TY - JOUR

T1 - The TRAPUM L-band survey for pulsars in Fermi-LAT gamma-ray sources

AU - Clark, C J

AU - Breton, R P

AU - Barr, E D

AU - Burgay, M

AU - Thongmeearkom, T

AU - Nieder, L

AU - Buchner, S

AU - Stappers, B

AU - Kramer, M

AU - Becker, W

AU - Mayer, M

AU - Phosrisom, A

AU - Ashok, A

AU - Bezuidenhout, M C

AU - Calore, F

AU - Cognard, I

AU - Freire, P C C

AU - Geyer, M

AU - Grießmeier, J-m

AU - Karuppusamy, R

AU - Levin, L

AU - Padmanabh, P V

AU - Possenti, A

AU - Ransom, S

AU - Serylak, M

AU - Venkatraman Krishnan, V

AU - Vleeschower, L

AU - Behrend, J

AU - Champion, D J

AU - Chen, W

AU - Horn, D

AU - Keane, E F

AU - Künkel, L

AU - Men, Y

AU - Ridolfi, A

AU - Dhillon, V S

AU - Marsh, T R

AU - Papa, M A

N1 - Funding Information: The MeerKAT telescope is operated by the South African Radio Astronomy Observatory, which is a facility of the National Research F oundation, an agenc y of the Department of Science and Inno vation. We thank staff at SARAO for their help with observations and commissioning. TRAPUM observations used the FBFUSE and AP- SUSE computing clusters for data acquisition, storage and analysis. These clusters were funded and installed by the Max-Planck-Institut für Radioastronomie (MPIfR) and the Max-Planck-Gesellschaft. The National Radio Astronomy Observatory is a facility of the National Science Foundation operated under cooperative agreement by Associated Universities, Inc. The Parkes radio telescope is part of the Australia Telescope National Facility ( https:// ror.org/ 05qajvd42 ) which is funded by the Australian Go v ernment for operation as a National Facility managed by CSIRO. We acknowledge the Wiradjuri people as the traditional owners of the Observatory site. The Nançay Radio Observatory is operated by the Paris Observatory, associated with the French Centre National de la Recherche Scientifique (CNRS) and Université d'Orléans. It is partially supported by the Region Centre Val de Loire in France. Partly based on observations with the 100-m telescope of the MPIfR at Effelsberg. The Fermi LAT Collaboration acknowledges generous ongoing support from a number of agencies and institutes that have supported both the development and the operation of the LAT as well as scientific data analysis. These include the National Aeronautics and Space Administration and the Department of Energy in the United States, the Commissariat `a l'Energie Atomique and the Centre National de la Recherche Scientifique/Institut National de Physique Nucléaire et de Physique des Particules in France, the Agenzia Spaziale Italiana and the Istituto Nazionale di Fisica Nucleare in Italy, the Ministry of Education, Culture, Sports, Science and Technology (MEXT), High Energy Accelerator Research Organization (KEK) and Japan Aerospace Exploration Agency (JAXA) in Japan, and the K. A. Wallenberg Foundation, the Swedish Research Council and the Swedish National Space Board in Sweden. Additional support for science analysis during the operations phase is gratefully acknowledged from the Istituto Nazionale di Astrofisica in Italy and the Centre National d'Etudes Spatiales in France. This work performed in part under DOE Contract DE-AC02-76SF00515. eROSITA is the primary instrument aboard SRG, a joint Russian- German science mission supported by the Russian Space Agency (Roskosmos), in the interests of the Russian Academy of Sciences represented by its Space Research Institute (IKI), and the Deutsches Zentrum für Luft- und Raumfahrt (DLR). The SRG spacecraft was b uilt by La v ochkin Association (NPOL) and its subcontractors, and is operated by NPOL with support from IKI and the Max Planck Institute for Extraterrestrial Physics (MPE). The development and construction of the eROSITA X-ray instrument was led by MPE, with contributions from the Dr. Karl Remeis Observatory Bamberg & ECAP (FAU Erlangen-Nürnberg), the University of Hamburg Observatory, the Leibniz Institute for Astrophysics Potsdam (AIP), and the Institute for Astronomy and Astrophysics of the University of Tübingen, with the support of DLR and the Max Planck Society. The Argelander Institute for Astronomy of the University of Bonn and the Ludwig Maximilians Universität Munich also participated in the science preparation for eROSITA. The eROSITA data shown here were processed using the ESASS/NRTA software system developed by the German eROSITA consortium. This research has made use of data or software obtained from the Gra vitational Wa ve Open Science Center ( gw-openscience.org ), a service of LIGO Laboratory, the LIGO Scientific Collaboration, the Virgo Collaboration, and KAGRA. LIGO Laboratory and Advanced LIGO are funded by the United States National Science Foundation (NSF) as well as the Science and Technology Facilities Council (STFC) of the United Kingdom, the Max-Planck-Society (MPS), and the State of Niedersachsen/Germany for support of the construction of Advanced LIGO and construction and operation of the GEO600 detector. Additional support for Advanced LIGO was provided by the Australian Research Council. Virgo is funded, through the European Gravitational Observatory (EGO), by the French Centre National de Recherche Scientifique (CNRS), the Italian Istituto Nazionale di Fisica Nucleare (INFN) and the Dutch Nikhef, with contributions by institutions from Belgium, Germany, Greece, Hungary, Ireland, Japan, Monaco, Poland, Portugal, Spain. The construction and operation of KAGRA are funded by Ministry of Education, Culture, Sports, Science and Technology (MEXT), and Japan Society for the Promotion of Science (JSPS), National Research Foundation (NRF) and Ministry of Science and ICT (MSIT) in Korea, Academia Sinica (AS) and the Ministry of Science and Technology (MoST) in Taiwan. This work has made use of data from the European Space Agency (ESA) mission Gaia ( ht tps://www.cosmos.esa.int /gaia ), processed by the Gaia Data Processing and Analysis Consortium (DPAC, https: // www.cosmos.esa.int/web/gaia/ dpac/consortium ). Funding for the DPAC has been provided by national institutions, in particular the institutions participating in the Gaia Multilateral Agreement. Based on observations collected at the European Southern Obser- vatory under ESO programmes 105.20RJ.001 and 105.20RJ.002. CJC and RPB acknowledge support from the European Research Council (ERC) under the European Union's Horizon 2020 research and innovation programme (grant agreement no. 715051; Spiders). BWS and MCB acknowledge funding from the ERC under the European Union's Horizon 2020 research and innovation programme (grant agreement no. 694745). MB, AP, and AR gratefully acknowl- edge financial support by the research grant 'iPeska' (P.I. Andrea Possenti) funded under the INAF national call Prin-SKA/CTA appro v ed with the Presidential Decree 70/2016. EDB, CJC, DJC, WC, MK, VVK, LN, PVP, and AR acknowledge continuing valuable support from the Max-Planck Society. LV acknowledges financial support from the Dean's Doctoral Scholar Award from the Univer- sity of Manchester. VSD, TRM, and ULTRACAM acknowledge the support of the STFC. SMR is a CIFAR Fellow and is sup- ported by the NSF Physics Frontiers Center awards 1430284 and 2020265.

PY - 2023/3

Y1 - 2023/3

N2 - More than 100 millisecond pulsars (MSPs) have been discovered in radio observations of gamma-ray sources detected by the Fermi Large Area Telescope (LAT), but hundreds of pulsar-like sources remain unidentified. Here, we present the first results from the targeted survey of Fermi-LAT sources being performed by the Transients and Pulsars with MeerKAT (TRAPUM) Large Survey Project. We observed 79 sources identified as possible gamma-ray pulsar candidates by a Random Forest classification of unassociated sources from the 4FGL catalogue. Each source was observed for 10 min on two separate epochs using MeerKAT's L-band receiver (856-1712 MHz), with typical pulsed flux density sensitivities of ∼ 100 μJy. Nine new MSPs were discovered, eight of which are in binary systems, including two eclipsing redbacks and one system, PSR J1526-2744, that appears to have a white dwarf companion in an unusually compact 5 h orbit. We obtained phase-connected timing solutions for two of these MSPs, enabling the detection of gamma-ray pulsations in the Fermi-LAT data. A follow-up search for continuous gravitational waves from PSR J1526-2744 in Advanced LIGO data using the resulting Fermi-LAT timing ephemeris yielded no detection, but sets an upper limit on the neutron star ellipticity of 2.45 × 10-8. We also detected X-ray emission from the redback PSR J1803-6707 in data from the first eROSITA all-sky survey, likely due to emission from an intrabinary shock.

AB - More than 100 millisecond pulsars (MSPs) have been discovered in radio observations of gamma-ray sources detected by the Fermi Large Area Telescope (LAT), but hundreds of pulsar-like sources remain unidentified. Here, we present the first results from the targeted survey of Fermi-LAT sources being performed by the Transients and Pulsars with MeerKAT (TRAPUM) Large Survey Project. We observed 79 sources identified as possible gamma-ray pulsar candidates by a Random Forest classification of unassociated sources from the 4FGL catalogue. Each source was observed for 10 min on two separate epochs using MeerKAT's L-band receiver (856-1712 MHz), with typical pulsed flux density sensitivities of ∼ 100 μJy. Nine new MSPs were discovered, eight of which are in binary systems, including two eclipsing redbacks and one system, PSR J1526-2744, that appears to have a white dwarf companion in an unusually compact 5 h orbit. We obtained phase-connected timing solutions for two of these MSPs, enabling the detection of gamma-ray pulsations in the Fermi-LAT data. A follow-up search for continuous gravitational waves from PSR J1526-2744 in Advanced LIGO data using the resulting Fermi-LAT timing ephemeris yielded no detection, but sets an upper limit on the neutron star ellipticity of 2.45 × 10-8. We also detected X-ray emission from the redback PSR J1803-6707 in data from the first eROSITA all-sky survey, likely due to emission from an intrabinary shock.

KW - binaries: general

KW - gamma rays: stars

KW - pulsars: general

KW - pulsars: individual: J1036-4353, J1526-2744, J1803-6707

UR - http://www.scopus.com/inward/record.url?scp=85160214704&partnerID=8YFLogxK

U2 - 10.48550/arXiv.2212.08528

DO - 10.48550/arXiv.2212.08528

M3 - Article

VL - 519

SP - 5590

EP - 5606

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

SN - 0035-8711

IS - 4

ER -