger : t0 = 2015-06-19T00:17:28.896

The first image is trailed with a duration of 60.0s
(see the description in Klotz et al., 2006, A&A 451, L39).
We do not detect any OT with a limiting magnitude of:
t0+17.8s to t0+77.8s : R > 15.1

The second image is 30.0s exposure in tracking mode:
t0+92.9s to t0+122.9s : R > 16.2

We co-added a series of exposures:
t0+92.9s to t0+388.1s : R > 17.7
---- YES
We detect a new fading source in the error box given by INTEGRAL
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 17.8s 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= 73.0950 lat= -2.0899
and the galactic extinction in R band is 1.3 magnitudes
estimated from D. Schlegel et al. 1998ApJ...500..525S.

This message may be cited.