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We report our detailed data analysis for 39 $\gamma$-ray sources selected from the 992 unassociated sources in the \textit{Fermi} Large Area Telescope (LAT) third source catalog. The selection criteria, which were set for finding candidate…

High Energy Astrophysical Phenomena · Physics 2021-06-03 Xuejie Dai , Zhongxiang Wang , V. Jithesh , Yi Xing

4FGL J0935.5+0901, a $\gamma$-ray source recently identified as a candidate redback-type millisecond pulsar binary (MSP), shows an interesting feature of having double-peaked emission lines in its optical spectrum. The feature would further…

High Energy Astrophysical Phenomena · Physics 2022-02-16 Dong Zheng , Zhong-Xiang Wang , Yi Xing , Jithesh Vadakkumthani

We present the first X-ray observations of three recently discovered millisecond pulsars (MSPs) with interesting characteristics: PSR J0337+1715, PSR J0636+5129, and PSR J0645+5158. PSR J0337+1715 is a fast-spinning, bright, and so-far…

We have discovered six radio millisecond pulsars (MSPs) in a search with the Arecibo telescope of 34 unidentified gamma-ray sources from the Fermi Large Area Telescope (LAT) 4-year point source catalog. Among the 34 sources, we also…

High Energy Astrophysical Phenomena · Physics 2016-03-16 H. T. Cromartie , F. Camilo , M. Kerr , J. S. Deneva , S. M. Ransom , P. S. Ray , E. C. Ferrara , P. F. Michelson , K. S. Wood

The Fermi catalogue contains about 2000 unassociated $\gamma$-ray sources. Some of them were recently identified as pulsars, including so called redbacks and black widows, which are millisecond pulsars in tight binary systems with non- and…

High Energy Astrophysical Phenomena · Physics 2023-07-06 A. V. Karpova , D. A. Zyuzin , Yu. A. Shibanov , M. R. Gilfanov

About one third of the 3033 $\gamma$-ray sources in the Third Fermi-LAT Gamma-ray Source Catalogue (3FGL) are unidentified and do not have even a tentative association with a known object, hence they are defined as unassociated. Among…

High Energy Astrophysical Phenomena · Physics 2017-06-28 D. Salvetti , R. P. Mignani , A. De Luca , M. Marelli , C. Pallanca , A. A. Breeveld , P. Husemann , A. Belfiore , W. Becker , J. Greiner

Observations of millisecond pulsars (MSPs) at low radio frequencies play an important role in understanding the Galactic pulsar population and characterising both their emission properties and the effects of the ionised interstellar medium…

High Energy Astrophysical Phenomena · Physics 2025-08-15 C. P. Lee , N. D. R. Bhat , B. W. Meyers , S. J. McSweeney , W. van Straten , C. M. Tan , M. Xue , N. A. Swainston , S. M. Ord , G. Sleap , S. E. Tremblay , A. Williams

Binary millisecond pulsars with a massive white dwarf (WD) companion are intermediate-mass binary pulsars (IMBPs). They are formed via the Case BB Roche-lobe overflow evolution channel if they are in compact orbits with an orbital period of…

High Energy Astrophysical Phenomena · Physics 2025-02-03 Z. L. Yang , J. L. Han , T. Wang , P. F. Wang , W. Q. Su , W. C. Chen , C. Wang , D. J. Zhou , Y. Yan , W. C. Jing , N. N. Cai , L. Xie , J. Xu , H. G. Wang , R. X. Xu

Milli-second pulsars (MSPs) are rapidly spinning neutron stars, with spin periods P_s <= 10 ms, which have been most likely spun up after a phase of matter accretion from a companion star. In this work we present the results of the search…

High Energy Astrophysical Phenomena · Physics 2015-09-30 V. Testa , R. P. Mignani , C. Pallanca , A. Corongiu , F. R. Ferraro

We report the discovery of the millisecond pulsar (MSP) PSR J1950+2414 ($P=4.3$ ms) in a binary system with an eccentric ($e=0.08$) 22-day orbit in Pulsar ALFA survey observations with the Arecibo telescope. Its companion star has a median…

We have discovered five millisecond pulsars (MSPs) in a survey of 14 unidentified Fermi-LAT sources in the southern sky using the Parkes radio telescope. PSRs J0101-6422, J1514-4946, and J1902-5105 reside in binaries, while PSRs J1658-5324…

We present the discovery of 5 millisecond pulsars found in the mid-Galactic latitude portion of the High Time Resolution Universe (HTRU) Survey. The pulsars have rotational periods from ~2.3 to ~7.5 ms, and all are in binary systems with…

We present a catalog of periodic stellar variability in the "Stripe 82" region of the Sloan Digital Sky Survey (SDSS). After aggregating and recalibrating catalog-level data from the survey, we ran a period-finding algorithm (Supersmoother)…

Solar and Stellar Astrophysics · Physics 2015-05-27 A. C. Becker , J. J. Bochanski , S. L. Hawley , Ž Ivezić , A. F Kowalski , B. Sesar , A. A. West

This paper presents the discovery and timing parameters for five millisecond pulsars (MSPs), four in binary systems with probable white dwarf companions and one isolated, found in ongoing processing of the High Time Resolution Universe…

It is believed that the radio pulsars rotating at spin periods of about 30 millisecond or even lower got such high spins through the transfer of angular momentum by accreting matter from their binary companions (or past companions) in the…

High Energy Astrophysical Phenomena · Physics 2025-07-28 Arpita Choudhary

We present a catalogue of 1602 white dwarf-main sequence binaries (WDMS) from the spectroscopic Sloan Digital Sky Survey Data Release 6 (SDSS DR6). Among these we identify 440 as new WDMS binaries. We select WDMS binary candidates from…

Solar and Stellar Astrophysics · Physics 2015-05-14 A. Rebassa-Mansergas , B. T. Gaensicke , M. R. Schreiber , D. Koester , P. Rodriguez-Gil

Spider pulsars are binary systems composed of a millisecond pulsar and a low-mass companion. Their X-ray emission, varying with orbital phase, originates from synchrotron radiation produced by high-energy electrons accelerated at the…

High Energy Astrophysical Phenomena · Physics 2025-01-16 Jorge Cortés , Lorenzo Sironi

MeerKAT imaging of the globular cluster 47 Tucanae (47 Tuc) reveals 1.28 GHz continuum emission at the locations of 20 known millisecond pulsars (MSPs). We use time series and spectral imaging to investigate the image-domain characteristics…

High Energy Astrophysical Phenomena · Physics 2023-07-19 Ian Heywood

We present an analysis of 745.6 ks of archival Chandra X-ray Observatory Advanced CCD Imaging Spectrometer data accumulated between 2000 and 2016 of the millisecond pulsar (MSP) population in the rich Galactic globular cluster Terzan 5.…

High Energy Astrophysical Phenomena · Physics 2021-05-19 Slavko Bogdanov , Arash Bahramian , Craig O. Heinke , Scott M. Ransom

Redback millisecond pulsars (hereafter redbacks) are a sub-population of eclipsing millisecond pulsars in close binaries. The formation processes of these systems are not clear. The three pulsars showing transitions between rotation- and…

High Energy Astrophysical Phenomena · Physics 2015-10-26 Kun Jia , Xiang-Dong Li
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