II/207A Palomar-Green catalog UV-excess stellar objects (Green+ 1986)
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 1986ApJS...61..305G
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
--------------------------------------------------------------------------------
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 "pg_2009.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 1962BITon...3...37H) see catalog III/74
EG = Eggen and Greenstein (1965ApJ...141...83E 1965ApJ...141...83E, 1967ApJ...150..927E 1967ApJ...150..927E)
T = Tonantzintla lists (1957BOTT....2G...3I 1957BOTT....2G...3I, 1959BOTT....2I...3C 1959BOTT....2I...3C)
U = Usher and collaborators (1981ApJS...46..117U 1981ApJS...46..117U, 1982ApJS...48...51U 1982ApJS...48...51U,
1982ApJS...49...27U 1982ApJS...49...27U, 1984ApJS...56..393H 1984ApJS...56..393H)
K = Kiso UV survey
PB = Palomar-Berger (1977A&AS...28..123B 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 1958ApJ...128..267F)
HZ = Humason-Zwicky (1947ApJ...105...85H 1947ApJ...105...85H)
C,CB = Pesch & Sandyuleak (1983ApJS...51..171P 1983ApJS...51..171P, 1984ApJS...55..517S 1984ApJS...55..517S)
Note (4): Palomar 5m multichannel spectrophotometric indices defined
by Greenstein (1976ApJ...207L.119G 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 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 1980ApJ...238..685G
2 = Graham =1972AJ.....77..144G 1972AJ.....77..144G
3 = Greenstein =1984ApJ...276..602G 1984ApJ...276..602G
4 = Wegner =1983AJ.....88..109W 1983AJ.....88..109W
5 = Liebert & Stockman =1980PASP...92..657L 1980PASP...92..657L
6 = Wesemael et al. =1985ApJS...58..379W 1985ApJS...58..379W
7 = Bond et al. =1984ApJ...279..751B 1984ApJ...279..751B
8 = Ferguson et al. =1981ApJ...251..205F 1981ApJ...251..205F
9 = Margon et al. =1981Natur.293..200M 1981Natur.293..200M
10 = Ferguson et al. =1984ApJ...287..320F 1984ApJ...287..320F
11 = Green et al. =1982PASP...94..560G 1982PASP...94..560G
12 = Becker et al. =1982MNRAS.201..265B 1982MNRAS.201..265B
13 = Penning et al. =1984ApJ...276..233P 1984ApJ...276..233P
14 = Liebert et al. =1982ApJ...256..594L 1982ApJ...256..594L
15 = Liebert et al. =1984ApJ...277..692L 1984ApJ...277..692L
16 = Liebert et al. =1983ApJ...264..262L 1983ApJ...264..262L
17 = Barker & Cudworth =1984ApJ...278..610B 1984ApJ...278..610B
18 = Schmidt & Green =1983ApJ...269..352S 1983ApJ...269..352S
19 = Weymann et al. =1980Natur.285...64W 1980Natur.285...64W
20 = Ellis et al. =1984PASP...96..283E 1984PASP...96..283E
21 = Sion et al. =1985ApJ...292..477S 1985ApJ...292..477S
22 = Sion et al. =1985ApJ...292..471S 1985ApJ...292..471S
23 = Szkody et al. =1985ApJ...293..321S 1985ApJ...293..321S
24 = McGraw et al. =1979IAUCo..53..377M 1979IAUCo..53..377M
25 = Winget et al. =1984IAUC.3932.....W 1984IAUC.3932.....W
26 = Winget et al. =1984ApJ...279L..15W 1984ApJ...279L..15W
27 = Nather et al. =1984IAUC.4021.....N 1984IAUC.4021.....N
28 = Green =1976PASP...88..665G 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 2003AJ....125..984M, I/284)
B = Bordeaux meridian circle (2006A&A...448.1235D 2006A&A...448.1235D, I/300)
C = Carlsberg meridian circle, CMC14 (I/304)
g = GSC-2.3 (2006yCat.1305.....S 2006yCat.1305.....S, I/305)
L = Lepine LSPM (2005AJ....129.1483L 2005AJ....129.1483L, I/298)
M = 2MASS (2006AJ....131.1163S 2006AJ....131.1163S, II/246)
S = SDSS DR6 (2008ApJS..175..297A 2008ApJS..175..297A, II/292)
s = Skiff estimate ± 1"
T = Tycho-2 (2000A&A...357..367H 2000A&A...357..367H, I/259)
U = UCAC2 (2004AJ....127.3043Z 2004AJ....127.3043Z, I/289)
- = "other", mostly VLBI ICRF sources (2004AJ....127.3587F 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 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 "pg_2009.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"
(End) Heinz Andernach, Francois Ochsenbein, Brian Skiff 14-Apr-2009