J/A+A/438/291 X-ray sources in NGC 188 (Gondoin+, 2005)
X-ray observations of the old open stellar cluster NGC 188.
Gondoin P.
<Astron. Astrophys., 438, 291-300 (2005)>
=2005A&A...438..291G 2005A&A...438..291G
ADC_Keywords: Clusters, open ; X-ray sources
Keywords: open clusters and associations: general - stars: activity -
stars: coronae - stars: evolution - X-rays: stars
Abstract:
I present the analysis results from XMM-Newton observations of the old
open stellar cluster NGC 188, which has an age of about 7Gyr and a
near solar metallicity. 58 X-ray sources were detected in the field of
view of the EPIC MOS and PN cameras, and 46 sources are new X-ray
detections. Visible counterparts were found for 20 sources including
the variable star WV 28, the W UMa-type binaries V371 Cep and
V372 Cep, and the red giant V11. 9 X-ray sources are identified with
probable cluster non-members, while 43 X-ray sources are of unknown
membership. X-ray emission was detected from 6 stars with high
membership probability above a luminosity threshold of 1030erg/s.
Description:
NGC 188 was observed by the XMM-Newton space observatory in revolution
163, on 29 October 2000.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 116 58 List of X-ray sources detected in NGC 188
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See also:
J/AJ/126/2922 : Astrometry and membership in NGC 188 (Platais+, 2003)
J/AJ/124/601 : Absolute positions + proper motions in NGC 188 (Platais+, 2002)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 2 I2 --- [G2005] Sequential number of the source
4- 18 A15 --- XMMUJ XMMUJ designation (HHMMSS.s+DDMMSS)
20- 22 F3.1 arcsec Drx Distance between the sources positions
measured in the MOS1 and MOS2 cameras
24- 27 F4.1 ct/ks CRMOS1 MOS1 count rate in the 0.5-2.0keV band
29- 31 F3.1 ct/ks e_CRMOS1 rms uncertainty on CRMOS1
33- 36 F4.1 ct/ks CRMOS2 MOS2 count rate in the 0.5-2.0keV band
38- 40 F3.1 ct/ks e_CRMOS2 rms uncertainty on CRMOS2
42- 46 F5.1 ct/ks CRPN PN count rate in the 0.5-2.0keV band
48- 50 F3.1 ct/ks e_CRPN rms uncertainty on CRPN
52- 55 I4 --- PKM ? Identifier of the visible counterpart, in
the NGC 188 WIYN catalogue, Platais et al.,
2003, Cat. J/AJ/126/2922,
Cl* NGC 188 PKM NNNN in Simbad
57- 59 F3.1 arcsec Drv ? Position offset between the X-ray source
and the visible counterpart
61- 65 F5.2 mag Vmag ? V magnitude of the visible counterpart
67- 70 F4.2 mag B-V ? B-V colour index of the visible counterpart
72- 73 I2 % Pmemb ?=- Membership probability to NGC 188
75- 78 F4.1 ct/ks CRROSAT ? Count rate of previous ROSAT detections
(Belloni et al., 1998A&A...339..431B 1998A&A...339..431B)
80- 82 F3.1 ct/ks e_CRROSAT ? rms uncertainty on CRROSAT
84 A1 --- --- [(]
85- 87 A3 --- XName X name (XNN), [BVM98] NGC 188 NN in Simbad
88 A1 --- --- [)]
90-116 A27 --- VNames Source identifiers from known variable stars
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 26-Jul-2006