Discovery of an X-ray Synchrotron Nebula Associated with the Radio Pulsar PSR B1853+01 in the Supernova Remnant W44

Abstract

We report the detection using ASCA data of a hard X-ray source in the vicinity of the radio pulsar PSR B1853+01 which is located within the supernova remnant (SNR) W44. PSR B1853+01, a 267ms pulsar, has to date only been detected in the radio band. Previous observations at soft X-ray energies (e.g., with ROSAT HRI) have failed to detect any significant X-ray emission (pulsed or unpulsed) from the pulsar. Over the 0.5--4.0keV band, the ASCA data show soft thermal emission from W44 with a morphology very similar to that observed earlier by Einstein and ROSAT. In the high energy band (4.0--9.5 keV), the SNR is, for the most part, invisible, although a source coincident with the position of PSR B1853+01 is evident. The observed ASCA spectra, extracted from a region around the PSR position, are consistent with a power-law origin (photon index =~2.3) for the X-ray emission from this source at a flux level (flux density ~~0.5 10^-6 Jy at 1 keV) consistent with previous upper limits. Timing analysis of the hard X-ray source failed to detect pulsations at the pulsar's period. We conclude that the new hard source in W44 represents an X-ray synchrotron nebula associated with PSR B1853+01.

Ps version available at http://hea-www.harvard.edu/SNORE/snorePapers.html SNORE is a www site devoted to Super NOvaREmnants at http://hea-www.harvard.edu/SNORE/HomePage.html ; To appear in ApJL, 1996,20th June issue

References in corpus (1)

• The Pulsar Wind Nebula Around PSR B1853+01 in the Supernova Remnant W44

Cited by in corpus (22)

• Pulsar Wind Nebulae in Evolved Supernova Remnants
• Re-examining the X-Ray versus Spin-Down Luminosity Correlation of Rotation Powered Pulsars
• Radio to Gamma-Ray Emission from Shell-type Supernova Remnants: Predictions from Non-linear Shock Acceleration Models
• ASCA X-Ray Spectroscopy of LMC Supernova Remnants and the Metal Abundances of the LMC
• The Pulsar Wind Nebula Around PSR B1853+01 in the Supernova Remnant W44
• Very High Energy Gamma-Ray Astronomy
• The ASCA Catalog of Potential X-Ray Counterparts of GeV Sources
• The low frequency radio emission and spectrum of the extended SNR W44: new VLA observations at 74 and 324 MHz
• The X-ray Structure and Spectrum of the Pulsar Wind Nebula Surrounding PSR B1853+01 in W44
• Interpretation of the Center-Filled Emission from the Supernova Remnant W44
• Chandra Observations and Models of the Mixed-Morphology Supernova Remnant W44: Global Trends
• Core collapse supernova remnants with ears
• Supernova Remnants in the Magellanic Clouds. V. The Complex Interior Structure of the N206 SNR
• Evidence for a neutral iron line generated by MeV protons from supernova remnants interacting with molecular clouds
• X-ray Observation and Analysis of The Composite Supernova Remnant G327.1-1.1
• Numerical simulations of supernova remnants in turbulent molecular clouds
• APEX observations of supernova remnants - I. Non-stationary MHD-shocks in W44
• An X-ray study of the supernova remnant G18.95-1.1
• Discovery of a New X-ray Filled Radio Supernova Remnant Around the Pulsar Wind Nebula in 3EG J1809-2328
• Study of the Composite Supernova Remnant MSH 11-62
• The faint supernova remnant G 34.7-0.4 (W44)
• The pulsar wind nebula around B1853+01 in X-rays