II/108 Two-Micron Sky Survey, Nearest SAO Stars on POSS (Nagy 1983)
The Two-Micron Sky Survey: Nearest SAO Star and Locations on Palomar Sky Survey
Prints
Nagy T.A., Hill R.S., and Mead J.M.
ADC_Keywords: Infrared sources ; Photometry, infrared ; Surveys
Description:
This catalog is a list of potential guide stars developed for a program to
obtain more precise positions of objects in the IRC Two-Micron Sky Survey of
Neguebauer and Leighton (1969). For each IRC source (col. 1), it gives:
(col. 2) the identification of the star in the SAO catalog which is nearest,
(col. 3) the great circle arc distance (in seconds) between the SAO star and
the IRC source, (col. 4) the position angle (in degrees) of the IRC source
relative to the SAO star, (col. 5) the plate number(s) of the POSS on which
the IRC source appears, (col. 6,7) the approximate rectangular coordinates
(in mm) of the IRC source on the POSS print area with respect to the
Southwest corner, and (col. 8) the modified Luyten Palomar number. The POSS
plate numbers given are for the red plates.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
data.dat 49 6817 Catalog Data
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Byte-by-byte Description of file: data.dat
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Bytes Format Units Label Explanations
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3-8 I6 --- ID ? IRC Number from Two-Micron Sky Survey
11-16 I6 --- SAO *? ID of Closest SAO Star to IRC Source
19-22 I4 arcsec D *? Great Circle Arc Distance between SAO and IRC
25-27 I3 deg PA *?=0 Position Angle of IRC Relative to SAO Source
30-33 A4 --- POSS *POSS Plate ID
36-38 I3 mm X *Rectangular Coordinate on POSS Print Area
41-43 I3 mm Y Rectangular Coordinate on POSS Print Area
47-49 I3 --- MLP *Modified Luyten Palomar Number
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Note on SAO:
This datum is from the MATCH output data file.
Note on D:
The published positions from the individual source catalogues are
the data inputs to the MATCH program. Proper motion effects are
not incorporated into the MATCH program.
Note on PA:
The angle is measured from North through East according to the
standard convention. This quantity was computed from the published
Epoch 1950.0 source positions.
Note on POSS:
The POSS plate ID for the plate area on which the IRC object
appears. The plate IDs include the Palomar (Arabic numeral
preceded by the letter S) and Whiteoak (IDs from 7000-9999)
Southern Extensions. If an object appears on more than one POSS
print area, a multiple listing is given for each print area on
which the given object appears.
The POSS Designations in this table are for the red plates. There
are four different blue and red numbers as given below:
POSS-E POSS-O MLP
9 10 465
14 15 469
15 16 472
11 12 473
Note on X:
The values are measured with respect to the Southwest corner of
the print area. The center of the print area is:
X = 172.5
Y = 173.5
Note on MLP:
This number represents a sequential numbering of the POSS plus
Whiteoak plate areas (range 1-1037). The overall sequence is
from North to South; within each declination band it is by
increasing Right Ascension. Therefore, plate 1 is at the North
Pole and plate 1037 is at the Southern limit of the Whiteoak
extension. This numbering scheme also takes into account the
nearly duplicate POSS plate areas (895 and 1619) which correspond
to MLP numbers 723 and 724 respectively. Since the two plate
centers are almost identical, when a source is assigned to one
of the plates, typically it is assigned to both.
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References:
Haramundus K.L. 1966, Smithsonian Astrophysical Observatory Star Catalog
(SAO), Smithsonian Institution, Washington, D.C., Smithsonian
Publication 4652.
Neugebauer G. and Leighton R.B. 1969, Two-Micron Sky Survey, NASA
SP-3047
(End) Julie Anne Watko [SSDOO/ADC] 03-Nov-1995