VII/178 Optical Extragalactic Emission-line Objects (Hewitt+ 1991)
An Optical Catalog of Extragalactic Emission-line Objects Similar to
Quasistellar Objects
Hewitt A., Burbidge G.
<Astrophys. J. Suppl. Ser. 75, 297 (1991)>
=1991ApJS...75..297H 1991ApJS...75..297H
ADC_Keywords: Active gal. nuclei
Description:
A catalog of 935 galaxies which have optical properties similar to
those of QSOs is given. A subsidiary table of cross-identifications
enables the reader to relate the name of a given object to its
coordinate name. Most of the objects appear to be nonstellar.
The majority, more than 700, have redshifts z≤0.2, and have mostly
been classified as Seyfert galaxies, N systems, or radio galaxies.
The Hubble diagram for all of the objects with z≤0.2 is shown. The
redshift distribution peaks at z ∼ 0.025, but there are about 200
powerful radio galaxies in the extended tail of the distribution which
have z>0.2. There is a separate and distinct peak in the redshift
distribution at z=0.06.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
catalog.dat 72 935 *Emission-line objects similar to QSOs
names.dat 34 1740 *Names and classifications of the sources
refs.dat 152 339 References to Table 1
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Note on catalog.dat, names.dat:
these two files are derived from Table1 of the paper:
- catalog.dat contains the 935 objects with their redshift (first lines)
- names.dat contains the designations and classifications (second+ lines)
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Byte-by-byte Description of file: catalog.dat
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Bytes Format Units Label Explanations
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1- 8 A8 --- Bname Coordinate designation name
11- 22 A12 --- Name Other names of the object
23- 24 I2 h RAh Right Ascension 1950 (hours)
26- 27 I2 min RAm Right Ascension 1950 (minutes)
29- 33 F5.2 s RAs Right Ascension 1950 (seconds)
36 A1 --- DE- Declination 1950 (sign)
37- 38 I2 deg DEd Declination 1950 (degrees)
40- 41 I2 arcmin DEm Declination 1950 (minutes)
43- 46 F4.1 arcsec DEs Declination 1950 (seconds)
49- 53 F5.2 mag Vmag ? Apparent magnitude; V mag. when available
57- 62 F6.4 --- Zem ? emission redshift
63 A1 --- u_Zem [)] when Zem was within parenthesis (?) (1)
65 A1 --- --- [z]
70- 72 I03 --- r_Zem Reference of redshift
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Note (1): The meaning of u_Zem is not given in the paper.
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Byte-by-byte Description of file: names.dat
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Bytes Format Units Label Explanations
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1- 8 A8 --- Bname Coordinate designation name
11- 22 A12 --- Name Other name of the object
25- 30 A6 --- Class Classification of the source (2)
32- 34 I03 --- r_Class ? Reference of classification
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Note (2): the object types are:
sy : Seyfert galaxy
sy1: Seyfert 1
sy2: Seyfert 2
rg : Radio galaxy
n : Compact galaxy (see Morgan 1958; Matthews, Morgan, and Schmidt (1964)
e : Emission lines present but not necessarily strong
we : Weak emission lines
me : Moderate emission Lines
se : Strong emission lines
See Smith, Spinrad, and Smith (1976PASP...88..621S 1976PASP...88..621S) for more
information concerning the use of e, we, me, and se to characterize
the optical spectra of radio galaxies.
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Byte-by-byte Description of file: refs.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- Ref [1,339]+ Reference number
4 A1 --- --- [.]
6- 24 A19 --- BibCode 19-digit bibcode (when existing)
26-152 A127 --- Text Reference text
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Remarks and Modifications:
The catalogue was provided by the author A.Hewitt to H. Andernach; it
was numbered A122 in H. Andernach's "List of Astronomical Catalogues
and Documents kindly provided on request by various authors".
Three differences were found between the "table1.dat" file and the
Table 1 of the published version of the paper. The differences were
corrected in the electronic file to agree with the published table.
It is possible that some differences still remain.
* 24-Nov-1993: First archived in J/ApJS/75/297/.
* 28-Jan-1994: Prepared by Koichi Nakajima [CDS] as Cat. J/ApJS/75/297
* 14-Feb-1994: Seconds of the declination of 0003-503 corrected
Moved to VII/178/.
* 03-Jul-1997: ReadMe standardized at SSDOO/ADC
(Gail L. Schneider, and G.A. Reichert)
* 25-Jul-2004: table1 was split in two parts (catalog and names)
at CDS (Francois Ochsenbein); bibcodes were added
in the reference file (refs.dat)
(End) Koichi Nakajima (28-Jan-1994), Francois Ochsenbein [CDS] 25-Jul-2004