1999ApJ...517..622X

Query : 1999ApJ...517..622X

1999ApJ...517..622X - Astrophys. J., 517, 622-626 (1999/June-1)

Spectroscopy of 18 new narrow-line Seyfert 1 galaxies from the ROSAT all-sky survey.

XU D.W., WEI J.Y. and HU J.Y.

Abstract (from CDS):

We present the discovery of 18 narrow-line Seyfert 1 galaxies (NLS1s). Three out of the 18 objects are quasar-luminosity NLS1s. The data presented here significantly increase the number of NLS1s. The new NLS1s were detected in the ROSAT All-Sky Survey. The optical spectra show Balmer lines only slightly broader than the forbidden lines and contain strong Fe II emission. No particularly soft X-ray spectral slopes can be seen as compared to a normal Seyfert 1 galaxy sample.

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Journal keyword(s): Galaxies: Seyfert - Galaxies: Quasars: Emission Lines - X-Rays: Galaxies

Simbad objects: 18

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Number of rows : 18
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 LEDA 3095388 Sy1 00 00 11.7263871960 +05 23 17.514764988   16.4       ~ 17 0
2 SDSS J002445.69+082057.0 Sy1 00 24 45.697 +08 20 57.03   17.2 17.2     ~ 15 0
3 2MASX J00322105+2423589 Sy1 00 32 21.0346175856 +24 23 59.399983356   17.3       ~ 17 0
4 ATO J025.0216+11.4915 Sy1 01 40 05.1909594720 +11 29 29.496895404   16.2 16.2     ~ 10 0
5 LEDA 2816425 Sy1 04 44 28.7756530728 +12 21 11.721056364           ~ 75 0
6 ATO J108.4178+38.3444 Sy1 07 13 40.2851797416 +38 20 39.886051164   14.7       ~ 30 0
7 2MASS J07570492+5832402 Sy1 07 57 04.9298498040 +58 32 40.236002556   17.5       ~ 13 0
8 LEDA 3095785 Sy1 08 06 38.9574958032 +72 48 20.403834696   15.9       ~ 28 1
9 LEDA 2090361 Sy1 09 13 13.7355086640 +36 58 17.229766620   18.39 18.09     ~ 31 0
10 LEDA 3095861 Sy1 09 15 26.2953010368 +78 41 46.477886964   17.2   16.4   ~ 9 0
11 LEDA 1710147 Sy1 09 57 07.1716338648 +24 33 16.166812464   15.8 15.8     ~ 27 0
12 LEDA 3095930 Sy1 10 16 45.1137812808 +42 10 25.528810008   16.63 16.39     ~ 41 0
13 LEDA 3095962 Sy1 10 32 44.2065549528 +39 13 22.740848436   17.97 17.61     ~ 22 0
14 2MASS J11171007+6522073 Sy1 11 17 10.0677331056 +65 22 07.230282924   16.8 16.4     ~ 27 0
15 2MASS J11423182+2503383 Sy1 11 42 31.8177963552 +25 03 38.220619356   17.78 17.53     ~ 28 0
16 2MASS J13282041+2409273 Sy1 13 28 20.4054564576 +24 09 27.401851656   18.03 17.80     ~ 29 0
17 LEDA 3096318 Sy1 14 02 34.4523252168 +21 59 51.615101688   17.00 16.74     ~ 30 0
18 LEDA 1785934 Sy1 22 52 09.3577987800 +26 42 41.224859964   16.0 16.0     ~ 13 0

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