A new narrow-line Seyfert 1 galaxy: RX J1236.9+2656

Dewangan, G. C. ; Singh, K. P. ; Szkody, P. ; Hoard, D. W. (2000) A new narrow-line Seyfert 1 galaxy: RX J1236.9+2656 Astronomy & Astrophysics, 360 . pp. 107-110. ISSN 1432-0746

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Official URL: http://aa.springer.de/bibs/0360001/2300107/small.h...

Abstract

We report identification of a narrow-line Seyfert 1 galaxy RX J1236.9+2656. X-ray emission from the NLS1 galaxy undergoes long-term variability with 0.1-2.0 keV flux changing by a factor of ∼ 2 within ∼3. The ROSAT PSPC spectrum of RX J1236.9+2656 is well represented by a power-law of Γx=3.7+0.5−0.3 absorbed by matter in our own Galaxy (NH=1.33×1020 cm−2). Intrinsic soft X-ray luminosity of the NLS1 galaxy is estimated to be ∼ 1.5×1013 erg s−1 in the energy band of 0.1-2.0keV. The optical spectrum of RX J1236.9+2656 is typical of NLS1 galaxies and shows narrow Balmer emission lines (1100 km s−1 < FWHM < 1700 km s−1) of Hβ, Hα, and forbidden lines of [O III] and [N II]. Fe II multiplets, usually present in optical spectra of NLS1 galaxies, are also detected in RX J1236.9+2656.

Item Type:Article
Source:Copyright of this article belongs to EDP Sciences.
Keywords:Galaxies: Active; Galaxies: Individual; RX J1236.9+2656; Galaxies: Nuclei; X-rays: Galaxies
ID Code:59013
Deposited On:03 Sep 2011 12:12
Last Modified:03 Sep 2011 12:12

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