GRB150625_005444_INTEGRAL at TAROT Calern observatory

TAROT Calern observatory log of images

AL_20150625_005618826_000000_00000001     0 star  filter C [   29.6s -    89.6s] expo= 60s elev=76.2deg humid= 50% sunelev=-20.3deg (moon at 115.0deg phase=0.53 elev=-14.0 )
AL_20150625_005822504_000000_00000001    67 stars filter C [  183.2s -   213.2s] expo= 30s elev=76.6deg humid= 49% sunelev=-20.1deg (moon at 115.0deg phase=0.53 elev=-14.0 )
AL_20150625_005908394_000000_00000001    70 stars filter C [  229.0s -   259.0s] expo= 30s elev=76.7deg humid= 50% sunelev=-20.1deg (moon at 115.0deg phase=0.53 elev=-14.0 )
AL_20150625_005949785_000000_00000001    63 stars filter C [  270.5s -   300.5s] expo= 30s elev=76.7deg humid= 50% sunelev=-20.0deg (moon at 115.0deg phase=0.53 elev=-14.0 )
AL_20150625_010033629_000000_00000001    69 stars filter C [  314.5s -   344.5s] expo= 30s elev=76.8deg humid= 50% sunelev=-20.0deg (moon at 115.0deg phase=0.53 elev=-14.0 )
AL_20150625_010114613_000000_00000001    70 stars filter C [  355.4s -   385.4s] expo= 30s elev=76.9deg humid= 50% sunelev=-20.0deg (moon at 115.0deg phase=0.53 elev=-14.0 )
AL_20150625_010256301_000000_00000001    86 stars filter C [  397.1s -   487.1s] expo= 90s elev=77.1deg humid= 50% sunelev=-19.9deg (moon at 115.0deg phase=0.53 elev=-15.0 )
AL_20150625_010443535_000000_00000001    90 stars filter C [  504.4s -   594.4s] expo= 90s elev=77.3deg humid= 50% sunelev=-19.8deg (moon at 115.0deg phase=0.53 elev=-15.0 )
AL_20150625_010626613_000000_00000001    73 stars filter R [  607.4s -   697.4s] expo= 90s elev=77.5deg humid= 50% sunelev=-19.7deg (moon at 115.0deg phase=0.53 elev=-15.0 )
AL_20150625_010808019_000000_00000001    88 stars filter C [  708.9s -   798.9s] expo= 90s elev=77.7deg humid= 50% sunelev=-19.6deg (moon at 115.0deg phase=0.53 elev=-16.0 )
AL_20150625_010951073_000000_00000001    92 stars filter C [  812.0s -   902.0s] expo= 90s elev=77.9deg humid= 51% sunelev=-19.4deg (moon at 115.0deg phase=0.53 elev=-16.0 )
AL_20150625_011133026_000000_00000001    66 stars filter R [  913.9s -  1003.9s] expo= 90s elev=78.1deg humid= 51% sunelev=-19.3deg (moon at 115.0deg phase=0.53 elev=-16.0 )
AL_20150625_011315198_000000_00000001    89 stars filter C [ 1016.0s -  1106.0s] expo= 90s elev=78.3deg humid= 52% sunelev=-19.2deg (moon at 115.0deg phase=0.53 elev=-16.0 )
AL_20150625_011456214_000000_00000001    94 stars filter C [ 1117.0s -  1207.0s] expo= 90s elev=78.5deg humid= 52% sunelev=-19.1deg (moon at 115.0deg phase=0.53 elev=-17.0 )
AL_20150625_011637136_000000_00000001    75 stars filter R [ 1218.0s -  1308.0s] expo= 90s elev=78.6deg humid= 52% sunelev=-18.9deg (moon at 115.0deg phase=0.53 elev=-17.0 )
AL_20150625_011817886_000000_00000001    89 stars filter C [ 1318.7s -  1408.7s] expo= 90s elev=78.8deg humid= 53% sunelev=-18.8deg (moon at 115.0deg phase=0.53 elev=-17.0 )
AL_20150625_011958888_000000_00000001    91 stars filter C [ 1419.7s -  1509.7s] expo= 90s elev=78.9deg humid= 53% sunelev=-18.7deg (moon at 115.0deg phase=0.53 elev=-18.0 )
AL_20150625_012139888_000000_00000001    76 stars filter R [ 1520.7s -  1610.7s] expo= 90s elev=79.1deg humid= 54% sunelev=-18.6deg (moon at 115.0deg phase=0.53 elev=-18.0 )
AL_20150625_012321044_000000_00000001    90 stars filter C [ 1621.9s -  1711.9s] expo= 90s elev=79.2deg humid= 54% sunelev=-18.4deg (moon at 115.0deg phase=0.53 elev=-18.0 )
AL_20150625_012632231_000000_00000001    99 stars filter C [ 1723.1s -  1903.1s] expo=180s elev=79.4deg humid= 54% sunelev=-18.3deg (moon at 115.0deg phase=0.53 elev=-19.0 )
AL_20150625_012943014_000000_00000001    99 stars filter C [ 1913.9s -  2093.9s] expo=180s elev=79.6deg humid= 52% sunelev=-18.0deg (moon at 115.0deg phase=0.53 elev=-19.0 )
AL_20150625_013254280_000000_00000001    79 stars filter R [ 2105.1s -  2285.1s] expo=180s elev=79.8deg humid= 52% sunelev=-17.8deg (moon at 115.0deg phase=0.53 elev=-20.0 )
AL_20150625_013604764_000000_00000001   103 stars filter C [ 2295.6s -  2475.6s] expo=180s elev=80.0deg humid= 52% sunelev=-17.5deg (moon at 115.0deg phase=0.53 elev=-20.0 )
AL_20150625_013915497_000000_00000001   100 stars filter C [ 2486.3s -  2666.3s] expo=180s elev=80.1deg humid= 53% sunelev=-17.2deg (moon at 115.0deg phase=0.54 elev=-21.0 )
AL_20150625_014226216_000000_00000001    72 stars filter R [ 2677.1s -  2857.1s] expo=180s elev=80.1deg humid= 53% sunelev=-16.9deg (moon at 115.0deg phase=0.54 elev=-21.0 )
AL_20150625_014537919_000000_00000001    91 stars filter C [ 2868.8s -  3048.8s] expo=180s elev=80.2deg humid= 53% sunelev=-16.6deg (moon at 115.0deg phase=0.54 elev=-22.0 )
AL_20150625_014849138_000000_00000001   105 stars filter C [ 3060.0s -  3240.0s] expo=180s elev=80.2deg humid= 53% sunelev=-16.4deg (moon at 114.0deg phase=0.54 elev=-22.0 )
AL_20150625_015159618_000000_00000001    88 stars filter R [ 3250.5s -  3430.5s] expo=180s elev=80.1deg humid= 54% sunelev=-16.0deg (moon at 114.0deg phase=0.54 elev=-23.0 )
AL_20150625_015509899_000000_00000001    97 stars filter C [ 3440.8s -  3620.8s] expo=180s elev=80.1deg humid= 55% sunelev=-15.7deg (moon at 114.0deg phase=0.54 elev=-23.0 )
AL_20150625_015820634_000000_00000001    99 stars filter C [ 3631.5s -  3811.5s] expo=180s elev=79.9deg humid= 55% sunelev=-15.4deg (moon at 114.0deg phase=0.54 elev=-24.0 )
AL_20150625_020130936_000000_00000001    80 stars filter R [ 3821.8s -  4001.8s] expo=180s elev=79.8deg humid= 56% sunelev=-15.1deg (moon at 114.0deg phase=0.54 elev=-25.0 )
AL_20150625_020441686_000000_00000001   104 stars filter C [ 4012.6s -  4192.6s] expo=180s elev=79.6deg humid= 57% sunelev=-14.8deg (moon at 114.0deg phase=0.54 elev=-25.0 )
AL_20150625_020751967_000000_00000001   100 stars filter C [ 4202.8s -  4382.8s] expo=180s elev=79.4deg humid= 58% sunelev=-14.5deg (moon at 114.0deg phase=0.54 elev=-26.0 )
AL_20150625_021102496_000000_00000001    72 stars filter R [ 4393.4s -  4573.4s] expo=180s elev=79.1deg humid= 59% sunelev=-14.1deg (moon at 114.0deg phase=0.54 elev=-26.0 )
AL_20150625_021413261_000000_00000001    97 stars filter C [ 4584.1s -  4764.1s] expo=180s elev=78.8deg humid= 60% sunelev=-13.8deg (moon at 114.0deg phase=0.54 elev=-27.0 )
AL_20150625_022030180_000000_00000001    78 stars filter R [ 4780.9s -  4960.9s] expo=180s elev=78.5deg humid= 60% sunelev=-13.4deg (moon at 114.0deg phase=0.54 elev=-27.0 )
AL_20150625_022340961_000000_00000001    91 stars filter C [ 4971.6s -  5151.6s] expo=180s elev=78.2deg humid= 60% sunelev=-13.1deg (moon at 114.0deg phase=0.54 elev=-28.0 )
AL_20150625_022651774_000000_00000001    77 stars filter C [ 5162.4s -  5342.4s] expo=180s elev=77.8deg humid= 61% sunelev=-12.7deg (moon at 114.0deg phase=0.54 elev=-28.0 )
AL_20150625_023002888_000000_00000001    71 stars filter R [ 5353.8s -  5533.8s] expo=180s elev=77.5deg humid= 63% sunelev=-12.4deg (moon at 114.0deg phase=0.54 elev=-29.0 )
AL_20150625_023313404_000000_00000001    79 stars filter C [ 5544.3s -  5724.3s] expo=180s elev=77.1deg humid= 64% sunelev=-12.0deg (moon at 114.0deg phase=0.54 elev=-29.0 )
AL_20150625_023623779_000000_00000001    72 stars filter C [ 5734.6s -  5914.6s] expo=180s elev=76.7deg humid= 65% sunelev=-11.6deg (moon at 114.0deg phase=0.54 elev=-30.0 )
AL_20150625_023934498_000000_00000001    63 stars filter R [ 5925.4s -  6105.4s] expo=180s elev=76.2deg humid= 65% sunelev=-11.2deg (moon at 114.0deg phase=0.54 elev=-30.0 )
AL_20150625_024245019_000000_00000001    59 stars filter C [ 6115.9s -  6295.9s] expo=180s elev=75.8deg humid= 65% sunelev=-10.9deg (moon at 114.0deg phase=0.54 elev=-31.0 )
AL_20150625_024555472_000000_00000001    52 stars filter C [ 6306.4s -  6486.4s] expo=180s elev=75.3deg humid= 64% sunelev=-10.5deg (moon at 114.0deg phase=0.54 elev=-31.0 )
AL_20150625_024905816_000000_00000001    42 stars filter R [ 6496.7s -  6676.7s] expo=180s elev=74.9deg humid= 64% sunelev=-10.1deg (moon at 114.0deg phase=0.54 elev=-32.0 )
AL_20150625_025217482_000000_00000001     0 star  filter C [ 6688.4s -  6868.4s] expo=180s elev=74.4deg humid= 64% sunelev=-9.7deg (moon at 114.0deg phase=0.54 elev=-32.0 )
AL_20150625_025527716_000000_00000001     0 star  filter C [ 6878.7s -  7058.7s] expo=180s elev=73.9deg humid= 65% sunelev=-9.3deg (moon at 114.0deg phase=0.54 elev=-33.0 )
AL_20150625_025839435_000000_00000001    20 stars filter R [ 7070.3s -  7250.3s] expo=180s elev=73.4deg humid= 64% sunelev=-8.9deg (moon at 114.0deg phase=0.54 elev=-33.0 )
Informations from GCN notice:
This is a GRB
Date of the alert : 2457198.53801 2015-06-25T00:54:44.064
Decoded useful notice informations.
RA(J2000.0) : 305.987192734 20h23m56s9
DEC(J2000.0) : 33.8791714027 +33d52m45s01
Error radius : 3.2 arcmin

Other pages about TAROT Calern observatory observations

Sum of images.
Differential photometry.

Galactic coordinates

Galactic coordinates : lon=73.1147965692 lat=-2.06490631422
NASA/IPAC-Extragalactic-Database tool for calculate an extinction

Extinction from Schlegel et al. (1998, ApJ 500, 525): E(B-V)=0.521
Assuming Rv=3.1: Av=1.727 Ar=1.392 Ai=1.010
extmap.fit: 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
GRBlog
ROTSE last GRB images

Example of a GCNC email for this burst

gcncirc@capella.gsfc.nasa.gov
GRB 150625: 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 150625 detected by INTEGRAL
(trigger 7132) with the TAROT robotic telescope (D=25cm)
located at the Calern observatory, France.

The observations started 29.6s after the GRB trigger
(24.4s after the notice). The elevation of the field increased from
76 degrees above horizon and weather conditions
were XXX.

---- NO
The date of trigger : t0 = 2015-06-25T00:54:44.064

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+29.6s to t0+89.6s : R > 15.1

The second image is 30.0s exposure in tracking mode:
t0+183.2s to t0+213.2s : R > 16.2

We co-added a series of exposures:
t0+183.2s to t0+487.1s : 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 29.6s 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= 73.1148 lat= -2.0649
and the galactic extinction in R band is 1.4 magnitudes
estimated from D. Schlegel et al. 1998ApJ...500..525S.

This message may be cited.
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