J/ApJ/910/160ivo://CDS.VizieR/J/ApJ/910/160doi:10.26093/cds/vizier.19100160CDSBhattacharyya B.Roy J.Johnson T.J.Ray P.S.Freire P.C.C.Gupta Y.,Bhattacharya D.Kaninghat A.Stappers B.W.Ferrara E.C.Sengupta S.,Rathour R.S.Kerr M.Smith D.A.Parkinson P.M.S.Ransom S.M.,Michelson P.F.2022-11-09T06:19:36Z2022-10-25T12:01:27ZCDS support team

CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France

cds-question@unistra.frpulsarsgamma-ray-astronomyradio-sourcesWe performed deep observations to search for radio pulsations in the directions of 375 unassociated Fermi Large Area Telescope {gamma}-ray sources using the Giant Metrewave Radio Telescope (GMRT) at 322 and 607MHz. 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 ~5yr with the GMRT and derived phase-coherent timing models for these MSPs. PSR J0248+4230 and J1207-5050 are isolated MSPs having periodicities of 2.60ms and 4.84ms. PSR J1536-4948 is a 3.07ms pulsar in a binary system with an orbital period of ~62 days about a companion of a minimum mass of 0.32M_{sun}_. We also present multifrequency 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 ~11.6yr of {gamma}-ray pulse times of arrival (TOAs) along with the radio TOAs. PSR J1536-4948 also shows evidence for pulsed {gamma}-ray emission out to above 25GeV, confirming earlier associations of this MSP with a >=10GeV point source. The multiwavelength pulse profiles of all three MSPs offer challenges to models of radio and {gamma}-ray emission in pulsar magnetospheres.2021ApJ...910..160Bhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/910/160CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toB/psr : ATNF Pulsar Catalogue (Manchester+, 2005)J/ApJS/188/405 : Fermi-LAT first source catalog (1FGL) (Abdo+, 2010)J/ApJ/753/83 : Associations to 1FGL sources (Ackermann+, 2012)J/ApJS/199/31 : Fermi LAT second source catalog (2FGL) (Nolan+, 2012)J/ApJS/208/17 : 2nd Fermi LAT cat. of gamma-ray pulsars (2PC) (Abdo+, 2013)J/ApJS/209/34 : The first Fermi-LAT >10GeV catalog (1FHL) (Ackermann+, 2013)J/ApJS/232/18 : The third Fermi-LAT >10GeV catalog (3FHL) (Ajello+, 2017)J/ApJS/247/33 : The Fermi LAT fourth source catalog (4FGL) (Abdollahi+, 2020)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/910/160https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/910/160http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/910/160https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/910/160https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/910/160http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/910/160GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/910/160/table4 (Summary of the GMRT observations)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/910/160/table4?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/910/160/table4?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/910/160/table4?GETtext/xml+votable180.050000true350.7595833-49.32166670.0055555555555555566/428 1054 1231 1263 1343 1538 1542 1544 1768 1957 1965 2030 2042 2396 2754 2991 3099 3130 3207 3234 3287 3366 3382 3419 3441 3465 3700 3759 3871 3894 3945 4088 5353 7623 8302 8439 8571 9459 9965 10546 11351 12113 13278 13302 13929 13960 14654 14690 14904 15415 15486 15667 15669 15688 15701 15703 15733 15783 15996 16534 16693 16816 16821 16981 17186 17341 18435 19202 19332 19546 20099 20552 20735 21073 21358 21394 21430 21439 22239 22249 22305 22855 22864 22876 22881 23105 23227 23364 23563 24188 24318 24444 24554 24836 25142 25245 25760 26677 27248 28350 28506 28702 28748 28754 28821 28837 28839 29207 29213 29322 29514 29547 29607 29612 29615 29657 29670 29679 29794 29810 29881 29952 30196 30278 30301 30341 30783 30979 30981 30991 30995 30999 31003 31093 31101 31109 31116 31239 31316 31720 31796 31856 31860 32035 32087 32139 32249 32531 32628 32712 34107 34772 35333 35441 35498 36144 36615 36716 37861-37862 38277 38305 38488 38873 39111 39266 39543 39733 39974 39978 40092 40113 40351 40354 40402 40680 41837 41908 41964 42143 42170 42181 42335 42369 42530 42545 42583 42596 42744 42830 42981 42993 43003 43227 43253 43265 43319 43366 43596 43632 43643 43660 43862 44241 44255 44302 44585 44704 44777 45011 46057 46060 46337 46370 46373 46445 46534 46723 47066 47398 47487 47534 47714 47742 48227 48256 48868 48951 48962 48995 49068https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/910/160?format=asciiGamma-rayRadiodefaultJ/ApJ/910/160/table4Summary of the GMRT observationsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIDSource designationmeta.id;meta.maincharRAJ2000Hour of right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Degree of declination (J2000)pos.eq.dec;meta.mainMJD[55521.59/56552.14] Observing epoch (MJD)dtime.epochdoubleFreq[322/607] Observed frequencyMHzem.freqintDur[3/150] Durationmintime.durationintSmin[0.2/4.9] 10{sigma} detection limit (1)mJyphot.flux.density;em.radiofloatLATDisplay data from 1FGL (Abdo+, 2010, J/ApJS/188/405) and 2FGL (Nolan+, 2012, J/ApJS/199/31) within 3.5'meta.ref.urlintnullable