New flaring activity in PKS 1510-089

Details New flaring activity in PKS 1510-089 New flaring activity in PKS 1510-089

Jul 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011atel.3509....1h&link_type=abstract

The Astronomer's Telegram, #3509

Astronomy and Astrophysics

Astronomy

Optical, Gamma Ray, >Gev, Request For Observations, Agn, Blazar, Quasar, Transient

Scientific paper

Following the bright flare in PKS 1510-089 reported by the AGILE and Fermi-LAT teams in ATel #3470 and Atel #3473 and reports on activities in the radio band (ATel #3500) the Automatic Telescope for Optical Monitoring (ATOM) recorded an increase in the optical flux of this object on July 24-25 and July 25-26 (JD 2455767.3, 2455768.3) with R band magnitudes of 15.7 and 15.3, respectively. Variations of 25% were recorded on a timescale of one hour. Motivated by the increased activity of PKS 1510-089 in optical data a preliminary analysis of Fermi/LAT public data indicates that the source reached a gamma-ray (E>200 MeV) peak flux of (4.7 ± 0.7)e-6 ph cm-2 s-1 (statistical uncertainty only) centered on July 25, 2011 12:50 UTC, in an analysis performed with time bins of 4 hours.

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