Prompted by Atel #3120 of a strong Gamma-ray flare of the BL Lac object CGRaBS J0211+1051, we observed it on January 27.87 2011 with the 23 cm telescope on top the Department of Physics of La Sapienza University with an R_C filter and an Apogee U2 CCD camera. Eight comparison stars were taken from the GSC2.3 catalogue to define the source magnitude. The source appeared at R_C=13.37, definitely brighter that the historical GSC2.3 value of 15.11, based on the POSS I (year 1950) red plate.
Optical follow-up of 1FGL J0211.2+1049 / Nesci, Roberto. - ELETTRONICO. - (2011), pp. 3127-3127.
Optical follow-up of 1FGL J0211.2+1049
NESCI, Roberto
2011
Abstract
Prompted by Atel #3120 of a strong Gamma-ray flare of the BL Lac object CGRaBS J0211+1051, we observed it on January 27.87 2011 with the 23 cm telescope on top the Department of Physics of La Sapienza University with an R_C filter and an Apogee U2 CCD camera. Eight comparison stars were taken from the GSC2.3 catalogue to define the source magnitude. The source appeared at R_C=13.37, definitely brighter that the historical GSC2.3 value of 15.11, based on the POSS I (year 1950) red plate.File allegati a questo prodotto
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