Tuesday, April 20, 2010

Fermi LAT weekly report N. 97



Covered period: 2010.Apr.12 2010.Apr.18

LAT Mission week: 97.57 - 98.57





  • 3C 454.3 detected in high state again this week, although seems fading. At the beginning of the week, on April 13, it reached a daily maximum flux of (13.4 +/- 0.9 ) e-6 while it has been detected with a flux of (7.3 +/- 0.7)e-6 in the last day.


  • PKS 0537-441 active during the first days of the week (daily flux above 1e-6), then fading but maintaining a daily flux less above 0.6 e-6.


  • PKS 1510-08 observed on April 14 with daily flux of (1.2 +/- 0.3) e-6.


  • 4C 21.35 exhibited a high state (daily flux value about 1e-6 most of the week).


  • Sporadica appearance from 4C 14.23, PKS 0426-380, 4C 38.41, S5 0716+714, GB6 0850+4854 and PKS 0446+11 .


    Fluxes are in the units of photons/cm2/s above 100 MeV. All errors are statistical only.


    Note. All the fluxes reported above are from the ASP analysis and should be considered preliminary and should not be used for publication, however they are indicative of the flux range and the current status of a source. Source association is done on the basis of source location, considering spatial coincidence only, and it is not indicative of an identification. Please acknowledge the LAT team if you use information from this report.

    For questions and comments please contact:


    - Sara Buson (buson[at]pd.infn.it) and Stefano Ciprini (stefano.ciprini[at]pg.infn.it) for generic information related to this week.


    - Contact persons on this page for individual sources cited above.



Monday, April 19, 2010

Fermi LAT weekly report N. 96



Covered period: 2010.Apr.05 - 2010.Apr.11

LAT Mission week: 96.57 - 97.57





  • 3C 454.3 flared reaching peak daily gamma-ray flux of
    (15.8 +/-1.0)x10^-6 on April 8.

  • PKS B0906+015: a fast flare detected on April 8, reported in ATel #2543.

  • Other extragalactic sources seen on daily timescale during this week include:
    GC 0109+224 (S2 0109+22, detected on Apr. 6, 7),
    PKS 0426-380 (Apr. 5, 9, 11),
    PKS 0537-441 (Apr. 5, 9, 10, 11),
    PKS 1510-08 (Apr. 5, 9, 10, 11),
    PKS 1622-253 (Apr. 5, 11),
    4C +21.35 (Apr. 11),
    PKS 2142-75 (Apr. 9, 11),
    OX 169 (Apr. 10).


Fluxes are in the unit of photons/cm2/s above 100 MeV. All errors are statistical only.



Note. All the fluxes reported above are from the ASP analysis and should be considered preliminary and should not be used for publication, however they are indicative of the flux range and the current status of a source. Source association is done on the basis of source location, considering spatial coincidence only, and it is not indicative of an identification.
- Please acknowledge the LAT team if you use information from this report.


For questions and comments please contact:

-Kirill Sokolovsky (ksokolov[at]mpifr-bonn.mpg.de) and Frank Schinzel (schinzel[at]mpifr-bonn.mpg.de) for generic information related to this week.

- Contact persons on this page for individual sources cited above.




Thursday, April 15, 2010

Extra note - Apr. 15, 2010



About source reported in ATel#2552




Following the announcement by the AGILE team (ATel#2552) of the possible detection of a new unidentified gamma-ray source (AGL J0906-1241) the LAT data for the same sky position and time period are checked. Preliminary analysis points out no detection above 100 MeV by Fermi LAT as well as no visible photon-excess in the count map region around the specified position.

For questions and comments please contact the Flare Advocate on shif (buson[at]pd.infn.it and stefano.ciprini[at]pg.infn.it)