Monday, September 30, 2013

Fermi LAT Weekly Report N. 276

Covered period: 2013.Sep.16 - 2013.Sep.22
LAT Mission week: 276.57 - 277.57
  • PKS 1510-089 dominated the gamma-ray sky this week with daily fluxes in the range (1.5 - 6.4).  A Swift ToO was triggered and the observed fluxes indicate that this blazar was also flaring in the X-ray band (see http://www.swift.psu.edu/monitoring/source.php?source=PKS1510-089 for more information). We thank the Swift team for their support.
  • 3C 454.3, 4C +38.41 and PKS 0454-234 also deserve notable mention, with recurrent daily detections and fluxes above 1.
  • Other sources detected several days of the week (with fluxes below 1): Mkn 421, 3C 279, PKS 0426-380, NGC 1275, PKS 2326-502
  • Sporadic activity (detected only one or two days,  fluxes below 1): 4C +21.35, PKS 1424-418, PKS 0250-225, PKS 2155-304 , CTA 102,  4C +55.17.

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. Reyes (lreyes04[at]calpoly.edu) for generic information related to this week

- Contact persons on this page for individual sources cited above.
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Monday, September 23, 2013

Fermi LAT Weekly Report N. 275

Covered period: 2013.Sep.09 - 2013.Sep.15
LAT Mission week: 275.57 - 276.57
  • A bright flare has been detected from 4C +01.02  on 2013 September 14 and reported in ATel #5394.
  • 4C +38.41 observed most days of the week with a daily flux above 1.
  • PKS 1510–08 has been strongly detected all week reaching a peak daily average flux of (2.1 +/- 0.6) on September 12.
  • Sources detected most days of the week with a daily average flux 
  • between 0.2 and 1.2 are: PKS 0454-234, NGC 1275, PKS 2326–502, Mkn 421.
  • PKS 1424–418, S4 1144+40, PKS 1222+216, PKS 0426-380.
  • Sporadic activity observed from the blazars NRAO 190, 3C 454.3, B3 1343+451, B3 0227+403 and PKS 1424+240.
Fluxes are in the unit of 10-6 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:

- S. Buson (buson[at]pd.infn.it) for generic information related to this week

- Contact persons on this page for individual sources cited above.
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Thursday, September 12, 2013

Fermi LAT Weekly Report N. 274

Covered period: 2013.Sep.02 - 2013.Sep.08
LAT Mission week: 274.57 - 275.57
  • The quasar 4C+21.35 (PKS 1222+21) was strongly detected from September 2 through September 6 reaching a peak daily averaged flux of (4.1 +/- 0.5) on September 4. Its activity triggered a GCN Notice. This is the strongest flare from this source since a period of activity ending June 2010.
  • PKS 1510-08 was detected on September 4, 5, 7 and 8 with a daily averaged flux between (1.8 +/- 0.5) and (3.7 +/- 0.7).
  • 4C +38.41 (B2 1633+38) was detected on September, 3, 4, 5, 6, and 8 with a daily averaged flux between (0.7 +/- 0.2) and (1.3 +/- 0.2).
  • PKS 2326-502 was detected on September 4 and 7 with a daily averaged flux of (1.1 +/- 0.3) and (0.8 +/- 0.2) respectively.
  • 3C 454.3 was detected on September 5 and 8 with a daily averaged flux of (0.6 +/- 0.2) and (1.0 +/- 0.3) respectively.
  • Sporadic daily detections of blazars (fluxes below 1X10-6): PKS 1424-41, NGC 1275, Mrk 421, PKS 0454-234, PKS 0426-380.

Fluxes are in the unit of 10-6 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.

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Wednesday, September 4, 2013

Fermi LAT Weekly Report N. 273

Covered period: 2013.Aug.26 - 2013.Sep.01
LAT Mission week: 273.57 - 274.57
  • A bright flare from the narrow-line Seyfert galaxy 1H 0323+342 was detected for the first time on August 28 with a daily averaged flux of (1.0 +/- 0.3) which is 29 times its daily averaged flux from the 2FGL catalog (see ATel #5344). It peaked on August 30 with a daily averaged flux of (2.0 +/- 0.4) which is 56 times the 2FGL flux.
  • PKS 1510-08 was detected all week with a daily averaged flux between (1.4 +/- 0.4) and (2.2 +/- 0.5).
  • 4C +38.41 was detected all week with a daily averaged flux between (1.2 +/- 0.3) and (2.2 +/- 0.4).
  • 3C 454.3 was detected all week with a daily averaged flux between (0.6 +/- 0.2) and (1.3 +/- 0.4).
  • Sporadic daily detections of blazars (fluxes below 1X10-6): Mkn 421, NGC 1275, PKS B1424-418, PKS 2155-304, PKS 0426-380.

Fluxes are in the unit of 10-6 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:
- B. Carpenter (carpbr01[at]gmail.com) for generic information related to this week
- Contact persons on this page for individual sources cited above.

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Monday, August 26, 2013

Fermi LAT Weekly Report N. 272

Covered period: 2013.Aug.19 - 2013.Aug.25
LAT Mission week: 272.57 - 273.57
  • PKS0920-39 (RA: 140.548 Dec: -39.7036) was detected with daily averaged gamma-ray flux (0.9 +/- 0.2) on August 23, 2013. This source is not included in any Fermi LAT catalog. Regarding this detection, ATel #5326 was posted.
  • 4C +38.41 was detected all week with a daily averaged flux between (0.6 +/- 0.2) and (1.8 +/- 0.4).
  • 3C 454.3 was detected 5 days in this week with a daily averaged flux between (0.6 +/- 0.2) and (1.1 +/- 0.3).
  • PKS B1424–418 was detected 3 days in this week with a daily averaged flux between (0.5 +/- 0.2) and (1.1 +/- 0.3).
  • PKS B1510-08 was detected 3 days in this week with a daily averaged flux between (1.2 +/- 0.3) and (2.9 +/- 0.5).
  • BL Lac was detected 2 days in this week with a daily averaged flux at (0.4 +/- 0.2).
  • Sporadic daily detections of blazars: PKS 0454-234, Mkn 421, NGC 1275, OX 169, CTA 102, B2 2319+31.

Fluxes are in the unit of 10-6 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:
- Y. Tanaka (ytanaka[at]hep01.hepl.hiroshima-u.ac.jp) for generic information related to this week
- Contact persons on this page for individual sources cited above.

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Saturday, August 24, 2013

Fermi LAT Weekly report N. 271

Covered period: 2013 August 12-18
LAT Mission week: 271.57 - 272.57
  • Star Nova Delphini 2013 detected in gamma-ray band with a flux level of (0.33+/-0.08)E-6 on August 18. See ATel#5302.
  • Bright blazars of the week, showing daily flux oscillating around 1E-6 flux level are: PKS 1424-41,  3C 454.3, 4C +38.41 (B2 1633+38) and PKS 1510-08.
  • Radiogalaxy NGC 1275 (Perseus A) detected with increasing flux during the week and approaching 1E-6 level.
  • Blazar CTA 102  bright and detected almost all the week with daily flux around 0.7E-6.
  • Other blazars detected in some days of the week (with daily flux lower than about 0.5E-6): Mkn 421, BL Lacertae, PKS 2320-035, PKS 2326-502,  PMN J1506+0814 (detected on August 14),  PKS 0426-380,  PKS 2155-304,  NRAO 190 (detected on August 15), PKS 1016-311 (detected on August 16), B2 1520+31, 1ES 1959+650, B2 2319+31 (detected on August 18).

  
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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Wednesday, August 14, 2013

Fermi LAT weekly report N. 270

Covered period: 2013.August.05 - 2013.August.11
LAT Mission week: 270.57 - 271.57
  • Blazar 4C +38.41 (B2 1633+38) was bright all week despite decreased flux with respect the week before. It was detected every day with a daily averaged flux between (1.3 ± 0.3) and (2.0 ± 0.3).
  • Mkn 421 was detected nearly every day, with averaged flux values < (0.6 ± 0.2).
  • 4C +21.35 (PKS 1222+21) was detected three times this week, with a decreasing flux value from (1.0 ± 0.2) on August 5, to (0.6 ± 0.2) recorded on August 11.
  • PKS 1510-08 was detected every day except on August 9, with averaged daily fluxes always greater than (1.0 ± 0.2), reaching its peak flux value of (1.6 ± 0.4) on August 8.
  • PKS 1424-41 was detected the last 4 days of the week with flux values always below 0.9.
  • The blazars detected sporadically with flux values equal or below 0.8 were: PKS 1124-186, PKS 2326-502, NGC 1275, and PKS 2155-304. The only exception was PKS 0805-07, detected on August 8 with flux value of (1.1 ± 0.4).

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:
- E. Antolini (elisa.antolini@fisica.unipg.it) for generic information related to this week
- Contact persons on this page for individual sources cited above.

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