ChandraObservations of the Young Pulsar PSR B0540−69 | Zendy

P. Kaaret | Zendy; Herman L. Marshall | Zendy; Thomas L. Aldcroft | Zendy; Dale E. Graessle | Zendy; Margarita Karovska | Zendy; S. S. Murray | Zendy; A. H. Rots | Zendy; Norbert S. Schulz | Zendy; F. D. Seward | Zendy

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ChandraObservations of the Young Pulsar PSR B0540−69

Author(s) -

P. Kaaret,

Herman L. Marshall,

Thomas L. Aldcroft,

Dale E. Graessle,

Margarita Karovska,

S. S. Murray,

A. H. Rots,

Norbert S. Schulz,

F. D. Seward

Publication year - 2001

Publication title -

the astrophysical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.376

H-Index - 489

eISSN - 1538-4357

pISSN - 0004-637X

DOI - 10.1086/318287

Subject(s) - pulsar , physics , astrophysics , observatory , astronomy , nebula , photon , pulsar planet , angular resolution (graph drawing) , millisecond pulsar , binary pulsar , stars , optics , mathematics , combinatorics

The young pulsar PSR B0540-69 was one of the first targets observed with theChandra X-Ray Observatory. The high angular resolution of Chandra allows us toresolve the compact nebula surrounding the pulsar. We have determined aposition for PSR B0540-69 of R.A. = 05h 40m 11s.221, decl. = -69o 19' 54".98(J2000) with a 1-sigma radial uncertainty of 0.7". Combining our measurementsof the pulsar period with previous measurements covering a span of 12 years, wederive a braking index of 2.08. The spectrum of the pulsed emission isconsistent with a power-law with a photon index of 1.83 +/- 0.13. The compactnebula has a softer spectrum with a photon index of 1.85 to 2.26.Comment: 12 pages, accepted by the Astrophysical Journa

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