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Related papers: A new perspective on GCRT J1745-3009

200 papers

Discovered in 2011 with LOFAR, the $15$ Jy low-frequency radio transient ILT J225347+862146 heralds a potentially prolific population of radio transients at $<100$ MHz. However, subsequent transient searches in similar parameter space…

High Energy Astrophysical Phenomena · Physics 2022-02-04 Yuping Huang , Marin M. Anderson , Gregg Hallinan , T. Joseph W. Lazio , Danny C. Price , Yashvi Sharma

We have measured dramatic flux and spectral variations through the 0.193d orbit of the optical counterpart of the unidentified gamma-ray source 0FGL J2339.8-0530. This compact object companion is strongly heated, with T_eff varying from…

High Energy Astrophysical Phenomena · Physics 2015-06-03 Roger W. Romani , Michael S. Shaw

Radio transient searches using traditional variability metrics struggle to recover sources whose evolution timescale is significantly longer than the survey cadence. Motivated by the recent observations of slowly evolving radio afterglows…

High Energy Astrophysical Phenomena · Physics 2023-06-16 James K. Leung , Tara Murphy , Emil Lenc , Philip G. Edwards , Giancarlo Ghirlanda , David L. Kaplan , Andrew O'Brien , Ziteng Wang

In a radio search with the Green Bank Telescope of three unidentified low Galactic latitude Fermi-LAT sources, we have discovered the middle-aged pulsar J2030+3641, associated with 1FGL J2030.0+3641 (2FGL J2030.0+3640). Following the…

PSR J1819-1458 is a rotating radio transient (RRAT) source with an inferred surface dipole magnetic field strength of 5e13 G and a 4.26-s spin period. We present XMM-Newton observations of the X-ray counterpart of this source, CXOU…

We present 1.25 GHz observations of the rotating radio transient (RRAT) J2325-0530, conducted with the Five-hundred-meter Aperture Spherical radio Telescope (FAST). Approximately 60% of detected single pulses occur in clusters of 2 to 5…

High Energy Astrophysical Phenomena · Physics 2025-09-19 Shi-Jie Gao , Xiang-Dong Li , Zhen Yan , Yi-Xuan Shao , Ping Zhou

In the last few years Fermi and AGILE observations have indicated the existence of a possible population of transient MeV-GeV sources located on the Galactic plane and characterized by fast flares lasting only a very few days. Notably, no…

High Energy Astrophysical Phenomena · Physics 2011-12-23 V. Sguera , A. Bazzano , A. J. Bird , S. P. Drave

We continued the search for single pulses (SPs) in the northern part of the all-sky High Time Resolution Universe survey, whose aim is to detect pulsars and other radio transients. This search is now about 21% complete and has yielded the…

High Energy Astrophysical Phenomena · Physics 2026-04-13 L. J. M. Houben , H. Falcke , L. G. Spitler , E. D. Barr , M. Berezina , D. J. Champion , R. Karuppusamy , M. Kramer

We present a Chandra/ACIS-I observation of GRO J1744-28. We detected a source at a position of R.A = 17h 44m 33.09s and Dec. = -28degr 44' 27.0'' (J2000.0; with a 1sigma error of ~0.8 arcseconds), consistent with both ROSAT and…

Astrophysics · Physics 2009-11-07 Rudy Wijnands , Q. Daniel Wang

The EGRET catalogue of unidentified X-ray sources has more objects along the galactic disk than at high galactic latitude, where identifications are comparatively easier. On the other hand, the Egret/GRO mission has already identified…

Astrophysics · Physics 2009-10-30 P. A. Caraveo , G. F. Bignami

We present a study of the unidentified gamma-ray source 3EG J0542+2610. This source is spatially superposed to the supernova remnant G180.0-1.7, but its time variability makes unlikely a physical link. We have searched into the EGRET…

Astrophysics · Physics 2009-11-06 Gustavo E. Romero , M. M. Kaufman Bernado , Jorge A. Combi , Diego F. Torres

Although originally discovered as a radio-quiet gamma-ray pulsar, J1732-3131 has exhibited intriguing detections at decameter wavelengths. We report an extensive follow-up of the pulsar at 327 MHz with the Ooty radio telescope. Using the…

High Energy Astrophysical Phenomena · Physics 2017-08-09 Yogesh Maan , M. A. Krishnakumar , Arun K. Naidu , Subhashis Roy , Bhal Chandra Joshi , Matthew Kerr , P. K. Manoharan

In the 4FGL-DR4 point-source catalog of the Large Area Telescope (LAT) onboard NASA's Fermi Gamma-ray Observatory (Fermi-LAT), around a third of the sources are still unidentified (unIDs). In this work, we perform a detailed study of one of…

We report the first detection of radio emission from any anomalous X-ray pulsar (AXP). Data from the Very Large Array (VLA) MAGPIS survey with angular resolution 6" reveals a point-source of flux density 4.5 +/- 0.5 mJy at 1.4 GHz at the…

Astrophysics · Physics 2009-11-13 J. P. Halpern , E. V. Gotthelf , R. H. Becker , D. J. Helfand , R. L. White

Recently, DeLaunay et al. (2016) discovered a gamma-ray transient, Swift J0644.5-5111, associated with the fast radio burst (FRB) 131104. They also reported follow-up broadband observations beginning two days after the FRB and provided…

High Energy Astrophysical Phenomena · Physics 2016-12-06 Z. G. Dai , J. S. Wang , X. F. Wu

Using the Green Bank Telescope (GBT) and Pulsar Spigot at 350MHz, we have surveyed the Northern Galactic Plane for pulsars and radio transients. This survey covers roughly 1000 square degrees of sky within 75 deg < l < 165 deg and |b| < 5.5…

We present the longest-term timing study so far of three Rotating Radio Transients (RRATs) - J1819-1458, J1840-1419 and J1913+1330 - performed using the Lovell, Parkes and Green Bank telescopes over the past decade. We study long-term and…

High Energy Astrophysical Phenomena · Physics 2018-04-25 B. Bhattacharyya , A. G. Lyne , B. W. Stappers , P. Weltevrede , E. F. Keane , M. A. McLaughlin , M. Kramer , C. Jordan , C. Bassa

We report on two optical candidates for the counterpart to an X-ray source in the SMC, 1WGA J0053.8-7226, identified as a serendipitous X-ray source from the ROSAT PSPC archive, and also observed by the Einstein IPC. Its X-ray properties,…

Rotating Radio Transients (RRATs) are neutron stars that emit sporadic radio bursts. We detected 1955 single pulses from RRAT J1913+1330 using the 19-beam receiver of the Five-hundred-meter Aperture Spherical Radio Telescope (FAST). These…

The origin of the high-frequency radio emission detected from several magnetars is poorly understood. In this paper, we report the ~40 GHz properties of SGR J1745-29 as measured using Jansky Very Large Array (JVLA) and Robert C. Byrd Green…

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