Tuesday, April 8, 2014

Fermi LAT Weekly report N. 304


Covered period: 2014.Mar.31 - 2014.Apr.6
LAT Mission week:304.57 - 305.57

  • The outburst of the FSRQ 3C 279 continued during the week and reached the highest daily averaged of (7.0±0.7)E-6 on April 5. This is the highest gamma-ray flux ever observed by the LAT from 3C 279. Strong variability on six-hour timescales has been detected, showing a minimum flux of about 1.8E-6 and maximum of about 10.4E-6 on April 5.
  • 3C 454.3 was in a high state during the week reaching a peak daily flux of about 2.4E-6 on April 5.
  • PKS B1424–418 was detected during the week with a maximum daily flux of about 1.4E-6 on April 2.
  • A non-2FGL gamma-ray source was detected on April 3 with a daily flux of about 0.4E-6 at RA=37.4583 Dec=-48.0284 with a 1-sigma error circle radius of 0.22. A possible counterpart is the FSRQ PMN J0231-4746 (z=0.77) located 0.35 degrees away.
  • A non-2FGL gamma-ray source associated with PKS 2136-642 (ATel#5695) was detected on April 4 with a daily flux of about 0.5E-6.
  • The FSRQ PKS B1319–093 was detected on April 1 with a daily flux of (0.50±0.13)E-6. The flux level corresponds to 27 times the flux reported on the 2FGL catalog.
  • Sporadic daily detections of blazars (fluxes below 1): Mkn 421, PKS B1056–113, PKS 1510–08, S4 1144+40, OP 313 and 4C +21.35.

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:
- J. Becerra Gonzalez (josefa.becerra[at]nasa.gov) for generic information related to this week
- Contact persons on this page for individual sources cited above.


 


Tuesday, April 1, 2014

Fermi LAT Weekly report N. 303


Covered period: 2014 March 24-30
LAT Mission week: 303.57 - 304.57

  • Outburst of 3C 279 in the second part of the week. This FSRQ showed increasing brightness reaching a daily averaged flux level of (4.0±0.5)E-6 and a 6-hour averaged flux of (9.9±1.8)E-6 on March 30. This outburst corresponds to the second highest gamma-ray flux ever observed by the LAT from 3C 279 since the start of the Fermi mission (see ATel#6036). At 21:56 UT on March 31, Fermi started a 350ks target of opportunity observation to increase LAT exposure on this blazar.
  • Enhanced gamma-ray activity from blazar MG J221916+1806 (CRATES J2219+1806, CGRaBS J2219+1806, BZQ J2219+1806) with a weekly flux about 0.1E-6 and discovered thanks to new method implemented within the LAT Collaboration known as "Fermi All-sky Variability Analysis" (FAVA) (see ATel#6020). 
  • 3C 454.3 was in high state during the week reaching a daily flux of about at 2.1E-6 on March 28.
  • PKS 1424-41 detected all the days of the week and peaking at about 1.3E-6 on March 26.
  • S5 1044+71 detected all the days of the week and peaking at about 0.8E-6 on March 24 and 30.  
  • Further bright blazars detected in some days of the week with a daily flux in the range 0.6-0.8E-6: PKS 1510-08, OJ 287, PKS 0426-380, Mkn 421.
  • Other blazars and AGNs of the week: Mkn 501, B2 1144+40, 4C +38.41 (B2 1633+38, S4 1633+38), 3C 66A, Fermi J1532-1321 (TXS 1530-131), 4C +01.28 (PKS 1055+01), PMN J0948+0022 (a NLSy1).
  • Non-2FGL gamma-ray source associated to PKS 2136-642 (ATel#5695) showed enhanced activity during the week, being detected the last three days of the week and peaking in daily flux at  about 0.9E-6 on both March  28 and 30. GCN circular #16062 is possibly related to this flaring activity. 
  • GRBs detected by the LAT during the week: GRB 140323A, GRB 140329A, while GRB 140330A is retracted in follow-up GCN circular #16062.

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.


 


Wednesday, March 26, 2014

Fermi LAT Weekly Report N. 302


Covered period: 2014.Mar.17 - 2014.Mar.23
LAT Mission week: 302.57 - 303.57

  • 3C 454.3 was detected March 22 and 23 with a daily averaged flux between (1.3 +/- 0.5) and (1.8 +/- 0.7).
  • PKS 1424-418 was detected all week with a daily averaged flux between (0.7 +/- 0.3) and (1.6 +/- 0.4).
  • Sporadic daily detections of blazars (fluxes below 1):PKS 1510-08, 4C +21.35 (PG 1222+216), 3C 279, PKS 0454-234, B2 1520+31, S5 1044+71, PKS 1730-13, NGC 1275 (Per A), 4C +38.41 (S4 1633+38, B2 1633+38).

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.


Tuesday, March 25, 2014

Fermi LAT weekly report N. 301


Covered period: March 10 - March 16 2014
LAT Mission week: 301.57 - 302.57

  • On 2014 March 10 the Crab Nebula has been observed in flaring state showing a daily flux of 5.7+/-0.5 (ATel #5971). Consequently, Fermi interrupted the planned observation to maximize the exposure toward the Crab Nebula.
  • 3C 279 brightened the last day of the week with a daily flux around 1.2.
  • PKS 1424-41observed in the second part of the week with daily average flux of 0.7.
  • 4C +38.41 (S4 1633+38, B2 1633+38) observed throughout the week with daily average flux of 0.5.
  • B2 1520+31 detected almost all week with an average daily flux of 0.5.
  • NGC 1275 (Per A) observed three times this week (daily flux between 0.4 and 0.5).
  • Mrk 421 detected on March 10, March 11 and March 15 with daily average flux of 0.3.
  • Other blazars detected sporadically (fluxes < 1):4C +21.35(PG 1222+216), 4C +01.02 (PKS 0106+01, OC 12), B2 1144+40, PKS 1510–08, PKS 2326–502, 3C 454.3, 3C 66A, PKS 0454–234, PKS 2155-304, PKS 0301-243

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:
- Dario Gasparrini (gasparrini[at]asdc.asi.it) for generic information related to this week
- Contact persons on this page for individual sources cited above.


Tuesday, March 18, 2014

Fermi LAT weekly report N. 300


Covered period: March 03 - March 09 2014
LAT Mission week: 300.57 - 301.57

  • 3C 279 and PKS 0458-02 detected all week with a daily averaged flux around 0.5.
  • PKS 1424-41 and 4C +38.41 observed throughout the week with daily average flux of 0.6.
  • 4C +21.35 detected all week long (daily flux between 0.3 and 0.9).
  • 4C +01.02 and B2 1520+31 detected almost all week with an average daily flux of 0.7 and 0.5, respectively.
  • NGC 1275 observed three times this week (daily flux between 0.4 and 0.6)
  • B2 1144+40 observed on March 5 and March 8 at daily flux of 1.1 ± 0.3 and 1.0 ± 0.3, respectively.
  • Mrk 421 detected on March 7 and March 8 at daily flux of 0.7 ± 0.2.
  • Other blazars detected sporadically (fluxes < 1): PKS 0426–380, 3C 345, S5 0716+714, OJ 287, PKS 0426–380, PKS 2326–502, TXS 1530-131, 4C +28.07, FERMI J1532-1321, PKS 1510–08, Mrk 501, IC 310, PG 1553+113, 3C 273. 

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:
- Sara Buson (buson@pd.infn.it) for generic information related to this week
- Contact persons on this page for individual sources cited above.

Friday, March 7, 2014

Fermi LAT weekly report N. 299


Covered period: February 24- March 02 2014
LAT Mission week: 299.57 - 300.57

  • Flares from gamma-ray sources PKS 0458-02 and B2 1144+40 (S4 1144+40) were detected on March. 2 with a peak daily averaged fluxes of (0.9 +/- 0.3) . See ATel#5951.
  • PKS B1424–418 was detected all week with a daily averaged flux between (0.5 +/- 0.2) and (0.9 +/- 0.2).
  • 4C +21.35, B2 1520+31 and PKS 2326–502 were seen three times this week with daily averaged flux value respectively between (0.9 +/- 0.2) - (0.7 +/- 0.3), (0.4 +/- 0.1) -(0.7 +/- 0.2) and (0.5 +/- 0.1) - (0.6 +/- 0.1).
  • PKS 0256+075 and 3C 454.3 were detected in the middle of the week with maximum daily flux of (0.7 +/- 0.2) and (1.4 +/- 0.3).
  • 3C 279 was seen during the last two days of the week with fluxes of (2.4 +/- 0.4) and (3.6 +/- 0.4).
  • Other blazars detected sporadically (fluxes < 1): S5 1044+71,4C +01.02,Mkn 421,PKS 1622–29,PKS 0301–243,PKS 2155–304,PKS 0537–441, PMN J0422–0643, PKS 2032+107,IC 310.

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


Friday, February 28, 2014

Fermi LAT Weekly report N. 298


Covered period: 2014.Feb.17 - 2014.Feb.23
LAT Mission week: 298.57 - 299.57

  • A flare from gamma-ray source 4C +01.28 (PKS 1055+018) was detected on Feb. 17 with a peak daily averaged flux of (1.0 ± 0.3) (See ATel #5909)
  • S5 1044+71 was detected all week with a daily averaged flux between (0.6± 0.2) and (1.0 ± 0.2).
  • 4C +21.35 (PG 1222+216) was detected on Feb. 18, Feb. 19, Feb. 20 and Feb. 23 with daily averaged fluxes between (0.7 ± 0.2) and (1.2 ± 0.3).
  • 3C 454.3 was detected on Feb. 18 with a daily averaged flux of (1.7 ± 0.7).
  • Sporadic daily detections of blazars (fluxes below 1): PKS 0426-380, PKS 1424-41, 3C 279, NGC 1275, Mrk 421, Mrk 501, FERMI J1532-1321, PKS 2155-304, S4 1144+40, OJ 287, 1H 1013+498, PKS 1510-08, S5 1803+78.

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:
- F. Krauss (Felicia.Krauss[at]sternwarte.uni-erlangen.de) for generic information related to this week
- Contact persons on this page for individual sources cited above.