1997A&AS..123..103Z

Query : 1997A&AS..123..103Z

1997A&AS..123..103Z - Astron. Astrophys., Suppl. Ser., 123, 103-114 (1997/May-2)

Identification of a complete sample of northern ROSAT All-Sky Survey X-ray sources. II. The optical observations.

ZICKGRAF F.-J., THIERING I., KRAUTTER J., APPENZELLER I., KNEER R., VOGES W.H., ZIEGLER B., CHAVARRIA C., SERRANO A., MUJICA R., PAKULL M. and HEIDT J.

Abstract (from CDS):

We describe a program for the optical identification of a representative sample of RASS sources contained in six study areas north of δ=-9°, with |b^II|>20° including one region near the North Galactic pole (NGP) and one near the North Ecliptic pole (NEP) and present some preliminary results. A full identification has been carried out for a count-rate and area-limited complete subsample comprising 674 sources. The ratio of "extragalactic" ( e.g. AGN, clusters of galaxies) to "stellar" (e.g. coronal emitters, active binaries) counterparts was found to depend on the galactic neutral hydrogen column density, N_H. In the area near the NGP (low N_H) "extragalactic" counterparts dominate, while in the area with the highest N_H most X-ray sources are identified with stellar counterparts.

Abstract Copyright: ∼

Journal keyword(s): surveys - X-rays: general - X-rays: galaxies - X-rays: stars - galaxies: active - galaxies: cluster: general

CDS comments: SAO 9189 far from the proposed correlation (RX J1839.0+7257) (.)

Simbad objects: 18

Full paper

View the references in ADS

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 - 2023	#notes
1	[VV98] J040329.5+083703	QSO	04 03 30.1098194904	+08 36 44.283061404		18.3	18.42			~	10	0
2	2MASX J07471915+6822518	Sy1	07 47 19.2318026736	+68 22 51.419282304		18.61	17.72			~	6	0
3	HD 95900	PM*	11 03 50.0684840592	-07 41 17.569715064		8.32	7.39			K0III	24	0
4	NAME HD 96064 BC	**	11 04 40.976136	-04 13 24.66912				9.87		M0.0V	28	0
5	FIRST J120744.6+314851	Bla	12 07 44.66	+31 48 51.5						~	7	0
6	HD 108944	SB*	12 31 00.7365207192	+31 25 25.802419440		7.82	7.3			F9V	60	0
7	* 31 Com	Ro*	12 51 41.9201696640	+27 32 26.565016812	5.81	5.61	4.94	4.39	4.04	G0IIIp	427	1
8	HD 148941	*	16 25 29.2232342760	+71 23 04.480046268		7.69	7.10			F8	33	0
9	BD+72 732	*	16 26 34.4795872272	+72 02 38.899076640		11.32	10.26			K2	2	0
10	HD 163183	PM*	17 47 38.1777173760	+73 07 57.646788816		8.33	7.75			G0	38	0
11	BD+70 990	*	18 18 31.8915786600	+70 42 16.882825428		10.86	10.04			G5	8	0
12	BD+70 991	*	18 18 37.8505448784	+70 42 19.576905552		10.63	9.81			G5	6	0
13	RX J1825.8+7144	X	18 25 53.9	+71 43 53						~	1	0
14	HD 171044	*	18 25 54.2560597056	+71 43 54.339399660		7.79	7.34			F5	24	0
15	HD 173127	*	18 36 58.5481887648	+72 16 01.231763916		9.09	8.55			G5	10	0
16	RX J1839.0+7257	X	18 39.0	+72 57						~	1	0
17	RX J1857.9+7703	X	18 57 56.102	+77 03 08.50						~	1	0
18	HD 178089	PM*	18 57 57.1796772240	+77 03 02.965379220	6.940	6.950	6.570			F2V	55	0

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