GRB110208_191745_SWIFT at TAROT Calern observatory

TAROT Calern observatory log of images

AL_20110209_032141249_000001_71810101     0 star  filter C [22187.4s - 22247.4s] expo= 60s elev= 1.0deg humid= 30% sunelev=-36.0deg (moon at 102.0deg phase=0.37 elev=-32.0 )
AL_20110209_032311047_000001_71810101     0 star  filter C [22307.2s - 22337.2s] expo= 30s elev= 1.3deg humid= 31% sunelev=-35.7deg (moon at 102.0deg phase=0.37 elev=-32.0 )
AL_20110209_032441359_000001_71810101     0 star  filter C [22397.5s - 22427.5s] expo= 30s elev= 1.5deg humid= 31% sunelev=-35.4deg (moon at 102.0deg phase=0.37 elev=-32.0 )
AL_20110209_032526484_000001_71810101     0 star  filter C [22442.7s - 22472.7s] expo= 30s elev= 1.7deg humid= 31% sunelev=-35.3deg (moon at 102.0deg phase=0.37 elev=-32.0 )
AL_20110209_033149882_000001_71810201     0 star  filter C [22766.1s - 22856.1s] expo= 90s elev= 2.6deg humid= 32% sunelev=-34.3deg (moon at 102.0deg phase=0.37 elev=-32.0 )
AL_20110209_033335086_000001_71810201     0 star  filter R [22871.2s - 22961.2s] expo= 90s elev= 2.9deg humid= 31% sunelev=-34.0deg (moon at 102.0deg phase=0.37 elev=-32.0 )
AL_20110209_033520195_000001_71810201     0 star  filter C [22976.4s - 23066.4s] expo= 90s elev= 3.2deg humid= 31% sunelev=-33.7deg (moon at 102.0deg phase=0.37 elev=-32.0 )
AL_20110209_033849837_000001_71810201     0 star  filter R [23186.0s - 23276.0s] expo= 90s elev= 3.8deg humid= 31% sunelev=-33.1deg (moon at 102.0deg phase=0.37 elev=-32.0 )
AL_20110209_034108982_000001_71810301     0 star  filter C [23327.8s - 23417.8s] expo= 90s elev= 4.2deg humid= 30% sunelev=-32.7deg (moon at 102.0deg phase=0.37 elev=-32.0 )
AL_20110209_034439294_000001_71810301     0 star  filter R [23538.1s - 23628.1s] expo= 90s elev= 4.9deg humid= 29% sunelev=-32.1deg (moon at 102.0deg phase=0.37 elev=-32.0 )
AL_20110209_034624170_000001_71810301     0 star  filter C [23643.0s - 23733.0s] expo= 90s elev= 5.2deg humid= 29% sunelev=-31.7deg (moon at 102.0deg phase=0.37 elev=-32.0 )
AL_20110209_034808639_000001_71810301     0 star  filter C [23747.4s - 23837.4s] expo= 90s elev= 5.5deg humid= 29% sunelev=-31.4deg (moon at 102.0deg phase=0.37 elev=-32.0 )
AL_20110209_034953801_000001_71810301    40 stars filter R [23852.5s - 23942.5s] expo= 90s elev= 5.8deg humid= 29% sunelev=-31.1deg (moon at 102.0deg phase=0.37 elev=-32.0 )
AL_20110209_035728786_000001_71810401    57 stars filter C [24217.6s - 24397.6s] expo=180s elev= 6.9deg humid= 30% sunelev=-30.0deg (moon at 103.0deg phase=0.37 elev=-32.0 )
AL_20110209_040401238_000001_71810401    63 stars filter R [24607.4s - 24787.4s] expo=180s elev= 8.1deg humid= 31% sunelev=-28.9deg (moon at 103.0deg phase=0.37 elev=-32.0 )
AL_20110209_040715693_000001_71810401    56 stars filter C [24801.9s - 24981.9s] expo=180s elev= 8.6deg humid= 32% sunelev=-28.3deg (moon at 103.0deg phase=0.37 elev=-32.0 )
AL_20110209_041030888_000001_71810401    66 stars filter C [24997.0s - 25177.0s] expo=180s elev= 9.2deg humid= 32% sunelev=-27.7deg (moon at 103.0deg phase=0.37 elev=-32.0 )
AL_20110209_041345340_000001_71810401    64 stars filter R [25191.4s - 25371.4s] expo=180s elev= 9.7deg humid= 31% sunelev=-27.1deg (moon at 103.0deg phase=0.37 elev=-32.0 )
AL_20110209_041736185_000001_71810501    69 stars filter C [25422.3s - 25602.3s] expo=180s elev=10.4deg humid= 31% sunelev=-26.4deg (moon at 103.0deg phase=0.37 elev=-32.0 )
AL_20110209_042051070_000001_71810501    64 stars filter C [25617.2s - 25797.2s] expo=180s elev=11.0deg humid= 30% sunelev=-25.9deg (moon at 103.0deg phase=0.37 elev=-32.0 )
AL_20110209_042405772_000001_71810501    66 stars filter R [25811.9s - 25991.9s] expo=180s elev=11.5deg humid= 30% sunelev=-25.3deg (moon at 103.0deg phase=0.37 elev=-31.0 )
AL_20110209_042720945_000001_71810501    81 stars filter C [26007.1s - 26187.1s] expo=180s elev=12.1deg humid= 30% sunelev=-24.7deg (moon at 103.0deg phase=0.37 elev=-31.0 )
AL_20110209_043035608_000001_71810501    86 stars filter C [26201.7s - 26381.7s] expo=180s elev=12.6deg humid= 30% sunelev=-24.1deg (moon at 103.0deg phase=0.37 elev=-31.0 )
AL_20110209_043350500_000001_71810501    80 stars filter R [26396.7s - 26576.7s] expo=180s elev=13.2deg humid= 30% sunelev=-23.5deg (moon at 103.0deg phase=0.37 elev=-31.0 )
AL_20110209_043737703_000001_71810601    81 stars filter C [26623.8s - 26803.8s] expo=180s elev=13.8deg humid= 30% sunelev=-22.8deg (moon at 103.0deg phase=0.37 elev=-31.0 )
AL_20110209_044052370_000001_71810601    88 stars filter C [26818.5s - 26998.5s] expo=180s elev=14.4deg humid= 30% sunelev=-22.2deg (moon at 103.0deg phase=0.37 elev=-31.0 )
AL_20110209_044407026_000001_71810601    89 stars filter R [27013.2s - 27193.2s] expo=180s elev=14.9deg humid= 30% sunelev=-21.6deg (moon at 103.0deg phase=0.37 elev=-31.0 )
AL_20110209_044721480_000001_71810601    95 stars filter C [27207.6s - 27387.6s] expo=180s elev=15.4deg humid= 30% sunelev=-21.1deg (moon at 103.0deg phase=0.37 elev=-30.0 )
AL_20110209_045035940_000001_71810601   100 stars filter C [27402.1s - 27582.1s] expo=180s elev=16.0deg humid= 29% sunelev=-20.5deg (moon at 103.0deg phase=0.37 elev=-30.0 )
AL_20110209_045350846_000001_71810601    80 stars filter R [27597.0s - 27777.0s] expo=180s elev=16.5deg humid= 29% sunelev=-19.9deg (moon at 103.0deg phase=0.37 elev=-30.0 )
AL_20110209_045739424_000001_71810701    98 stars filter C [27825.6s - 28005.6s] expo=180s elev=17.1deg humid= 29% sunelev=-19.2deg (moon at 103.0deg phase=0.37 elev=-30.0 )
AL_20110209_050054091_000001_71810701    84 stars filter C [28020.2s - 28200.2s] expo=180s elev=17.7deg humid= 29% sunelev=-18.6deg (moon at 103.0deg phase=0.37 elev=-30.0 )
AL_20110209_050408590_000001_71810701    92 stars filter R [28214.7s - 28394.7s] expo=180s elev=18.2deg humid= 29% sunelev=-18.0deg (moon at 103.0deg phase=0.37 elev=-29.0 )
AL_20110209_050722982_000001_71810701   104 stars filter C [28409.1s - 28589.1s] expo=180s elev=18.7deg humid= 29% sunelev=-17.4deg (moon at 103.0deg phase=0.37 elev=-29.0 )
AL_20110209_051037435_000001_71810701   106 stars filter C [28603.6s - 28783.6s] expo=180s elev=19.2deg humid= 29% sunelev=-16.9deg (moon at 103.0deg phase=0.37 elev=-29.0 )
AL_20110209_051349271_000001_71810701   104 stars filter R [28798.0s - 28978.0s] expo=180s elev=19.8deg humid= 29% sunelev=-16.3deg (moon at 103.0deg phase=0.37 elev=-29.0 )
AL_20110209_051738724_000001_71810801    96 stars filter C [29027.5s - 29207.5s] expo=180s elev=20.4deg humid= 29% sunelev=-15.6deg (moon at 103.0deg phase=0.37 elev=-29.0 )
AL_20110209_052053667_000001_71810801   101 stars filter C [29222.4s - 29402.4s] expo=180s elev=20.9deg humid= 28% sunelev=-15.0deg (moon at 103.0deg phase=0.37 elev=-28.0 )
AL_20110209_052408853_000001_71810801    86 stars filter R [29417.6s - 29597.6s] expo=180s elev=21.4deg humid= 28% sunelev=-14.4deg (moon at 103.0deg phase=0.37 elev=-28.0 )
AL_20110209_052723245_000001_71810801    95 stars filter C [29612.0s - 29792.0s] expo=180s elev=21.9deg humid= 27% sunelev=-13.8deg (moon at 103.0deg phase=0.37 elev=-28.0 )
AL_20110209_053037964_000001_71810801    90 stars filter C [29806.7s - 29986.7s] expo=180s elev=22.4deg humid= 27% sunelev=-13.3deg (moon at 104.0deg phase=0.37 elev=-27.0 )
AL_20110209_053352829_000001_71810801    71 stars filter R [30001.6s - 30181.6s] expo=180s elev=22.9deg humid= 27% sunelev=-12.7deg (moon at 104.0deg phase=0.37 elev=-27.0 )
AL_20110209_053740484_000001_71810901     0 star  filter C [30229.3s - 30409.3s] expo=180s elev=23.5deg humid= 27% sunelev=-12.0deg (moon at 104.0deg phase=0.37 elev=-27.0 )
AL_20110209_054410309_000001_71810901    43 stars filter R [30619.1s - 30799.1s] expo=180s elev=24.5deg humid= 27% sunelev=-10.8deg (moon at 104.0deg phase=0.37 elev=-26.0 )
AL_20110209_054725685_000001_71810901     0 star  filter C [30814.5s - 30994.5s] expo=180s elev=24.9deg humid= 27% sunelev=-10.3deg (moon at 104.0deg phase=0.37 elev=-26.0 )
AL_20110209_055357917_000001_71810901     0 star  filter R [31204.1s - 31384.1s] expo=180s elev=25.9deg humid= 27% sunelev=-9.1deg (moon at 104.0deg phase=0.37 elev=-25.0 )
AL_20110209_060424677_000001_71811001     0 star  filter R [31830.8s - 32010.8s] expo=180s elev=27.4deg humid= 27% sunelev=-7.3deg (moon at 104.0deg phase=0.37 elev=-24.0 )
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=27.361887 lat=0.008159
NASA/IPAC-Extragalactic-Database tool for calculate an extinction

Extinction from Schlegel et al. (1998, ApJ 500, 525): E(B-V)=19.941
Assuming Rv=3.1: Av=66.103 Ar=53.302 Ai=38.685 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 110208: TAROT Calern observatory optical observations
Klotz A. (CESR-OMP), Gendre B. (ASDC),
Boer M. (OHP-OAMP), Atteia J.L. (LATT-OMP) report:

We imaged the field of GRB 110208 detected by SWIFT
(trigger 445038) with the TAROT robotic telescope (D=25cm)
located at the Calern observatory, France.

The observations started 22187.4s after the GRB trigger
(XXXs after the notice). The elevation of the field increased from
1 degrees above horizon and weather conditions
were XXX.

---- NO
The date of trigger : t0 = 2011-02-08T21:10:46.272

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+22187.4s to t0+22247.4s : R > 15.1

The second image is 30.0s exposure in tracking mode:
t0+22307.2s to t0+22337.2s : R > 16.2

We co-added a series of exposures:
t0+22307.2s to t0+23066.4s : 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 22187.4s 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= 27.3619 lat= +0.0082
and the galactic extinction in R band is 53.3 magnitudes
estimated from D. Schlegel et al. 1998ApJ...500..525S.

This message may be cited.