J/ApJS/197/24 Chandra large-scale extragalactic jets. I. (Massaro+, 2011)
Large-scale extragalactic jets in the Chandra era.
I. Data reduction and analysis.
Massaro F., Harris D.E., Cheung C.C.
<Astrophys. J. Suppl. Ser., 197, 24 (2011)>
=2011ApJS..197...24M 2011ApJS..197...24M
ADC_Keywords: Galaxies, radio ; X-ray sources ; QSOs ; BL Lac objects ;
Redshifts ; Radio continuum
Keywords: galaxies: active - galaxies: jets - radio continuum: galaxies -
radiation mechanisms: non-thermal - relativistic processes -
X-rays: galaxies
Abstract:
In this paper, we report the first stages of an investigation into the
X-ray properties of extragalactic jets (XJET project). Our approach is
to subject all sources for which X-ray emission has been detected by
Chandra to uniform reduction procedures. Using Chandra archival data
for 106 such sources, we measure X-ray fluxes in three bands and
compare these to radio fluxes. We discuss the sample, the reduction
methods, and present first results for the ratio of X-ray to radio
flux for jet knots and hotspots. In particular, we apply statistical
tests to various distributions of key observational parameters to
evaluate differences between the different classes of sources.
Description:
The sample considered for our investigation consists of 106 radio
sources with a published Chandra X-ray detection of a radio knot
and/or hotspot, for a total of 236 components.
All the components identified in our analysis have been previously
discovered as reported in the referenced papers (see Tables 1, 2, and
3) with four exceptions, namely: n46.4 in 3C 109, n3.5, n5.6 in M 84,
and w6.0 in 3C 280, that we detected because in this work we used
Chandra observations with longer exposure than the previous ones.
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table1.dat 92 31 Basic parameters of the (00-08h) sources
considered in the XJET sample (see Section 2)
table2.dat 92 45 Basic parameters of the (08-16h) sources
considered in the XJET sample (see Section 2)
table3.dat 92 30 Basic parameters of the (16-24hr) sources
considered in the XJET sample (see Section 2)
table7.dat 116 236 Radio and X-ray fluxes measured for all
components together with their X/Radio ratios
refs.dat 44 62 References
--------------------------------------------------------------------------------
See also:
B/chandra : The Chandra Archive Log (CXC, 1999-)
VIII/76 : Leiden/Argentine/Bonn (LAB) Survey of Galactic HI (Kalberla+ 2005)
J/ApJ/706/1253 : MOJAVE VII. Blazar jet acceleration (Homan+, 2009)
J/AJ/138/1874 : MOJAVE. VI. Kinematic analysis of blazar jets (Lister+, 2009)
J/AJ/137/3718 : 15GHz monitoring of AGN jets with VLBA (Lister+, 2009)
J/ApJ/686/859 : Radio sources at 0.327, 1.4, 4.5, 8.5GHz (Birzan+, 2008)
J/AJ/133/2357 : Relativistic jets in the RRFID database (Piner+, 2007)
J/ApJS/171/376 : MOJAVE. III. VLA 1.4GHz images (Cooper+, 2007)
J/AJ/131/1262 : Circular polarization images at 15GHz of AGN jets (Homan+,
2006)
J/AJ/130/1418 : AGN jet kinematics (Jorstad+, 2005)
J/AJ/130/1389 : Linear polarization of AGN jets at 15GHz (Lister+, 2005)
J/ApJ/609/539 : Kinematics of parsec-scale radio jets (Kellermann+, 2004)
J/A+A/381/757 : List of extra-galactic radio jets (Liu+, 2002)
J/A+A/298/375 : Jet-disk symbiosis II (Falcke+ 1995)
http://hea-www.harvard.edu/XJET/ : XJET home page
Byte-by-byte Description of file: table1.dat table2.dat table3.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 12 A12 --- Name Galaxy name (G1)
14- 18 A5 --- Class Class of Galaxy (G2)
20- 21 I2 h RAh Hour of right ascension (J2000)
23- 24 I2 min RAm Minute of right ascension (J2000)
26- 31 F6.3 s RAs Second of right ascension (J2000)
33 A1 --- DE- Sign of declination (J2000)
34- 35 I2 deg DEd Degree of declination (J2000)
37- 38 I2 arcmin DEm Arcminute of declination (J2000)
40- 44 F5.2 arcsec DEs Arcsecond of declination (J2000)
46- 51 F6.4 --- z Redshift
53- 59 F7.1 Mpc Dist Luminosity distance (DL; Wright,
2006PASP..118.1711W 2006PASP..118.1711W)
61- 64 F4.2 kpc/arcsec Scale Scale
66- 71 F6.2 10+20cm-2 NH Galactic absorption (NH,Gal; (Kalberla et
al. 2005, Cat. VIII/76))
73- 77 I5 --- ObsId Chandra observation ID
79- 83 F5.2 --- CFS Correction factor for the Galactic absorption
in the soft band (0.5-1keV)
85- 88 F4.2 --- CFM Correction factor for the Galactic absorption
in the medium band (1.0-2.0keV)
90- 92 A3 --- Ref Reference (see refs.dat file)
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table7.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 12 A12 --- Name Galaxy name (G1)
14- 19 A6 --- Comp Component
21- 23 A3 --- Type Knot type (G2)
25 A1 --- Reg [cre] Region size format: circular, rectangular
or elliptical.
27- 30 F4.2 arcsec Reg1 Region size 1 for flux measurement
31 A1 --- --- [x]
32- 35 F4.2 arcsec Reg2 Region size 2 for flux measurement
37- 40 F4.2 GHz nu Radio frequency
42- 49 F8.2 mJy SR Radio flux density at frequency nu
51- 56 F6.2 aW/m2 FS Soft (0.5-1keV) X-ray flux; 10-15cgs
58- 62 F5.3 aW/m2 e_FS Uncertainty in FS
64- 69 F6.2 aW/m2 FM Medium (1-2keV) X-ray flux; 10-15cgs
71- 74 F4.2 aW/m2 e_FM Uncertainty in FM
76- 81 F6.2 aW/m2 FH Hard (2-7keV) X-ray flux; 10-15cgs
83- 87 F5.2 aW/m2 e_FH Uncertainty in FH
89- 94 F6.2 aW/m2 FT Total (0.5-7keV) X-ray flux; 10-15cgs
96-100 F5.2 aW/m2 e_FT Uncertainty in FT
102-108 F7.3 --- X/R X-ray to radio flux ratio ρ (3)
110-116 F7.3 --- e_X/R Uncertainty in rho
--------------------------------------------------------------------------------
Note (3): where ρ=FT/ν*SR and FT is corrected for Galactic absorption.
--------------------------------------------------------------------------------
Byte-by-byte Description of file: refs.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 3 A3 --- Ref Reference code
5- 23 A19 --- BibCode Bibcode
25- 44 A20 --- Aut First author's name
--------------------------------------------------------------------------------
Global notes:
Note (G1): Some galaxy names were fixed at CDS:
* "PG 1222-216" replaced by "PG 1222+216" (table7)
* "PKS 1046-406" replaced by "PKS 1046-409" (table7)
* "1317-520" replaced by "1317+520" (table7).
* "PKS 1229-027" replaced vy "1229-021" (tables 2 and table7)
Note (G2): Class (and knot types) as follows:
BL = BL Lac
QSR = quasar
hsq = hotspot in quasar
CDQ = Core-dominated quasar (35 sources). See Orr & Browne
(1982MNRAS.200.1067O 1982MNRAS.200.1067O).
kqc = knot in core-dominated quasar
LDQ = Lobe-dominated quasar (17 sources). See Orr & Browne
(1982MNRAS.200.1067O 1982MNRAS.200.1067O).
See section 1 for further details.
kql = knot in lobe-dominated quasar
FR I = Radio galaxy with RFR≤0.5 where RFR is the ratio of the distance
between the regions of highest surface brightness on opposite sides of
the central galaxy and/or quasar, to the total extent of the source
up to the lowest brightness contour in the radio map. See Fanaroff &
Riley, 1974MNRAS.167P..31F 1974MNRAS.167P..31F.
k1 = knot in FR I radio galaxy
FR II = Radio galaxy with RFR≥0.5 where RFR is the ratio of the distance
between the regions of highest surface brightness on opposite sides of
the central galaxy and/or quasar, to the total extent of the source
up to the lowest brightness contour in the radio map. See Fanaroff &
Riley, 1974MNRAS.167P..31F 1974MNRAS.167P..31F.
k2 = knot in FR II radio galaxy
--------------------------------------------------------------------------------
History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 12-Jan-2012