Tuesday, June 26, 2012

Fermi LAT weekly report N. 210

Covered period: 2012 June 11-17
LAT Mission week: 210.57 - 211.57

  • New LAT source detected clearly at least from June 14 and preliminary associated to the candidate blazar NRAO 676 (aka TXS 2159+505, a possible FSRQ placed at z=1.899). The source was detected in flaring state on June 16 with daily flux of (2.3 ± 0.3)E-6 (see ATel#4182).
  • The gamma-ray flaring activity of the BL Lac object PKS 2233-148 (see ATel#4152) continued and increased during this week. On June 13 the source reached a daily averaged flux level of about 2.8E-6 (almost 40 times the averaged flux over the first 2 years of survey).
  • The gravitationally lensed blazar PKS 1830-211 (see ATel#4158) continued to be in high state being detected at a level above 1E-6 most days of the week. The source reached a flux level of about 3E-6 on June 13.
  • Gamma-ray flaring activity of blazar OJ 287 detected at a level of about 1E-6 on June 17.
  • Solar Flare detected by the LAT in a 6h interval of June 14 (6h-bin averaged flux = 8E-6). This detection is spatially and temporally consistent with the M1.9 solar flare event that occurred the same day.
  • Blazars PKS 1510-08, B2 1520+31, B3 1343+451, CTA 102, PKS 1424-41, PKS 2233-148, PMN J2345-1555, 4C +04.42, detected in some days of the week in bright state (above about the flux level of 0.5E-6).
  • Sporadic daily detections of blazars, with a daily flux level below about 0.5E-6: 3C 66A, 4C +28.07, S5 0716+714, Mkn 421, PKS 2155-304, PKS 2326-502.

Fluxes are in the unit of photons/cm^2/s above 100 MeV. All uncertainties are statistical only.

Note. All the flux reported above are by 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: - S. Ciprini (stefano.ciprini[at]asdc.asi.it) for generic information related to this week - Contact persons on this page for individual sources cited above.

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