MASTER optical follow-up observations of blazars PKS 0514-459

ATel #14644; K. Zhirkov, V. Lipunov, V. Kornilov, P. Balanutsa, I. Gorbunov, E. Gorbovskoy, O. Gress, N. Tyurina, A. Kuznetsov, V. Vladimirov, D. Vlasenko, D. Zimnukhov, V. Senik, V. Shumkov, A. Chasovnikov, E. Minkina, V. Topolev, D. Kuvshinov, T. Pogrosheva, V. Shumkov (Lomonosov Moscow State University), D/A/H/Buckley (SAAO), R. Podesta, F. Podesta, C. Lopez, C. Francile (Observatorio Astronomico Felix Aguilar OAFA), R. Rebolo, M. Serra (The Instituto de Astrofisica de Canarias), N. Budnev, O. Ershova (Irkutsk State University, API), A. Tlatov, D. Dormidontov (Kislovodsk Solar Station of the Pulkovo Observatory) A. Gabovich, V. Yurkov (Blagoveschensk Educational State University) on 19 May 2021; 10:47 UT
on 19 May 2021; 10:51 UT
Credential Certification: Nataly Tyurina (tiurina@sai.msu.ru)

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MASTER-NET reports on the enhanced optical activity and significant intranight variability of the gamma-ray flaring blazars PKS 0514-459 as reported by Fermi-LAT collaboration and AGILE team(ATel #14633, ATel #14634).

PKS 0514-459(RA=78.938542 DE=-45.945334 z=0.194)
has been observed by MASTER telescopes at MASTER-OAFA and MASTER-SAAO several times since the previous report on its X-ray and optical flare on 2020 December 6(ATel #14245) with no filter.
On the night from the 11 to 12 December 2020 it was detected at W=14.73+/-0.02 and W=14.89+/-0.02 3 hours later.
In the following days it was following this trend, on the December 16 W=15.48+/-0.02, on the December 18 it exhibited a weak optical flare, at 04:52 UTC W=15.66+/-0.02, at 08:04 UTC W=15.51+/-0.02.
After this it steadily reached 17.37+/-0.07 on the 2021 January 14.
Our observations resumed on the May 16 when the blazar showed 0.1 mag brightening in the span of 5 hours.
At 18:47 W=13.27+/-0.02, at 23:41 W=13.15+/-0.02.
On the same day at 19:25 UTC MASTER-SAAO observed the blazar in Jonhson V band, where it was detected at V=13.54+/-0.05.
There is a high possibility of the present flare being brighter than the one on the 2020 December 5.
We encourage further multiwavelength observations of the blazars.

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