UNSPECIFIED. (2006) The XMM-Newton view of the crab. ASTRONOMY & ASTROPHYSICS, 453 (1). pp. 173-180. ISSN 0004-6361

Full text not available from this repository.

Abstract

Aims. We discuss the current X-ray view of the Crab Nebula and Pulsar, summarising our analysis of observations of the source with the EPIC-pn camera on board the XMM-Newton observatory. Different modes of EPIC-pn were combined in order to yield a complete scenario of the spectral properties of the Crab resolved in space and time ( pulse phase). In addition we give a description of the special EPIC-pn Burst mode and guidance for data reduction in that mode. Methods. We analysed spectra for the nebula and pulsar separately in the 0.6-12.0 keV energy band. All data were processed with the SAS 6.0.0 XMM-Newton Scientific Analysis System package; models were fitted to the data with XSPEC 11. The high time resolution of EPIC-pn in its Burst mode (7 mu s) was used for a phase resolved analysis of the pulsar spectrum, after determination of the period with epoch folding techniques. Data from the Small Window mode were processed and corrected for pile-up allowing for spectroscopy simultaneously resolved in space and time. Results. The spatial variation of the spectrum over the entire region of the Crab shows a gradual spectral softening from the inner pulsar region to the outer nebula region with a variation in photon index, Gamma, from 2.0 to 2.4. Pulse phase resolved spectroscopy of the Crab Pulsar reveals a phase dependent modulation of the photon index in form of a significant hardening of the spectrum in the inter-peak phase from Gamma = 1.7 during the pulse peak to Gamma = 1.5.

Item Type:	Journal Article
Subjects:	Q Science > QB Astronomy
Journal or Publication Title:	ASTRONOMY & ASTROPHYSICS
Publisher:	EDP SCIENCES S A
ISSN:	0004-6361
Date:	July 2006
Volume:	453
Number:	1
Number of Pages:	8
Page Range:	pp. 173-180
Identification Number:	10.1051/0004-6361:20054783
Publication Status:	Published
URI:	http://wrap.warwick.ac.uk/id/eprint/33454

Data sourced from Thomson Reuters' Web of Knowledge

Request changes to a record

Actions (login required)

View Item