Fermi Gamma-Ray Sky

Tuesday, June 25, 2013

Fermi LAT Weekly report N. 263

Covered period: 2013 June 17-23
LAT Mission week: 263.57 - 264.57

Blazars PKS 1424-41 and 4C +38.41 (B2 1633+38) are continuing to show a high activity state,
NRAO 190 (PKS 0440-00) is showing high activity since June 21 (ATel #5156) and has reached the highest daily flux on June 22 (flux=1.3E-6). This FSRQ was detected in a similar high gamma-ray state in May 2009 (ATel #2049) and, since then, has remained almost steady showing low gamma-ray activity.
Sporadic detection of PKS 1510–08 (with daily flux as high as 1.4E-6 on June 18).
PKS 1424-418 and 4C +38.41 (B2 1633+38) persisting bright with daily flux around 1E-6 almost every day of the week.
Blazar CTA 102 still present some days of the week with daily flux level ranging between 0.7 and 1.8E-6.
Further bright blazars detected some days of the week with daily flux level between about 0.7E-6 and 1E-6 are PKS 0454–234 and PKS 0426-380.
Other blazars detected, also sporadically, during the week, with daily flux below 1E-6 level are: Mkn 421, PKS 1124–186, PKS 0716+714, PKS 2155-304, S4 1030+61.
NGC 1275 showing sporadic activity.

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. Buson (sarabuson[at]pd.infn.it) for generic information related to this week
- Contact persons on this page for individual sources cited above.

Tuesday, June 18, 2013

Fermi LAT Weekly report N. 262

Covered period: 2013 June 10-16
LAT Mission week: 262.57 - 263.57

Blazars PKS 1424-41 and 4C +38.41 (B2 1633+38) are continuing to show a high activity state, both peaking at a daily flux level of 1.4E-6, on June 11 and 15 the former, on June 13 the latter.
Blazar CTA 102 is increasing in activity during the week (peaking at daily flux level of 1.6E-6 on June 16).
Radiogalaxy NGC 1275 (Perseus A) is active and detected all the days of the week, with daily flux around 0.5E-6.
Further bright blazars detected in some days of the week with daily flux level between about 0.7E-6 and 1E-6 are: PKS 0426-380, PKS 0454-234, PKS 0507+17, PKS 2320-035, PKS 1510-08, 3C 454.3.
Other blazars detected, also in a single day, during the week, with daily flux value equal or below 0.6E-6 are: Mkn 421, PKS 2320-035, S5 1044+71, S5 0716+71, B3 1343+451, PMN J2345-1555, PMN J2250-2806, PKS 0521-36, PKS 2155-304.

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.

Monday, June 10, 2013

Fermi LAT Weekly report N. 261

Covered period: 2013 June 3-9
LAT Mission week: 261.57 - 262.57

CTA 102 is continuing to show a high activity state, peaking at a daily flux level of 1.5E-6 both on June 6 and 9.
PKS 1424-41 is bright and peaking at a daily flux level of 1.3E-6 on June 9.
Further bright blazars detected in some days of the week with daily flux level between about 0.6E-6 and 1E-6 are:
4C +38.41 (B2 1633+38), NGC 1275, PKS 0426-380, PKS 0454-234, PKS 1510-08 and PKS 1124-186.
Other blazars detected, also in a single day during the week, with daily flux value equal or below 0.5E-6 are:
S5 0716+71, S5 1217+71, S5 1044+71, NRAO 190 (PKS 0440-00), 3C 454.3, Mkn 421, PKS 0301-243, PMN J2250-2806, PMN J2345-1555, PMN J1433-2132.

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. 260

Covered period: 2013 May 26 - Jun 2
LAT Mission week: 259.57 - 260.57

CTA 102 is active during the week peaking at 1.9E-6 on May 28th and 1.5E-6 on May 31st.
PKS 1424-41 is bright and active with daily flux of 1.6E-6 on June 1st.
PKS 0426-380 is active during the week and peaking at 1.3E-6 on May 31st.
Other blazars detected, also sporadically, during the week, with daily flux below 1E-6 level are: Mkn 421, PKS 0454–234, S5 0716+71, PMN J2345-1555, PMN J0017–0512, S5 1044+71, NRAO 190, 3C 454.3 and 4C +38.41 (B2 1633+382).

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:
- D. Bastieri (denis.bastieri[at]pd.infn.it) for generic information related to this week
- Contact persons on this page for individual sources cited above.

Wednesday, May 29, 2013

Fermi LAT weekly report N. 259

Covered period : 2013.May 20 - 2013.May 26
LAT Mission week: 259.57 - 260.57

The source PKS 1424-41 was seen all week in a bright state with flux values greater than 1 X 10^-6, while the blazar PKS 0426-380 was detected in a high state only on May 20.
The FSRQ PMN J0017–0512 was detected on May 24, with daily flux of 1.1 X 10^-6; the day after the flux increased its value up to 2.0 X 10^-6, 52 times the mean flux value recorded in 2FGL. This detection was eligible for an ATel that was published on May 27.See ATel#5089.
PKS 1124-186 was detected three times with daily flux of about 0.5-0.6 X 10^-6 and PKS 0454–234 was seen after May 22 with fluxes always lower than 1 X 10^-6.
The sources significantly detected sporadically were PKS 0507+17, S5 1044+71, PKS 2326–502, PMN J2345-1555, 4C 38.41 and S5 0716+71.
LS I+61 303 was detected on May 26 with flux value greater than 2 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:
- E. Antolini (elisa.antolini@fisica.unipg.it) or D. Bastieri (denis.bastieri@pd.infn.it) for generic information related to this week.
- Contact persons on this page for individual sources cited above.

Monday, May 27, 2013

Fermi LAT weekly report N. 258

Covered period: 2013 May 13 - May 19
LAT Mission week: 258.57 - 259.57

The LAT detected a huge solar activity in coincidence with the X3.2 Solar Flare of May 13th and with the X1.2 flare of May 15th
The LAT detected also an activity toward the location of GRB130518, see GCN 14675
PKS 1424-41 is bright and active with daily flux of 1.8E-6 on May 13th and 2.1E-6 on May 16th.
PKS 0507+17 is active during the week and peaking at 2E-6 on May 19.
Blazars 4C +38.41 (B2 1633+382) detected in some days of the week in bright state (daily flux level above or around 1e-6).
Galactic plane TeV source VER J0521+211 flaring on May 15th at 1.8E-6.
Some activity detected by a source positionally coincident with TXS 0500+640 (GB6 J0505+6406), detected on May 16th and 17th between 0.3 and 0.5E-6
Detected also NGC 1275 on May 17th.
Other blazars detected, also sporadically, during the week, with daily flux below 1E-6 level are: Mkn 421, PKS 0426-380, S5 0716+71, CRATES J1435+2021, OX 169, PMN J2345-1555, B3 1343+451, 3C 454.3 and TXS 1700+685 (RX J1700.1+6830).

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

For questions and comments please contact:
- D. Bastieri (denis.bastieri[at]pd.infn.it) for generic information related to this week
- Contact persons on this page for individual sources cited above.

Thursday, May 23, 2013

Fermi LAT weekly report N. 257

Covered period: 2013.May.6 - 2013.May.12
LAT Mission week: 257.57 - 258.57

PKS 1424-41 is quite bright and active with daily flux about 2 X 10^-6 during the week.
PKS 0507+17 continues to be in high state with daily flux about 1 X 10^-6 during the week and peaking at 1.6 X 10^-6 on May 8th.
PKS 1510-089 continues to be detected with daily fluxes around or above 1 X 10^-6 .
MRK 421, PKS 0426-380, 3C66A, PMN J2345-1555, 4C +38.41 and NGC 1275 detected in one or two days of the week (flux below 1 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:
- S. Cutini (sara.cutini[at]asdc.asi.it) for generic information related to this week
- Contact persons on this page for individual sources cited above.