Optical fluxes of candidate neutrino blazar PKS 1502+106
ATel #12983; William Keel, Marcos Santander (Univ .of Alabama)
on 2 Aug 2019; 15:35 UT
Credential Certification: William Keel (wkeel@ua.edu)
Subjects: Optical, Neutrinos, Blazar
Referred to by ATel #: 12985
We obtained VRI imagery in the span from 0234-0442 UT on 1 August 2019 of the field of the flat-spectrum radio quasar (FSRQ) PKS 1502+106 suggested as a potential counterpart of the neutrino event IceCube-190730A (Atel #12967). Using the University of Alabama 0.4m telescope and SBIG CCD camera. Taking zero points from SDSS stars in the field transformed to the Johnson and Cousins bands, with uncertainties dominated by photon statistics, we derive magnitudes V>18.03, R=17.97 +/- 0.24, and I = 17.47 +/- 0.15. As found by the MASTER (Atel #12971) and ZTF (ATel #12974) results, we do not see evidence for a substantial optical outburst compared to previous published values (including the SDSS photometry). Our field of view also includes the low-redshift AGN Markarian 841. Within a radius of 7 arcseconds, we measure V=14.91 +/- 0.05, R=13.91 +/- 0.04, and I=13.65 +/- 0.04.
