Publications (13)
Potential Direct Single-Star Mass Measurement
H. Ghosh
We analyze the lightcurve of the microlensing event OGLE-2003-BLG-175/MOA-2003-BLG-45 and show that it has two properties that, when combined with future high resolution astrometry…
Chandra Multi-wavelength Project (ChaMP). II. First Results of X-ray Source Properties
D. -W. Kim, B. J. Wilkes, P. J. Green +15
We present the first results of ChaMP X-ray source properties obtained from the initial sample of 62 observations. The data have been uniformly reduced and analyzed with techniques…
XMM-NEWTON Observations of Red AGN
B. J. Wilkes, K. A. Pounds, G. D. Schmidt +5
XMM-Newton spectra of five red, 2MASS AGN, selected from a sample observed by Chandra to be relatively X-ray bright and to cover a range of hardness ratios, confirm the presence of…
Superconductivity in the Attractive Hubbard Model: The Double Hubbard--I Approximation
J. J. RodrÃguez--Núñez, H. Ghosh
Using the Dyson equation of motion for both the diagonal one-particle Green function, and off--diagonal Green function, , at the level of the Hubbard…
Hard X-ray emitting Active Galactic Nuclei selected by the Chandra Multi-wavelength Project
J. Silverman, P. Green, W. Barkhouse +13
We present X-ray and optical analysis of 188 AGN identified from 497 hard X-ray (f (2.0-8.0 keV) > 2.7x10^-15 erg cm^-2 s^-1) sources in 20 Chandra fields (1.5 deg^2) forming part…
Chandra Multi-wavelength Project (ChaMP). I. First X-ray Source Catalog
D. -W. Kim, R. A. Cameron, J. J. Drake +16
The Chandra Multi-wavelength Project (ChaMP) is a wide-area (~14 deg^2) survey of serendipitous Chandra X-ray sources, aiming to establish fair statistical samples covering a wide…
Effect of equation of state and composition on relativistic flows
I. Chattopadhyay, S. Mandal, H. Ghosh +3
The thermal state of the fluid is governed by the ratio of the thermal and the rest energy. This brings the composition of the fluid into the picture. Although, fluid composed of l…
The Chandra Multi-wavelength Project (ChaMP): a serendipitous survey with Chandra archival data
B. J. Wilkes, P. Green, R. Brissenden +34
The launch of the Chandra X-ray Observatory in July 1999 opened a new era in X-ray astronomy. Its unprecedented, <0.5" spatial resolution and low background are providing views of…
The Chandra Multiwavelength Project: Optical Followup of Serendipitous Chandra Sources
Paul J. Green, J. D. Silverman, R. A. Cameron +12
We present followup optical g', r', and i', imaging and spectroscopy of serendipitous X-ray sources detected in 6 archival Chandra, images included in the Chandra, Multiwavelength…
Ultrafast optical nonlinearity in quasi-one-dimensional Mott-insulator
T. Ogasawara, M. Ashida, N. Motoyama +7
We report strong instantaneous photoinduced absorption (PA) in the quasi-one-dimensional Mott insulator in the IR spectral region. The observed PA is to an even-p…
Quasi Periodic Oscillations due to Axisymmetric and Non-Axisymmetric Shock Oscillations in Black Hole Accretion
Sandip K. Chakrabarti, D. Debnath, P. S. Pal +6
Quasi-Periodic Oscillations (QPOs) are very puzzling since they remain totally unexplained by popular earlier models of accretion disks. The significant rms value in power density…
Two step solid state synthesis and Synchrotron X-ray characterizations of ceramic Co3TeO6; an improper multiferroic
Harishchandra Singh, A. K. Sinha, S. M. Gupta +2
A two step solid state reaction route has been presented to synthesize monophasic cobalt tellurate (Co3TeO6, CTO) using Co3O4 and TeO2 as starting reagents. During synthesis, initi…
Discovery of an active supermassive black hole in the bulge-less galaxy NGC 4561
C. Araya Salvo, S. Mathur, H. Ghosh +2
We present XMM-Newton observations of the Chandra-detected nuclear X-ray source in NGC 4561. The hard X-ray spectrum can be described by a model composed of an absorbed power-law w…