Enhanced pulsar and single pulse detection via automated radio frequency interference detection in multipixel feeds

Details Enhanced pulsar and single pulse detection via automated radio frequency interference detection in multipixel feeds Enhanced pulsar and single pulse detection via automated radio frequency interference detection in multipixel feeds

Feb 2012

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012mnras.420..271k&link_type=abstract

Monthly Notices of the Royal Astronomical Society, Volume 420, Issue 1, pp. 271-278.

Astronomy and Astrophysics

Astronomy

Instrumentation: Miscellaneous, Methods: Numerical, Pulsars: General

Scientific paper

Single pixel feeds on large aperture radio telescopes have the ability to detect weak (˜10 mJy) impulsive bursts of radio emission and sub-mJy radio pulsars. Unfortunately, in large-scale blind surveys, radio frequency interference (RFI) mimics both radio bursts and radio pulsars, greatly reducing the sensitivity to new discoveries as real signals of astronomical origin get lost among the millions of false candidates. In this paper a technique that takes advantage of multipixel feeds to use eigenvector decomposition of common signals is used to greatly facilitate radio burst and pulsar discovery. Since the majority of RFI occurs with zero dispersion, the method was tested on the total power present in the 13 beams of the Parkes multibeam receiver using data from archival intermediate-latitude surveys. The implementation of this method greatly reduced the number of false candidates and led to the discovery of one new rotating radio transient or RRAT, six new pulsars and five new pulses that shared the swept-frequency characteristics similar in nature to the `Lorimer burst'. These five new signals occurred within minutes of 11 previous detections of a similar type. When viewed together, they display temporal characteristics related to integer seconds, with non-random distributions and characteristic 'gaps' between them, suggesting they are not from a naturally occurring source. Despite the success in removing RFI, false candidates present in the data that are only visible after integrating in time or at non-zero dispersion remained. It is demonstrated that with some computational penalty, the method can be applied iteratively at all trial dispersions and time resolutions to remove the vast majority of spurious candidates.

Affiliated with

Also associated with

No associations

Rating

Enhanced pulsar and single pulse detection via automated radio frequency interference detection in multipixel feeds 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 Enhanced pulsar and single pulse detection via automated radio frequency interference detection in multipixel feeds, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Enhanced pulsar and single pulse detection via automated radio frequency interference detection in multipixel feeds will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1365836