Optical follow-up of FSRQ OP313 using 1.3 m Devasthal Fast Optical Telescope (DFOT)
ATel #16614; Khushboo Sharma (ARIES), Anshika Gupta (ARIES), Kuntal Misra (ARIES), Jagdish C Joshi (ARIES), Pratik Majumdar (SINP))
on 6 May 2024; 04:00 UT
Credential Certification: Jagdish Joshi (jagdish@aries.res.in)
The FSRQ OP313 (also known as B2 1308+326) located at R.A = 13:10:28.66, DEC +32:20:43.77 (J2000) was reported in an active state by Fermi-LAT collaboration (ATel #16356). A simultaneous optical activity was also reported by some of the ground-based optical telescopes, reporting R-band magnitude values of approx. in range 14.3-14.7, see ATels #16360, #16515. The activity state in gamma-rays and X-rays of this object has been continuously monitored by the Fermi-LAT, SWIFT-XRT, see ATeLs #16497, #16504. During these active states, we also performed the multiband optical observations of this source using 1.3m DFOT at ARIES. The calibrated source photometry, with respect to the reference stars A, B, and C from Smith et al. (1985, AJ, 90, 1184), in the U, B, V, R, and I bands are MJD (60354.86565972, 60354.83302083, 60354.81625000, 60354.80637731, 60354.79392361), Magnitude (15.027, 15.494, 14.990, 14.674, 14.092), and Mag Error (0.006, 0.006, 0.004, 0.004, 0.004), respectively. We compared our observed R band magnitude for this source with ATels #16360, #16515 and the obtained values are consistent with each other.
