J/MNRAS/371/147 XMM-Newton observation of NGC 2613 (Li+, 2006)
An XMM-Newton observation of the massive edge-on Sb galaxy NGC 2613.
Li Z., Wang Q.D., Irwin J.A., Chaves T.
<Mon. Not. R. Astron. Soc., 371, 147-156 (2006)>
=2006MNRAS.371..147L 2006MNRAS.371..147L
ADC_Keywords: Active gal. nuclei ; X-ray sources
Keywords: galaxies: general - galaxies: individual: NGC 2613 -
galaxies: spiral - X-rays: general
Abstract:
We present an XMM-Newton observation of the massive edge-on Sb galaxy
NGC 2613. We discover that this galaxy contains a deeply embedded
active nucleus with a 0.3-10keV luminosity of 3.3x1040erg/s and a
line-of-sight absorption column of 1.2x1023cm-2. Within the 25mag
arcsec-2 optical B-band isophote of the galaxy, we detect an
additional four sources with an accumulated luminosity of
4.3x1039erg/s. The bulk of the unresolved X-ray emission spatially
follows the near-infrared (NIR) K-band surface brightness
distribution; the luminosity ratio LX/LK∼8x10-4 is consistent with
that inferred from galactic discrete sources. This X-ray-NIR
association and the compatibility of the X-ray spectral fit with the
expected spectrum of a population of discrete sources suggest that
low-mass X-ray binaries (LMXBs) are the most likely emitters of the
unresolved emission in the disc region.
Description:
We obtained two XMM-Newton observations on NGC 2613. The first
observation (Obs. ID 0149160101), taken on 2003 April 23/24 with a
40-ks exposure, suffered heavily from background flares. Consequently,
another observation (observation ID 0149160201) with a 33-ks exposure
was taken on 2003 May 20/21. In our analysis, we only used the data
obtained from the second observation.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 69 67 XMM-Newton source list
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See also:
J/MNRAS/371/83 : XMM obs. of Arches & Quintuplet clusters (Wang+, 2006)
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 2 I2 --- [LWI2006] Source sequential number
4- 22 A19 --- XMMU XMMU Name (JHHMMSS.ss+DDMMSS.s)
24- 26 F3.1 arcsec e_Pos Position uncertainty (1)
28- 33 F6.2 ct/ks CR On-axis source broad-band count rate (2)
35- 39 F5.2 ct/ks e_CR rms uncertainty on CR
41- 45 F5.2 --- HR ?=- Hardness ratio, HR=(H-S2)/(H+S2) (3)
47- 50 F4.2 --- e_HR ?=- rms uncertainty on HR
52- 56 F5.2 --- HR1 ?=- Hardness ratio, HR1=(S2-S1)/S (3)
58- 61 F4.2 --- e_HR1 ?=- rms uncertainty on HR1
63- 69 A7 --- Flag [BHS, ] Detection band flags (4)
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Note (1): Position uncertainty (1sigma) calculated from the
maximum-likelihood centroiding.
Note (2): The sum of the exposure-corrected count rates in the four bands.
Note (3): Listed only for values with uncertainties less than 0.2.
Definition of the bands: 0.5-1 (S1), 1-2 (S2), 2-4.5 (H1) and
4.5-7.5keV (H2). In addition, S=S1+S2, H=H1+H2 and B=S+H.
Note (4): The label 'B', 'S' or 'H' mark the band in which a source
is detected. The band which generates the most accurate X-ray
centroid position, is listed first.
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 15-May-2007