Saturday, January 30, 2010

Extra Note - Jan. 29, 2010



PKS 0521-36 on Jan. 29th, 2010




PKS 0521-36 (1H 0515-363, 3EG J0530-3626, RX J0522.9-3627, ESO 362-21, 1FGL J0522.8-3632), a gamma-ray source with redshift z=0.055 and uncertain classification (BL Lac object, FSRQ, Seyfert-1, FRII radio morphology depending on catalogs/papers) optically bright with resolved host galaxy, optical spectra showing emission and absorption lines similar to Seyfert 1 spectra, and knotty radio-jet, showed a preliminary daily flux above 100 MeV of about 0.7 ± 0.2 E-6 photons/cm^2/s, and photon index approx 2.0 ± 0.2 (errors statistical only). This source is clearly detected on 1-day timescale on January 29, 2010 (a couple of detections are reported last August 2009). PKS 0521-36 is a nearby blazar with possible interesting features and of possible interest for TeV Cherenkov telescopes.


For questions and comments please contact the Flare Advocate on shift (S. Ciprini (stefano.ciprini[at]pg.infn.it).





Thursday, January 28, 2010

Fermi LAT weekly report N. 84



Covered period: 2010.Jan.11 - 2010.Jan.17

LAT Mission week: 84.57 - 85.57





  • S5 1803+784 was bright at the beginning of this week (Flux= 0.9E-6). An Atel (ATel#2386) was issued.

  • PKS 0426-380 detected most of the days (daily flux above 0.5E-6).

  • PKS 1510-089 is active (daily flux above 1E-6 in most days of the week).

  • Very bright 3C 454.3 also this week (weekly averaged flux level around 3.E-6).

  • 3C66A is detected in two (not consecutive) days of the week.

  • Sporadic activity from PKS 0805-07 , 4C +38.41 , Mrk 421 and 4C 21.35 has been observed.



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



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:

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

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




Tuesday, January 26, 2010

Extra note - Jan. 26, 2010



About the source reported in AGILE's ATel#2403


In ATel #2403 a possible AGILE detection of a new gamma-ray source (AGL J2206+6203) is announced. For the sky position and time interval reported in this ATel preliminary checks and analysis find no detection above 100 MeV by Fermi LAT. No hint of a signal in the 0.1-1 GeV energy band is found (TS=0), as well as no photon-count excess visible in the counts map region around the specified coordinates. Further analysis is ongoing.


For questions and comments you can contact the Flare Advocate on shift (S. Ciprini (stefano.ciprini[at]pg.infn.it) ), and both E. Hays (elizabeth.a.hays[at]nasa.gov) and A. Hill (Adam.Hill[at]obs.ujf-grenoble.fr).



Tuesday, January 5, 2010

Fermi LAT weekly report N.79



Covered period: 2009.Dec.7 - 2009.Dec.12

LAT Mission week: 79.57 - 80.57





  • 3C353.4 still flaring, decreased in the daily flux from ~16E-6 to ~8E-6 over the course of the week.

  • 4C38.41 active at the beginning of the week, detected at a daily flux of 1.8E-6 on Dec 9th.

  • 3C273 slightly bright, detected on the 10th Dec at a daily run of 1.6E-6.

  • PKS 1510-08 was bright on two days, reaching a daily flux of 3E-6 on Dec 13th.

  • PKS 1222+21 was active this week reaching a flux of 1.1E-6 towards the end of the week.

  • The FSRQ TEX 0322+222 was detected at a daily flux of 1.4E-6 on Dec 8th.



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:

- A. Cannon (annacannon1984@gmail.com) for generic information related to this week

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

Monday, January 4, 2010

Fermi LAT weekly report N.81



Covered period: 2009.Dec.21 - 2009.Dec.27

LAT Mission week: 81.57 - 82.57





  • 4C 21.35 (PKS 1222+21) bright also this week (above 1E-6 in the first part of the week).

  • PKS 1510-089 is active (daily flux above 1E-6 in most days of the week).

  • Mkn 421 detected most of the days.

  • Very bright 3C 454.3 also this week (weekly averaged flux level around 3.5E-6).

  • PKS 1424-41 and PKS 0805-07 detected at the end of the week.

  • Nothing bright and significant is preliminary detected above 100 MeV at the position reported in the AGILE's ATel#2361 (l=273.1, b=16.5).



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



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]pg.infn.it) for generic information related to this week

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




Fermi LAT weekly report N.80



Covered period: 2009.Dec.14 - 2009.Dec.20

LAT Mission week: 80.57 - 81.57





  • The blazar 4C 21.35 (PKS 1222+21) showed a flare with daily flux above 3E-6 on Dec.15 (see ATel#2349).

  • PKS 1510-089 is back and increasing this week (daily flux reached about 2.7E-6 on Dec.18).

  • Mkn 421 was slightly more active being detected most of the days.

  • A enduring very bright 3C 454.3 for all the week (weekly averaged flux level around to 5E-6).

  • PKS 0537-441, and PKS 0805-07 were more active at the end of the week.



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



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]pg.infn.it) for generic information related to this week

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