Discovery of a Transient Magnetar: XTE J1810-197
نویسندگان
چکیده
منابع مشابه
X-ray Bursts from the Transient Magnetar Candidate Xte J1810−197
We have discovered four X-ray bursts, recorded with the Rossi X-ray Timing Explorer Proportional Counter Array between 2003 September and 2004 April, that we show to originate from the transient magnetar candidate XTE J1810−197. The burst morphologies consist of a short spike or multiple spikes lasting ∼1 s each followed by extended tails of emission where the pulsed flux from XTE J1810−197 is ...
متن کاملThe Magnetar Xte J1810–197: Variations in Torque, Radio Flux Density and Pulse Profile Morphology
We report on observations of the radio-emitting anomalous X-ray pulsar XTE J1810–197 during 2006 May– October using the Nançay, Parkes, GBT, and VLA telescopes at a frequency of 1.4 GHz. The torque experienced by the neutron star during this period, as inferred from a measurement of its rotational frequency derivative, decreased by 30%, although not in a steady manner. We have also observed ver...
متن کاملInfrared and X–ray Variability of the Transient Anomalous X-ray Pulsar Xte J1810-197 ⋆
We report on observations aimed at searching for flux variations from the proposed IR counterpart of the Anomalous X–ray Pulsar (AXP) XTE J1810−197. These data, obtained in March 2004 with the adaptive optics camera NAOS-CONICA at the ESO VLT, show that the candidate proposed by Israel et al. (2004) was fainter by ∆H = 0.7 ± 0.2 and ∆Ks = 0.5 ± 0.1 with respect to October 2003, confirming it as...
متن کاملDiscovery of Radio Emission from Transient Anomalous X - ray Pulsar XTE J 1810 − 197
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 precise location of the 5.54 s pulsar XTE J1810−197. This is greater than upper limits from all other AXPs and from quiescent states of soft gammaray repeaters (SG...
متن کاملOn the X-ray Light Curve, Pulsed-radio Emission, and Spin Frequency Evolution of the Transient Anomalous X-ray Pulsar Xte J1810 197 during Its X-ray Outburst
We show that (1) the long-term X-ray outburst light curve of the transient AXPXTE J1810 197 can be accounted for by a fallback disk that is evolving toward quiescence through a disk instability after having been heated by a soft gamma-ray burst, (2) the spin-frequency evolution of this source in the same period can also be explained by the disk torque acting on the magnetosphere of the neutron ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: The Astrophysical Journal
سال: 2004
ISSN: 0004-637X,1538-4357
DOI: 10.1086/422636