J/MNRAS/422/2302 X-ray sources in the Phoenix dwarf galaxy (Bartlett+, 2012)
The search for high-mass X-ray binaries in the Phoenix dwarf galaxy.
Bartlett E.S., Coe M.J., Haberl F., McBride V.A., Corbet R.H.D.
<Mon. Not. R. Astron. Soc., 422, 2302-2313 (2012)>
=2012MNRAS.422.2302B 2012MNRAS.422.2302B
ADC_Keywords: X-ray sources ; Galaxies, nearby ; Binaries, X-ray
Keywords: galaxies: individual: Phoenix dwarf - X-rays: binaries -
X-rays: galaxies
Abstract:
We report on the first X-ray images of the Phoenix dwarf galaxy, taken
with XMM-Newton in 2009 July. This Local Group dwarf galaxy shares
similarities with the Small Magellanic Cloud (SMC) including a burst
of star formation ∼50Myr ago. The SMC has an abundance of high-mass
X-ray binaries (HMXBs) and so we have investigated the possibility of
an HMXB population in Phoenix with the intention of furthering the
understanding of the HMXB-star formation rate relation. The data
from the combined European Photon Imaging Cameras (EPIC) were used to
distinguish between different source classes [foreground stars,
background galaxies, active galactic nuclei (AGN) and supernova
remnants] using EPIC hardness ratios and correlations with optical and
radio catalogues.
Description:
The first X-ray images of the Phoenix dwarf galaxy were taken with
XMM-Newton during the satellite revolution 1754 on 2009 July 7. This
paper will discuss the data collected with the European Photon Imaging
Camera (EPIC) MOS and pn detectors.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
tablea1.dat 107 76 Properties of all the sources in the
XMM-Newton field of view
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See also:
B/xmm : XMM-Newton Observation Log (XMM-Newton SOC, 2013)
IX/41 : XMM-Newton Serendipitous Source Cat. 2XMMi-DR3 (XMM-SSC, 2010)
J/AJ/133/2393 : UBVRI phot. in 7 Local Group dwarfs galaxies (Massey+, 2007)
Byte-by-byte Description of file: tablea1.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- Seq [1/101] Sequential number,
<[BCH2012] NNN> in Simbad
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)
16 A1 --- DE- Declination sign (J2000)
17- 18 I2 deg DEd Declination (J2000)
20- 21 I2 arcmin DEm Declination (J2000)
23- 26 F4.1 arcsec DEs Declination (J2000)
28- 30 F3.1 arcsec ePos Error in position
32- 35 F4.1 ct/ks CRate Count rate in 0.2-12keV band
37- 39 F3.1 ct/ks e_CRate rms uncertainty on Crate
41- 44 F4.1 10-17W/m2 Flux Flux in 0.2-12keV band (10-14erg/s/cm2)
46- 48 F3.1 10-17W/m2 e_Flux rms uncertainty on Flux
50- 54 F5.2 [-] logFX/Fopt ?=- X-ray to optical flux ratio (1)
56- 60 F5.2 --- HR1 Hardness ratio 1 (2)
62- 65 F4.2 --- e_HR1 rms uncertainty on HR1
67- 71 F5.2 --- HR2 Hardness ratio 2 (2)
73- 76 F4.2 --- e_HR2 rms uncertainty on HR2
78- 82 F5.2 --- HR3 Hardness ratio 3 (2)
84- 87 F4.2 --- e_HR3 rms uncertainty on HR3
89- 93 F5.2 --- HR4 Hardness ratio 4 (2)
95- 98 F4.2 --- e_HR4 rms uncertainty on HR4
100-107 A8 --- Class Classification (3)
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Note (1): X-ray to optical flux ratio is calculated from the 0.2-4.5keV
flux values and the optical data available in the LGGS or USNO catalogue.
Note (2): The HRs are defined as HRi=(Bi+1-Bi)/(Bi+1+Bi), where
Bi is the count rate in energy band i. The bands are the same as
those used in the source detection:
(0.2-0.5), (0.5-1.0), (1.0-2.0), (2.0-4.5) and (4.5-12.0)keV.
Note (3): The classification column follows the designation in the text
with classified sources in square brackets. Classes are:
fgstar = foreground star
gal = galaxy
AGN = Active Galaxy Nucleus
hard = hard X-ray sources, could be High Mass X-ray Binary (HMXB)
or unidentified AGN.
unclass = unclassified source
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 15-Jan-2013