Important Note
The initial draft (very bottom) was for flaring of two sources. The first one (1749+701) did have a recent ATEL #3171 so the new draft is only for the latter source (J0742+5444)
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Fermi LAT detection of a GeV flare from HB89 1749BZU J0742+7015444
Davide Donato (NASA/GSFC); on behalf of the Fermi Large Area Telescope Collaboration.
The Large Area Telescope (LAT), one of the two instruments on the Fermi Gamma-ray Space Telescope, has observed a bright gamma-ray flare from a source positionally consistent with the flat spectrum radio quasar, source, 87GB 073840.5+545138 = BZU J0742+5444 (RA: 07h42m39.8s, Dec: +54d44m25s, J2000, A. J. Beasley et al. 2002, ApJS, 141, 13; ) with z=0.72 , B. Punsly 1999, ApJ, 51, 141(J. Halpern et al. 2003, AJ, 125, 572).
Preliminary analysis indicates that on February 26, 2011 the source was in a high state with a gamma-ray flux (E>100MeV) of (1.2+/-0.3) x 10^-6 ph cm^-2 s^-1 (errors error is statistical only). This value represent represents an increase of a factor of ~20 with respect to the flux reported in the 1FGL catalog (Abdo et al. 2010, ApJS, 188, 405), which reports the average flux from August 2008 through June 2009.
Because Fermi operates in an all-sky scanning mode, regular gamma-ray monitoring of this source will continue. The Fermi LAT contact people person for this source is Davide Donato (donato@milkyway.gsfc.nasa.gov).
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