J/AJ/111/645 Morphology of Quasars (Fabian+ 1996)
Optical Morphology of Bright Quasars on Images Taken With 1.2 m Schmidt Cameras
Fabian D., Usher P.D.
<Astron. J. 111, 645 (1996)>
=1996AJ....111..645F 1996AJ....111..645F
ADC_Keywords: QSOs ; Morphology
Abstract:
The optical morphology of bright extragalactic objects listed by Green
et al. (1986ApJS...61..305G 1986ApJS...61..305G) is determined on Palomar Observatory Sky
Survey prints. Morphological types are assigned according to whether
objects appear resolved or unresolved. These are plotted in the Hubble
Diagram. When combined with previous results from the Medium-Bright
Quasar Survey (MBQS), objects of redshift z are found to be unresolved
on 1.2m Schmidt telescopes at apparent magnitudes brighter than
B=21-3/4z over a large magnitude range 12.5<B<18.5. A luminosity
cutoff for unresolved objects in this range is found to be M_B=-24,
(H0=50), in agreement with an earlier estimate. Relevance to the
search for large, bright, host galaxies, and for "naked quasar"
candidates, is noted.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 45 164 Morphology of objects listed by Green et al.
(1986ApJS...61..305G 1986ApJS...61..305G, see cat. II/207)
notes.dat 136 33 Notes on individual objects in table 1
table1.tex 79 225 AASTeX version of table1.dat
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See also:
II/207 : Palomar-Green catalog UV-excess stellar objects (Green+ 1986)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 8 A8 --- Object Coordinate-based object name
10- 15 A6 --- EMor *POSS E-print morphology
17- 22 A6 --- OMor *POSS O-print morphology
24- 25 I2 --- Note [1/33]? Note number in notes.dat
27- 29 A3 --- SpId *Spectroscopic identification
31- 36 F6.2 mag Bmag B magnitude from Green et al., cat. II/207
38- 45 F8.5 --- z *? Redshift
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Note on EMor, OMor:
The morphological designations of this paper are:
G, galaxy;
CG, compact galaxy (bright center and faint surrounding nebulosity);
CGNN, a possible compact galaxy but with no nebulosity (a CG decided by shape)
*, starlike (an object indistinguishable from neighbouring stars).
Any of these categories could be accompanied by the letter "C",
meaning that the image is confused with another (usually fainter)
source, while "?" connotes uncertainty.
Note on SpId:
Spectroscopic identifications:
QSO (quasar), Sey (Seyfert galaxy),
BLL (BL Lacertae object), Gal (galaxy).
Note on z:
Redshift from:
Wampler & Ponz (1985ApJ...298..448W 1985ApJ...298..448W)
Green et al. (1986ApJS...61..305G 1986ApJS...61..305G)
Osterbrock & Pogge (1987ApJ...323..108O 1987ApJ...323..108O)
Lipovetsky et al. (1988SoSAO..55....5L 1988SoSAO..55....5L)
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Byte-by-byte Description of file: notes.dat
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Bytes Format Units Label Explanations
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1- 2 I2 --- Note *[1/33] Note number
4- 11 A8 --- Object Coordinate-based object name
13-164 A152 --- Text Text of the note
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Note on Note:
If this field is blank, the data in field Text is a continuation
from the previous record.
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Origin: AAS CD-ROM series, Volume 6, 1996 Lee Brotzman [ADS] 07-Mar-1996
(End) [CDS] 05-Sep-1996