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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, initial ingredient Co3O4 is found better than CoO in circumventing the inte
Externí odkaz:
http://arxiv.org/abs/1507.05190
Publikováno v:
Astronomical Society of India Conference Series, Vol. 5, p. 81 (2012)
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 lighter particles (e.g: electron-positron pair plasma) at same temperat
Externí odkaz:
http://arxiv.org/abs/1309.7968
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 with Gamma= 2.5^{+0.4}_{-0.3}, and column density N_H=1.9^{+0.1}_{-0.2}
Externí odkaz:
http://arxiv.org/abs/1209.1354
Autor:
Chakrabarti, Sandip K., Debnath, D., Pal, P. S., Nandi, A., Sarkar, R., Samanta, M. M., Wiita, P. J., Ghosh, H., Som, D.
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 spectrum implies that the oscillation involves in the dynamical and no
Externí odkaz:
http://arxiv.org/abs/0903.1482
Autor:
Wilkes, B. J., Pounds, K. A., Schmidt, G. D., Smith, P. S., Cutri, R. M., Ghosh, H., Nelson, B., Hines, D. C.
Publikováno v:
Astrophys.J.634:183-192,2005
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 substantial absorbing material in three sources with optical classifi
Externí odkaz:
http://arxiv.org/abs/astro-ph/0510062
Autor:
Silverman, J., Green, P., Barkhouse, W., Kim, D., Aldcroft, T., Cameron, R., Wilkes, B., Mossman, A., Ghosh, H., Tananbaum, H., Smith, M., Smith, R., Smith, P., Foltz, C., Wik, D., Jannuzi, B.
Publikováno v:
Astrophys.J.618:123-138,2004
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 of the Chandra Multi-wavelength Project. These medium depth X-ray obse
Externí odkaz:
http://arxiv.org/abs/astro-ph/0409337
Autor:
Ghosh, H.
Publikováno v:
Astrophys.J. 615 (2004) 450
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, could lead to a direct, accurate measurement of the lens mass. First
Externí odkaz:
http://arxiv.org/abs/astro-ph/0405500
Autor:
Green, Paul J., Silverman, J. D., Cameron, R. A., Kim, D. -W., Wilkes, B. J., Barkhouse, W. A., LaCluyze, A., Morris, D., Mossman, A., Ghosh, H., Grimes, J. P., Jannuzi, B. T., Tananbaum, H., Aldcroft, T. L., Collaboration, the ChaMP
Publikováno v:
Astrophys.J.Suppl.150:43-71,2004
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 Project (ChaMP). Of the 486 X-ray sources detected between 3e-16 and 2
Externí odkaz:
http://arxiv.org/abs/astro-ph/0308506
Autor:
Kim, D. -W., Wilkes, B. J., Green, P. J., Cameron, R. A., Drake, J. J., Evans, N. R., Freeman, P., Gaetz, T. J., Ghosh, H., Harnden, Jr., F. R., Karovska, M., Kashyap, V., Maksym, P. W., Ratzlaff, P. W., Schlegel, E. M., Silverman, J. D., Tananbaum, H. D., Vikhlinin, A. A.
Publikováno v:
Astrophys.J.600:59-69,2004
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 specifically developed for the ChaMP and then validated by visual exa
Externí odkaz:
http://arxiv.org/abs/astro-ph/0308493