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 =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: -------------------------------------------------------------------------------- FileName Lrecl Records Explanations -------------------------------------------------------------------------------- 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 -------------------------------------------------------------------------------- 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 -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 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, () catalog 53 I1 --- GSC2 Positional matches within 13" in GSC2, () catalog 55 I1 --- 2MASS Positional matches within 13" in 2MASS, () catalog -------------------------------------------------------------------------------- Byte-by-byte Description of file: tableb1.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 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 -------------------------------------------------------------------------------- Note (1): The name follows the naming convention adopted for the unidentified XMM sources. -------------------------------------------------------------------------------- Global notes: Note (G1): The exposure times and the count rates are scaled on the MOS1 instrument. -------------------------------------------------------------------------------- History: From electronic version of the journal ================================================================================ (End) Patricia Vannier [CDS] 14-Jun-2005