Fermi LAT weekly report N. 101

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Covered period: 2010.May.10 - 2010.May.16

LAT Mission week: 101.57 - 102.57

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• Blazars PKS 1424-41, 4C 21.35 (also known as PKS 1222+21), 3C 454.3 very bright (daily flux above 2E-6 during most of the week).


• For the first time from the launch of Fermi, the LAT source 1FGL J1033.8+6048 (associated to two FSRQ sources, S4 1030+61, a.k.a. TXS 1030+611, z=1.4009, and GB6 J1032+6051, z=1.064) flared above the 1E-6threshold. ATel#2622 published. Follow up by ground-based telescopes and Swift confirm the identification with S4 1030+61 (related following ATels). Weekly averaged flux is about 0.5E-6.


• PKS 0537-441 dimmed during the week.


• PKS 0301-243 reached the daily flux threshold of 1E-6 on May 11. Weekly averaged flux is about 0.3E-6.


• BL Lac relatively bright (in particular reached a daily flux around 0.7E-6 on May 11, and weekly averaged flux about 0.26E-6), as well as Mkn 421 (weekly averaged flux about 0.1E-6).


• Sporadic daily detections of blazars OP 313, 3C 273, PKS 0426-380, and PKS 2155-304.


• Other blazars detected on weekly timescale, among others, are 3C 66A, NGC 1275, PMN J0850-1213, PKS 2227-08, B2 1520+31, PKS 0332-403.

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.

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Fermi LAT weekly report N. 100

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Covered period: 2010.May.3 - 2010.May.9

LAT Mission week: 100.57 - 101.57

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• 4C+21.35 still active, detected all week with an average daily flux of 2.1x10^-6 ph cm-2 s-1, rising towards the end of the week peaking on the 8th May at a flux of (3.2+/-0.4)x10^-6 p cm-2 s-1.
  

• 3C454.3 was very bright, detected every day this week, peaking on the 7th May at a flux of (8.9+/-0.8)x10^-6 ph cm-2 s-1.
  

• PKS 0537-441 continued its activity from last week with an average daily flux of 0.7x10^-6 ph cm-2 s-1. It was detected every day this week.
  

• PKS 0301-243 continued its activity from last week and was detected up until 6th May with an average daily flux = 0.5x10^-6 ph cm-2 s-1.
  

• PKS 0426-380 detected for four days this week, 6th-9th May, an average daily flux of ~0.5x10^-6 ph cm-2 s-1.
  

• PKS 1424-41 detected for five days this week, 5th-9th May, with an average daily flux of ~1.3x10^-6 ph cm-2 s-1.
  

• CRABS J1033+6051 was detected in the middle of the week, 4th-7th May, with an average daily flux of ~0.5x10^-6 ph cm-2 s-1.
  

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. B. Hill (adam.hill@obs.ujf-grenoble.fr) for generic information related to this week

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

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Fermi LAT weekly report N. 99

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Covered period: 2010.Apr.26 - 2010.May.2

LAT Mission week: 99.57 - 100.57

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• 4C+21.35 still very bright, detected all week with an average daily flux of 4.3x10^-6 ph cm-2 s-1, peaking on the 30th April at a flux of (13.1+/-0.7)x10^-6 ph cm-2 s-1.


• 3C454.3 remained bright, detected every day this week, fluctuating in daily flux between (2.9+/-0.5)x10^-6 ph cm-2 s-1 and (5.7+/-0.6)x10^-6 ph cm-2 s-1.


• PKS 0537-441 (27th April, daily flux = (1.2+/-0.2)x10^-6 ph cm-2 s-1) and PKS 0301-243 (28th April, daily flux = (1.4+/-0.3) x10^-6 ph cm-2 s-1) exhibited an increase in gamma- ray activity , (see ATel#2591). Both sources detected throughout week.


• PKS 0426-380 detected on most days this week, at a relatively steady daily flux of ~0.6x10^-6 ph cm-2 s-1.



• Mrk421 detected on four days this week with an average daily flux of ~0.3x10^-6 ph cm-2 s-1.


• Sporacid activity from CGRaBS J0850-1213, CGRaBS J1033+6051, PKS 0727-11, PKS 1510-08, PKS 1424-41 and B2 0954+25A

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.

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Fermi LAT weekly report N. 98

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

LAT Mission week: 98.57 - 99.57

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• PKS 0426-380 detected on 5 days this week with a daily flux above 0.5 +/- 0.2 X 10-6 (peak on Apr 22, with a daily flux (0.9 +/- 0.3) X 10-6).


• PKS 0537-441 detected all week long with daily flux approaching and around (1 +/- 0.2) X 10-6.


• S5 0716+714 detected on Apr. 19 and 22 with daily fluxes around (0.5 +/- 0.2) X 10-6.


• CGRaBS J0850-1213 was detected on Apr. 19, 24, and 25 with daily fluxes not exceeding (0.8 +/- 0.2) X 10-6.


• 4C +21.35 has been detected all week long in a high state with daily fluxes above (1.5 +/- 0.2) X 10-6. A peak in intensity has been observed on Apr. 24, when the daily flux was (8.1 +/- 0.7) X 10-6 (see ATel#2584).


• PKS 1424-41 has reached daily fluxes around (1.0 +/- 0.2) X 10-6 on Apr. 21 and 22 (see ATel#2583).


• PKS 2233-148 was detected on Apr. 19 and 23 with daily fluxes around (0.7 +/- 0.3) X 10-6.


• 3C 454.3 still bright through the week but with daily flux fading from (9.5 +/- 0.8) X 10-6 to (3.4 +/- 0.5) X 10-6.


• PKS 0906+01, HB89 1738+499, PKS 0301-243, PKS 0805-07, MRk 421, CGRaBS J1033+6051, and CGRaBS J1739+4955 were detected in one day of the week (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.

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Fermi LAT weekly report N. 97

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

LAT Mission week: 97.57 - 98.57

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• 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.
  

  
  

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Fermi LAT weekly report N. 96

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

LAT Mission week: 96.57 - 97.57

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• 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.

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Extra note - Apr. 15, 2010

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About source reported in ATel#2552

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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)

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