Thursday, December 29, 2011

Fermi LAT weekly report N. 185

Fermi LAT weekly report N. 185






Covered period: 2011 December 19-25
LAT Mission week: 185.57 - 186.57




  • Renewed flaring activity from blazar 4C +71.07 (S5 0836+71). This MeV-peaked FSRQs reached a flux level of about 1.7E-6 (3E-6 in a 6h time bin) on December 25 with soft photon index (see ATel#3831). This source has been active in gamma-rays for several weeks.

  • BL Lac showed a flare on December 22 (flux about 1.6E-6, soft photon index).

  • Other bright blazars reaching the flux level of 1E-6 in some days of the week are: 4C +28.07, PKS 0454-234, PKS 1424-41, PKS 1510-08.

  • Other blazars detected most days of the week (below 1E-6) are: PKS 2345-16, PKS 2326-502, B2 1520+31, Mkn 421, Mkn 501.

  • Other blazars sporadically detected during the week (below 1E-6) are: NGC 1275, B3 1343+451, PKS 0402-362, PKS 0537-441, PKS 0524-485, 4C +55.17, PMN J0533-4632, S5 0716+714, PKS 2155-304, 3C 66A, 3C 279



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]asdc.asi.it) for generic information related to this week
- Contact persons on this page for individual sources cited above.



Thursday, December 22, 2011

Fermi LAT weekly report N. 184



Covered period: 2011.Dec.12 - 2011.Dec.18

LAT Mission week: 184.57 - 185.57






  • PKS 2123-463 detected in flaring activity on December 14, with a daily flux of (1.1+/-0.2)e-6 (Atel #3808). Swift follow-up observations of PKS 2123-463 confirmed the increase of activity also in UV and X-ray bands (Atel #3815).

  • PKS 0454-234 detected all week, with a daily flux between (0.5+/-0.1)e-6 and (1.1+/-0.2)e-6.

  • PKS 1510-08 detected in high state on December 18 with a daily flux of (1.9+/-0.5)e-6.

  • PKS 1343+451 detected all week, except December 13, with a daily flux between (0.4+/-0.2)e-6 and (0.8+/-0.2)e-6.

  • 4C +28.07 detected on December 14, 16 and 17, with a daily flux between (0.6+/-0.2)e-6 and (0.9+/-0.3)e-6.

  • B2 1520+31 detected on December 12, 15, and 18, with a daily flux between (0.4+/-0.2)e-6 and (0.5+/-0.2)e-6.

  • Sporadic daily detections of blazars: S5 0716+714 (Dec 12 and 18), PKS 2326-502 (Dec 12 and 14), PKS 1424-41 (Dec 13 and 14), PMN J2250-2806 (Dec 14), TXS 0059+581 (Dec 16), PMN J2345-1555 (Dec 17), PKS 2345-16 (Dec 18).




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:

- M. Orienti (orienti[at]ira.inaf.it) for generic information related to this week

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





Friday, December 16, 2011



Covered period: 2011.Dec.5 - 2011.Dec.11

LAT Mission week: 183.57 - 184.57





  • PKS 0454-234 detected in a flaring activity with a high significance detection every day, with daily flux between (0.6+/-0.1)x10-6 and (1.1+/-0.2)x10-6.

  • B3 1343+451 detected every day in a high state, with daily flux between (0.6+/-0.2)x10-6 and (1.0+/-0.2)x10-6.

  • BL Lac detected every day except on Dec. 8 with a particularly
    high flux of (1.3+/-0.2)x10-6 on Dec. 11.

  • PKS 2326-502 detected on Dec. 5, 8 and 11 with daily flux
    between (0.4+/-0.1)x10-6 and (0.7+/-0.2)x10-6.

  • 4C +28.07 detected on Dec. 5, 6, 8 and 9 with daily flux
    between (0.6+/-0.2)x10-6 and (0.9+/-0.3)x10-6.

  • PKS 1424-41 detected in a high state on Dec. 11 with daily
    flux of (0.9+/-0.2)x10-6.

  • PMN J2345-1555, almost detected on Dec. 5 with TS=24.4,
    appeared as a significant detection on Dec. 7 and 9 with flux
    below 0.5x10-6.

  • 4C +71.07 popped up at the very beginning of the week on Dec.
    5 with a daily flux of (0.9+/-0.2)10-6.

  • TXS 0059+581 detected on Dec. 6 with a daily flux of (0.7+/-0.2)x10-6.

  • B2 1520+31 and PKS 0716+714 detected twice this week,
    respectively on Dec. 8 and 11 (with daily flux of (0.8+/-0.2)x10-6 and (0.5+/-0.2)x10-6) and on Dec. 10 and 11 (with daily flux of (0.3+/-0.1)x10-6 and (0.6+/-0.2)x10-6).

  • Markarian 501 almost detected on Dec. 10 with TS=24.7 and a
    daily flux of (0.4+/-0.2)x10-6.

  • Sporadic detections of blazars : ASP J134421+451449 on Dec. 8
    with daily flux of (0.6+/-0.2)x10-6, ASP J133838+450232 on
    Dec. 11 with daily flux of (0.8+/-0.2)x10-6, S5 0836+71 on Dec. 5 with daily flux of (0.9+/-0.2)x10-6.


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:

- L. Escande (escande[at]cenbg.in2p3.fr) for generic information related to this week

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




Wednesday, December 14, 2011

Fermi LAT weekly report N.182



Covered period: 2011.Nov.28 - 2011.Dec.04

LAT Mission week: 182.57 - 183.57





  • B3 1343+451 was detected every day. It flared up to a daily flux of (1.2 ± 0.2) x 10-6 (on Nov 29th) before declining to (0.4 ± 0.2) x 10-6. This was the highest gamma-ray flux level detected from this very high redshift (z=2.534) FSRQ and was reported in ATel #3793. This source has been intermittently detected since early October and had a steadily rising daily-averaged flux from the preceding week.

  • PKS0454-234 was detected every day except Nov 29th with daily-averaged fluxes between (0.4 ± 0.2) x 10-6 and (1.7 ± 0.2) x 10-6.

  • B2 1520+31 detected on Nov 28th, Nov 30th, Dec 1st through 3rd with daily flux declining from (1.2 ± 0.2) x 10-6 to (0.4 ± 0.2) x 10-6.

  • 4C +28.07 was detected every day starting from Nov 28th reaching a peak daily-averaged flux of (1.0 ± 0.2) x 10-6 on Dec 3rd.

  • PKS1244-255, PKS 0537-441, 4C71.07, Mrk 421, J2345-1555, BL Lac, PKS1424-41, PKS2320-005, TXS0059+581, NGC 1275 (3C84), OJ287 detected in one or two days 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:

- R. Ojha (roopesh.ojha[at]gmail.com) for generic information related to this week

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