Astronomy and Astrophysics – Astrophysics
Scientific paper
Jan 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001a%26a...365l.212w&link_type=abstract
Astronomy and Astrophysics, v.365, p.L212-L217 (2001)
Astronomy and Astrophysics
Astrophysics
74
Ism: Supernova Remnants, Ism: Individual: Crab Nebula
Scientific paper
XMM-Newton observations of the Crab provide new information on its integrated X-ray spectrum and the variation of the spectral form across the nebula. The Crab pulsar and its surrounding torus exhibit the hardest spectra with power-law indices of Gamma = 1.6 and 1.8. The jet and outer reaches of the nebula are significantly softer with Gamma = 2.1 and 2.3 respectively. For the whole nebula, the huge number of recorded counts allows a detailed examination of the soft X-ray absorption due to cool gas in the foreground of the Crab. Absorption edges due to oxygen and neon are clearly identified. Oxygen and iron in the interstellar medium are underabundant by a factor of 0.63 +/- 0.01. The average N_H=3.45+/-0.02 1021 cm-2 and varies by less than +/-11% on a scale equal to or larger than 20 arcsec over the face of the nebula. These observations of the Crab provide an excellent demonstration of the power of the EPIC cameras on XMM-Newton for spatial, spectral and timing studies.
Abbey Anthony F.
Aschenbach Bernd
Becker Walter
Bonnet-Bidaud Jean-Marc
Griffiths Gareth R.
No associations
LandOfFree
New light on the X-ray spectrum of the Crab 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 New light on the X-ray spectrum of the Crab Nebula, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and New light on the X-ray spectrum of the Crab Nebula will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-920920