Fermi LAT observed another strong GeV flare from 4C 21.35 (PKS 1222+21)

Details Fermi LAT observed another strong GeV flare from 4C 21.35 (PKS 1222+21) Fermi LAT observed another strong GeV flare from 4C 21.35 (PKS 1222+21)

Apr 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010atel.2584....1d&link_type=abstract

The Astronomer's Telegram, #2584

Astronomy and Astrophysics

Astronomy

7

Gamma Ray, Quasars

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 flaring activity from a source positionally consistent with 4C 21.35 (also known as PKS 1222+21, RA: 12h24m54.5s, Dec: +21d22m46.4s, J2000, Beasley et al. 2002, ApJS, 141, 13). Preliminary analysis indicates that the source on April 24 2010 showed a bright flare with a daily flux (E>100MeV) of (8.1 ± 0.7) × 10^- 6 photons cm^- 2 s^- 1 (statistical only), which represents an increase by a factor of about 4 with respect to the average flux level in the past 2 weeks and more than twice as high as the peak reported in Atel #2349 (Dec 16th, 2009).

Affiliated with

Also associated with

No associations

Rating

Fermi LAT observed another strong GeV flare from 4C 21.35 (PKS 1222+21) does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Fermi LAT observed another strong GeV flare from 4C 21.35 (PKS 1222+21), we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Fermi LAT observed another strong GeV flare from 4C 21.35 (PKS 1222+21) will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1311276