KNOWN PULSARS IDENTIFIED in the GMRT 150 MHz ALL-SKY SURVEY
We have used the 150 MHz radio continuum survey (TGSS ADR) from the Giant Metrewave Radio Telescope (GMRT) to search for phase-averaged emission toward all well-localized radio pulsars north of -53° decl. We detect emission toward 200 pulsars with high confidence (=5s) and another 88 pulsars at fain...
| Main Authors: | , , , |
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| Format: | Journal Article |
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Institute of Physics Publishing
2016
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| Online Access: | http://hdl.handle.net/20.500.11937/74310 |
| _version_ | 1848763238642089984 |
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| author | Frail, D. Jagannathan, P. Mooley, K. Intema, Hubertus |
| author_facet | Frail, D. Jagannathan, P. Mooley, K. Intema, Hubertus |
| author_sort | Frail, D. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | We have used the 150 MHz radio continuum survey (TGSS ADR) from the Giant Metrewave Radio Telescope (GMRT) to search for phase-averaged emission toward all well-localized radio pulsars north of -53° decl. We detect emission toward 200 pulsars with high confidence (=5s) and another 88 pulsars at fainter levels. We show that most of our identifications are likely from pulsars, except for a small number where the measured flux density is confused by an associated supernova or pulsar-wind nebula, or a globular cluster. We investigate the radio properties of the 150 MHz sample and find an unusually high number of gamma-ray binary millisecond pulsars with very steep spectral indices. We also note a discrepancy in the measured flux densities between GMRT and LOFAR pulsar samples, suggesting that the flux density scale for the LOFAR pulsar sample may be in error by approximately a factor of two. We carry out a separate search of 30 well-localized gamma-ray, radio-quiet pulsars in an effort to detect a widening of the radio beam into the line of sight at lower frequencies. No steep-spectrum emission was detected either toward individual pulsars or in a weighted stack of all 30 images. |
| first_indexed | 2025-11-14T11:00:17Z |
| format | Journal Article |
| id | curtin-20.500.11937-74310 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T11:00:17Z |
| publishDate | 2016 |
| publisher | Institute of Physics Publishing |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-743102019-07-22T05:22:24Z KNOWN PULSARS IDENTIFIED in the GMRT 150 MHz ALL-SKY SURVEY Frail, D. Jagannathan, P. Mooley, K. Intema, Hubertus We have used the 150 MHz radio continuum survey (TGSS ADR) from the Giant Metrewave Radio Telescope (GMRT) to search for phase-averaged emission toward all well-localized radio pulsars north of -53° decl. We detect emission toward 200 pulsars with high confidence (=5s) and another 88 pulsars at fainter levels. We show that most of our identifications are likely from pulsars, except for a small number where the measured flux density is confused by an associated supernova or pulsar-wind nebula, or a globular cluster. We investigate the radio properties of the 150 MHz sample and find an unusually high number of gamma-ray binary millisecond pulsars with very steep spectral indices. We also note a discrepancy in the measured flux densities between GMRT and LOFAR pulsar samples, suggesting that the flux density scale for the LOFAR pulsar sample may be in error by approximately a factor of two. We carry out a separate search of 30 well-localized gamma-ray, radio-quiet pulsars in an effort to detect a widening of the radio beam into the line of sight at lower frequencies. No steep-spectrum emission was detected either toward individual pulsars or in a weighted stack of all 30 images. 2016 Journal Article http://hdl.handle.net/20.500.11937/74310 10.3847/0004-637X/829/2/119 Institute of Physics Publishing fulltext |
| spellingShingle | Frail, D. Jagannathan, P. Mooley, K. Intema, Hubertus KNOWN PULSARS IDENTIFIED in the GMRT 150 MHz ALL-SKY SURVEY |
| title | KNOWN PULSARS IDENTIFIED in the GMRT 150 MHz ALL-SKY SURVEY |
| title_full | KNOWN PULSARS IDENTIFIED in the GMRT 150 MHz ALL-SKY SURVEY |
| title_fullStr | KNOWN PULSARS IDENTIFIED in the GMRT 150 MHz ALL-SKY SURVEY |
| title_full_unstemmed | KNOWN PULSARS IDENTIFIED in the GMRT 150 MHz ALL-SKY SURVEY |
| title_short | KNOWN PULSARS IDENTIFIED in the GMRT 150 MHz ALL-SKY SURVEY |
| title_sort | known pulsars identified in the gmrt 150 mhz all-sky survey |
| url | http://hdl.handle.net/20.500.11937/74310 |