Discovery and timing of three millisecond pulsars in radio and gamma-rays with the GMRT and Fermi-LAT
| dc.contributor.author | BHATTACHARYYA, B. | |
| dc.contributor.author | ROY, J. | |
| dc.contributor.author | JOHNSON, T.J. | |
| dc.contributor.author | RAY, P.S. | |
| dc.contributor.author | FREIRE, P.C.C. | |
| dc.contributor.author | GUPTA, Y. | |
| dc.contributor.author | BHATTACHARYA, D. | |
| dc.contributor.author | KANINGHAT, A. | |
| dc.contributor.author | STAPPERS, B.W. | |
| dc.contributor.author | FERRARA, E.C. | |
| dc.contributor.author | SENGUPTA, S. | |
| dc.contributor.author | RATHOUR, R.S. | |
| dc.contributor.author | KERR, M. | |
| hal.structure.identifier | Centre d'Etudes Nucléaires de Bordeaux Gradignan [CENBG] | |
| dc.contributor.author | SMITH, D.A. | |
| dc.contributor.author | SAZ PARKINSON, P.M. | |
| dc.contributor.author | RANSOM, S.M. | |
| dc.contributor.author | MICHELSON, P.F. | |
| dc.description.abstractEn | We performed deep observations to search for radio pulsations in the directions of 375 unassociated Fermi Large Area Telescope (LAT) gamma-ray sources using the Giant Metrewave Radio Telescope (GMRT) at 322 and 607 MHz. In this paper we report the discovery of three millisecond pulsars (MSPs), PSR J0248+4230, PSR J1207$-$5050 and PSR J1536$-$4948. We conducted follow up timing observations for around 5 years with the GMRT and derived phase coherent timing models for these MSPs. PSR J0248$+$4230 and J1207$-$5050 are isolated MSPs having periodicities of 2.60 ms and 4.84 ms. PSR J1536-4948 is a 3.07 ms pulsar in a binary system with orbital period of around 62 days about a companion of minimum mass 0.32 solar mass. We also present multi-frequency pulse profiles of these MSPs from the GMRT observations. PSR J1536-4948 is an MSP with an extremely wide pulse profile having multiple components. Using the radio timing ephemeris we subsequently detected gamma-ray pulsations from these three MSPs, confirming them as the sources powering the gamma-ray emission. For PSR J1536-4948 we performed combined radio-gamma-ray timing using around 11.6 years of gamma-ray pulse times of arrivals (TOAs) along with the radio TOAs. PSR J1536-4948 also shows evidence for pulsed gamma-ray emission out to above 25 GeV, confirming earlier associations of this MSP with a >10 GeV point source. The multi-wavelength pulse profiles of all three MSPs offer challenges to models of radio and gamma-ray emission in pulsar magnetospheres. | |
| dc.language.iso | en | |
| dc.title.en | Discovery and timing of three millisecond pulsars in radio and gamma-rays with the GMRT and Fermi-LAT | |
| dc.type | Document de travail - Pré-publication | |
| dc.subject.hal | Physique [physics]/Astrophysique [astro-ph] | |
| dc.identifier.arxiv | 2102.04026 | |
| hal.identifier | hal-03150568 | |
| hal.version | 1 | |
| hal.origin.link | https://hal.archives-ouvertes.fr//hal-03150568v1 | |
| bordeaux.COinS | ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.au=BHATTACHARYYA,%20B.&ROY,%20J.&JOHNSON,%20T.J.&RAY,%20P.S.&FREIRE,%20P.C.C.&rft.genre=preprint |
Files in this item
| Files | Size | Format | View |
|---|---|---|---|
|
There are no files associated with this item. |
|||