J/A+A/421/175 XMM sources in Blanco 1 (Pillitteri+, 2004)
XMM-Newton observations of the young open cluster Blanco 1.
I. X-ray spectroscopy and photometry.
Pillitteri I., Micela G., Sciortino S., Damiani F., Harnden F.R.JR
<Astron. Astrophys., 421, 175-186 (2004)>
=2004A&A...421..175P 2004A&A...421..175P
ADC_Keywords: Clusters, open ; X-ray sources
Keywords: X-ray: stars - stars: activity -
Galaxy: open clusters and associations: individual: Blanco 1
Abstract:
We present an X-ray study of the high metallicity young open cluster
Blanco 1 based on XMM-Newton data. X-ray spectroscopy of cluster
members is presented for the first time as well as new X-ray
distribution functions of late-type stars. We detected all known dF
and dG stars in the EPIC field and 80% and 90% of dK and dM stars,
respectively. The X-ray spectral analysis of the X-ray brightest
cluster stars and X-ray color analysis of a larger sample show that a
model with two temperatures (at about 0.3 and 1keV) explains the
quiescent activity phase spectra. We discuss also the nature of
unidentified X-ray sources in the observed region and their X-ray
spectral properties.
Description:
The observation studied here was performed with the XMM-Newton
satellite in June 2002 during revolution 0461 with a nominal duration
of 50ks.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
tablea1.dat 55 90 X sources with a counterpart in the optical
and infrared catalogs USNO, GSC2 and 2MASS
tableb1.dat 78 64 Unidentified X-ray source positions and properties
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See also:
B/xmm : XMM-Newton Observation Log (XMM-Newton Science Operation Center, 2002)
IX/37 : XMM-Newton Serendipitous Source Catalogue (1XMM) (XMM-SSC, 2003)
J/A+A/399/919 : X-ray Luminosities in Blanco 1 (Pillitteri+, 2003)
J/A+AS/121/213 : BV photometry of Blanco 1 stars (Panagi+, 1997)
Byte-by-byte Description of file: tablea1.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- [PMS2004] Sequential number, [PMS2004] Opt NNN
5- 6 I2 h RAh Right ascension (J2000)
8- 9 I2 min RAm Right ascension (J2000)
11- 14 F4.1 s RAs Right ascension (J2000)
17 A1 --- DE- Declination sign (J2000)
18- 19 I2 deg DEd Declination (J2000)
21- 22 I2 arcmin DEm Declination (J2000)
24- 27 F4.1 arcsec DEs Declination (J2000)
30- 32 F3.1 arcsec e_Pos Error on position
34- 39 F6.2 ks ExpTime Exposition time (G1)
41- 44 F4.1 ct/ks CRate Count rate (G1)
46- 48 F3.1 ct/ks e_CRate rms uncertainty on CRate
50- 51 I2 --- USNO-B1 Positional matches within 13" in USNO-B1,
(I/284) catalog
53 I1 --- GSC2 Positional matches within 13" in GSC2,
(I/271) catalog
55 I1 --- 2MASS Positional matches within 13" in 2MASS,
(II/246) catalog
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Byte-by-byte Description of file: tableb1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
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1- 2 I2 --- [PMS2004] Sequential number, [PMS2004] Un NN
4- 7 A4 --- --- [XMMU]
9- 24 A16 --- XMMU XMMU designation (JHHMMSS.s+DDMMSS) (1)
27- 28 I2 h RAh Right ascension (J2000)
30- 31 I2 min RAm Right ascension (J2000)
33- 36 F4.1 s RAs Right ascension (J2000)
38 A1 --- DE- Declination sign (J2000)
39- 40 I2 deg DEd Declination (J2000)
42- 43 I2 arcmin DEm Declination (J2000)
45- 48 F4.1 arcsec DEs Declination (J2000)
50- 54 F5.2 arcmin Offaxis Offaxis
56- 60 F5.2 --- Signi Significance
62- 67 F6.2 ks ExpTime Exposition time (G1)
69- 73 F5.2 ct/ks CRate Count rate (G1)
75- 78 F4.2 ct/ks e_CRate rms uncertainty on CRate
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Note (1): The name follows the naming convention adopted for the unidentified
XMM sources.
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Global notes:
Note (G1): The exposure times and the count rates are scaled on the MOS1
instrument.
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 14-Jun-2005