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I/199 Lick Northern Proper Motion Program: NPM1 Catalog (Klemola+ 1987)
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Lick Northern Proper Motion Program: NPM1 Catalog
Klemola A.R., Hanson R.B., Jones B.F.
<Astron. J. 94, 501 (1987)>
=1987AJ.....94..501K
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ADC_Keywords: Positional data; Proper motions; Magnitudes, photographic;
Colors; Cross identifications
Description:
The NPM1 catalog is the first part of the Lick Northern Proper Motion
(NPM) program to measure absolute proper motions, on an inertial
system defined by some 50,000 faint galaxies, for some 300,000 stars
over a blue apparent magnitude range from 8 to 18. There are 1246
6-degree by 6-degree fields in the NPM survey (to declination -23
degrees). The NPM1 catalog covers the 72% of the northern sky lying
outside the Milky Way and contains some 149,000 stars from measures
in 899 of the 1246 NPM fields. A second catalog (NPM2) will cover
the NPM Milky Way fields. The Yale Southern Proper Motion (SPM)
program will complete the southern sky. Each NPM field was
photographed at two epochs between 1947 and 1988. The mean first and
second epochs are 1950 and 1977; the average epoch difference is 27
years. The first-epoch plates were taken in the blue only; both blue
and yellow plates were taken at the second epoch. Some 94000 stars were
chosen anonymously for the NPM astrometric reductions and for
statistical studies of stellar motions. In addition, the NPM1 catalog
contains some 28000 positional reference stars, and some 27000 stars
were chosen from the Lick Input Catalog of Special Stars (ICSS).
Positions are given for equinox B1950 and computed epoch 1950. Each
star's entry includes the absolute proper motion and blue magnitude.
For 97% of the stars the color is also given. Other data given for
each star are: the original mean epoch, a stellar class code, the
number of NPM fields measured, and discrepancy flags for position,
proper motion, and photometry. Finally, as an additional
identification, the AGK3 (north) or SAO (south) number (if any) is
given. The rms errors of the NPM absolute proper motions are about
0.5"/cent in each coordinate. The rms position errors at the catalog
epoch 1950 average about 0.15" in each coordinate. The rms errors for
the NPM photographic photometry average about 0.2 mag in B, and 0.15
mag in B-V.
More complete descriptive information is available in the ASCII or LaTeX
documentation written by A.R. Klemola, R.B. Hansen, and R.B. Jones
(UCO/Lick Obs.)
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
npm1.dat 84 148940 The Catalogue
npm1.txt 80 323 ASCII Catalog Description
npm1.tex 80 267 LaTeX Catalog Description
adc.sty 78 68 Style file for npm1.tex
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Byte-by-byte Description of file: npm1.dat
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Bytes Format Units Label Explanations
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1- 8 A8 --- Name [0-9.+-]! NPM1 star "name" made of:
Byte 1 : Sign of declination for this zone
Bytes 2-3: Declination zone
Bytes 4-8: Running number in this
declination zone
10- 11 I2 h RAh Right Ascension B1950 (hours)
13- 14 I2 min RAm Right Ascension B1950 (minutes)
16- 21 F6.3 s RAs Right Ascension B1950 (seconds)
23 A1 --- DE- Declination B1950 (sign)
24- 25 I2 deg DEd Declination B1950 (degrees)
27- 28 I2 arcmin DEm Declination B1950 (minutes)
30- 34 F5.2 arcsec DEs Declination B1950 (seconds)
35- 42 F8.2 arcsec/hyr pmRA Absolute proper motion RA (in "/century)
43- 50 F8.2 arcsec/hyr pmDE Absolute proper motion Dec.
51- 56 F6.2 mag B Photographic photometry (B magnitude)
57- 62 F6.2 mag B-V *?=-9.99 Photographic photometry (B - V color)
63- 68 F6.2 yr Epoch Original mean epoch of position (-1900)
69- 70 I2 --- class *[1,7] Code for class of star
71- 72 I2 --- nfields Number of NPM fields on which star
was measured
74 I1 --- ips *Discrepancy flag Position
75 I1 --- ipm *Discrepancy flag Proper Motion
76 I1 --- ibv *Discrepancy flag Photometry
77- 83 I7 --- icatno *AGK3 and SAO identification
84 A1 --- agksgn *AGK catalog identification
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Note on B-V:
(= -9.99 if no data)
Note on class:
The code is a sum of the following numbers, if applicable.
+1 if anonymous star (faint or bright)
+2 if catalog star (AGK3 or SAO)
+4 if other star (Lick Input Catalog)
Note on ips, ipm and ibv:
As defined in Table 2 of the Document file (npm1.txt)
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Position Proper Motion Photometry
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Flag=0 O.K. O.K. O.K.
Flag=1 R.A. R.A. B
Flag=2 Dec. Dec. B - V
Flag=3 Both Both Both
Flag=9 Error Error Error
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Limits 1.0 arcsec 3.0 arcsec/cent 1.0 mag
Note on icatno:
AGK3 identification for zones +89 to -01
SAO identification for zones -02 to -23
Note on agksgn:
blank if AGK zone = NPM zone
+ if AGK zone = NPM zone + 1
- if AGK zone = NPM zone - 1
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(End) N. Paul M. Kuin and Gail L Schneider [NSSDC/ADC] 22-Nov-1994