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相关论文: ASCA Detection of Pulsed X-ray Emission from PSR J…

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We have detected significant X-ray emission from the direction of the young radio pulsar PSR J1105-6107 using the ASCA Observatory. The 11 sigma detection includes 460 background-subtracted source counts derived using data from all four…

天体物理学 · 物理学 2009-10-30 E. V. Gotthelf , V. M. Kaspi

The pulsar PSR J0631+1036 was discovered during a radio search of Einstein X-ray source error circles. A detection of a 288ms sinusoidal modulation in the ASCA lightcurve, the same period as the radio pulsar, appeared to confirm the…

天体物理学 · 物理学 2007-05-23 J. Kennea , F. Cordova , S. Chatterjee , J. Cordes , C. Ho , R. Much , T. Oosterbroek , A. Parmar

We have detected pulsed X-ray emission from the fastest millisecond pulsar known, PSR B1937+21 (P=1.558 msec), with ASCA. The pulsar is detected as a point source above $\sim 1.7$ keV, with no indication of nebulosity. The source flux in…

天体物理学 · 物理学 2009-11-06 M. Takahashi

The accretion-powered millisecond X-ray pulsar, SAX J1808.4-3658, was observed in quiescence with ASCA in September 1999. We detected a dim X-ray source in the SIS data at the position consistent to SAX J1808.4-3658. The source count rate…

天体物理学 · 物理学 2009-10-31 Tadayasu Dotani , Kazumi Asai , Rudy Wijnands

We performed timing and spectral analysis for PSR B1929+10, one of the oldest (about 10^7 years) of the ordinary pulsars detected in X-rays, using archival ROSAT, ASCA and RXTE data. Pulsed emission was detected at a more than five sigma…

天体物理学 · 物理学 2007-05-23 Agnieszka Wozna , Lucien Kuiper , Wim Hermsen

The new transient X-ray pulsar XTE J0111.2-7317 was observed with Advanced Satellite for Cosmology and Astrophysics (ASCA) on 1998 November 18, a few days after its discovery with the Proportional Counter Array onboard the Rossi X-ray…

We present X-ray observations of two young energetic radio pulsars, PSRs B1046-58 and B1610-50, and their surroundings, using archival data from the Advanced Satellite for Cosmology and Astrophysics (ASCA). The energetic pulsar PSR B1046-58…

天体物理学 · 物理学 2009-10-31 M. J. Pivovaroff , V. M. Kaspi , E. V. Gotthelf

PSR J0108-1431 is a nearby, 170 Myr old, very faint radio pulsar near the "pulsar death line" in the P-Pdot diagram. We observed the pulsar field with the Chandra X-ray Observatory and detected a point source (53 counts in a 30 ks exposure,…

天体物理学 · 物理学 2009-06-23 G. G. Pavlov , O. Kargaltsev , J. A. Wong , G. P. Garmire

We report the first detection of pulsed X-ray emission from the young, energetic radio and Gamma-ray pulsar PSR B1706-44. We find a periodic signal at a frequency of f = 9.7588088 +/- 0.0000026 Hz (at epoch 51585.34104 MJD), consistent with…

天体物理学 · 物理学 2009-11-07 E. V. Gotthelf , J. P. Halpern , R. Dodson

We report on a deep search for radio pulsations toward five unidentified ASCA X-ray sources coincident with EGRET gamma-ray sources. This search has led to the discovery of a young and energetic pulsar using data obtained with the new…

We report on the XMM-Newton observations of the 143 ms pulsar PSR J0538+2817. We present evidence for the first detections of pulsed X-rays from the source at a frequency which is consistent with the predicted radio frequency. The pulse…

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…

天体物理学 · 物理学 2009-11-13 J. P. Halpern , E. V. Gotthelf , R. H. Becker , D. J. Helfand , R. L. White

A new pulsating X-ray source, AX J183220-0840, with a 1549.1-s period was discovered at R.A.= 18h32m20s and Dec.=-8d40'30'' (J2000, uncertainty=0.6degree) during an ASCA observation on the Galactic plane. The source was observed two times,…

天体物理学 · 物理学 2009-10-31 M. Sugizaki , K. Kinugasa , K. Matsuzaki , Y. Terada , S. Yamauchi , J. Yokogawa

We observed the pulsar PSR J1648-4611 with Suzaku. Two X-ray sources, Suzaku J1648-4610 (Src A) and Suzaku J1648-4615 (Src B), were found in the field of view. Src A is coincident with the pulsar PSR J1648-4611, which was also detected by…

高能天体物理现象 · 物理学 2015-06-12 Michito Sakai , Hironori Matsumoto , Yoshito Haba , Yasufumi Kanou , Youhei Miyamoto

We report the detection using ASCA data of a hard X-ray source in the vicinity of the radio pulsar PSR B1853+01 which is located within the supernova remnant (SNR) W44. PSR B1853+01, a 267ms pulsar, has to date only been detected in the…

天体物理学 · 物理学 2009-10-28 Ilana M. Harrus , John P. Hughes , David J. Helfand

The discovery of coherent pulsations with ASCA from an X-ray source, AX J0049.5-7323, is reported. The barycentric period was determined to be 755.5 +/- 0.6 s, which is the longest among X-ray pulsators in the SMC. The X-ray spectrum has…

天体物理学 · 物理学 2015-06-24 Jun Yokogawa , Kensuke Imanishi , Masaru Ueno , Katsuji Koyama

We report the discovery of gamma-ray pulsations from the nearby isolated millisecond pulsar PSR J0030+0451 with the Large Area Telescope (LAT) on the \emph{Fermi} Gamma-ray Space Telescope (formerly GLAST). This discovery makes PSR…

高能天体物理现象 · 物理学 2009-07-22 LAT Collaboration

ASCA observed the central region of the Small Magellanic Cloud, and found a hard X-ray source, AX J0051-733, at the position of the ROSAT source RX J0050.8-7316, which has an optical counterpart of a Be star. Coherent X-ray pulsations of…

天体物理学 · 物理学 2015-06-24 Kensuke Imanishi , Jun Yokogawa , Masahiro Tsujimoto , Katsuji Koyama

We report on the discovery of a transient X-ray pulsar, AX J1841.0-0536, serendipitously found in the Scutum arm region with the ASCA in two separate observations. The X-ray flux is very faint at the beginning, but exhibits two flares in…

天体物理学 · 物理学 2015-06-24 Aya Bamba , Jun Yokogawa , Masaru Ueno , Katsuji Koyama , Shigeo Yamauchi

We report the discovery of pulsed {\gamma}-ray emission and X-ray emission from the black widow millisecond pulsar PSR J2051-0827 by using the data from the Large Area Telescope (LAT) on board the Fermi Gamma-ray Space Telescope and the…

高能天体物理现象 · 物理学 2015-06-03 J. H. K. Wu , A. K. H. Kong , R. H. H. Huang , J. Takata , P. H. T. Tam , E. M. H. Wu , K. S. Cheng
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