Long-Term Time Variability in the X-Ray Pulse Shape of the Crab Nebula Pulsar

Details Long-Term Time Variability in the X-Ray Pulse Shape of the Crab Nebula Pulsar Long-Term Time Variability in the X-Ray Pulse Shape of the Crab Nebula Pulsar

Jan 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000stin...0020415f&link_type=abstract

Technical Report, Smithsonian Astrophysical Observatory Cambridge, MA United States

Computer Science

Performance

Crab Nebula, Pulsars, Variability, Pulse Amplitude, X Ray Timing Explorer

Scientific paper

This is the final performance report for our grant 'Long-Term Time Variability in the X-Ray Pulse Shape of the Crab Nebula Pulsar.' In the first year of this grant, we received the 50,000-second ROSAT (German acronym for X-ray satellite) High Resolution Images (HRI) observation of the Crab Nebula pulsar. We used the data to create a 65-ms-resolution pulse profile and compared it to a similar pulse profile obtained in 1991. No statistically significant differences were found. These results were presented at the January 1998 meeting of the American Astronomical Society. Since then, we have performed more sensitive analyses to search for potential changes in the pulse profile shape between the two data sets. Again, no significant variability was found. In order to augment this long (six-year) baseline data set, we have analyzed archival observations of the Crab Nebula pulsar with the Rossi X-Ray Timing Explorer (RXTE). While these observations have shorter time baselines than the ROSAT data set, their higher signal-to-noise offers similar sensitivity to long-term variability. Again, no significant variations have been found, confirming our ROSAT results. This work was done in collaboration with Prof. Stephen Eikenberry, Cornell University. These analyses will be included in Cornell University graduate student Dae-Sik Moon's doctoral thesis.

Affiliated with

Also associated with

No associations

Rating

Long-Term Time Variability in the X-Ray Pulse Shape of the Crab Nebula Pulsar 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 Long-Term Time Variability in the X-Ray Pulse Shape of the Crab Nebula Pulsar, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Long-Term Time Variability in the X-Ray Pulse Shape of the Crab Nebula Pulsar will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-811581