Fermi LAT detection of increasing gamma-ray activity from the BL Lac Object S4 1749+70

Details Fermi LAT detection of increasing gamma-ray activity from the BL Lac Object S4 1749+70 Fermi LAT detection of increasing gamma-ray activity from the BL Lac Object S4 1749+70

Feb 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011atel.3171....1b&link_type=abstract

The Astronomer's Telegram, #3171

Astronomy and Astrophysics

Astronomy

1

>Gev, Blazar

Scientific paper

The Large Area Telescope (LAT) on board the Fermi Gamma-ray Space Telescope has observed an increasing gamma-ray flux from a source positionally consistent with the BL Lac Object S4 1749+70 (also known as 1FGL J1748.5+7004, Abdo et al. 2010, ApJS, 188, 405; R.A: 17:48:32.8401 Dec.: +70:05:50.768, J2000, Stickel et al. 1993, A&AS 98, 393) at redshift z=0.77 (Hughes et al. 1992, ApJ 396, 469). The source entered a higher state during the past week.

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