A survey for pulsars in EGRET error boxes

Champion, D. J.; McLaughlin, M. A.; Lorimer, D. R.

doi:10.1111/j.1365-2966.2005.09660.x

Cited by 20 publications

(18 citation statements)

References 20 publications

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“…Observations of these sources at lower frequencies (300Y400 MHz) with modern, wide-bandwidth systems (50Y64 MHz) may be able to resolve these low DM and spectral index issues. However, a recent 327 MHz search of 19 midlatitude EGRET error boxes visible from the Arecibo telescope found no new pulsar counterparts (Champion et al 2005), lending support to the conclusion that pulsars are not powering the majority of these -ray sources.…”

Section: Discussionmentioning

confidence: 94%

A Survey of 56 Midlatitude EGRET Error Boxes for Radio Pulsars

Crawford

Roberts

Hessels

et al. 2006

ApJ

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We have conducted a radio pulsar survey of 56 unidentified -ray sources from the third EGRET catalog that are at intermediate Galactic latitudes (5 < jbj < 73 ). For each source, four interleaved 35 minute pointings were made with the 13 beam, 1400 MHz multibeam receiver on the Parkes 64 m radio telescope. This covered the 95% error box of each source at a limiting sensitivity of $0.2 mJy to pulsed radio emission for periods P k 10 ms and dispersion measures P50 pc cm À3. Roughly half of the unidentified -ray sources at jbj > 5 with no proposed active galactic nucleus counterpart were covered in this survey. We detected nine isolated pulsars and four recycled binary pulsars, with three from each class being new discoveries. Timing observations suggest that only one of the pulsars has a spin-down luminosity that is even marginally consistent with the inferred luminosity of its coincident EGRET source. Our results suggest that population models, which include the Gould Belt as a component, overestimate the number of isolated pulsars among the midlatitude Galactic -ray sources, and that it is unlikely that Gould Belt pulsars make up the majority of these sources. However, the possibility of steep pulsar radio spectra and the confusion of terrestrial radio interference with long-period pulsars (P k 200 ms) having very low dispersion measures (P10 pc cm À3, expected for sources at a distance of less than about 1 kpc) prevent us from strongly ruling out this hypothesis. Our results also do not support the hypothesis that millisecond pulsars make up the majority of these sources. Nonpulsar source classes should therefore be further investigated as possible counterparts to the unidentified EGRET sources at intermediate Galactic latitudes.

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Section: Discussionmentioning

confidence: 94%

A Survey of 56 Midlatitude EGRET Error Boxes for Radio Pulsars

Crawford

Roberts

Hessels

et al. 2006

ApJ

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“…None of these pulsars is likely to be energetic enough to be associated with their target EGRET sources [139]. While convincing EGRET associations with several young pulsars are now known [199], it is not clear whether millisecond pulsars are relevant to the energetics of these enigmatic sources [69]. Despite this lack of success, it is quite possible that the recent launches of the AGILE [152] and GLAST [271] gamma-ray observatories will provide further opportunities for follow-up.…”

Section: Pulsar Phenomenologymentioning

confidence: 99%

Binary and Millisecond Pulsars

Lorimer

2008

Living Rev. Relativ.

613

486

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We review the main properties, demographics and applications of binary and millisecond radio pulsars. Our knowledge of these exciting objects has greatly increased in recent years, mainly due to successful surveys which have brought the known pulsar population to over 1800. There are now 83 binary and millisecond pulsars associated with the disk of our Galaxy, and a further 140 pulsars in 26 of the Galactic globular clusters. Recent highlights include the discovery of the young relativistic binary system PSR J1906+0746, a rejuvination in globular cluster pulsar research including growing numbers of pulsars with masses in excess of 1.5 M⊙, a precise measurement of relativistic spin precession in the double pulsar system and a Galactic millisecond pulsar in an eccentric (e = 0.44) orbit around an unevolved companion.Electronic Supplementary MaterialSupplementary material is available for this article at 10.12942/lrr-2008-8.

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“…MSPs discovered at the GBT are shown in blue, while pulsars found with the GMRT are in green, Effelsberg in black, Parkes in red, and Nançay in magenta. PSR J1103−5403 is represented with a different symbol as it has been shown not to be associated with the LAT source in which it was found (Keith et al 2011). with limited success as searches were complicated by the large number of radio pointings required to cover a typical gamma-ray source (see for instance Champion et al 2005or Crawford et al 2006. In contrast, Fermi LAT sources are typically localized to within 10 due to the improved angular resolution (Nolan et al 2012).…”

Section: Radio Msp Discoveries In Fermi Sourcesmentioning

confidence: 99%

Radio counterparts of gamma-ray pulsars

Guillemot¹

2012

Proc. IAU

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Observations of pulsars with the Large Area Telescope (LAT) on the Fermi satellite have revolutionized our view of the gamma-ray pulsar population. For the first time, a large number of young gamma-ray pulsars have been discovered in blind searches of the LAT data. More generally, the LAT has discovered many new gamma-ray sources whose properties suggest that they are powered by unknown pulsars. Radio observations of gamma-ray sources have been key to the success of pulsar studies with the LAT. For example, radio observations of LAT-discovered pulsars provide constraints on the relative beaming fractions, which are crucial for pulsar population studies. Also, radio searches of LAT sources with no known counterparts have been very efficient, with the discovery of over forty millisecond pulsars. I review radio follow-up studies of LAT-discovered pulsars and unidentified sources, and discuss some of the implications of the results.Comment: Proceedings of IAUS 291 "Neutron Stars and Pulsars: Challenges and Opportunities after 80 years", J. van Leeuwen (ed.); 6 pages, 3 figure

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A survey for pulsars in EGRET error boxes

Cited by 20 publications

References 20 publications

A Survey of 56 Midlatitude EGRET Error Boxes for Radio Pulsars

A Survey of 56 Midlatitude EGRET Error Boxes for Radio Pulsars

Binary and Millisecond Pulsars

Radio counterparts of gamma-ray pulsars

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