Friday, July 30, 2010

Extra Note - July 30, 2010



Non-detection of AGL J2241+4454


In ATel #2761, the AGILE team reported the detection of a possible new gamma-ray point source (AGL J2241+4454) at R.A.,Dec. = 340.3, 44.9 (J2000). Preliminary analysis of LAT data for the same direction and time period shows no significant detection above 100 MeV. Assuming a power law spectrum with photon index 2, we place an upper limit on the integral flux above 100 MeV of 1.0 x 10-7 ph cm-2 s-1, at 95% confidence. For a softer source (index=3), the limit shifts up to 3.0 x 10-7.


For questions and comments, please contact the flare advocate on shift (wallacee[at]uw.edu).

Thursday, July 29, 2010

Fermi LAT weekly report N. 110



Covered period: 2010.Jul.19 - 2010.Jul.25

LAT Mission week: 111.57 - 112.57





  • NGC 1275 (Perseua A) was detected on 3 days this week- 20th, 21st and 24th. The flux seen on the 24th is similiar to that menioned in the ATel #2737.


  • 3C454.3 was bright again, being detected most days this week with an average daily flux of 2.2x10-6.


  • PKS 1510-08 was also relatively bright, detected thoughout the week at an average daily flux of 1.1x10-6.


  • Both 4C14.23 and 4C21.35 ere detected in the first half of the week with average daily fluxes of 0.5x10-6 and 1.4x10-6, respectively.


  • The BL Lac 3C66A was detected on the 20th and 23rd (flux below 0.6x10-6.


  • PKS 0537-441 was detected on the 21st at a flux of 0.2x10-6 and S5 0716+71 on the 23rd at a flux of 0.2x10-6.






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:

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

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




Wednesday, July 21, 2010

Fermi LAT weekly report N. 109



Covered period: 2010.Jul.12 - 2010.Jul.18

LAT Mission week: 110.57 - 111.57





  • BL Lac 3C 66A is detected on Jul. 15, 16, and 18 (flux below 0.5 X 10-6).

  • NGC 1275 (Perseus A) is detected most of the week (flux below 0.7 X 10-6). The first day of activity, corresponding to the highest flux level, was July 13 and an ATel was posted (ATel#2737).

  • PKS 0537-441 is detected most days this week, with daily flux below 0.9 X 10-6.

  • S5 0716+71 is detected on Jul. 14 and 16 (flux below 0.4 X 10-6).

  • 4C+14.23 is detected on Jul. 15 and 16 (flux below 0.6 X 10-6).

  • 4C 21.35 and 3C 454.3 were relatively bright during all week, with daily flux below 2.7 X 10-6 and 3.3 X 10-6, respectively. 4C 21.35 showed some sign of fading in the last part of the week, with flux dropping below 1.0 X 10-6.

  • PKS 1424-41 is detected on Jul. 12 and 15 (flux below 0.6 X 10-6).

  • B2 1520+31 is detected on Jul. 13, 15, and 17 (flux below 1.0 X 10-6).

  • PKS 0426-380 (12), PKS 0524-485 (13), CGRaBS J1312+4828 (13), PKS 1510-08 (13), B2 0716+33 (16) and PKS 0521-36 (17) are detected (flux below 1 X 10-6 ). In parenthesis the day of detection is indicated.



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:

- 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.




Monday, July 12, 2010

Fermi LAT weekly report N. 108



Covered period: 2010.Jul.5 - 2010.Jul.11

LAT Mission week: 109.57 - 110.57





  • BL Lac 3C 66A is detected on Jul. 6 and 11 (flux below 0.5 X 10-6).

  • PKS 0426-380 is detected most days this week, with daily flux below 0.7 X 10-6).

  • PKS 0537-441 is detected on Jul. 7 and 8 (flux below 0.6 X 10-6).

  • Mkn 421 is detected on Jul. 9 and 11 (flux below 0.4 X 10-6).

  • 4C 21.35 and 3C 454.3 were relatively bright during all week, with daily flux below 2.4 X 10-6.

  • PKS 1329-049, a blazar at z=2.15, is detected on Jul. 6 and 7. In the second day the flux reached the 1.0 +/- 0.3 X 10-6 threshold and an ATel was posted (ATel#2728).

  • The radio-loud narrow line Sy 1 galaxy PMN J0948+0022 is detected on Jul. 9 with flux at 1.3 +/- 0.4 X 10-6 and an ATel was posted (ATel#2733).

  • PKS 1424+240 and 4C+14.23 are detected on Jul. 4 and 11, respectively (flux below 1 X 10-6 ).



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:

- 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.




Thursday, July 8, 2010

Fermi LAT weekly report N. 107



Covered period: 2010.June.28 - 2010.July.4
LAT Mission week: 108.57 - 109.57





  • The NLSy1 CGRaBS J0948+0022 (PMN J0948+0022) detected with daily flux of (0.5 +/- 0.3)E-6 on June 28th.


  • The blazar 4C 21.35 (also known as PKS 1222+21 and PKS B1222+216) very bright during all the week, with daily flux between 2.5E-6 and 6.5E-6 (on June 30th).


  • PKS 0521-364 detected on three consecutive days this week (June 29th - July 1st), with a peak daily flux of (1.4 +/- 0.2)E-6 on June 30th.


  • PKS 0426-380 detected most days this week, with daily flux between 0.5E-6 and 1.0E-6.


  • PKS 0537-441 detected on four days this week, with daily flux between
    0.4E-6 and 0.6E-6.


  • 0716+71 detected on four days this week, with daily flux at about 0.5E-6.


  • 3C 454.3 bright for most of the week with daily flux above 1.5E-6.


  • 4C 29.45 detected on June 28th and 30th, with daily flux of about 0.4E-6.


  • Sporadic daily detections of blazars 3C 66A (June 28th), B3 0917+449 (June 28th), PKS 2155-304 (July 3rd), and 4C 47.44 (July 3rd).



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:
- F. D'Ammando (dammando[at]ifc.inaf.it) for generic information related to this week
- Contact persons on this page for individual sources cited above.



Sunday, July 4, 2010

Fermi LAT weekly report N. 106



Covered period: 2010.Jun.14 - 2010.Jun.20

LAT Mission week: 106.57 - 107.57






  • PKS 0521-36 was detected for the first time in a daily time scale with
    a flux above the threshold of (1.0 ± 0.2) X 10-6 in June 17, an Atel was
    issued about the flaring activity of this source (see ATel #2683).
    A Swift ToO was obtained (see ATel #2689).


  • 4C +21.35 (June 18, see ATel #2687): Fermi/LAT has observed an increasing
    gamma-ray flux from a source positionally consistent with 4C +21.35 (also known as PKS 1222+21 and PKS B1222+216) at z=0.43. On June 18,
    2010 this blazar showed a bright flare with a daily flux (E>100MeV) of (12.46 ± 0.79) X 10-6. A peak flux (E>100MeV)
    of (16.42 ± 1.89) X 10-6 was reached between 12:00 and 17:01 UT.

    The same flare has been detected also by the AGILE (see ATel #2686) and MAGIC (see ATel #2684) telescopes, a SWIFT follow up has been obtained (see ATel #2698).


  • 3C 454.3 was detected all the week.


  • CGRaBS J1033+6051 was detected above the threshold in the daily time scale on June 15.




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:

- G. Iafrate (iafrate[at]oats.inaf.it) F. Longo (longo[at]ts.infn.it) for generic information related to this week

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





Thursday, July 1, 2010

Extra Note - July 1, 2010



About source reported in ATel #2703





Following the announcement of a NIR flaring activity of the
QSO CGRaBS J1700+6830 on June 12th,
observed with the CANICA NIR camera on the 2.1m telescope
at the Observatorio Astrofísico Guillermo Haro, located in Cananea,
Mexico, the LAT team announces that on same day (2010-06-12)
the source was in outburst reaching a flux (E>100MeV) of (0.9+/-0.2) x 10^-6 ph cm^-2 s^-1, more than 10 times the 1FGL catalog flux (Abdo, A. et al 2010, ApJ, 715, 429).
This source was detected for the first time from Fermi in the daily time scale
on 2009-03-22 (Atel #1986) in a high state with a gamma-ray flux (E>100MeV)
of (1.0+/-0.2) x 10^-6 ph cm^-2 s^-1.

For questions and comments please contact the Flare Advocate on shift (sara.cutini[at]asdc.asi.it)