Park, Sangwook, Kargaltsev, Oleg, Pavlov, George G., Mori, Koji, Slane, Patrick O., Hughes, John P., ...
We present results from our X-ray data analysis of the SNR G330.2+1.0 and its CCO, CXOU J160103.1--513353 (J1601). Using our XMM-Newton and Chandra observations, we find that the X-ray spectrum of...
Guillot, Sebastien, Rutledge, Robert E., Bildsten, Lars, Brown, Edward F., Pavlov, George G., Zavlin, Vyacheslav E.
We report the search for low-mass X-ray binaries in quiescence (qLMXBs) in the globular cluster NGC 6304 using XMM observations. We present the spectral analysis, leading to the identification of...
Spectral and Rotational Changes in the Isolated Neutron Star RX J0720.4-3125 (2007)
Van Kerkwijk, Marten H., Kaplan, David L., Pavlov, George G., Mori, Kaya
RX J0720.4-3125 is an isolated neutron star that, uniquely in its class, has shown changes in its thermal X-ray spectrum. We use new spectra taken with Chandra's Low Energy Transmission Grating...
Discovery of a Candidate Central Compact Object in the Galactic Nonthermal SNR G330.2+1.0 (2006)
Park, Sangwook, Mori, Koji, Kargaltsev, Oleg, Slane, Patrick O., Hughes, John P., Burrows, David N., ...
We report on the discovery of a pointlike source (CXOU J160103.1$-$513353) at the center of a Galactic supernova remnant (SNR) G330.2+1.0 with {\it Chandra X-Ray Observatory}. The X-ray spectrum fits...
Evidence for a Binary Companion to the Central Compact Object 1E 1207.4-5209 (2006)
Woods, Peter M., Zavlin, Vyacheslav E., Pavlov, George G.
Unique among neutron stars, 1E 1207.4-5209 is an X-ray pulsar with a spin period of 424 ms that contains at least two strong absorption features in its energy spectrum. This neutron star has been...
Once-ionized helium in superstrong magnetic fields (2005)
Pavlov, George G., Bezchastnov, Victor G.
It is generally believed that magnetic fields of some neutron stars, the so-called magnetars, are enormously strong, up to 10^{14} - 10^{15} G. Recent investigations have shown that the atmospheres...
XMM-Newton observation of the drifting pulsar B0943+10 (2005)
Zhang, Bing, Sanwal, Divas, Pavlov, George G.
Radio pulsar subpulse drifting has been interpreted as rotation of sub-beams (sparks) of pair plasma produced by intermittent breakdowns of an inner vacuum gap above the pulsar polar cap. This model...
The Vela Pulsar in the Ultraviolet (2005)
Romani, Roger W., Kargaltsev, Oleg, Pavlov, George G.
We describe time-tagged observations of the Vela pulsar (PSR B0833-45) with the HST STIS MAMA-UV detectors. Using an optimal extraction technique, we obtain a NUV light curve and crude FUV...
Weisskopf, Martin C., Becker, Werner, Swartz, Douglas A., Pavlov, George G., Elsner, Ronald F., Grindlay, Jonathan, ...
Central Compact Objects in Supernova Remnants (2003)
Pavlov, George G., Sanwal, Divas, Teter, Marcus A.
There are point-like sources in central regions of several supernova remnants which have not been detected outside the X-ray range. The X-ray spectra of these Central Compact Objects (CCOs) have...
Becker, W., Swartz, Douglas A., Pavlov, George G., Elsner, Ronald F., Grindlay, Jonathan, Mignani, Roberto, ...
Search for the optical counterpart of the nearby pulsar J0108-1431 (2002)
Mignani, Roberto P., Manchester, Richard N., Pavlov, George G.
We present the results of first deep optical observations of the field of the old ($\sim 10^8$ yr), nearby, isolated pulsar J0108-1431, in an attempt to detect its optical counterpart. The...
The Compact Central Object in the Supernova Remnant G266.2-1.2 (2002)
Kargaltsev, Oleg, Pavlov, George G., Sanwal, Divas, Garmire, Gordon P.
We observed the compact central object CXOU J085201.4--461753 in the supernova remnant G266.2--1.2 (RX J0852.0--4622) with the Chandra ACIS detector in timing mode. The spectrum of this object can be...
Variable Thermal Emission from Aql X-1 in Quiescence (2002)
Rutledge, Robert E., Bildsten, Lars, Brown, Edward F., Pavlov, George G., Zavlin, Vyacheslav E.
We obtained four Chandra/ACIS-S observations beginning two weeks after the end of the November 2000 outburst of the neutron star (NS) transient Aql X-1. Over the five month span in quiescence, the...
Crustal emission and the quiescent spectrum of the neutron star in KS 1731-260 (2002)
Rutledge, Robert E., Bildsten, Lars, Brown, Edward F., Pavlov, George G., Zavlin, Vyacheslav E., Ushomirsky, Greg
The type I X-ray-bursting low-mass X-ray binary KS 1731-260 was recently detected for the first time in quiescence by Wijnands et al. following a tau(ob) approximate to 13 yr outburst, which ended in...
Variable thermal emission from aquila X-1 in quiescence (2002)
Rutledge, Robert E., Bildsten, Lars, Brown, Edward F., Pavlov, George G., Zavlin, Vyacheslav E.
We obtained four Chandra/ACIS-S observations beginning 2 weeks after the end of the 2000 November outburst of the neutron star (NS) transient Aql X-1. Over the 5 month span in quiescence, the X-ray...
Crustal Emission and the Quiescent Spectrum of the Neutron Star in KS 1731-260 (2001)
Rutledge, Robert E., Bildsten, Lars, Brown, Edward F., Pavlov, George G., Zavlin, Vyacheslav E., Ushomirsky, Greg
(Abridged). The type-I X-ray bursting low mass X-ray binary KS 1731-260 was recently detected for the first time in quiescence by Wijnands et al., following an approximately 13 yr outburst which...
Identification of A Transient Neutron Star in Quiescence in the Globular Cluster NGC 5139 (2001)
Rutledge, Robert E., Bildsten, Lars, Brown, Edward F., Pavlov, George G., Zavlin, Vyacheslav E.
Using the Chandra/ACIS-I detector, we have identified an X-ray source (CXOU 132619.7-472910.8) in the globular cluster NGC 5139 with a thermal spectrum identical to that observed from transiently...
Quiescent Thermal Emission from the Neutron Star in Aql X-1 (2001)
Rutledge, Robert E., Bildsten, Lars, Brown, Edward F., Pavlov, George G., Zavlin, Vyacheslav E.
We report on the quiescent spectrum measured with Chandra/ACIS-S of the transient, type-I X-ray bursting neutron star Aql X-1, immediately following an accretion outburst. The neutron star radius,...
The Quiescent X-Ray Spectrum of the Neutron Star in Cen X-4 Observed with Chandra/ACIS-S (2000)
Rutledge, Robert E., Bildsten, Lars, Brown, Edward F., Pavlov, George G., Zavlin, Vyacheslav E.
We report on spectral and intensity variability analysis from a Chandra/ACIS-S observation of the transient, type-I X-ray bursting low-mass X-ray binary Cen X-4. The quiescent X-ray spectrum during...
Rutledge, Robert E., Bildsten, Lars, Brown, Edward F., Pavlov, George G., Zavlin, Vyatcheslav E.
We fit hydrogen atmosphere models to the X-ray data for four neutron stars (three from a previous paper, plus 4U 2129+47) and six black hole candidates (A0620-00, GS 2000+25, GS 1124-68, GS 2023+33,...
PSR J0437--4715: X-rays from polar caps (1998)
Vyacheslav E. Zavlin, George G. Pavlov
Introduction The 5.75 ms pulsar J0437--4715 is of special interest due to its prominent manifestations at both radio and X-ray wavelengths. It is the closest known millisecond pulsar with a distance...
Thermal Radiation From Neutron Star Atmospheres (1998)
George G. Pavlov, Vyacheslav E. Zavlin
Properties of the thermal-like radiation emitted by neutron stars (NSs) are determined by thin plasma layers (atmospheres) at their surfaces. The NS atmospheres are very different from those of usual...
Discrete eigenstates of the He+ ion moving in a strong magnetic field (1997)
Victor G. Bezchastnov, George G. Pavlov, Joseph Ventura
We present precise results for the binding energies and sizes of the He + ion moving accross a strong pulsar-type magnetic field. Similarly to the previously studied case of hydrogen, the ion is...
Photoionization Of Hydrogen In Atmospheres Of Magnetic Neutron Stars (1997)
Alexander Y. Potekhin, George G. Pavlov
The strong magnetic fields (B ΒΈ 10 12 Gamma 10 13 G) characteristic of neutron stars make all the properties of an atom strongly dependent on the transverse component K? of its generalized momentum....