GRB171020_230711_SWIFT at TAROT Calern observatory

TAROT Calern observatory log of images

AL_20171020_230924086_000000_00000001     0 star  filter C [   68.1s -   128.1s] expo= 60s elev=58.5deg humid=  0% sunelev=-56.8deg (moon at 175.0deg phase=0.08 elev=-54.0 )
AL_20171020_231006914_000000_00000001     3 stars filter C [  141.0s -   171.0s] expo= 30s elev=58.6deg humid=  0% sunelev=-56.8deg (moon at 175.0deg phase=0.08 elev=-54.0 )
AL_20171020_231047399_000000_00000001     3 stars filter C [  181.5s -   211.5s] expo= 30s elev=58.7deg humid=  0% sunelev=-56.8deg (moon at 175.0deg phase=0.08 elev=-54.0 )
AL_20171020_231127227_000000_00000001     4 stars filter C [  221.3s -   251.3s] expo= 30s elev=58.7deg humid=  0% sunelev=-56.8deg (moon at 175.0deg phase=0.08 elev=-54.0 )
AL_20171020_231207539_000000_00000001     4 stars filter C [  261.6s -   291.6s] expo= 30s elev=58.8deg humid=  0% sunelev=-56.8deg (moon at 175.0deg phase=0.08 elev=-54.0 )
AL_20171020_231247820_000000_00000001     4 stars filter C [  301.9s -   331.9s] expo= 30s elev=58.8deg humid=  0% sunelev=-56.8deg (moon at 175.0deg phase=0.08 elev=-54.0 )
AL_20171020_231428336_000000_00000001     5 stars filter C [  342.4s -   432.4s] expo= 90s elev=58.9deg humid=  0% sunelev=-56.8deg (moon at 175.0deg phase=0.08 elev=-54.0 )
AL_20171020_231609070_000000_00000001     6 stars filter C [  443.1s -   533.1s] expo= 90s elev=59.1deg humid=  0% sunelev=-56.8deg (moon at 175.0deg phase=0.08 elev=-54.0 )
AL_20171020_231749367_000000_00000001     5 stars filter C [  543.4s -   633.4s] expo= 90s elev=59.2deg humid=  0% sunelev=-56.8deg (moon at 175.0deg phase=0.08 elev=-54.0 )
AL_20171020_231930563_000000_00000001     4 stars filter C [  644.6s -   734.6s] expo= 90s elev=59.3deg humid=  0% sunelev=-56.8deg (moon at 175.0deg phase=0.08 elev=-55.0 )
AL_20171020_232111110_000000_00000001     4 stars filter C [  745.1s -   835.1s] expo= 90s elev=59.5deg humid=  0% sunelev=-56.8deg (moon at 175.0deg phase=0.08 elev=-55.0 )
AL_20171020_232251626_000000_00000001     5 stars filter C [  845.7s -   935.7s] expo= 90s elev=59.6deg humid=  0% sunelev=-56.8deg (moon at 175.0deg phase=0.08 elev=-55.0 )
AL_20171020_232432391_000000_00000001     5 stars filter C [  946.4s -  1036.4s] expo= 90s elev=59.7deg humid=  0% sunelev=-56.8deg (moon at 175.0deg phase=0.08 elev=-55.0 )
AL_20171020_232612220_000000_00000001     5 stars filter C [ 1046.2s -  1136.2s] expo= 90s elev=59.8deg humid=  0% sunelev=-56.8deg (moon at 175.0deg phase=0.08 elev=-55.0 )
AL_20171020_232752251_000000_00000001     5 stars filter C [ 1146.3s -  1236.3s] expo= 90s elev=60.0deg humid=  0% sunelev=-56.8deg (moon at 175.0deg phase=0.08 elev=-55.0 )
AL_20171020_232932242_000000_00000001     4 stars filter C [ 1246.3s -  1336.3s] expo= 90s elev=60.1deg humid=  0% sunelev=-56.7deg (moon at 175.0deg phase=0.08 elev=-55.0 )
AL_20171020_233112367_000000_00000001     5 stars filter C [ 1346.4s -  1436.4s] expo= 90s elev=60.2deg humid=  0% sunelev=-56.7deg (moon at 175.0deg phase=0.08 elev=-55.0 )
AL_20171020_233252382_000000_00000001     4 stars filter C [ 1446.5s -  1536.5s] expo= 90s elev=60.3deg humid=  0% sunelev=-56.7deg (moon at 175.0deg phase=0.08 elev=-55.0 )
AL_20171020_233432632_000000_00000001     4 stars filter C [ 1546.7s -  1636.7s] expo= 90s elev=60.4deg humid=  0% sunelev=-56.6deg (moon at 175.0deg phase=0.08 elev=-56.0 )
AL_20171020_233742961_000000_00000001     7 stars filter C [ 1647.0s -  1827.0s] expo=180s elev=60.5deg humid=  0% sunelev=-56.6deg (moon at 175.0deg phase=0.08 elev=-56.0 )
AL_20171020_234053279_000000_00000001     7 stars filter C [ 1837.3s -  2017.3s] expo=180s elev=60.7deg humid=  0% sunelev=-56.5deg (moon at 175.0deg phase=0.08 elev=-56.0 )
AL_20171020_234403529_000000_00000001     5 stars filter C [ 2027.6s -  2207.6s] expo=180s elev=60.8deg humid=  0% sunelev=-56.4deg (moon at 175.0deg phase=0.08 elev=-56.0 )
AL_20171020_234713810_000000_00000001     6 stars filter C [ 2217.9s -  2397.9s] expo=180s elev=61.0deg humid=  0% sunelev=-56.3deg (moon at 175.0deg phase=0.08 elev=-56.0 )
AL_20171020_235023878_000000_00000001     5 stars filter C [ 2407.9s -  2587.9s] expo=180s elev=61.1deg humid=  0% sunelev=-56.2deg (moon at 175.0deg phase=0.08 elev=-56.0 )
AL_20171020_235334191_000000_00000001     7 stars filter C [ 2598.2s -  2778.2s] expo=180s elev=61.2deg humid=  0% sunelev=-56.0deg (moon at 175.0deg phase=0.08 elev=-56.0 )
AL_20171020_235644457_000000_00000001     7 stars filter C [ 2788.5s -  2968.5s] expo=180s elev=61.3deg humid=  0% sunelev=-55.9deg (moon at 175.0deg phase=0.08 elev=-56.0 )
AL_20171020_235954769_000000_00000001     7 stars filter C [ 2978.8s -  3158.8s] expo=180s elev=61.4deg humid=  0% sunelev=-55.7deg (moon at 175.0deg phase=0.08 elev=-57.0 )
AL_20171021_000304571_000000_00000001     7 stars filter C [ 3168.6s -  3348.6s] expo=180s elev=61.4deg humid=  0% sunelev=-55.5deg (moon at 175.0deg phase=0.08 elev=-57.0 )
AL_20171021_000614852_000000_00000001     7 stars filter C [ 3358.9s -  3538.9s] expo=180s elev=61.5deg humid=  0% sunelev=-55.3deg (moon at 175.0deg phase=0.08 elev=-57.0 )
AL_20171021_000925602_000000_00000001     7 stars filter C [ 3549.6s -  3729.6s] expo=180s elev=61.5deg humid=  0% sunelev=-55.1deg (moon at 175.0deg phase=0.08 elev=-57.0 )
AL_20171021_001235883_000000_00000001     8 stars filter C [ 3739.9s -  3919.9s] expo=180s elev=61.5deg humid=  0% sunelev=-54.9deg (moon at 175.0deg phase=0.08 elev=-57.0 )
AL_20171021_001546164_000000_00000001     6 stars filter C [ 3930.2s -  4110.2s] expo=180s elev=61.5deg humid=  0% sunelev=-54.7deg (moon at 175.0deg phase=0.08 elev=-57.0 )
AL_20171021_001856211_000000_00000001     7 stars filter C [ 4120.3s -  4300.3s] expo=180s elev=61.5deg humid=  0% sunelev=-54.4deg (moon at 175.0deg phase=0.08 elev=-57.0 )
AL_20171021_002206986_000000_00000001     6 stars filter C [ 4311.0s -  4491.0s] expo=180s elev=61.5deg humid=  0% sunelev=-54.2deg (moon at 175.0deg phase=0.08 elev=-57.0 )
AL_20171021_002517049_000000_00000001     7 stars filter C [ 4501.1s -  4681.1s] expo=180s elev=61.4deg humid=  0% sunelev=-53.9deg (moon at 175.0deg phase=0.08 elev=-57.0 )
AL_20171021_002827767_000000_00000001     5 stars filter C [ 4691.8s -  4871.8s] expo=180s elev=61.3deg humid=  0% sunelev=-53.6deg (moon at 175.0deg phase=0.08 elev=-57.0 )
AL_20171021_003138071_000000_00000001     7 stars filter C [ 4882.1s -  5062.1s] expo=180s elev=61.3deg humid=  0% sunelev=-53.3deg (moon at 175.0deg phase=0.08 elev=-57.0 )
AL_20171021_003448321_000000_00000001     4 stars filter C [ 5072.4s -  5252.4s] expo=180s elev=61.2deg humid=  0% sunelev=-53.0deg (moon at 175.0deg phase=0.08 elev=-57.0 )
AL_20171021_003758368_000000_00000001     7 stars filter C [ 5262.4s -  5442.4s] expo=180s elev=61.0deg humid=  0% sunelev=-52.7deg (moon at 175.0deg phase=0.08 elev=-57.0 )
AL_20171021_004108416_000000_00000001     7 stars filter C [ 5452.5s -  5632.5s] expo=180s elev=60.9deg humid=  0% sunelev=-52.4deg (moon at 175.0deg phase=0.08 elev=-57.0 )
AL_20171021_004418682_000000_00000001     5 stars filter C [ 5642.8s -  5822.8s] expo=180s elev=60.8deg humid=  0% sunelev=-52.1deg (moon at 175.0deg phase=0.08 elev=-56.0 )
AL_20171021_004728760_000000_00000001     5 stars filter C [ 5832.8s -  6012.8s] expo=180s elev=60.6deg humid=  0% sunelev=-51.7deg (moon at 175.0deg phase=0.08 elev=-56.0 )
AL_20171021_005038572_000000_00000001     7 stars filter C [ 6022.6s -  6202.6s] expo=180s elev=60.4deg humid=  0% sunelev=-51.4deg (moon at 175.0deg phase=0.08 elev=-56.0 )
AL_20171021_005348648_000000_00000001     6 stars filter C [ 6212.7s -  6392.7s] expo=180s elev=60.2deg humid=  0% sunelev=-51.0deg (moon at 175.0deg phase=0.08 elev=-56.0 )
AL_20171021_005658461_000000_00000001     6 stars filter C [ 6402.5s -  6582.5s] expo=180s elev=60.0deg humid=  0% sunelev=-50.7deg (moon at 175.0deg phase=0.08 elev=-56.0 )
AL_20171021_010008539_000000_00000001     6 stars filter C [ 6592.6s -  6772.6s] expo=180s elev=59.8deg humid=  0% sunelev=-50.3deg (moon at 175.0deg phase=0.08 elev=-56.0 )
AL_20171021_010318815_000000_00000001     5 stars filter C [ 6782.9s -  6962.9s] expo=180s elev=59.6deg humid=  0% sunelev=-49.9deg (moon at 175.0deg phase=0.08 elev=-56.0 )
AL_20171021_010629096_000000_00000001     5 stars filter C [ 6973.1s -  7153.1s] expo=180s elev=59.3deg humid=  0% sunelev=-49.5deg (moon at 175.0deg phase=0.09 elev=-55.0 )
AL_20171021_010939815_000000_00000001     7 stars filter C [ 7163.9s -  7343.9s] expo=180s elev=59.1deg humid=  0% sunelev=-49.1deg (moon at 175.0deg phase=0.09 elev=-55.0 )
AL_20171021_011249900_000000_00000001     7 stars filter C [ 7353.9s -  7533.9s] expo=180s elev=58.8deg humid=  0% sunelev=-48.7deg (moon at 175.0deg phase=0.09 elev=-55.0 )
AL_20171021_011600400_000000_00000001     5 stars filter C [ 7544.4s -  7724.4s] expo=180s elev=58.5deg humid=  0% sunelev=-48.3deg (moon at 175.0deg phase=0.09 elev=-55.0 )
AL_20171021_011911135_000000_00000001     7 stars filter C [ 7735.2s -  7915.2s] expo=180s elev=58.2deg humid=  0% sunelev=-47.9deg (moon at 175.0deg phase=0.09 elev=-55.0 )
AL_20171021_012221465_000000_00000001     7 stars filter C [ 7925.5s -  8105.5s] expo=180s elev=57.9deg humid=  0% sunelev=-47.5deg (moon at 175.0deg phase=0.09 elev=-54.0 )
AL_20171021_012531746_000000_00000001     5 stars filter C [ 8115.8s -  8295.8s] expo=180s elev=57.6deg humid=  0% sunelev=-47.1deg (moon at 175.0deg phase=0.09 elev=-54.0 )
AL_20171021_012841793_000000_00000001     5 stars filter C [ 8305.8s -  8485.8s] expo=180s elev=57.3deg humid=  0% sunelev=-46.6deg (moon at 175.0deg phase=0.09 elev=-54.0 )
AL_20171021_013152292_000000_00000001     7 stars filter C [ 8496.3s -  8676.3s] expo=180s elev=57.0deg humid=  0% sunelev=-46.2deg (moon at 175.0deg phase=0.09 elev=-54.0 )
AL_20171021_013503151_000000_00000001     6 stars filter C [ 8687.1s -  8867.1s] expo=180s elev=56.6deg humid=  0% sunelev=-45.7deg (moon at 175.0deg phase=0.09 elev=-53.0 )
AL_20171021_013813354_000000_00000001     8 stars filter C [ 8877.4s -  9057.4s] expo=180s elev=56.3deg humid=  0% sunelev=-45.3deg (moon at 175.0deg phase=0.09 elev=-53.0 )
AL_20171021_014123463_000000_00000001     7 stars filter C [ 9067.4s -  9247.4s] expo=180s elev=55.9deg humid=  0% sunelev=-44.8deg (moon at 175.0deg phase=0.09 elev=-53.0 )
AL_20171021_014433590_000000_00000001     7 stars filter C [ 9257.7s -  9437.7s] expo=180s elev=55.5deg humid=  0% sunelev=-44.4deg (moon at 175.0deg phase=0.09 elev=-52.0 )
AL_20171021_014743496_000000_00000001     6 stars filter C [ 9447.5s -  9627.5s] expo=180s elev=55.1deg humid=  0% sunelev=-43.9deg (moon at 175.0deg phase=0.09 elev=-52.0 )
AL_20171021_015053481_000000_00000001     5 stars filter C [ 9637.6s -  9817.6s] expo=180s elev=54.7deg humid=  0% sunelev=-43.4deg (moon at 175.0deg phase=0.09 elev=-52.0 )
AL_20171021_015403734_000000_00000001     7 stars filter C [ 9827.6s - 10007.6s] expo=180s elev=54.3deg humid=  0% sunelev=-42.9deg (moon at 175.0deg phase=0.09 elev=-51.0 )
AL_20171021_015714328_000000_00000001     5 stars filter C [10018.4s - 10198.4s] expo=180s elev=53.9deg humid=  0% sunelev=-42.5deg (moon at 175.0deg phase=0.09 elev=-51.0 )
AL_20171021_020024891_000000_00000001     5 stars filter C [10208.9s - 10388.9s] expo=180s elev=53.5deg humid=  0% sunelev=-42.0deg (moon at 175.0deg phase=0.09 elev=-51.0 )
AL_20171021_020334962_000000_00000001     7 stars filter C [10398.9s - 10578.9s] expo=180s elev=53.1deg humid=  0% sunelev=-41.5deg (moon at 175.0deg phase=0.09 elev=-50.0 )
AL_20171021_020645431_000000_00000001     5 stars filter C [10589.2s - 10769.2s] expo=180s elev=52.7deg humid=  0% sunelev=-41.0deg (moon at 175.0deg phase=0.09 elev=-50.0 )
AL_20171021_020955509_000000_00000001     7 stars filter C [10779.5s - 10959.5s] expo=180s elev=52.2deg humid=  0% sunelev=-40.5deg (moon at 175.0deg phase=0.09 elev=-50.0 )
AL_20171021_021306127_000000_00000001     5 stars filter C [10970.0s - 11150.0s] expo=180s elev=51.8deg humid=  0% sunelev=-40.0deg (moon at 175.0deg phase=0.09 elev=-49.0 )
AL_20171021_021616315_000000_00000001     4 stars filter C [11160.3s - 11340.3s] expo=180s elev=51.3deg humid=  0% sunelev=-39.5deg (moon at 175.0deg phase=0.09 elev=-49.0 )
AL_20171021_021926362_000000_00000001     8 stars filter C [11350.4s - 11530.4s] expo=180s elev=50.9deg humid=  0% sunelev=-39.0deg (moon at 175.0deg phase=0.09 elev=-49.0 )
AL_20171021_022237317_000000_00000001     7 stars filter C [11541.4s - 11721.4s] expo=180s elev=50.4deg humid=  0% sunelev=-38.5deg (moon at 175.0deg phase=0.09 elev=-48.0 )
AL_20171021_022547848_000000_00000001     5 stars filter C [11731.9s - 11911.9s] expo=180s elev=49.9deg humid=  0% sunelev=-37.9deg (moon at 175.0deg phase=0.09 elev=-48.0 )
AL_20171021_022858098_000000_00000001     6 stars filter C [11922.2s - 12102.2s] expo=180s elev=49.5deg humid=  0% sunelev=-37.4deg (moon at 175.0deg phase=0.09 elev=-47.0 )
AL_20171021_023208411_000000_00000001     5 stars filter C [12112.4s - 12292.4s] expo=180s elev=49.0deg humid=  0% sunelev=-36.9deg (moon at 175.0deg phase=0.09 elev=-47.0 )
AL_20171021_023519153_000000_00000001     6 stars filter C [12303.2s - 12483.2s] expo=180s elev=48.5deg humid=  0% sunelev=-36.4deg (moon at 175.0deg phase=0.09 elev=-46.0 )
AL_20171021_023829685_000000_00000001     6 stars filter C [12493.7s - 12673.7s] expo=180s elev=48.0deg humid=  0% sunelev=-35.8deg (moon at 175.0deg phase=0.09 elev=-46.0 )
AL_20171021_024139466_000000_00000001     7 stars filter C [12683.5s - 12863.5s] expo=180s elev=47.5deg humid=  0% sunelev=-35.3deg (moon at 175.0deg phase=0.09 elev=-46.0 )
AL_20171021_024449299_000000_00000001     7 stars filter C [12873.4s - 13053.4s] expo=180s elev=47.0deg humid=  0% sunelev=-34.8deg (moon at 175.0deg phase=0.09 elev=-45.0 )
AL_20171021_024759611_000000_00000001     7 stars filter C [13063.6s - 13243.6s] expo=180s elev=46.5deg humid=  0% sunelev=-34.2deg (moon at 175.0deg phase=0.09 elev=-45.0 )
AL_20171021_025110096_000000_00000001     7 stars filter C [13254.2s - 13434.2s] expo=180s elev=46.0deg humid=  0% sunelev=-33.7deg (moon at 175.0deg phase=0.09 elev=-44.0 )
AL_20171021_025420435_000000_00000001     5 stars filter C [13444.4s - 13624.4s] expo=180s elev=45.5deg humid=  0% sunelev=-33.2deg (moon at 175.0deg phase=0.09 elev=-44.0 )
AL_20171021_025730654_000000_00000001     5 stars filter C [13634.7s - 13814.7s] expo=180s elev=45.0deg humid=  0% sunelev=-32.6deg (moon at 175.0deg phase=0.09 elev=-43.0 )
AL_20171021_030041169_000000_00000001     6 stars filter C [13825.2s - 14005.2s] expo=180s elev=44.5deg humid=  0% sunelev=-32.1deg (moon at 175.0deg phase=0.09 elev=-43.0 )
AL_20171021_030351252_000000_00000001     6 stars filter C [14015.3s - 14195.3s] expo=180s elev=44.0deg humid=  0% sunelev=-31.5deg (moon at 175.0deg phase=0.09 elev=-42.0 )
AL_20171021_030701767_000000_00000001     7 stars filter C [14205.8s - 14385.8s] expo=180s elev=43.4deg humid=  0% sunelev=-31.0deg (moon at 175.0deg phase=0.09 elev=-42.0 )
AL_20171021_031012299_000000_00000001     4 stars filter C [14396.3s - 14576.3s] expo=180s elev=42.9deg humid=  0% sunelev=-30.4deg (moon at 175.0deg phase=0.09 elev=-42.0 )
AL_20171021_031322782_000000_00000001     6 stars filter C [14586.8s - 14766.8s] expo=180s elev=42.4deg humid=  0% sunelev=-29.9deg (moon at 175.0deg phase=0.09 elev=-41.0 )
AL_20171021_031633344_000000_00000001     6 stars filter C [14777.4s - 14957.4s] expo=180s elev=41.8deg humid=  0% sunelev=-29.3deg (moon at 175.0deg phase=0.09 elev=-41.0 )
AL_20171021_031943344_000000_00000001     4 stars filter C [14967.4s - 15147.4s] expo=180s elev=41.3deg humid=  0% sunelev=-28.8deg (moon at 175.0deg phase=0.09 elev=-40.0 )
AL_20171021_032254782_000000_00000001     2 stars filter C [15158.9s - 15338.9s] expo=180s elev=40.8deg humid=  0% sunelev=-28.2deg (moon at 175.0deg phase=0.09 elev=-40.0 )
AL_20171021_032605091_000000_00000001     2 stars filter C [15349.1s - 15529.1s] expo=180s elev=40.2deg humid=  0% sunelev=-27.6deg (moon at 175.0deg phase=0.09 elev=-39.0 )
AL_20171021_032915387_000000_00000001     4 stars filter C [15539.4s - 15719.4s] expo=180s elev=39.7deg humid=  0% sunelev=-27.1deg (moon at 175.0deg phase=0.09 elev=-39.0 )
AL_20171021_033225950_000000_00000001     2 stars filter C [15729.9s - 15909.9s] expo=180s elev=39.1deg humid=  0% sunelev=-26.5deg (moon at 175.0deg phase=0.09 elev=-38.0 )
AL_20171021_033535973_000000_00000001     1 star  filter C [15920.0s - 16100.0s] expo=180s elev=38.6deg humid=  0% sunelev=-26.0deg (moon at 175.0deg phase=0.09 elev=-38.0 )
AL_20171021_033846473_000000_00000001     2 stars filter C [16110.5s - 16290.5s] expo=180s elev=38.0deg humid=  0% sunelev=-25.4deg (moon at 175.0deg phase=0.09 elev=-37.0 )
AL_20171021_034157208_000000_00000001     4 stars filter C [16301.3s - 16481.3s] expo=180s elev=37.5deg humid=  0% sunelev=-24.8deg (moon at 174.0deg phase=0.09 elev=-37.0 )
AL_20171021_040706977_000000_91238801     1 star  filter C [17811.0s - 17991.0s] expo=180s elev=33.1deg humid=  0% sunelev=-20.3deg (moon at 174.0deg phase=0.09 elev=-33.0 )
AL_20171021_041016821_000000_91238801     1 star  filter C [18000.8s - 18180.8s] expo=180s elev=32.5deg humid=  0% sunelev=-19.8deg (moon at 174.0deg phase=0.10 elev=-32.0 )
AL_20171021_041327086_000000_91238801     1 star  filter C [18191.1s - 18371.1s] expo=180s elev=31.9deg humid=  0% sunelev=-19.2deg (moon at 174.0deg phase=0.10 elev=-32.0 )
AL_20171021_043128449_000000_91238901     6 stars filter C [19272.5s - 19452.5s] expo=180s elev=28.7deg humid=  0% sunelev=-15.9deg (moon at 174.0deg phase=0.10 elev=-29.0 )
AL_20171021_043438246_000000_91238901     4 stars filter C [19462.3s - 19642.3s] expo=180s elev=28.1deg humid=  0% sunelev=-15.4deg (moon at 174.0deg phase=0.10 elev=-28.0 )
AL_20171021_043748081_000000_91238901     6 stars filter C [19652.1s - 19832.1s] expo=180s elev=27.6deg humid=  0% sunelev=-14.8deg (moon at 174.0deg phase=0.10 elev=-27.0 )
AL_20171021_045552317_000000_91239001     2 stars filter C [20736.3s - 20916.3s] expo=180s elev=24.3deg humid=  0% sunelev=-11.5deg (moon at 174.0deg phase=0.10 elev=-24.0 )
AL_20171021_045903035_000000_91239001     1 star  filter C [20927.1s - 21107.1s] expo=180s elev=23.7deg humid=  0% sunelev=-11.0deg (moon at 174.0deg phase=0.10 elev=-24.0 )
AL_20171021_050213301_000000_91239001     0 star  filter C [21117.3s - 21297.3s] expo=180s elev=23.2deg humid=  0% sunelev=-10.4deg (moon at 174.0deg phase=0.10 elev=-23.0 )
Informations from GCN notice:
This is a GRB
Date of the alert : 2458047.46331887 2017-10-20T23:07:10.750
Decoded useful notice informations.
RA(J2000.0) : 39.2624 02h37m02s9
DEC(J2000.0) : 15.186 +15d11m09s59
Error radius : 3.0 arcmin

Other pages about TAROT Calern observatory observations

Sum of images.
Differential photometry.

Galactic coordinates

Galactic coordinates : lon=157.30928912 lat=-40.5317999469
NASA/IPAC-Extragalactic-Database tool for calculate an extinction

Extinction from Schlegel et al. (1998, ApJ 500, 525): E(B-V)=0.054
Assuming Rv=3.1: Av=0.181 Ar=0.146 Ai=0.106
extmap.fit: Extinction map E(B-V) from Schlegel:

Field of View is about 93 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 171020: TAROT Calern observatory optical observations
----------------------------------------------------------------------
Klotz A., Turpin D., Atteia J.L. (CNRS-OMP-IRAP),
Boer, M., Laugier, R. (CNRS-ARTEMIS),
Gendre B. (UVI - Etelman Obs.) report:

We imaged the field of GRB 171020 detected by SWIFT
(trigger 780845) with the TAROT robotic telescope (D=25cm)
located at the Calern observatory, France.

The observations started 68.1s after the GRB trigger
(12.9s after the notice). The elevation of the field increased from
58 degrees above horizon and weather conditions
were XXX.

---- NO
The date of trigger : t0 = 2017-10-20T23:07:10.750

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+68.1s to t0+128.1s : R > 15.1

The second image is 30.0s exposure in tracking mode:
t0+141.0s to t0+171.0s : R > 16.2

We co-added a series of exposures:
t0+141.0s to t0+432.4s : 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 68.1s 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=157.3093 lat=-40.5318
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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