Browsing Publications of Astronomical Society of India by Subject "X-rays:galaxies"

Now showing items 1-3 of 3

Discovery of a new NLQSO: RX J1334.2+3759

Dewangan, G. C; Singh, K. P; Jones, L. R; McHardy, I. M; Newsam, A. M; Mason, K. O (Astronomical Society of India, 2001)

A new narrow-line QSO, RX J1334.2+3759, has been identified at a redshift of 0.3858. The QSO has intrinsic soft X-ray luminosity ~ 2.8 x 1044 erg s-1. Soft X-ray emission from the QSO is highly variable. Rapid variability ...
Narrow-line Seyfert 1 galaxies

Dewangan, G. C (Astronomical Society of India, 2001)

Narrow-line Seyfert 1 (NLS1) galaxies form a distinct subclass of Seyfert 1 galaxies. Optical spectroscopic and X-ray spectral and timing results on NLS1 and the plausible underlying physical parameters thought to be ...
Soft X-ray properties of a complete sample of QSOs

Dewangan, G. C; Singh, K. P (Astronomical Society of India, 2001)

In order to study systematically the soft X-ray emission of AGNs, we have analyzed ROSAT PSPC spectra of 22 QSOs. The QSOs form a complete sample with soft X-ray flux ??1.4 x 10-14 erg cm-2 s-1 in the energy band of 0.1-2.0 ...

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