J/MNRAS/390/59 X-ray sources in NGC 5775 (Li+, 2008)
Chandra observation of the edge-on spiral NGC 5775:
probing the hot galactic disc/halo connection.
Li J.-T., Li Z., Wang Q.D., Irwin J.A., Rossa J.
<Mon. Not. R. Astron. Soc., 390, 59-70 (2008)>
=2008MNRAS.390...59L 2008MNRAS.390...59L
ADC_Keywords: X-ray sources
Keywords: galaxies: general - galaxies: individual: NGC 5775 -
galaxies: spiral - X-rays: general
Abstract:
We study the edge-on galaxy NGC 5775, utilizing a 58.2ks Chandra
ACIS-S observation together with complementary Hubble Space Telescope
(HST) ACS, Spitzer IRAC and other multi-wavelength data sets. This
edge-on galaxy, with its disc-wide active star formation, is
particularly well suited for studying the disc/halo interaction on
subgalactic scales. We detect 27 discrete X-ray sources within the
D25 region of the galaxy, including an ultra-luminous source with a
0.3-7keV luminosity of ∼7x1040erg/s.
Description:
The archival Chandra observation of NGC 5775 (Obs. ID. 2940) was taken
on April 5, 2002, with a total effective exposure of 58.2ks.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 68 99 Chandra Source List
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See also:
J/ApJ/574/258 : X-ray-emitting young stars in Orion nebula (Feigelson+, 2002)
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 2 I2 --- [LLW2008] Source sequential number
4- 22 A19 --- CXOU CXOU Name (JHHMMSS.ss+DDMMSS.s)
24- 26 F3.1 arcsec e_Pos Position uncertainty (1)
28- 32 F5.2 ct/ks CR On-axis source broad-band count rate
34- 37 F4.2 ct/ks e_CR rms uncertainty on CR
39- 43 F5.2 --- HR ? Hardness ratio, HR=(H-S2)/(H+S2) (2)
45- 48 F4.2 --- e_HR ? rms uncertainty on HR
51- 55 F5.2 --- HR1 ? Hardness ratio 1, HR1=(S2-S1)/S (2)
57- 60 F4.2 --- e_HR1 ? rms uncertainty on HR1
62- 68 A7 --- Det [BSH, ] Bands in which the source is
detected (3)
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Note (1): Position uncertainty calculated from the maximum likelihood
centroiding and an approximate off-axis angle (r) dependent systematic
error 0.2+1.4(r/8arcmin)2arcsec (an approximation to fig. 4 of
Feigelson et al., 2002, Cat. J/ApJ/574/258), which are added in
quadrature.
Note (2): Listed only for values with uncertainties less than 0.2. Bands
are S1=0.3-0.7keV, S2=0.7-1.5keV, H1=1.5-3keV and H2=3-7keV.
Note (3): The label 'B' (broad-band), 'S' (soft) or 'H' (hard) mark the
band in which a source is detected with the most accurate position
that is adopted in Column CXOU
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 18-Oct-2008