A New Narrow-Line Seyfert 1 galaxy : RXJ1236.9+2656
| dc.creator | Dewangan, G. C. | |
| dc.creator | Singh, K. P. | |
| dc.creator | Szkody, Paula | |
| dc.creator | Hoard, D. W. | |
| dc.date | 2000-05-31 | |
| dc.date.accessioned | 2026-07-07T01:53:49Z | |
| dc.date.available | 2026-07-07T01:53:49Z | |
| dc.description | We report identification of a narrow-line Seyfert 1 galaxy RXJ1236.9+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 about 3 yr. The ROSAT PSPC spectrum of RXJ1236.9+2656 is well represented by a power-law of Gamma = 3.7 absorbed by matter in our own Galaxy (N_H = 1.33X10^20 cm**-2). Intrinsic soft X-ray luminosity of the NLS1 galaxy is estimated to be 1.5X10^43 erg/s in the energy band of 0.1-2.0 keV. The optical spectrum of RXJ1236.9+2656 is typical of NLS1 galaxies and shows narrow Balmer emission lines (1100 km/s < FWHM < 1700 km/s) of Hbeta, Halpha, and forbidden lines of [O III] and [N II]. Fe II multiplets, usually present in optical spectra of NLS1 galaxies, are also detected in RXJ1236.9+2656. | |
| dc.description | 4 pages, A&A style Latex, To apear in A&A as a research note | |
| dc.identifier | https://arxiv.org/abs/astro-ph/0005605 | |
| dc.identifier | http://arxiv.org/abs/astro-ph/0005605 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/1109 | |
| dc.subject | Astrophysics | |
| dc.title | A New Narrow-Line Seyfert 1 galaxy : RXJ1236.9+2656 | |
| dc.type | text |