1998A&A...340L..27H

Query : 1998A&A...340L..27H

1998A&A...340L..27H - Astronomy and Astrophysics, volume 340L27-30 (1998/12-2)

The ROSAT Deep Survey. IV. A distant lensing cluster of galaxies with a bright arc.

HASINGER G., GIACCONI R., GUNN J.E., LEHMANN I., SCHMIDT M., SCHNEIDER D.P., TRUEMPER J., WAMBSGANSS J., WOODS D. and ZAMORANI G.

Abstract (from CDS):

An unusual double-lobed extended X-ray source (RX J105343+5735) is detected in the ROSAT ultra-deep HRI image of the Lockman Hole. The angular size of the source is 1.7x0.7arcmin2 and its X-ray flux is 2x10–14erg/cm2/s. R-band imaging from the Keck telescope revealed a marginal excess of galaxies brighter than R=24.5, but Keck LRIS spectroscopy of 24 objects around the X-ray centroid did not yield a significant number of concordant redshifts. The brightest galaxy close to the centre of the eastern emission peak appears to be a gravitationally lensed arc at z=2.570, suggesting that the X-ray object is associated with the lens, most likely a cluster of galaxies. Based on a comparison of lensing surface mass density, X-ray luminosity, morphology and galaxy magnitudes with clusters of known distance, we argue that RX J105343+5735 is a cluster at a redshift around 1. Future X-ray, ground-based optical/NIR and high resolution HST observations of the system will be able to clarify the nature of the object.

Abstract Copyright: ∼

Journal keyword(s): galaxies: intergalactic medium - cosmology: dark matter, gravitational lensing - X-rays: galaxies

Nomenclature: Table 1: [HGG98] A (Nos A-D). Table 2: [HGG98] NN (Nos 1-24).

CDS comments: lensing cluster of galaxies = ClG J1053+5735, Bright arc = [HGG98] 2.

Simbad objects: 31

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Number of rows : 31
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 [HGG98] 24 G 10 53 08.8 +57 36 05           ~ 1 0
2 [HGG98] 23 G 10 53 21.9 +57 35 40           ~ 1 0
3 [HGG98] 22 G 10 53 22.6 +57 36 53           ~ 1 0
4 [HGG98] 21 G 10 53 22.8 +57 37 37           ~ 1 0
5 [HGG98] 20 G 10 53 26.2 +57 37 27           ~ 1 0
6 [HGG98] 19 G 10 53 27.5 +57 37 10           ~ 1 0
7 [HGG98] 18 G 10 53 28.6 +57 35 38           ~ 1 0
8 [HGG98] 17 rG 10 53 28.90 +57 35 35.6           ~ 2 0
9 [HGG98] C ? 10 53 29.5 +57 35 38           ~ 1 0
10 [HGG98] 16 G 10 53 30.0 +57 35 34           ~ 1 0
11 [HGG98] 15 G 10 53 32.1 +57 35 28           ~ 1 0
12 [HGG98] 14 G 10 53 33.9 +57 35 56           ~ 1 0
13 [HGG98] 13 G 10 53 36.1 +57 36 13           ~ 1 0
14 [HGG98] 12 G 10 53 37.8 +57 36 04           ~ 1 0
15 [HGG98] 11 G 10 53 39.9 +57 35 51           ~ 1 0
16 [HGG98] 10 G 10 53 40.4 +57 35 51           ~ 1 0
17 NAME RX J1053.7+5735 W ClG 10 53 41.0 +57 35 22           ~ 7 0
18 [HGG98] 9 G 10 53 41.5 +57 35 42           ~ 1 0
19 [HGG98] 8 G 10 53 42.3 +57 35 41           ~ 2 0
20 ClG J1053+5735 ClG 10 53 43.4 +57 35 21           ~ 31 1
21 [HGG98] 7 G 10 53 43.5 +57 35 31           ~ 1 0
22 [HGG98] 6 G 10 53 44.5 +57 35 17           ~ 1 0
23 [HGG98] 5 G 10 53 44.9 +57 35 15           ~ 2 0
24 NAME RX J1053.7+5735 E ClG 10 53 46.60 +57 35 17.1           ~ 9 0
25 [HGG98] 4 G 10 53 47.0 +57 35 10           ~ 1 0
26 [HGG98] 2 G 10 53 47.3 +57 35 10           ~ 3 0
27 [HGG98] 3 G 10 53 47.3 +57 35 22           ~ 1 0
28 RDS 805A Sy1 10 53 47.37 +57 33 50.0     22.6     ~ 10 0
29 [HGG98] D ? 10 53 48.2 +57 33 55           ~ 1 0
30 BD+26 2606 SB* 14 49 02.3593347728 +25 42 09.192358874 9.92 10.16 9.73 9.27 8.95 A5 383 0
31 ACO 2218 ClG 16 35 54.0 +66 13 00           ~ 827 1

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