J/AJ/145/143 XMM observations of α Per (Pillitteri+, 2013)
XMM-Newton observation of the α Persei cluster.
Pillitteri I., Evans N.R., Wolk S.J., Bruck Syal M.
<Astron. J., 145, 143 (2013)>
=2013AJ....145..143P 2013AJ....145..143P
ADC_Keywords: Clusters, open; X-ray sources ; Photometry, infrared
Keywords: open clusters and associations: individual: alf Persei -
stars: activity - X-rays: stars
Abstract:
We report on the analysis of an archival observation of part of the
α Persei cluster obtained with XMM-Newton. We detected 102 X-ray
sources in the band 0.3-8.0 keV, of which 39 of them are associated
with the cluster as evidenced by appropriate magnitudes and colors
from Two Micron All Sky Survey photometry. We extend the X-ray
luminosity distribution (XLD) for M dwarfs, to add to the XLD found
for hotter dwarfs from spatially extensive surveys of the whole
cluster by ROSAT. Some of the hotter stars are identified as a
background, possible slightly older group of stars at a distance of
approximately 500 pc.
Description:
A fraction of the α Per cluster was observed by XMM-Newton as
part of the Mission Scientist Guaranteed Time (Pallavicini et al.,
2004MmSAI..75..434P 2004MmSAI..75..434P). A 60ks observation was obtained in 2000
September 5 using EPIC MOS and PN cameras on board XMM-Newton with a
pointing at RA: 3h26m16s and DE: 48d50m29s.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 This file
table1.dat 52 102 List of X-Ray sources detected in EPIC-XMM-Newton
image
table2.dat 84 39 List of sources with 2MASS match and parameters
from best fit modeling of X-Ray spectra
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See also:
B/xmm : XMM-Newton Observation Log (XMM-Newton Science Operation Center, 2012)
II/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)
V/80 : Low-Mass Stars' Membership in Alpha Persei Cluster (Prosser 1992)
J/MNRAS/426/3403 : UKIDSS-GCS α Per members (Lodieu+, 2012)
J/MNRAS/367/781 : XMM observations of NGC 2547 (Jeffries+, 2006)
J/A+A/416/125 : RI photometry in alpha Per and Pleiades (Deacon+, 2004)
J/A+A/421/175 : XMM sources in Blanco 1 (Pillitteri+, 2004)
J/AN/319/215 : Alpha Per cluster low-mass members. II. (Prosser+, 1998)
J/AN/319/201 : Alpha Per cluster low-mass members. I. (Prosser+, 1998)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- Sce [1/102] Running X-ray source number
5- 6 I2 h RAh Hour of Right Ascension (J2000)
8- 9 I2 min RAm Minute of Right Ascension (J2000)
11- 14 F4.1 s RAs Second of Right Ascension (J2000)
16 A1 --- DE- Sign of the Declination
17- 18 I2 deg DEd Degree of Declination (J2000)
20- 21 I2 arcmin DEm Arcminute of Declination (J2000)
23- 26 F4.1 arcsec DEs Arcsecond of Declination (J2000)
28- 32 F5.2 arcmin theta [0.86/15] Offset axis
34- 39 F6.2 --- Signi [4.9/224] Significance
41- 46 F6.3 ct/ks CR [0.212/85.4] X-ray source count rate
48- 52 F5.1 ks Exp [12.9/149] Effective exposure time
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 2 I2 --- Sce [4/96] Running source number
4- 5 I2 h RAh 2MASS Hour of Right Ascension (J2000)
7- 8 I2 min RAm 2MASS Minute of Right Ascension (J2000)
10- 13 F4.1 s RAs 2MASS Second of Right Ascension (J2000)
15 A1 --- DE- 2MASS Sign of the Declination
16- 17 I2 deg DEd 2MASS Degree of Declination (J2000)
19- 20 I2 arcmin DEm 2MASS Arcminute of Declination (J2000)
22- 25 F4.1 arcsec DEs 2MASS Arcsecond of Declination (J2000)
27- 42 A16 --- 2MASS 2MASS identifier (HHMMSSss+DDMMSSs)
44- 48 F5.2 mag Jmag 2MASS J band magnitude (from cat. II/246)
50- 55 F6.3 mag Hmag 2MASS H band magnitude (from cat. II/246)
57- 61 F5.2 mag Kmag 2MASS Ks band magnitude (from cat. II/246)
63- 67 F5.2 keV kT ? Fitted temperature
69- 73 F5.2 cm-3 EM ? Fitted emission measure
75- 79 F5.1 [mW/m2] logFX ? Log of X-ray flux; in erg/s/cm2
81- 84 F4.1 [10-7W] logLX ? Log of X-ray luminosity; in erg/s
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Sylvain Guehenneux [CDS] 28-May-2014