J/ApJS/235/32 The 3CR Chandra snapshot survey: 1<z<1.5 (Stuardi+, 2018)
The 3CR Chandra snapshot survey: extragalactic radio sources with redshifts
between 1 and 1.5.
Stuardi C., Missaglia V., Massaro F., Ricci F., Liuzzo E., Paggi A.,
Kraft R.P., Tremblay G.R., Baum S.A., O'Dea C.P., Wilkes B.J.,
Kuraszkiewicz J., Forman W.R., Harris D.E.
<Astrophys. J. Suppl. Ser., 235, 32-32 (2018)>
=2018ApJS..235...32S 2018ApJS..235...32S (SIMBAD/NED BibCode)
ADC_Keywords: Active gal. nuclei; Radio continuum; X-ray sources; Redshifts
Keywords: galaxies: active; radio continuum: galaxies; X-rays: general
Abstract:
The aim of this paper is to present an analysis of newly acquired
X-ray observations of 16 extragalactic radio sources listed in the
Third Cambridge Revised (3CR) catalog and not previously observed by
Chandra. Observations were performed during Chandra Cycle 17,
extending X-ray coverage for the 3CR extragalactic catalog up to
z=1.5. Among the 16 targets, two lie at z<0.5 (3CR 27 at z=0.184 and
3CR 69 at z=0.458); all of the remaining 14 have redshifts between 1.0
and 1.5. In the current sample, there are three compact steep spectrum
(CSS) sources, three quasars, and an FR I radio galaxy, while the
other nine are FR II radio galaxies. All radio sources have an X-ray
counterpart. We measured nuclear X-ray fluxes as well as X-ray
emission associated with radio jet knots, hotspots, or lobes in three
energy bands: soft (0.5-1keV), medium (1-2keV), and hard (2-7keV). We
also performed standard X-ray spectral analysis for the four brightest
nuclei. We discovered X-ray emission associated with the radio lobe of
3CR 124, a hotspot of the quasar 3CR 220.2, another hotspot of the
radio galaxy 3CR 238, and the jet knot of 3CR 297. We also detected
extended X-ray emission around the nuclear region of 3CR124 and 3CR297
on scales of several tens of kiloparsecs. Finally, we present an
update on the X-ray observations performed with Chandra and XMM-Newton
on the entire 3CR extragalactic catalog.
Description:
We adopted the data reduction and analysis procedures described in
previous works, so only basic details are reported here (see, e.g.,
Massaro+ 2009ApJ...696..980M 2009ApJ...696..980M & 2011, J/ApJS/197/24 for a complete
description). We compared radio images, ranging from 1.4 to 14.9GHz,
and Chandra observations, searching for a spatial coincidence between
X-ray emission and extended radio structures (i.e., jet knots,
hotspots, or lobes).
Radio images were retrieved from the NVAS (http://data.nrao.edu/portal/)
and the DRAGN (http://www.jb.man.ac.uk/atlas/) web pages. Archival VLA
data analyzed are from project IDs AE0059 (4.85GHz) and AV0164 (8.4GHz)
and were obtained on 1988 October 30 and 1990 May 11, respectively.
See Section 2.1.
The 3CR source sample observed during Cycle 17 is listed in Table 1.
All Chandra observations were performed with the ACIS-S.
See Section 2.2.
A table summarizing the state of the art of the X-ray (i.e., Chandra
and XMM-Newton) observations of 3CR extragalactic sources carried out
to date is also reported; see Appendix B (Table 5).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 100 16 Source list of the Chandra Cycle 17 snapshot
survey of 3CR radio sources
table5.dat 52 298 Summary of the 3CR X-ray observations
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See also:
B/chandra : The Chandra Archive Log (CXC, 1999-2014)
B/xmm : XMM-Newton Obs. Log (XMM-Newton Science Operation Center, 2012)
VIII/1 : The 3C and 3CR Catalogues (Edge+ 1959-1962)
VII/178 : Optical Extragalactic Emission-line Objects (Hewitt+ 1991)
VIII/76 : Leiden/Argentine/Bonn (LAB) Survey of Galactic HI (Kalberla+ 2005)
J/PASP/97/932 : 3CR Source Identifications (Spinrad+, 1985)
J/ApJS/122/81 : HST snapshot survey of 3CR radio sources (Martel+, 1999)
J/AJ/130/23 : Spectrophotometry of 3CR lobe-dominated quasars (Aars+, 2005)
J/ApJS/164/307 : NICMOS observations of 3CR radio sources (Madrid+, 2006)
J/ApJS/177/148 : HST survey of 3CR source counterparts. II. (Floyd+, 2008)
J/ApJS/197/24 : Chandra large-scale extragalactic jets. I. (Massaro+, 2011)
J/A+A/575/A80 : FIR photometry of 3CR galaxies (Podigachoski+, 2015)
J/AJ/151/120 : z<1 3CR radio galaxies & QSOs star formation (Westhues+, 2016)
http://data.nrao.edu/portal/ : NRAO archive home page
http://www.jb.man.ac.uk/atlas/ : Atlas of DRAGNs home page
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 5 A5 --- Name 3CR name
6 A1 --- n_Name [*] Flag on Name (1)
8- 20 A13 --- Class Classification (2)
22- 23 I2 h RAh Hour of right ascension (J2000) (1)
25- 26 I2 min RAm Minute of right ascension (J2000)
28- 33 F6.3 s RAs Second of right ascension (J2000)
35 A1 --- DE- Sign of declination (J2000) (1)
36- 37 I2 deg DEd Degree of declination (J2000) (1)
39- 40 I2 arcmin DEm Arcminute of declination (J2000)
42- 46 F5.2 arcsec DEs Arcsecond of declination (J2000)
48- 52 F5.3 --- z Redshift from NED unless flagged
53 A1 --- n_z [+o] Flag on z (3)
55- 59 I5 Mpc Dist [900/10970] Distance, DL
61- 65 F5.3 --- Scale [3.113/8.599] Scale: kpc to arcsec
67- 71 F5.2 10+20cm-2 NH [1.2/68.5] Galactic neutral hydrogen column
densities NH,Gal (Kalberla+ 2005, VIII/76)
73- 76 F4.1 mag Vmag ? Visual magnitude from NED unless flagged (4)
77 A1 --- n_Vmag [+] +=from Spinrad+ 1985, J/PASP/97/932
79- 82 F4.1 Jy S178 [4.6/26.5] Flux density at 178MHz
(Spinrad+ 1985, J/PASP/97/932)
84- 88 I5 --- ObsID [18090/18105] Chandra observation identifier
90- 100 A11 "Y/M/D" Date Date of observation (UT)
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Note (1): The celestial positions listed are those of the radio cores, which
we used to register the X-ray images, except for the four sources
lacking an obvious radio nucleus: 3CR 27, 3CR 230, 3CR 297, and 3CR 305.1,
labeled with "*" in column n_Name, for which the coordinates are taken
from the NASA/IPAC Extragalactic Database (NED).
Note (2): The "Class" column contains both a radio morphology descriptor
(Fanaroff-Riley class I or II), quasar (QSO), or compact steep
spectrum (CSS) and the optical spectroscopic designation LERG,
"low-excitation radio galaxy," or HERG, "high-excitation radio
galaxy," when present in the literature.
Note (3): Flag on redshift as follows:
o = sources outside the redshift range 1.0<z<1.5
+ = Redshift measurements are taken from Spinrad+ 1985, J/PASP/97/932
Note (4): The value of visual magnitude reported by NED for 3CR 230 is affected
by a star nearby in projection on the sky, and it is not reported here.
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Byte-by-byte Description of file: table5.dat
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Bytes Format Units Label Explanations
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1- 5 A5 --- Name The 3CR name
7- 12 F6.4 --- z ? Redshift (1)
13 A1 --- n_z [?] ?=No redshift available
15- 18 A4 --- Class Source classification (2)
20- 27 A8 --- Morph Radio morphological classification (3)
29- 32 A4 --- OClass Optical spectroscopic designation (4)
34 A1 --- Cl? Cluster flag (5)
36- 38 A3 --- Xray X-ray flag (c=at least one Chandra observation;
x=at least one XMM observation in the archive)
40- 46 A7 --- Chandra Chandra detection? (6)
48- 52 A5 --- XMM XMM detection? (6)
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Note (1): We also verified in the literature (e.g., NED/IPAC or
SIMBAD databases) if updated z values were reported after the release
of the 3CR catalog.
Note (2): Source classification as follows:
RG = radio galaxies (211 occurrences),
QSO = quasars (58 occurrences),
SEY = Seyfert galaxies (2 occurrences),
BL = BL Lac objects (2 occurrences)
UNID = sources that are still unidentified (25 occurrences).
Note (3): FR I and FR II refer to the Fanaroff and Riley classification
criterion (Fanaroff & Riley 1974), while LDQ and CDQ are sometimes
adopted for lobe-dominated and core-dominated quasars; we also
indicated if in the literature the source is classified as CSS or if
the radio structure is X-shaped (XS), or if it is a narrow or wide
angle tailed radio galaxy (NAT and WAT, respectively).
Note (4): Optical spectroscopic designation as follows:
LERG = low-excitation radio galaxy (63 occurrences)
HERG = high-excitation radio galaxy (124 occurrences)
Note (5): The "cluster flag" marks sources for which there is a known optical
group/cluster reported in the literature or those for which there is
an archival X-ray observation indicating the presence of hot gas.
Note (6): In this column we report if the source has a radio component with
an X-ray counterpart in a Chandra/XMM observation.
We used the following labels:
k = jet knot,
h = hotspot,
l = lobe,
e = extended X-ray emission around the nucleus,
igm = emission associated with the presence of hot gas.
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History:
From electronic version of the journal
(End) Emmanuelle Perret [CDS] 20-Oct-2023