Fermi LAT detection of increasing gamma-ray activity of blazar 4C +28.07

Details Fermi LAT detection of increasing gamma-ray activity of blazar 4C +28.07 Fermi LAT detection of increasing gamma-ray activity of blazar 4C +28.07

Oct 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011atel.3670....1s&link_type=abstract

The Astronomer's Telegram, #3670

Astronomy and Astrophysics

Astronomy

1

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

Scientific paper

The Large Area Telescope (LAT), one of the two instruments on the Fermi Gamma-ray Space Telescope, has observed an increasing gamma-ray flux from a source positionally consistent with 4C +28.07 (RA: 2h37m52.406s, Dec: +28d48m8.990s, J2000, Fey et al. 2004, AJ, 127, 3587) at z=1.207 (Veron-Cetty & Veron 1998).
Preliminary analysis indicates that the source on 3 October 2011 was in a high state with a gamma-ray flux (E>100MeV) of (1.4 ±0.3) x 10^-6 photons cm^-2 s^-1 (statistical uncertainty only).

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