Optical follow-up of PKS2134-004
ATel #12278; Roberto Nesci (INAF/IAPS - Roma)
on 8 Dec 2018; 21:16 UT
Credential Certification: Roberto Nesci (Roberto.Nesci@iaps.inaf.it)
Subjects: Optical, AGN, Blazar
Following the announcement of a Gamma Ray high state of PKS2134-004 (OX 057) in ATel #12273 by S. Ciprini and S. Buson, I have observed the source on 2018-12-08.75 with the 30cm telescope of the Foligno Observatory (IAU K56). Comparison stars were taken from the UCAC4 catalog and aperture photometry was made with IRAF/apphot: the source was detected at V=16.9 +-0.08. The magnitude of this FSRQ in the recent Gaia DR2 catalog is G=16.6, consistent with our value given the different passbands. A similar value is reported in the older GSC2.3.2 catalog (V=16.5). Apparently the enhancement in Gamma-ray flux is not related to the optical one, at variance with the majority of blazars.
