GRB110218_071156_SWIFT at TAROT Calern observatory

TAROT Calern observatory log of images

AL_20110219_023933023_000001_73848701     0 star  filter C [883661.7s - 883721.7s] expo= 60s elev= 0.6deg humid= 61% sunelev=-40.6deg (moon at 120.0deg phase=0.93 elev=+38.0 )
AL_20110219_024017681_000001_73848701     0 star  filter C [883736.4s - 883766.4s] expo= 30s elev= 0.8deg humid= 61% sunelev=-40.4deg (moon at 120.0deg phase=0.93 elev=+37.0 )
AL_20110219_024103320_000001_73848701     0 star  filter C [883782.0s - 883812.0s] expo= 30s elev= 0.9deg humid= 61% sunelev=-40.3deg (moon at 120.0deg phase=0.93 elev=+37.0 )
AL_20110219_024148914_000001_73848701     0 star  filter C [883827.6s - 883857.6s] expo= 30s elev= 1.0deg humid= 61% sunelev=-40.2deg (moon at 120.0deg phase=0.93 elev=+37.0 )
AL_20110219_024234290_000001_73848701     0 star  filter C [883873.0s - 883903.0s] expo= 30s elev= 1.1deg humid= 61% sunelev=-40.1deg (moon at 120.0deg phase=0.93 elev=+37.0 )
AL_20110219_024319493_000001_73848701     0 star  filter C [883918.2s - 883948.2s] expo= 30s elev= 1.2deg humid= 61% sunelev=-39.9deg (moon at 120.0deg phase=0.93 elev=+37.0 )
AL_20110219_024806111_000001_73848801     0 star  filter C [884142.2s - 884232.2s] expo= 90s elev= 1.9deg humid= 61% sunelev=-39.3deg (moon at 120.0deg phase=0.93 elev=+36.0 )
AL_20110219_025136189_000001_73848801     0 star  filter R [884352.3s - 884442.3s] expo= 90s elev= 2.5deg humid= 61% sunelev=-38.8deg (moon at 120.0deg phase=0.93 elev=+36.0 )
AL_20110219_025321516_000001_73848801     0 star  filter C [884457.7s - 884547.7s] expo= 90s elev= 2.8deg humid= 62% sunelev=-38.5deg (moon at 120.0deg phase=0.93 elev=+36.0 )
AL_20110219_025506486_000001_73848801     0 star  filter C [884562.6s - 884652.6s] expo= 90s elev= 3.1deg humid= 62% sunelev=-38.2deg (moon at 120.0deg phase=0.93 elev=+35.0 )
AL_20110219_025649302_000001_73848801     0 star  filter R [884668.0s - 884758.0s] expo= 90s elev= 3.4deg humid= 62% sunelev=-37.9deg (moon at 120.0deg phase=0.93 elev=+35.0 )
AL_20110219_025912255_000001_73848901     0 star  filter C [884810.9s - 884900.9s] expo= 90s elev= 3.8deg humid= 63% sunelev=-37.5deg (moon at 120.0deg phase=0.93 elev=+35.0 )
AL_20110219_030057162_000001_73848901     0 star  filter C [884915.8s - 885005.8s] expo= 90s elev= 4.1deg humid= 64% sunelev=-37.2deg (moon at 120.0deg phase=0.93 elev=+35.0 )
AL_20110219_030242022_000001_73848901     0 star  filter R [885020.8s - 885110.8s] expo= 90s elev= 4.4deg humid= 64% sunelev=-36.9deg (moon at 120.0deg phase=0.93 elev=+34.0 )
AL_20110219_030427194_000001_73848901     0 star  filter C [885125.9s - 885215.9s] expo= 90s elev= 4.7deg humid= 64% sunelev=-36.6deg (moon at 120.0deg phase=0.93 elev=+34.0 )
AL_20110219_030612623_000001_73848901     0 star  filter C [885231.3s - 885321.3s] expo= 90s elev= 5.0deg humid= 64% sunelev=-36.3deg (moon at 120.0deg phase=0.93 elev=+34.0 )
AL_20110219_030757998_000001_73848901     0 star  filter R [885336.7s - 885426.7s] expo= 90s elev= 5.3deg humid= 64% sunelev=-36.0deg (moon at 120.0deg phase=0.93 elev=+34.0 )
AL_20110219_032157257_000001_73849001    32 stars filter R [886083.4s - 886263.4s] expo=180s elev= 7.6deg humid= 65% sunelev=-33.9deg (moon at 120.0deg phase=0.93 elev=+32.0 )
AL_20110219_033140390_000001_73849001    51 stars filter R [886669.0s - 886849.0s] expo=180s elev= 9.3deg humid= 65% sunelev=-32.2deg (moon at 120.0deg phase=0.93 elev=+30.0 )
AL_20110219_033526561_000001_73849101     0 star  filter C [886895.3s - 887075.3s] expo=180s elev=10.0deg humid= 64% sunelev=-31.6deg (moon at 120.0deg phase=0.93 elev=+29.0 )
AL_20110219_033841728_000001_73849101     0 star  filter C [887090.4s - 887270.4s] expo=180s elev=10.5deg humid= 64% sunelev=-31.0deg (moon at 120.0deg phase=0.93 elev=+29.0 )
AL_20110219_034157073_000001_73849101    56 stars filter R [887285.8s - 887465.8s] expo=180s elev=11.1deg humid= 64% sunelev=-30.4deg (moon at 120.0deg phase=0.93 elev=+28.0 )
AL_20110219_034830429_000001_73849101     0 star  filter C [887676.6s - 887856.6s] expo=180s elev=12.2deg humid= 64% sunelev=-29.3deg (moon at 120.0deg phase=0.93 elev=+27.0 )
AL_20110219_035145586_000001_73849101    68 stars filter R [887871.7s - 888051.7s] expo=180s elev=12.7deg humid= 65% sunelev=-28.7deg (moon at 119.0deg phase=0.93 elev=+27.0 )
AL_20110219_035531602_000001_73849201    77 stars filter C [888097.7s - 888277.7s] expo=180s elev=13.4deg humid= 65% sunelev=-28.0deg (moon at 119.0deg phase=0.93 elev=+26.0 )
AL_20110219_035844206_000001_73849201     0 star  filter C [888292.9s - 888472.9s] expo=180s elev=13.9deg humid= 65% sunelev=-27.5deg (moon at 119.0deg phase=0.93 elev=+26.0 )
AL_20110219_040158817_000001_73849201    72 stars filter R [888487.5s - 888667.5s] expo=180s elev=14.5deg humid= 65% sunelev=-26.9deg (moon at 119.0deg phase=0.93 elev=+25.0 )
AL_20110219_040513269_000001_73849201     0 star  filter C [888682.0s - 888862.0s] expo=180s elev=15.0deg humid= 66% sunelev=-26.3deg (moon at 119.0deg phase=0.93 elev=+25.0 )
AL_20110219_040828407_000001_73849201    81 stars filter C [888877.1s - 889057.1s] expo=180s elev=15.6deg humid= 66% sunelev=-25.7deg (moon at 119.0deg phase=0.93 elev=+24.0 )
AL_20110219_041144079_000001_73849201    71 stars filter R [889072.7s - 889252.7s] expo=180s elev=16.1deg humid= 66% sunelev=-25.1deg (moon at 119.0deg phase=0.93 elev=+24.0 )
AL_20110219_041539562_000001_73849301    79 stars filter C [889308.3s - 889488.3s] expo=180s elev=16.8deg humid= 67% sunelev=-24.4deg (moon at 119.0deg phase=0.93 elev=+23.0 )
AL_20110219_041854711_000001_73849301    79 stars filter C [889503.4s - 889683.4s] expo=180s elev=17.3deg humid= 67% sunelev=-23.9deg (moon at 119.0deg phase=0.93 elev=+22.0 )
AL_20110219_042210352_000001_73849301    68 stars filter R [889699.0s - 889879.0s] expo=180s elev=17.8deg humid= 67% sunelev=-23.3deg (moon at 119.0deg phase=0.93 elev=+22.0 )
AL_20110219_042525727_000001_73849301    75 stars filter C [889894.4s - 890074.4s] expo=180s elev=18.3deg humid= 66% sunelev=-22.7deg (moon at 119.0deg phase=0.93 elev=+21.0 )
AL_20110219_042843912_000001_73849301    79 stars filter C [890090.0s - 890270.0s] expo=180s elev=18.9deg humid= 66% sunelev=-22.1deg (moon at 119.0deg phase=0.93 elev=+21.0 )
AL_20110219_043159038_000001_73849301    77 stars filter R [890285.1s - 890465.1s] expo=180s elev=19.4deg humid= 66% sunelev=-21.5deg (moon at 119.0deg phase=0.93 elev=+20.0 )
AL_20110219_043535771_000001_73849401    82 stars filter C [890501.9s - 890681.9s] expo=180s elev=20.0deg humid= 68% sunelev=-20.9deg (moon at 119.0deg phase=0.93 elev=+20.0 )
AL_20110219_043850918_000001_73849401    85 stars filter C [890697.0s - 890877.0s] expo=180s elev=20.5deg humid= 68% sunelev=-20.3deg (moon at 119.0deg phase=0.93 elev=+19.0 )
AL_20110219_044206044_000001_73849401    76 stars filter R [890892.2s - 891072.2s] expo=180s elev=21.0deg humid= 69% sunelev=-19.7deg (moon at 119.0deg phase=0.93 elev=+18.0 )
AL_20110219_044521200_000001_73849401    71 stars filter C [891087.3s - 891267.3s] expo=180s elev=21.5deg humid= 68% sunelev=-19.1deg (moon at 119.0deg phase=0.93 elev=+18.0 )
AL_20110219_044836108_000001_73849401    77 stars filter C [891282.2s - 891462.2s] expo=180s elev=22.0deg humid= 69% sunelev=-18.5deg (moon at 119.0deg phase=0.93 elev=+17.0 )
AL_20110219_045151279_000001_73849401    63 stars filter R [891477.4s - 891657.4s] expo=180s elev=22.5deg humid= 69% sunelev=-17.9deg (moon at 119.0deg phase=0.93 elev=+17.0 )
AL_20110219_045537294_000001_73849501    85 stars filter C [891703.4s - 891883.4s] expo=180s elev=23.1deg humid= 70% sunelev=-17.3deg (moon at 119.0deg phase=0.93 elev=+16.0 )
AL_20110219_045852629_000001_73849501    78 stars filter C [891898.8s - 892078.8s] expo=180s elev=23.6deg humid= 70% sunelev=-16.7deg (moon at 119.0deg phase=0.93 elev=+16.0 )
AL_20110219_050208520_000001_73849501    63 stars filter R [892094.6s - 892274.6s] expo=180s elev=24.1deg humid= 70% sunelev=-16.1deg (moon at 119.0deg phase=0.93 elev=+15.0 )
AL_20110219_050523646_000001_73849501    84 stars filter C [892289.7s - 892469.7s] expo=180s elev=24.6deg humid= 70% sunelev=-15.5deg (moon at 119.0deg phase=0.93 elev=+14.0 )
AL_20110219_050836211_000001_73849501    88 stars filter C [892484.9s - 892664.9s] expo=180s elev=25.1deg humid= 70% sunelev=-14.9deg (moon at 119.0deg phase=0.93 elev=+14.0 )
AL_20110219_051151132_000001_73849501    81 stars filter R [892679.8s - 892859.8s] expo=180s elev=25.5deg humid= 70% sunelev=-14.3deg (moon at 119.0deg phase=0.93 elev=+13.0 )
AL_20110219_051535945_000001_73849601    89 stars filter C [892904.6s - 893084.6s] expo=180s elev=26.1deg humid= 71% sunelev=-13.6deg (moon at 119.0deg phase=0.93 elev=+13.0 )
AL_20110219_051853445_000001_73849601    86 stars filter C [893099.6s - 893279.6s] expo=180s elev=26.5deg humid= 71% sunelev=-13.0deg (moon at 119.0deg phase=0.93 elev=+12.0 )
AL_20110219_052208397_000001_73849601    77 stars filter R [893294.5s - 893474.5s] expo=180s elev=27.0deg humid= 71% sunelev=-12.5deg (moon at 119.0deg phase=0.93 elev=+12.0 )
AL_20110219_052523305_000001_73849601     0 star  filter C [893489.4s - 893669.4s] expo=180s elev=27.5deg humid= 71% sunelev=-11.9deg (moon at 119.0deg phase=0.93 elev=+11.0 )
AL_20110219_053150335_000001_73849601    51 stars filter R [893879.0s - 894059.0s] expo=180s elev=28.4deg humid= 71% sunelev=-10.7deg (moon at 119.0deg phase=0.93 elev=+10.0 )
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=27.409010 lat=0.032417
NASA/IPAC-Extragalactic-Database tool for calculate an extinction

Extinction from Schlegel et al. (1998, ApJ 500, 525): E(B-V)=19.432
Assuming Rv=3.1: Av=64.417 Ar=51.942 Ai=37.698 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 110218: 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 110218 detected by SWIFT
(trigger 445038) with the TAROT robotic telescope (D=25cm)
located at the Calern observatory, France.

The observations started 883661.7s after the GRB trigger
(XXXs after the notice). The elevation of the field increased from
0 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+883661.7s to t0+883721.7s : R > 15.1

The second image is 30.0s exposure in tracking mode:
t0+883736.4s to t0+883766.4s : R > 16.2

We co-added a series of exposures:
t0+883736.4s to t0+884232.2s : 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 883661.7s 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= 27.4090 lat= +0.0324
and the galactic extinction in R band is 51.9 magnitudes
estimated from D. Schlegel et al. 1998ApJ...500..525S.

This message may be cited.