Friday, June 29, 2012

Fermi LAT Weekly Report N. 211



Covered period: 2012.Jun.18 - 2012.Jun.25

LAT Mission week: 211.57 - 212.57







  • PKS 2233-148 was detected four times with daily fluxes ranging from (1.2±0.3) X 10-6 to (3.2±0.4) X 10-6, reaching the peak value on Jun. 20.

  • PKS 0906+01 was detected on Jun. 18 with a daily flux of (1.2±0.3) X 10-6.

  • Sporadic activity (fluxes below 1 X 10-6): PKS 1424-41 (5), PKS 1954-388 (2), S5 0716+71 (2), Mkn 421 (2), CTA 102, PKS 1244-255, PKS 1510-08, PKS 2142-75.



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:

- T. Venters (toni.venters[at]gmail.com) and 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.




Tuesday, June 26, 2012

Fermi LAT weekly report N. 210


Covered period: 2012 June 11-17
LAT Mission week: 210.57 - 211.57

  • New LAT source detected clearly at least from June 14 and preliminary associated to the candidate blazar NRAO 676 (aka TXS 2159+505, a possible FSRQ placed at z=1.899). The source was detected in flaring state on June 16 with daily flux of (2.3 ± 0.3)E-6 (see ATel#4182).
  • The gamma-ray flaring activity of the BL Lac object PKS 2233-148 (see ATel#4152) continued and increased during this week. On June 13 the source reached a daily averaged flux level of about 2.8E-6 (almost 40 times the averaged flux over the first 2 years of survey).
  • The gravitationally lensed blazar PKS 1830-211 (see ATel#4158) continued to be in high state being detected at a level above 1E-6 most days of the week. The source reached a flux level of about 3E-6 on June 13.
  • Gamma-ray flaring activity of blazar OJ 287 detected at a level of about 1E-6 on June 17.
  • Solar Flare detected by the LAT in a 6h interval of June 14 (6h-bin averaged flux = 8E-6). This detection is spatially and temporally consistent with the M1.9 solar flare event that occurred the same day.
  • Blazars PKS 1510-08, B2 1520+31, B3 1343+451, CTA 102, PKS 1424-41, PKS 2233-148, PMN J2345-1555, 4C +04.42, detected in some days of the week in bright state (above about the flux level of 0.5E-6).
  • Sporadic daily detections of blazars, with a daily flux level below about 0.5E-6: 3C 66A, 4C +28.07, S5 0716+714, Mkn 421, PKS 2155-304, PKS 2326-502.

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

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.


Fermi LAT weekly report N. 209


Covered period: 2012 June 4-10
LAT Mission week: 209.57 - 210.57

  • Gamma-ray flaring activity of the BL Lac object PKS 2233–148 (z>0.65). The averaged daily flux level detected on June the 5th was (1.5±0.2)E-6 (see ATEL#4152). PKS 2233–148 was active and bright all the days of the week (daily flux level always above about 0.7E-6).
  • The gravitationally lensed blazar PKS 1830-211 showed renewed gamma-ray flaring activity with a daily flux level above 1E-6 in every
    day of the week. On June the 6th, in particular, the source reached a daily averaged flux level of (2.2±0.2)E-6 (see ATel#4158).
  • Gamma-ray flare of BL Lacertae, peaking on June the 5th (averaged daily flux level of (2.1±0.3)E-6). The source was detected in high state
    most days of the week.
  • The Narrow line Seyfert 1 object PMN J0948+0022 showed a flare on June the 9th (daily averaged flux around 1E-6).
  • Blazars PMN J2345–1555, PKS 0454–234, CTA 102, 4C +38.41 (S4 1633+38), B3 1343+451, S5 0716+71, Ton 599, PKS 1903-80 were detected in some days of the week in bright state (above about the flux level of 0.5E-6).
  • Sporadic daily detections of blazars, with a flux level below about 0.5E-6): B3 1343+451, PMN J2345–1555, PKS 2255–282, OG 50, PKS 1424-41, Mkn 421, Mkn 501, B3 1708+433.

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

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.


Sunday, June 10, 2012

Fermi LAT weekly report N. 208


Covered period: 2012.May.28 - 2012.Jun.03
LAT Mission week: 208.57 - 209.57

  • A solar flare was detected by LAT on Jun 3 with a daily flux level of (5.0+/- 0.6) X 10-6. Goes detected a M3.3 class flare around 18:00 UTC in agreement with the third six-hour time interval of the day.
  • S5 0716+71 was detected on May 28 and then every day from May 31 through Jun 3 with daily flux in the range (0.4-0.7) +/- 0.1 X 10-6.
  • Mrk 421 was detected on May 28 and then every day from May 31 through Jun 3 with daily flux in the range (0.2-0.3) +/- 0.1 X 10-6).
  • CTA 102 was detected on May 28 and Jun 1 with a daily flux of 0.8 +/- 0.2 X 10-6 on both days. Increased optical activity in this source was observed this week by the ATOM telescope (ATel #4141).
  • B3 1343+451 was detected from May 31 through Jun 2 brightening from 0.3 to 0.8 X 10-6).
  • PMN J2345-1555 was detected on May 29, and then Jun 1 through Jun 3 with with daily flux in the range (0.3-0.7) +/- 0.1 X 10-6).
  • PKS 2233-148 was detected on May 29, Jun 2 and Jun 3 brightening from 0.4 to 0.9 X 10-6).
  • Sporadic daily detections of blazars (flux below 1 X 10-6 ) NGC 1275, PKS 2255-282.

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.


Tuesday, June 5, 2012

Fermi LAT weekly report N. 207



Covered period: 2012.May.21 - 2012.May.27
LAT Mission week: 206.57 - 207.57

  • CTA 102 continues to be detected most of the week reaching a daily flux of 1.5x10-6 on May 22nd.
  • S5 0716+71 is detected most of the week with a flux below 1x10-6
  • Mkn 421 is detected most of the week with a flux below 1x10-6.
  • PKS 1830-211 is detected on the second half of the week with a flux below 1x10-6.
  • SBS 0846+513 is detected on May 24th with a daily flux of 0.5x10-6.
  • BL Lacertae, PKS 0537-441, B2 1520+31, AO 0235+164, PKS 2326-502, OJ 287, PKS 2155-304, PKS B1310–041, Ton 599, PKS 2142-75, B3 1343+451, PKS 2233–148 and PKS 0341-256 are sporadic 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:
- D. Gasparrini (dario.gasparrini[at]asdc.asi.it) for generic information related to this week - Contact persons on this page for individual sources cited above.