ACDS V10.0 - Mon Apr 22 14:41:23 CEST 2019
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Detailed Description of II/207A : Palomar-Green catalog UV-excess stellar objects (Green+ 1986)
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Note : this is the description file of the original catalog.
This HTML page corresponds well to the original description, but some minor
changes in the format may have been introduced in the FITS output
files in order to allow for arithmetic operations on quantities
such as coordinates and times. h:m:s and d:m:s units are normally
converted into degrees, and YYYY-MM-DD into julian days.
Similarly, some slight changes may have been introduced in the
units; the value given in the HTML files supersedes the value indicated in the ReadMe
file for this catalogue.
II/207A Palomar-Green catalog UV-excess stellar objects (Green+ 1986)
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The Palomar-Green catalog of ultraviolet-excess stellar objects.
Green R.F., Schmidt M., Liebert J.
<Astrophys. J. Suppl. Ser. 61, 305 (1986)>
=1986ApJS...61..305G
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ADC_Keywords: Ultraviolet ; Photometry, UBV ; Photometry, uvby ; Blue objects
Keywords: photometry - quasars - stars: faint blue -
stars: spectral classification - stars: stellar statistics -
stars: subdwarfs - stars: white dwarfs
Description:
The Palomar-Green Catalogue of UV-excess stellar objects provides
positions accurate to about 8arcsec in each coordinate, photographic
B-magnitudes accurate to 0.29mag, spectral types, some
cross-references, and photoelectric broad-band, multichannel, and
Stroemgren colors when available.
Of the 1874 objects in the catalogue as published in 1986 (1878 in
this version), 1715 comprise a statistically complete sample covering
10714 square degrees from 266 fields taken on the Palomar 18-inch
Schmidt telescope. Limiting magnitudes vary from field to field,
ranging from 15.49 to 16.67. The overall completeness is estimated to
be 84%, but that figure and the relative contributions of magnitude,
color, and accidental errors vary depending on the magnitude and color
distribution of the spectroscopic subsample.
File Summary:
FileName Lrecl Records Explanations
× 80 . This file
× ReadMe 80 . This file
× catalog.dat 144 1878 *Palomar-Green Survey Data (Table 5)
× pg_pos.dat 135 1878 *Accurate positions by B. Skiff
× pg_2009.txt 80 157 Short history of "pg_pos.dat" file.
Note on catalog.dat: it may differ slightly from the published version as
updates have been incorporated by the authors as new information
became available.
Note on pg_pos.dat: file added in April 2009, from B. Skiff; more details
in the "History" section below, and in the file "II/207A/pg2009.txt|pg2009.txt>".
See also:
II/223 : First Byurakan Survey (FBS), 2nd Program (Abrahamian et al., 1996)
J/AJ/111/645 : Morphology of Bright Quasars of this list (Fabian+ 1996)
J/A+A/250/370 : Far-UV excess object survey (Bixler+ 1991)
J/ApJS/156/47 : DA white dwarfs from the Palomar Green Survey (Liebert+, 2005)
Byte-by-byte Description of file: catalog.dat
Bytes Format Units Label Explanations
1- 2 A2 --- --- [PG]
4- 12 A9 --- PG PG name (1)
14- 15 I2 h RA50h Published Right Ascension 1950 (hours)
17- 18 I2 min RA50m Published Right Ascension 1950 (minutes)
20- 23 F4.1 s RA50s Published Right Ascension 1950 (seconds)
25 A1 --- DE50- Published Declination 1950 (sign)
26- 27 I2 deg DE50d Published Declination 1950 (degrees)
29- 30 I2 arcmin DE50m Published Declination 1950 (minutes)
32- 33 I2 arcsec DE50s Published Declination 1950 (seconds)
36- 40 F5.2 mag Pmag Photographic magnitude, accuracy 0.29mag
43- 47 F5.2 mag Blim []?=0. Limiting magnitude of field (2)
50- 58 A9 --- Comment Other names, redshift or spectral type (3)
60- 64 A5 --- Class Spectral classification
66 A1 --- n_Class [*] a high dispersion spectrum exists
68- 72 F5.2 mag Bmag ? Photoelectic Johnson's magnitude
73 A1 --- u_Bmag Uncertainty flag (:) on Bmag
74- 78 F5.2 mag U-B ? Photoelectic Johnson's colour index
79 A1 --- u_U-B Uncertainty flag (:) on U-B
80- 84 F5.2 mag B-V ? Photoelectic Johnson's colour index
87- 91 F5.2 mag vmag ? Palomar photometric index (4)
92 A1 --- u_vmag Uncertainty flag (:) on vmag
93- 97 F5.2 mag u-v ? Palomar photometric index (4)
98 A1 --- u_u-v Uncertainty flag (:) on u-v
99-103 F5.2 mag b-v ? Palomar photometric index (4)
105-109 F5.2 mag g-r ? Palomar photometric index (4)
111 I1 --- --- ? Unexplained number
114-118 F5.2 mag Vmag ? V magnitude in Stroemgren system (5)
120-124 F5.2 mag b-y ? Colour in Stroemgren system (5)
125 A1 --- u_b-y Uncertainty flag (:) on b-y
126-130 F5.2 mag u-b ? Colour in Stroemgren system (5)
131 A1 --- u_u-b Uncertainty flag (:) on u-b
132-136 F5.2 mag m1 ? Index (v-b)-(b-y) in Stroemgren system (5)
138-144 A7 --- Refs [0-9, ] References (6)
Note (1): This name did not exist in the original table, but appear as a
caption in the finding charts; it has been built from RAh, RAm, DE-,
DEd and a digit representing the rounded part of DEm, checked against
the name used in the finding charts; in a few cases a suffix was added
in case of name collision (see details in the "History" section below)
Note (2): if the object was found in overlapping fields, Blim indicates
the deeper exposure. A value of 0. means that the object is not
part of the complete statistical sample, which can be due to
faintness, undetection in automated scanning process, or presence
in a field with abnormally bright Blim.
Note (3): this column contains redshifts for extragalactic sources,
spectral types for companions to the blue stars, and brief notes
about spectral peculiarities or uncertainties. It contains also
cross-identifications of the objects.
For white dwarfs, see the McCook & Sion catalog III/129
For PHL (Palomar-Haro-Luyten, 1962BITon...3...37H) see catalog III/74
EG = Eggen and Greenstein (1965ApJ...141...83E, 1967ApJ...150..927E)
T = Tonantzintla lists (1957BOTT....2G...3I, 1959BOTT....2I...3C)
U = Usher and collaborators (1981ApJS...46..117U, 1982ApJS...48...51U,
1982ApJS...49...27U, 1984ApJS...56..393H)
K = Kiso UV survey
PB = Palomar-Berger (1977A&AS...28..123B)
L,LB = Luyten lists (Univ. Minnesota)
G,GD = Giclas Proper Motion Survey (see cats. I/79, I/112)
F = Feige (1958ApJ...128..267F)
HZ = Humason-Zwicky (1947ApJ...105...85H)
C,CB = Pesch & Sandyuleak (1983ApJS...51..171P, 1984ApJS...55..517S)
Note (4): Palomar 5m multichannel spectrophotometric indices defined
by Greenstein (1976ApJ...207L.119G) centered at
u=2.80um-1, g=2.12um-1, v=2.12um-1, r=1.44um-1 (wavenumbers micron-1)
and calibrated in the AB79 system by Oke & Gunn (1983ApJ...266..713O)
Note (5): See a description of Stroemgren system in Geneva
General Catalog of Photometric Data <GCPD/04>
Note (6): The values without citations are based on the authors'
measurements. Otherwise the numbers refer to the following papers:
1 = Green =1980ApJ...238..685G
2 = Graham =1972AJ.....77..144G
3 = Greenstein =1984ApJ...276..602G
4 = Wegner =1983AJ.....88..109W
5 = Liebert & Stockman =1980PASP...92..657L
6 = Wesemael et al. =1985ApJS...58..379W
7 = Bond et al. =1984ApJ...279..751B
8 = Ferguson et al. =1981ApJ...251..205F
9 = Margon et al. =1981Natur.293..200M
10 = Ferguson et al. =1984ApJ...287..320F
11 = Green et al. =1982PASP...94..560G
12 = Becker et al. =1982MNRAS.201..265B
13 = Penning et al. =1984ApJ...276..233P
14 = Liebert et al. =1982ApJ...256..594L
15 = Liebert et al. =1984ApJ...277..692L
16 = Liebert et al. =1983ApJ...264..262L
17 = Barker & Cudworth =1984ApJ...278..610B
18 = Schmidt & Green =1983ApJ...269..352S
19 = Weymann et al. =1980Natur.285...64W
20 = Ellis et al. =1984PASP...96..283E
21 = Sion et al. =1985ApJ...292..477S
22 = Sion et al. =1985ApJ...292..471S
23 = Szkody et al. =1985ApJ...293..321S
24 = McGraw et al. =1979IAUCo..53..377M
25 = Winget et al. =1984IAUC.3932.....W
26 = Winget et al. =1984ApJ...279L..15W
27 = Nather et al. =1984IAUC.4021.....N
28 = Green =1976PASP...88..665G
Byte-by-byte Description of file: pg_pos.dat
Bytes Format Units Label Explanations
1- 2 A2 --- --- [PG]
4- 12 A9 --- PG PG name, as in file "catalog.dat"
16- 17 I2 h RAh Right Ascension J2000 (hours)
19- 20 I2 min RAm Right Ascension J2000 (minutes)
22- 26 F5.2 s RAs Right Ascension J2000 (seconds)
28 A1 --- DE- Declination J2000 (sign)
29- 30 I2 deg DEd Declination J2000 (degrees)
32- 33 I2 arcmin DEm Declination J2000 (minutes)
35- 38 F4.1 arcsec DEs ? Declination J2000 (seconds)
40 A1 --- s [BbCgLMSsTU?-] Source of position (1)
42- 45 F4.1 mag Vmag1 ? V or U magnitude rounded to 0.1mag
(blank for the 2 lost stars)
47 A1 --- n_Vmag1 [VU] Filter of Vmag1
50- 58 A9 --- Class1 Spectral classification, mainly from
catalog.dat file.
61-135 A75 --- Comment1 cross-identifications and comments
from B. Skiff
Note (1): position sources as follows:
b = USNO-B1.0 (2003AJ....125..984M, I/284)
B = Bordeaux meridian circle (2006A&A...448.1235D, I/300)
C = Carlsberg meridian circle, CMC14 (I/304)
g = GSC-2.3 (2006yCat.1305.....S, I/305)
L = Lepine LSPM (2005AJ....129.1483L, I/298)
M = 2MASS (2006AJ....131.1163S, II/246)
S = SDSS DR6 (2008ApJS..175..297A, II/292)
s = Skiff estimate ± 1"
T = Tycho-2 (2000A&A...357..367H, I/259)
U = UCAC2 (2004AJ....127.3043Z, I/289)
- = "other", mostly VLBI ICRF sources (2004AJ....127.3587F, J/AJ/127/3587)
? = the two 'lost' sources
Nomenclature Notes:
PG : the name is based on 1950 position. The first list of
PG objects was presented by Green R.F., Greenstein J.L.,
and Boksenberg A. (1976PASP...88..598G)
Acknowledgements:
Thanks to Richard Green (noao.edu) for supplying an electronic
version of his catalogue to H. Andernach in March 1994
History:
* 26-Sep-1996: First version, from Richard Green via Heinz Andernach.
* 17-Oct-1997: for PG 1535+547, in column "Comment", the cross-
identification I Zw 120 changed to I Zw 121 (H. Andernach)
* 30-Dec-2002: the PG names were checked against the names found
in the finding charts of the publication; 3 PG names were corrected
for PG 0149+137, PG 0900+401 and PG 0902+057
* 14-Apr-2009 (version II/207A):
file 'pos.dat' with precise coordinates and comments by Brian Skiff
(Lowell Obs.); see the history of this new file in "II/207A/pg2009.txt|pg2009.txt>".
In the main catalog, duplicate names corrected: second occurence of
PG 2204+071 corrected into PG 2204+070, and a suffix (a or b) was
added to PG 1012+008, PG 1536+097, and PG 1610+239.
* 20-Aug-2016: position of PG 2239+043 recovered, fixed in file "pg_pos.dat"
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(End) Heinz Andernach, Francois Ochsenbein, Brian Skiff 14-Apr-2009