Tuesday, July 24, 2012

Fermi LAT weekly report N. 215

Covered period: 2012.July.16 - 2012.July.22
LAT Mission week: 215.57 - 216.57
  • Mrk 421 detected in flaring activity on July 16 with a daily flux of (1.4±0.2) X 10-6. See ATel#4261. The source continued to be detected between July 17 and 21, with a daily flux between (0.4±0.1) X 10-6 and (0.9±0.2) X 10-6.
  • NRAO 676 detected in high gamma-ray activity on July 16, 17 and 18, with a daily flux between (0.9±0.2) X 10-6 and (1.5±0.3) X 10-6.
  • PKS B1424-418 detected on July 17, 18, 19, and 21, with a daily flux between (0.6±0.2) X 10-6 and (1.0±0.3) X 10-6.
  • PKS 2326-502 detected on July 17, 20, 21, and 22, with a daily flux between (0.8±0.2) X 10-6 and (0.9±0.2) X 10-6.
  • PKS 2233-148 detected on July 17, 18, 19, and 22, with a daily flux between (0.4±0.1) X 10-6 and (0.6±0.2) X 10-6.
  • NGC 1275 detected quite bright on July 20 and 21, with a daily flux of (0.8±0.3) X 10-6 and (0.4±0.1) X 10-6, respectively.
  • B3 1343+451 detected on July 19 and 20, with a daily flux of (0.7±0.2) X 10-6 and (0.4±0.2) X 10-6, respectively.
  • PKS 0244-470 detected on July 19 and 20, with a daily flux of (0.3±0.1) X 10-6 and (0.4±0.1) X 10-6, respectively.
  • Sporadic daily detections of blazars (fluxes below 1 X 10-6): S3 0827+24 (July 17), PKS 2131-021 (July 18), Ton 599 (July 19), S5 0716+714 (July 19), PKS 0116-219 (July 20), S5 2007+77 (July 20), OG 050 (July 21), PKS 0735+17 (July 21), PKS 2155-304 (July 21), PKS 0906+01 (July 21), PKS 2255-282 (July 21).

  • 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 (filippo.dammando[at]fisica.unipg.it) and M. Orientii (orienti[at]ira.inaf.it) for generic information related to this week
    - Contact persons on this page for individual sources cited above.

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Wednesday, July 18, 2012

Fermi LAT Weekly Report N. 214

Covered period: 2012.july.09 - 2012.July.15
LAT Mission week: 214.57 - 215.57
  • Mrk 421 detected all week with a daily flux between (0.8±0.2) X 10-6 and (0.3±0.1) X 10-6.
  • NRAO 676 detected on high state on July 9, 10, 14, and 15, with a daily flux between (2.5±0.4) X 10-6 and (1.5±0.3) X 10-6.
  • B3 1343+451 detected on July 9, 10, and 11, with a daily flux between (0.8±0.2) X 10-6 and (0.4±0.1) X 10-6.
  • PKS 1424+240 detected on July 10, 11, and 14, with a daily flux between (0.4±0.2) X 10-6 and (0.2±0.1) X 10-6.
  • S4 0218+35 detected on July 9, and 15, with a daily flux of (0.5±0.2) X 10-6 and (0.6±0.2) X 10-6, respectively.
  • S5 0716+71 detected on July 11, and 13, with a daily flux of (0.6±0.2) X 10-6 and (0.3±0.1) X 10-6, respectively.
  • Sporadic daily detections of blazars (fluxes below 1 X 10-6 ): PKS 2345-16 (July 10), CTA 102 (July 10), PKS 0537-441 (July 11), PKS 2131-021 (July 13), PKS 0244-470 (July 14), OG 050 (July 14), PKS B1424-418 (July 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:
    - M. Orienti (orienti[at]ira.inaf.it) and M. Giroletti (giroletti[at]ira.inaf.it) for generic information related to this week
    - Contact persons on this page for individual sources cited above.

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Monday, July 16, 2012

Fermi LAT Weekly Report N. 213

Covered period: 2012.Jul.02-2012.Jul.08
LAT Mission week: 213.57-214.57
  • On July 3 the Crab nebula region reached a daily average flux level of (5.5±0.7) X 10-6 which is twice its average level. This triggered TOO observations lasting 300 ks (elapsed time) and was reported in ATel#4239. After staying at elevated daily levels and showing considerable variations on shorter time scales, the daily flux dropped back to an average level on July 7.
  • NRAO 676 was very bright all week and reached a record daily average flux level of (4.5±0.4) X 10-6 on July 4th. The discovery of this source was communicated to the community last month (ATel#4182) when its daily average flux reached (2.3±0.3) X 10-6 on 2012 June 16.
  • S5 0716+714 was detected on all except one day from July 3 through July 8 with daily average flux in the range (0.6-0.9) X 10-6.
  • PKS 2326-502 was detected on July 2, July 3 and again on July 8 with daily average flux in the range (0.6-1.1) X 10-6.
  • Sporadic activity (fluxes below 1e-6): BL Lacertae, PKS 1510-08, PKS 2255-282, 4C +28.07, Mrk 421, PKS 0906+01, NGC 1275, 4C +55.17, MG2 J043337+2905, OG 050, TXS 0141+268, S4 0218+35, PKS 0804-05, 4C +38.41.

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:
- Roopesh Ojha (Roopesh.Ojha[at]gmail.com) for generic information related to this week
- Contact persons on this page for individual sources cited above.

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Wednesday, July 4, 2012

Fermi LAT weekly report N. 212

Covered period: 2012.Jun.25-2012.Jul.01
LAT Mission week: 212.57-213.57
  • PKS 2326-502 was detected on daily time scale starting from June 26 with fluxes between (0.8+/-0.3)e-6 and (2.2+/-0.3)e-6. An ATel was issued (ATel#4225) on the renewed gamma-ray activity of this source.
  • S5 0716+714 was detected on June 25, 26 and 29 with daily fluxes of (0.4+/-0.1)e-6, (0.5+/-0.1)e-6 and (0.6+/-0.1)e-6, respectively.
  • Mkn 421 was detected on June 25, 30 and July 1 with a daily flux of (0.3+/-0.1)e-6.
  • PMN J2345-1555 was detected on June 28 and 29 with daily fluxes of (0.3+/-0.2)e-6 and (0.5+/-0.2)e-6, respectively.
  • A new gamma-ray source in the vicinity of NRAO 676 was detected on June 26 with a daily flux of (2.5+/-0.3)e-6.
  • Sporadic activity (fluxes below 1e-6): NGC 1275 (June 25), B3 1343+451 (June 25), 4C +21.35 (June 25), BL Lac (June 26), PKS B1424-418 (June 27), PKS 0537-441 (June 28).

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 (filippo.dammando[at]fisica.unipg.it) and E. Torresi (torresi[at]iasfbo.inaf.it) for generic information related to this week
- Contact persons on this page for individual sources cited above.

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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.



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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.

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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.

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