fermi lat observation of snr
DESCRIPTION
Fermi LAT observation of SNR. Abdo , 2010 Li, 2010 J.H.K.Wu , 2011 M.Dalton , 2011 John W.Hewitt , 2009 (a, b). Kes 17. Kes 17 (G304.6+0.1 ) 1720 MHz OH maser ( Frail et al. 1996 ) 9.7 kpc ( Caswell et al. 1975) - PowerPoint PPT PresentationTRANSCRIPT
Fermi LAT observation of SNRAbdo, 2010
Li, 2010J.H.K.Wu, 2011M.Dalton, 2011
John W.Hewitt, 2009 (a, b)
Kes 17
• Kes 17 (G304.6+0.1)• 1720 MHz OH maser (Frail et al. 1996)• 9.7 kpc (Caswell et al. 1975)• thermal and a small non-thermal contribution
-XMM-Newton (Combi et al. 2010)• a middle-aged SNR of (2.8 − 6.4) × 104 yrs• no TeV emission
High-light
Do not only trust Fermi team
Use Catalog and possibility to check
Problem
Old back ground model(long time data and old back model)
No source there (even the 2FGL)
CMAP can’t tell anything
Unbinned & binned?(time, memory and possibility)
2FGL J1303.7-6316c
HESS J1303-631• binary system PSR B1259-63• Extended: ~0.18 deg
HESS J1303-631• Extended: ~0.18 deg• High spin-down power • pulsar: 1.7e36 erg/sec• Young pulsar: 11,000 years• DM Distance: 6.6 kpc (NE2001, Cordes & Lazio)
• At this distance, Gamma-rays represent only 3.7% of• pulsar spin down power (i.e. Gamma-ray efficiency)
• X-ray PWN identified• HESS J1303-631 can now be identified as a• synchrotron underluminous PWN
OH(1720 MHz) masers
• Green Bank Telescope and Very Large Array• Four SNRs are detected with OH masers: G5.4-
1.2, G5.7-0.0, G8.7-0.1, and G9.7-0.0• Two SNRs, G5.7-0.0 and G8.7-0.1, have TeV γ -
ray counterparts• G8.7-0.1 (W30)• W28 (G5.4-1.2, G5.7-0.0)
W28 (G5.4-1.2, G5.7-0.0)
Thanks