INTEGRAL observations of PSR J1811-1925 and its associated Pulsar Wind Nebula

Details INTEGRAL observations of PSR J1811-1925 and its associated Pulsar Wind Nebula INTEGRAL observations of PSR J1811-1925 and its associated Pulsar Wind Nebula

2007-11-05

arxiv.org/abs/0711.0648v1

Astronomy and Astrophysics

Astrophysics

6 pages, 2 figures, accepted for publication in MNRAS

Scientific paper

10.1111/j.1745-3933.2007.00415.x

We present spectral measurements made in the soft (20-100 keV) gamma-ray band of the region containing the composite supernova remnant G11.2-0.3 and its associated pulsar PSR J1811-1925. Analysis of INTEGRAL/IBIS data allows characterisation of the system above 10 keV. The IBIS spectrum is best fitted by a power law having photon index of 1.8^{+0.4}_{-0.3} and a 20-100 keV flux of 1.5E{-11} erg/cm^2/s. Analysis of archival Chandra data over different energy bands rules out the supernova shell as the site of the soft gamma-ray emission while broad band (1-200 keV) spectral analysis strongly indicates that the INTEGRAL/IBIS photons originate in the central zone of the system which contains both the pulsar and its nebula. The composite X-ray and soft gamma-ray spectrum indicates that the pulsar provides around half of the emission seen in the soft gamma-ray domain; its spectrum is hard with no sign of a cut off up to at least 80 keV. The other half of the emission above 10 keV comes from the PWN; with a power law slope of 1.7 its spectrum is softer than that of the pulsar. From the IBIS/ISGRI mosaics we are able to derive 2 sigma upper limits for the 20-100 keV flux from the location of the nearby TeV source HESS J1809-193 to be 4.8E{-12} erg/cm^2/s. We have also examined the likelihood of an association between PSR J1811-1925 and HESS J1809-193. Although PSR J1811-1925 is the most energetic pulsar in the region, the only one detected above 10 keV and thus a possible source of energy to fuel the TeV fluxes, there is no morphological evidence to support this pairing, making it an unlikely counterpart.

Affiliated with

Also associated with

No associations

Rating

INTEGRAL observations of PSR J1811-1925 and its associated Pulsar Wind Nebula does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with INTEGRAL observations of PSR J1811-1925 and its associated Pulsar Wind Nebula, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and INTEGRAL observations of PSR J1811-1925 and its associated Pulsar Wind Nebula will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-660051