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dc.contributor.authorBHATTACHARYYA, B.
dc.contributor.authorROY, J.
dc.contributor.authorJOHNSON, T.J.
dc.contributor.authorRAY, P.S.
dc.contributor.authorFREIRE, P.C.C.
dc.contributor.authorGUPTA, Y.
dc.contributor.authorBHATTACHARYA, D.
dc.contributor.authorKANINGHAT, A.
dc.contributor.authorSTAPPERS, B.W.
dc.contributor.authorFERRARA, E.C.
dc.contributor.authorSENGUPTA, S.
dc.contributor.authorRATHOUR, R.S.
dc.contributor.authorKERR, M.
hal.structure.identifierCentre d'Etudes Nucléaires de Bordeaux Gradignan [CENBG]
dc.contributor.authorSMITH, D.A.
dc.contributor.authorSAZ PARKINSON, P.M.
dc.contributor.authorRANSOM, S.M.
dc.contributor.authorMICHELSON, P.F.
dc.description.abstractEnWe 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.isoen
dc.title.enDiscovery and timing of three millisecond pulsars in radio and gamma-rays with the GMRT and Fermi-LAT
dc.typeDocument de travail - Pré-publication
dc.subject.halPhysique [physics]/Astrophysique [astro-ph]
dc.identifier.arxiv2102.04026
hal.identifierhal-03150568
hal.version1
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-03150568v1
bordeaux.COinSctx_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


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