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I/112 Lowell Proper Motion Survey - Southern Hemisphere (Giclas+ 1978)
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Lowell Proper Motion Survey - Southern Hemisphere Catalog 1978
Giclas H.L., Burnham Jr. R., Thomas N.G.
<Lowell Observatory Bulletin No. 164, (1978)>
=1978LowOB...8...89G
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ADC_Keywords: Positional data ; Proper motions
Description:
This catalog contains a summary of the Lowell Proper Motion Survey for
the southern hemisphere as completed to mid-1978. The catalog gives
the position, motion, magnitude, and color of 2758 stars from the
Lowell program.
Introduction:
The material from which this catalog has been prepared is drawn from
Lowell Observatory Bulletins, in which the data have been published
from 1958 to 1978. The number of the specific Lowell Bulletin where
the object was first identified and measured and a finding chart given
is given in the eighth column of the catalog under the heading CHT.
The first epoch plates were taken in connection with the
trans-Neptunian planet search beginning late in the year 1929. The
second epoch matching plates were taken as the blinking and measuring
progressed, Therefore the difference in epoch increased from a minimum
of 28 years at the beginning of the survey to 48 years as of the date
of this catalog.
At the inception of the program, a reasonable degree of completeness
could be maintained for motions of 0.27"/year and larger. Later in the
program the limit was lowered to include motions of 0.20"/year and
larger. This catalog, therefore, is a combination of these two limits
of motions; however, the percentage of plate regions with the smaller
motion limit is much greater in this southern hemisphere catalog than
in the northern hemisphere. The four plate regions around the south
galactic pole are all measured to the lower limit of motion.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
south.dat 98 2758 The catalog
acro.dat 332 68 References of used acronyms
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See also:
I/79 : Lowell Proper Motion Survey in Northernern Hemisphere (Giclas+ 1971)
Byte-by-byte Description of file: south.dat
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Bytes Format Units Label Explanations
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1- 8 A8 --- G *Original G number assigned
9 A1 --- flag *[*] Note in the printed catalog
11- 12 I2 h RAh Right ascension hours (Equinox 1950)
14- 15 I2 min RAm Right ascension minutes
17- 18 I2 s RAs Right ascension seconds
21 A1 --- DE- Declination sign (Equinox 1950)
22- 23 I2 deg DEd Declination degrees
25- 28 F4.1 arcmin DEm Declination arcminutes
30- 34 F5.2 arcsec/yr pm *Annual total proper motion
37- 39 I3 deg pmPA *Proper motion position angle
42- 45 F4.1 mag Pmag Estimated Photographic (blue) magnitude
48- 49 I2 --- col *[-1/4]? Color class
52- 95 A44 --- X-id *Other identifications
96- 98 I3 --- LOBchart *Identification chart reference
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Note on G:
Byte 1 of the field always contains a G and byte 5 always contains
a -. The number in bytes 2-4 is the plate number, while that in
bytes 6-8 is the star number on the plate.
Original G number assigned to the star on the plate region where it
was first found. Stars that were subsequently found on later plates
were assigned new G numbers; however, in this catalog all duplicate
observations have been combined and averaged with the original G
numbers retained. In cases where a close companion has been found on
a later plate, the source of a finding chart prepared from that plate
may be found in the identification chart field (ref2). When the
catalog entry is a mean formed from two or more observations, the
additional stars making up the mean are listed first in the
References field (ref).
Note on flag:
An asterisk (*) indicates that a note concerning the star appears in
the Bulletin in which it was first published.
The reference to the original report of the motion is as follows:
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Volume Page No. Year G Region
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IV 136 102 1959 G1 -G50
V 61 112 1961 G51 -G100
VI 1 120 1964 G101-G150
VI 103 122 1964 G151-G160
VI 135 124 1964 G161-G170
VII 217 158 1972 G266-G269
VII 273 160 1973 G270-G271
VIII 9 162 1975 G272-G273
VIII 59 163 1978 G274-G275
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Note on pm:
The annual proper motion in seconds of arc. The proper-motion vector
is defined by the equation:
pm = (mu(alpha)**2*cos(delta)**2+mu(delta)**2)**0.5
Note on pmPA:
The position angle of the reported motion in the usual notation from the
north point through east, 0deg. to 360deg.. The position angle of pm is
defined by the following set of equations:
mu(alpha)*cos(delta) = pm*sin(pmPA); mu(delta) = mu*cos(pmPA)
Note on col:
The estimated color class is on a scale from -2 (the bluest) to +4
(the very reddest) stars found. Almost all stars of color classes
-2 and -1 have been subsequently identified from photometry or
spectra as white dwarfs.
Because there is such a wide variety of different types of objects among
these motions, it is impossible to define a narrow relationship between
these color classes and the conventional B-V and U-B colors. The table
below is given with the warning that the true color of any one
individual star may deviate from the mean value by as much as half a
magnitude for stars redder than color class 0.
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Color Class B-V U-B
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-1 +0.11 -0.74
0 +0.26 -0.57
+1 +0.80 +0.33
+2 +1.30 +1.09
+3 +1.61 +1.18
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Note on X-id:
Catalog entries are, in many cases, the combined means of measurements
on two or more plate regions; in these cases, the additional G
number(s) appear as the first entry(ies) in the Reference field. If a
G number in the references carries an asterisk, but the field
following the identification field (byte 9) does not, then the note on
that star appears only in the Lowell Observatory Bulletin where the
latter number was published. Following the G numbers, references to
other proper-motion lists and catalogs are given, as identified in the
reference key in the appendix of this document.
Note on LOBchart:
The Lowell Bulletin number in which an identification chart of size 18
minutes of arc on a side is given for the star.
The summary catalog was compiled from collections of data appearing in
earlier Lowell Observatory Bulletins. There are no finding charts in
the source reference, but they can be found in the original references
given in the table of the Note on n_ID.
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Byte-by-byte Description of file: acro.dat
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Bytes Format Units Label Explanations
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1- 17 A17 --- Acronym *Designation of catalog or list
20 A1 --- Sep [=:] original list (=) or supplement (:)
22-332 A311 --- Text Text of Reference
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Note on Acronym:
The references to other proper-motion catalogs and lists are
identified by character prefixes, followed by the numerical
designations of the objects in a catalog or list, according to
standard astronomical usage. The prefixes are identified with their
corresponding references. (Note: Not all of the identifiers
listed actually appear in the catalog. The key is repeated from the
Lowell Proper Motion Survey, Northern Hemisphere (Giclas, Burnham,
and Thomas 1971) and some identifiers may only appear in that
catalog.)
Reference Sources (= in column Sep)
The bibliographical sources that provided information for the catalog
consist of references for the star designations in other catalogs and
lists, plus references for general information. The general
references are combined with some supplementary identification
references in the source publications and that order has not been
changed in the following sections. The information given below
appears in the source reference and is repeated here for users who do
not have ready access to that publication.
Supplementary References (: in column Sep)
The supplementary references include sources of some identifiers used in
the catalog, plus general reference sources consulted during preparation
of the catalog.
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Acknowledgements:
A tape copy of the G-numbered stars was kindly supplied by
H.L. Giclas to CDS in January 1985.
References:
Giclas H.L., Burnham JR. R., and Thomas N. G. 1971, Lowell Proper
Motion Survey, Northern Hemisphere, The G Numbered Stars (Flagstaff:
Lowell Observatory).
Giclas H.L., Burnham Jr. R., and Thomas N. G. 1978, Lowell Proper
Motion Survey, Southern Hemisphere Catalog 1978, Lick Obs. Bull.
No. 164.
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(End) Julie Anne Watko [SSDOO/ADC] 08-Dec-1995