Fermi LAT weekly report N. 130

---

Covered period: 2010.Nov.29 - 2010.Dec.5

LAT Mission week: 130.57 - 131.57

---

• PKS 0447-439 was detected in high activity state on Dec. 5, with a daily flux of (0.6+/-0.2)e-6.
  VHE emission from this source was discovered by H.E.S.S. on November-December 2009 (ATel #2350). PKS 0447-439 has been associated with a BL Lac object at z ~ 0.2 (Perlman et al. 1998, ApJ 115, 1253) or with a Seyfert 1 galaxy located at a redshift of z=0.107 (Craig & Fruscione 1997, AJ, 114, 4).



• 3C 454.3 very bright for all the week, but with a decreasing daily flux from 24.0E-6 to 15.0E-6.


• PKS 0537-441 detected for all the week, with daily flux between 0.4E-6 and 0.9E-6.


• 4C +21.35 detected on four consecutive days this week (Dec. 1-4), with increasing flux between 0.7E-6 and 2.8E-6.


• PKS 2155-304 detected on Dec. 2, 4, and 5, with daily flux between 0.2E-6 and 0.4E-6.


• PKS 2326-502 detected in high activity state on Dec. 3 and 4, with daily flux of 1.0e-6 and 1.3e-6, respectively.


• Sporadic daily detections of blazars: PKS 0524-485 (Nov. 29), B2 1520+31 (Nov. 29), PKS 0402-362 (Nov. 30), B3 1708+433 (Nov. 30, Dec. 1), 3C 66A (Dec. 2), PKS 0336-01 (Dec. 3), CRATES J2237-3921 (Dec. 3).

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 (dammando[at]ifc.inaf.it) for generic information related to this week

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

---

Fermi LAT weekly report N. 125

---

Covered period: 2010.Oct.25 - 2010.Oct.31

LAT Mission week: 125.57 - 126.57

---

• The flat-spectrum radio quasar 3C 454.3 is still the brightest extragalactic source on the sky. The largest daily flux this week was (7.6 ± 0.8)e-6 on Oct 28.


• The flat-spectrum radio quasar 4C +21.35 was bright from Oct 25-29, reaching (1.9 ± 0.4)e-6 on Oct 26.


• The flat-spectrum radio quasar PKS 2326-502 was detected throughout the week, reaching (1.3 ± 0.3)e-6 on Oct 27.


• The flat-spectrum radio quasar PMN J2345-1555 was detected throughout the week, reaching (0.7 ± 0.2)e-6 on Oct 29. This is part of ongoing activity reported in several ATels (#2972, #2977, #2986, #2989, #3004).


• The flat-spectrum radio quasar B2 1846+32A reached (1.1 ± 0.3)e-6 on Oct 29.


• The BL Lac PKS 0537-441 was detected on Oct 26 at (0.9 ± 0.3)e-6 and again on Oct 31 with a similar flux.


• The classic BL Lac Mkn 421 was detected on Oct 26 and 31 at (0.2 ± 0.1)e-6.


• The following sources were detected sporadically (in one of the seven one-day time bins): PKS 2155-304, B3 1708+433, PKS 1730-13. PKS 1730-13 turned out to be the beginning of a flare that was sustained into the following week, as reported in ATel #3002.



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:

- J. Vandenbroucke (justinv[at]stanford.edu) for generic information related to this week.

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

---

Fermi LAT weekly report N. 126

---

Covered period: 2010.Nov.1 - 2010.Nov.7

LAT Mission week: 126.57 - 127.57

---

• PKS 1730-13 detected in flare on Nov. 1-2, reaching a daily flux of (1.7+/-0.3)E-6 (see ATel#3002) and continued to be active for most of the week.


• 3C 454.3 very bright for all the week with daily flux between 8.0E-6 (Nov. 1) and 14.0E-6 (Nov. 5).


• PKS 1830-211 detected for all the week with daily flux between 0.8E-6 and 2.5E-6.


• PKS 2326-502 detected in high activity state during the entire week, with daily flux between 0.7E-6 and 1.5E-6.


• CGRaBS J2345-1555 (also known as PMN J2345-1555) detected on three consecutive days this week (Nov. 1-3), with daily flux between 0.6E-6 and 0.8E-6.


• B3 1708+433 detected in high activity state on Nov. 3, with daily flux of about 0.9E-6.


• 4C +21.35 detected on Nov. 2, 4, and 5, with daily flux between 0.3E-6 and 1.3E-6.



• Sporadic daily detections of blazars: PKS 0537-441, B2 1215+30, B3 2308+34, B2 0619B+33, B2 1520+31, PKS 0336-01, PKS 2155-304, 3C 66A, BL Lacertae, 3C 279.

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]ifc.inaf.it) for generic information related to this week

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

---

Fermi LAT weekly report N.123

---

Covered period: 2010 Oct. 11 - 17

LAT Mission week: 123.57 - 124.57

---

• Outburst of high-redshift and gravitationally lensed FSRQ PKS 1830-211 (z=2.507), with important gravitational magnification and Galactic absorption features. The source on October 14, 2010 showed a bright gamma-ray outburst with a daily flux of (5.2+/-1.1)E-6 more than a factor of 12 greater than reported in the Fermi-LAT 1st year catalog (ATel#2943). The flux was higher on Oct. 15 (7.8+/-0.9)E-6, about 18 times the 1-year catalog average flux).


• PKS 2155-304 reached the threshold of daily flux (1.0+/-0.3)E-6, with photon index 2.6+/-0.3 (ATel#2944). 
  
  This index value can be due to statistical dispersion and flux-index correlation at low test statistics
  values, close to the sensitivity curve, rather than to a real softer-when-brighter behavior of this high-energy peaked
  blazar.


• CRATES J0531-4827 bright during the week. 


• 3C 454.3 bright above daily flux 2E-6.
  
  The flare of 4C 21.35 is continuing also this week (daily flux above 2E-6).


• PKS 1329-049 flare at about 1.7E-6 id a day of the week.
  
  Other sporadic detected blazars: PKS 2326-502, PKS 0208-512, B2 1520+31, PKS
  0426-380, S4 1030+61, PKS 2142-75, B2 0619+33, Mkn 421, 4C 38.41 (B2 1633+38), B2 1846+32A, GB6 J1722+6105, PKS 0537-441, PKS 0244-470

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

Note. All the fluxes 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]pg.infn.it) for generic information related to this week

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

---

Fermi LAT weekly report N.122

---

Covered period: 2010 Oct. 4 - 10 

LAT Mission week: 122.57 - 123.57

---

• CRATES J0531-4827 and PKS0537-441 bright during the week.


• 3C 454.3 bright above daily flux 2E-6.


• A new flare of 4C 21.35.


• PKS 2326-502 in high state at the beginning of the week 


• Sun eclipse of 3C 279 on Oct.8


• Other sporadic detected blazars: PKS 1313-333, PKS 1329-049, B2 1520+31, PKS
  0426-380, PKS 1157-215, S4 1030+61, PKS 0727-11, B2 0619+33.

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

Note. All the fluxes 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]pg.infn.it) for generic information related to this week

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

---

Fermi LAT weekly report N.123

---

Covered period: 2010.Oct.18 - 2010.Oct.24

LAT Mission week: 123.57 - 124.57

---

• NGC 1275 was detected on Oct. 20 and 24 (daily flux below 0.7 X 10^-6).


• PKS 0426-380 was detected on Oct. 18, 21, and 23 (daily flux below 0.7 X 10^-6).


• PKS 0524-485 was detected on Oct. 18, 20, and 21 (daily flux between 0.3 and 0.9 X 10^-6).


• B2 0619+33 continued to be detected through the entire week (flux between 0.8 and 1.4 X 10^-6).


• Mkn 421 was detected on Oct. 18, 23, and 24 (daily flux at 0.3 X 10^-6).


• 4C 21.35 was relatively bright during all week, with daily flux below 1.6 X 10^-6.


• PKS 1830-21 continued to be detected with a peak flux of 4.6 X 10^-6 on Oct. 18.


• The FSRQ PKS 1846+32A (CGRaBS J1848+3219) appeared on Oct. 17 with a flux of 0.7 X 10^-6, when a simultaneous near-infrared flare was observed (ATel#2953). The source increased the gamma-ray flux up to 2.2 X 10^-6 on Oct. 18 (see ATel#2954). In the following days the flux level stabilized between 0.7 and 1.2 X 10^-6.


• The FSRQ PMN J1913-3630 appeared on Oct 21 and 22. In the first day the daily flux was 1.3 X 10^-6 and an ATel was posted (ATel#2966). The source was not detected previously neither by LAT or by EGRET.


• PKS 2155-304 continued to be detected through the week (flux between 0.5 and 0.9 X 10^-6).


• 3C 454.3 was very bright during all week, with daily flux above 3.9 and up to 5.1 X 10^-6.


• PKS 2326-502 was detected on Oct. 20, 22, and 24 (flux between 0.7 and 1.0 X 10^-6).


• The FSRQ CGRaBS J2345-1555 appeared in the last day of the week with a flux of 0.6 X 10^-6. The source showed an increased activity in the optical and a joint ATel with the ATOM team was posted (ATel#2972).


• Sporadic activity observed from PKS 0537-441 (Oct. 19 and 21), CGRaBS J1033+6051 (Oct. 19 and 20), B2 1348+30B (Oct. 23), and B3 1708+433 (Oct. 18). All fluxes below 1.0 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:

- 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.

---

Fermi LAT weekyl report N.120

---

Covered period: 2010.September.27 - 2010.October.3

LAT Mission week: 121.57 - 122.57

---

• Following the increased gamma-ray activity report by the AGILE and LAT collaborations from the Crab Nebula ( ATel #2855, ATel #2861), the daily flux appears to be returning to typical levels. The Crab was seen throughout the week ranging in daily flux from (4.2+/-0.7)E-6 on the 28th to (2.3+0.5)E-6 on the 1st.



• The FSRQ 3C279 was detected in a flaring state on the 27th with a daily flux of (3.9+/-1.4) E-6, Atel #2886. The flux decreased steadily over the next 3 days to a daily value of (0.7+/-0.3) on the 30th and was not seen in the second half of the week.



• CRATES J0531-4827 (also known as PMN J0531-4827) was detected in a high state throughout the week. The daily flux ranged from (0.8+/-0.3)E-6 on the 27th to (1.6+/-0.3)E-6 on the 2nd. The LAT collaboration reported the detection of GeV gamma-ray emission from this blazar in Atel #2907. It is very close spacially to PKS 0524-485.



• 3C454.3 was detected most days this week with an average daily flux of 2.6E-6.



• PKS 1329-049 exhibited a high daily flux of (1.4+/-0.1)E-6 on the 28th and in total was detected on 4 days this week (28th, 29th, 1st, 3rd).



• B2 0619+33 was detected on the 27th, 1st and 2nd.



• Sporadic activity from B2 1510+31, PKS 0537-441, PKS 0426-380, PKS 0727-11, PKS 2326-502 , CRATES J1640+3946 and 4C+21.35.

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 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:

- A. Cannon (annacannon1984@gmail.com) for generic information related to this week

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

---