Tuesday, April 24, 2012

Fermi LAT weekly report N.202



Covered period: 2012.Apr.16 - 2012.Apr.22

LAT Mission week: 202.57 - 203.57







  • S5 0716+71 and PKS 0454-234 detected through the week with daily flux in the range 0.3-0.5 X 10-6 and 0.9-1.4 X 10-6, respectively.


  • Sporadic activity (fluxes above 1.0 X 10-6) observed from 1510-089 (1.2 on Apr. 21) and CTA 102 (1.0 on Apr. 22).


  • Sporadic activity (fluxes below 1.0 X 10-6) observed from 1510-089 (0.7 on Apr. 21), PKS 2155-304 (0.2 on Apr. 16 and 20), Mkn 421 (0.2 and 0.3 on Apr. 17 and 21), B2 1520+31 (0.8 on Apr. 17), OJ 287 (0.5 on Apr. 19), B3 1343+451 (0.5 on Apr. 19), 4C +21.35 (0.4 on Apr. 19), PKS B1339-206 (0.8 on Apr. 21), PKS B1424-418 (0.4 on Apr. 21), PKS 2326-502 (0.5 on Apr. 22).



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:

- D. Donato (donato[at]milkyway.gsfc.nasa.gov) for generic information related to this week

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




Fermi LAT weekly report N. 201



Covered period: 2012.April.09 - 2012.April.16

LAT Mission week: 201.57 - 202.57





  • BL Lacertae quite active during the week reaching a daily flux of 2.3x10-6 on April 9th. See ATel #4028. It was also detected on April 14th and 15th with a flux of ~1.4x10-6.


  • PKS 1510-089 and S5 0716+71 continue to be detected most of the week reaching the the daily flux of 1x10-6 and 0.310-6 respectively.

  • Mrk 421 detected on 11th, 12th and 14th April reaching a daily flux of 0.2x10-6.


  • B3 1708+433, PKS 0454-234, PMN J2250-2806, PKS 0426--380, PKS 1424-41 and B2 1520+31 detected in more than one day of the week with a flux below 1x10-6


  • S5 1803+78, PKS 1346-112, S4 0218+35, PKS 1954--388 , PKS B1339--206 and B3 1343+451 detected in just one day of the week with a flux below 1x10-6



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:

- S. Cutini (sara.cutini[at]asdc.asi.it) for generic information related to this week

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




Saturday, April 14, 2012

Fermi LAT weekly report N. 200



Covered period: 2012.April.02 - 2012.April.08

LAT Mission week: 200.57 - 201.57





  • A new transient gamma-ray source near the Galactic plane (b = -8.1 deg) was detected on April 7, 2012 with a daily flux of (1.0±0.3)x10-6. On April 8, 2012 the source reached a daily flux of (1.6±0.3)x10-6. Based on one week of Fermi LAT monitoring data the origin of this gamma-ray source was localized to RA,Dec: 17h17m14.64s, -51h56m49.20s, with a 95% confidence error circle radius of 0.18 deg. The nearby compact radio source PMN J1717-5155 is consistent with the LAT position (ATel #4023), which is probably a gamma-ray blazar (ATel #4029).



  • BL Lacertae was detected on April 5 with a flux of (1.4±0.3)x10-6. It was also detected on April 2nd and 7th with a flux of ~0.6x10-6.


  • PKS 1510-089 was detected with a flux of (1.5±0.5)x10-6 and (1.2±0.4)x10-6 on April 4th and 8th, respectively.


  • PKS 1424-413 was detected with a flux of (1.2±0.3)x10-6 on April 6th
  • .

  • Sporadic activity (fluxes below 1x10-6): PKS 2326-502 (April 5-6), PKS 0426-380 (April 6-8), PKS 0537-441 & PKS 2255-282 (April 4), PKS 0716+714 (April 2), B2 1520+31, PKS 2155-304, and Mrk 421 (all April 3 and 6)



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:

For questions and comments please contact:
- F. Schinzel (fsch[at]unm.edu) for generic information related to this week

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




Monday, April 2, 2012

Fermi LAT weekly report N. 199



Covered period: 2012.Mar.26 - 2012.Apr.01

LAT Mission week: 199.57 - 200.57





  • BL Lacertae detected in high gamma-ray activity on March 30 and April 1, with a daily flux of (1.4+/-0.3)x10-6 and (0.7+/-0.2)x10-6, respectively.


  • PKS 0454-234 detected on March 26, 27, 28, 30, and 31, with a daily flux between (0.5+/-0.2)x10-6 and (0.8+/-0.2)x10-6.


  • Mrk 421 detected on March 26, 29, 31, and April 1 with a daily flux between 0.1x10-6 and 0.3x10-6.


  • Sporadic activity (fluxes below 1x10-6): PMN J0531-4827 (March 26), PKS 1244-255 (March 26 and 28), B2 1520+31 (March 27 and 29), PKS 0426-380 (March 28), PKS 2052-47 (March 30).



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:

For questions and comments please contact:
- F. D'Ammando (filippo.dammando[at]pg.infn.it) for generic information related to this week

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