Very-high-energy gamma-ray emission from PKS 1441+25 detected with VERITAS
ATel #7433; Reshmi Mukherjee (Barnard College, Columbia University)
on 23 Apr 2015; 03:37 UT
Credential Certification: Jamie Holder (jholder@physics.udel.edu)
Subjects: Gamma Ray, TeV, VHE, AGN, Blazar
The VERITAS collaboration reports the detection of very-high-energy (VHE)
gamma-ray emission from the flat spectrum radio quasar PKS 1441+25
(z=0.939) during the night of April 21, 2015 (UT). Observations were
triggered by the discovery of VHE emission from PKS 1441+25 with the
MAGIC telescope (see ATel #7416). Flaring activity in optical, X-rays
and gamma rays has also been recently detected (see ATel #7402, #7417,
#7429). VERITAS observed the quasar for about 4 hours, detecting it
at a significant level above 5 standard deviations. Preliminary
analysis indicates that the source flux was 8.0 +/- 1.5 (stat) e-11 cm^-2 s^-1
above 80 GeV. VERITAS will continue to monitor the source for the
next few days (weather permitting). Multi-wavelength observations are
highly encouraged. The VERITAS contact person is Reshmi Mukherjee
(muk@astro.columbia.edu). VERITAS (Very Energetic Radiation Imaging
Telescope Array System) is a very-high-energy gamma-ray observatory
located at the Fred Lawrence Whipple Observatory in southern Arizona,
USA.
