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          Institute: MPI für Radioastronomie     Collection: Publikationen des MPI für Radioastronomie     Display Documents

ID: 125591.0, MPI für Radioastronomie / Publikationen des MPI für Radioastronomie
The phase of the radio and X-ray pulses of PSR B1937+21
Authors:Cusumano, G.; Hermsen, W.; Kramer, M.; Kuiper, L.; Löhmer, O.; Massaro, E.; Mineo, T.; Nicastro, L.; Stappers, B. W.
Date of Publication (YYYY-MM-DD):2003-11
Title of Journal:Astronomy & Astrophysics
Journal Abbrev.:Astron. Astrophys.
Issue / Number:2
Start Page:L9
End Page:L12
Review Status:Peer-review
Audience:Experts Only
Abstract / Description:We present timing and spectral results of PSR B1937+21, the fastest known millisecond pulsar ( P similar or equal to 1.56 ms), observed with RXTE. The pulse profile, detected up to similar to 20 keV, shows a double peak with the main component much stronger than the other. The peak phase separation is 0.526 +/- 0.002 and the pulsed spectrum over the energy range 2 - 25 keV is well described by a power law with a photon index equal to 1.14 +/- 0.07. We find that the X-ray pulses are closely aligned in phase with the giant pulses observed in the radio band. This results suggest that giant radio pulses and X-ray pulses originate in the same region of the magnetosphere due to a high and fluctuating electron density that occasionally emits coherently in the radio band. The X-ray events, however, do not show any clustering in time indicating that no X-ray flares are produced.
Free Keywords:stars : neutron, pulsars : individual : PSR B1937+21, X-rays : stars
Comment of the Author/Creator:Date: 2003, NOV
External Publication Status:published
Document Type:Article
Communicated by:N. N.
Affiliations:MPI für Radioastronomie
External Affiliations:CNR, Sez Palermo, Ist Astrofis Spaziale & Fis Cosm, I-90146 Palermo, Italy.; SRON, Natl Inst Space Res, NL-3584 CA Utrecht, Netherlands.; Univ Manchester, Jodrell Bank Observ, Macclesfield SK11 9DL, Cheshire, England.; Max Planck Inst Radioastron, D-53121 Bonn, Germany.; Univ Roma La Sapienza, Dipartimento Fis, I-00185 Rome, Italy.; CNR, 1st Astrofis Spaziale * Fis cosm, Sez Roma, I-00100 Rome, Italy.; ASTRON, NL-7990 AA Dwingeloo, Netherlands.; Univ Amsterdam, Astron Inst Anton Pannekoek, NL-1098 SJ Amsterdam, Netherlands.
Identifiers:ISI:000185917300003 [ID No:1]
ISSN:0004-6361 [ID No:2]
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