1997A&A...323L..37M

Query : 1997A&A...323L..37M

1997A&A...323L..37M - Astronomy and Astrophysics, volume 323, L37-40 (1997/7-1)

Soft X-ray emission and optical multicolors of faint QSOs in the Selected Area 57.

MIYAJI T., CONNOLLY A.J., SZALAY A.S. and BOLDT E.

Abstract (from CDS):

We present the ROSAT HRI X-ray measurements of 19 spectroscopically confirmed optically-selected QSOs in the 12' radius region in the Selected Area 57. The optical-to-X-ray spectral index αox ranges from 1.25 to 1.7, consistent with brighter QSOs. We have investigated the relationship between soft X-ray emission observed with the ROSAT HRI and optical colors (UJFN) of optically-selected QSOs in SA57. The optical to X-ray spectral index αox is found to be correlated with the U-J-F+N color, by a combined effect of αox and U, N excess correlations. Possible explanations are the physical link between broad emission-lines/Balmer continuum, and the ionizing radiation source seen in X-ray and/or a geometrical effect.

Abstract Copyright: ∼

Journal keyword(s): Galaxies: active - X-rays: general

Simbad objects: 20

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Number of rows : 20
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024 		#notes
1 SA57X 51 QSO 13 08 01.659 +29 20 09.12   22.39 22.08 21.47   ~ 7 0
2 [VV96] J130806.1+292239 QSO 13 08 06.1539316896 +29 22 39.276956568   21.73 21.49 21.82   ~ 20 0
3 [VV96] J130812.1+292513 QSO 13 08 11.9201013240 +29 25 12.641278440   19.07 18.79 19.01   ~ 40 0
4 QSO B1305+2930 QSO 13 08 12.1970897856 +29 14 59.120452932   21.60 21.09 21.30   ~ 14 0
5 [VV96] J130813.2+292244 QSO 13 08 13.2339219072 +29 22 44.159737836   20.83 20.64 20.05   ~ 14 0
6 QSO B1305+2932 QSO 13 08 15.747 +29 16 12.27   21.92 21.37 20.74   ~ 19 0
7 PB 3340 QSO 13 08 16.0798320672 +29 19 17.796945036   19.37 19.18 19.06   ~ 27 0
8 QSO B1306+2938 QSO 13 08 23.3297741688 +29 22 34.290406488   22.29 21.97 21.50   ~ 15 0
9 QSO B1306+2946 QSO 13 08 24.3872446008 +29 30 36.742821624   20.88 20.79 20.71   ~ 22 1
10 [VV96] J130826.8+291528 QSO 13 08 27.2263002432 +29 15 25.229215368   20.60 20.28 20.16   ~ 20 0
11 QSO B1306+2941 QSO 13 08 30.403 +29 25 01.90   21.67 21.44 22.07   ~ 21 0
12 QSO B1306+295 QSO 13 08 32.0975801952 +29 19 12.003847896   19.83 19.76 20.34   ~ 19 0
13 SA 57- reg 13 08 38 +29 23.1           ~ 179 0
14 [VV96] J130839.5+291849 QSO 13 08 39.761 +29 18 50.27   20.64 20.30 20.55   ~ 14 0
15 SA57X 126 AGN 13 08 42.1 +29 30 43   22.58 22.17 21.79   ~ 11 0
16 QSO B1306+2944 QSO 13 08 44.1383224200 +29 28 40.300030488   20.93 20.75 20.96   ~ 15 0
17 QSO B1306+294 QSO 13 08 49.6462787688 +29 12 44.744537628   20.05 19.88 19.91   ~ 19 0
18 [VV96] J130904.7+291729 QSO 13 09 04.779 +29 17 29.43   20.91 20.64 22.62   ~ 13 0
19 QSO B1306+2943 QSO 13 09 06.320 +29 27 48.26   22.19 21.95 21.85   ~ 12 0
20 [VV96] J130911.9+291552 QSO 13 09 11.8695721128 +29 15 52.550801208   20.00 19.64 19.98   ~ 17 0

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