J/ApJ/665/1297 X-ray sources around G12.82-0.02 (Helfand+, 2007)
Discovery of the putative pulsar and wind nebula associated with the TeV
gamma-ray source HESS J1813-178.
Helfand D.J., Gotthelf E.V., Halpern J.P., Camilo F., Semler D.R.,
Becker R.H., White R.L.
<Astrophys. J., 665, 1297-1303 (2007)>
=2007ApJ...665.1297H 2007ApJ...665.1297H
ADC_Keywords: X-ray sources ; Photometry
Keywords: pulsars: general -
stars: individual (CXOU J181335.1-174957, G12.82-0.02) -
stars: neutron - supernova remnants - X-rays: stars
Abstract:
We present a Chandra X-ray observation of G12.82-0.02, a shell-like
radio supernova remnant coincident with the TeV gamma-ray source HESS
J1813-178. We resolve the X-ray emission from the colocated Advanced
Satellite for Cosmology and Astrophysics (ASCA) source into a point
source surrounded by structured diffuse emission that fills the
interior of the radio shell. The morphology of the diffuse emission
strongly resembles that of a pulsar wind nebula.
Description:
A 30ks X-ray observation of SNR G12.82-0.02 was obtained on 2006
September 15 UT using the Chandra X-Ray Observatory. Data were
collected with the Advanced CCD Imaging Spectrometer (ACIS) in the
focal plane, operating in the nominal full-frame TIMED/VFAINT exposure
mode. This detector is sensitive to X-rays in the 0.3-12.0keV energy
range.
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table1.dat 54 75 Sources in CHANDRA ACIS-I ObsID 6685
--------------------------------------------------------------------------------
See also:
B/chandra : The Chandra Archive Log (CXC, 1999-)
Byte-by-byte Description of file: table1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 2 I2 --- [HGH2007] Sequential number (1)
3 A1 --- n_[HGH2007] [c] Note on [HGH2007] (1)
5- 6 I2 h RAh Right ascension (J2000)
8- 9 I2 min RAm Right ascension (J2000)
11- 16 F6.3 s RAs Right ascension (J2000)
18 A1 --- DE- Declination sign (J2000)
19- 20 I2 deg DEd Declination (J2000)
22- 23 I2 arcmin DEm Declination (J2000)
25- 29 F5.2 arcsec DEs Declination (J2000)
31- 35 F5.1 ct Counts X-ray counts (0.3-10keV)
37- 40 F4.1 ct e_Counts rms uncertainty on Counts
42- 46 F5.2 --- HR Hardness ratio (2)
48 A1 --- l_Rmag Limit flag on Rmag
49- 53 F5.2 mag Rmag ? R magnitude (3)
54 A1 --- u_Rmag Uncertainty flag on Rmag due to blending
--------------------------------------------------------------------------------
Note (1): the note (c) indicates that the USNO-B1.0 catalog counterpart
was used as an astrometric calibrator.
Note (2): Hardness ratio defined as HR=(Nh-Ns)/(Nh+Ns), where Ns and Nh are
the counts measured in the 0.3-2 and 2-10keV energy band, respectively.
Note (3): Blank indicate that a probable optical counterpart exists, but
not measured due to blending.
--------------------------------------------------------------------------------
History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 06-Sep-2009