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I/277 SPM Catalog 2.0 (Platais+ 1998)
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Yale/San Juan Southern Proper Motion Program:
-20 to -40{deg} zones including the South Galactic Pole Region
Platais I., Girard T.M., Kozhurina-Platais V., van Altena W.F., Lopez C.E.,
Mendez R.A., Ma W.-Z., Yang T.-G., MacGillivray H.T., Yentis D.J.
<Astron. J. 116, 2556 (1998)>
=1998AJ....116.2556P
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ADC_Keywords: Positional data ; Proper motions ; Photometry, photographic ;
Photometry, CCD
Keywords: astrometry - catalogs - stars: kinematics
Description:
The SPM Catalog 2.0 provides positions, absolute proper motions and
photographic BV photometry for over 320,000 stars and galaxies. The
Catalog covers an area of ~3700 square degrees in an irregularly
bounded band between declinations of -43 and -22 degrees, with a
slight extension near the South Galactic Pole, but excluding fields in
the plane of the Milky Way. Stars cover the magnitude range 5<V<18.5.
The standard errors for the best measured stars are as follows: 20 mas
for positions in each coordinate; 2mas/yr for absolute proper motions
and 0.05mag for B and V magnitudes. Standard error estimates of
positions, absolute proper motions and magnitudes are given for each
individual object. In addition to the Catalog, a list of CCD
calibrating sequences is provided.
Note that all fields (and objects) contained in the 1.0 version of the
Catalog are also included in this version. The values of the
astrometric parameters for these objects, however, may be different
due to refinements in the reduction procedure, (i.e. the SGP fields
were re-reduced for inclusion in the SPM catalog 2.0).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
readme.ori 80 374 Original description
spmcat.dat 129 321608 Catalog of positions, proper motions and BV
photographic photometry in the area around the
South Galactic Pole
spmccd.dat 42 7783 A list of CCD photometry used for magnitude
calibration in the SGP area
spmfld.dat 63 156 Basic information on the SPM fields/plates used
to create the Catalog
spmids.txt 31 262150 Cross-identifications with special catalogs and
object numbers for the selected samples of stars
spmpar.txt 33 71 A list of parameters used to make identifications
with special catalogs
spmspe.txt 79 77 A list of all special catalogs and selected
samples of stars
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See also:
I/177 : Catalogue of proper motions in NGC 752 (Platais, 1992)
I/178 : Catalogue of proper motions in NGC 7209 (Platais, 1992)
I/203 : Proper Motions, UBV-Phot. Spectral Class Region 7092 (Platais 1994)
I/212 : Proper motions in NGC 3680 (Kozhurina-Platais+, 1995)
J/AJ/122/1486 : NGC 2451A proper motions and membership (Platais+, 2001)
Byte-by-byte Description of file: spmcat.dat
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Bytes Format Units Label Explanations
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1- 8 I8 --- SPM Object identifier (1)
10- 11 I2 h RAh Right ascension for the epoch J1991.25 and in
the ICRS reference system (i.e. equinox 2000)
13- 14 I2 min RAm Right ascension for the epoch J1991.25 and in
the ICRS reference system (i.e. equinox 2000)
16- 21 F6.3 s RAs Right ascension for the epoch J1991.25 and in
the ICRS reference system (i.e. equinox 2000)
23 A1 --- DE- Declination sign (2000)
24- 25 I2 deg DEd Declination for the epoch J1991.25 and in the
ICRS reference system (i.e. equinox 2000)
27- 28 I2 arcmin DEm Declination for the epoch J1991.25 and in the
ICRS reference system (i.e. equinox 2000)
30- 34 F5.2 arcsec DEs [0/60] Declination for the epoch J1991.25 and in
the ICRS reference system (i.e. equinox 2000)
36- 45 F10.6 deg RAdeg Right ascension in decimal degrees (2000)
47- 56 F10.6 deg DEdeg Declination in decimal degrees (2000)
57- 60 I4 mas e_RAdeg Estimated standard error in right ascension
multiplied by cos(DEC).
61- 64 I4 mas e_DEdeg Estimated standard error in declination
66- 72 F7.1 mas/yr pmRA Absolute proper motion in right ascension
multiplied by cos(DEC).
74- 80 F7.1 mas/yr pmDE Absolute proper motion in declination
81- 85 F5.1 mas/yr e_pmRA Estimated standard error in right ascension's
absolute proper motion.
86- 90 F5.1 mas/yr e_pmDE Estimated standard error in declination's
absolute proper motion.
92- 96 F5.2 mag Vmag ?=0.00 Photographic V-magnitude
(if missing then set to 0.00)
98-102 F5.2 mag Bmag ?=0.00 Photographic B-magnitude
(if missing then set to 0.00)
104-108 F5.2 mag B-V ?=0.00 B-V color (if either of V or B is missing
then set to 0.00).
109-111 I3 0.01mag e_Vmag Estimated standard error in V- magnitude
112-114 I3 0.01mag e_Bmag Estimated standard error in B- magnitude
118 I1 --- Nfie Number of SPM fields on which the object was
measured.
120-121 I2 --- o_Bmag Number of images used in astrometric reductions
from a blue plate in each epoch (2)
123-124 I2 --- o_Vmag Number of images used in astrometric reductions
from a visual plate in each epoch (2)
126 A1 --- F1 [HT] Flag "H" indicates a Hipparcos star;
flag "T" indicates a Tycho star if it is
not already a Hipparcos star
127 A1 --- F2 [GKQ] Selection flag (3)
128 A1 --- F3 [AS] Specific flag (4)
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Note (1): First three digits indicate the SPM field number. The remaining
digits are the running number in the SPM input file.
Note (2): Each first and second order grating-image pair counted as one image
Note (3): the flags have the following meaning:
Flag "G" indicates visually confirmed galaxy;
Flag "K" indicates a randomly selected star.
Note that star selections 011 and 054 also share that flag;
Flag "Q" indicates a possible QSO drawn from the following special
catalogs: 022,027,042,052 (see spmspe.txt).
Note (4): the flags have the following meaning:
Flag "S" indicates a special star taken from a selected catalog or list.
Flag "A" indicates a star which was chosen in some specified area down
to a specified magnitude limit.
This includes special catalogs: 012,024,037,050,055 (see spmspe.txt).
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Byte-by-byte Description of file: spmccd.dat
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Bytes Format Units Label Explanations
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1- 8 I8 --- SPM Object number (1)
10- 19 F10.6 deg RAdeg Right ascension (2000) (2)
21- 30 F10.6 deg DEdeg Declination (2000) (2)
32- 36 F5.2 mag Vmag V-magnitude from CCD photometry
38- 42 F5.2 mag B-V B-V color from CCD photometry
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Note (1): First three digits indicate the SPM field number.
The remaining digits are the running number in the SPM input file.
Note (2): Positions for the epoch 1991.25 and in the ICRS reference system
(copied from the Catalog file spmcat.dat)
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Byte-by-byte Description of file: spmfld.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- SPM The SPM field number (1)
5- 6 I2 h RAh Field center right ascension (J2000)
8- 9 I2 min RAm Field center right ascension (J2000)
11- 15 F5.2 s RAs Field center right ascension (J2000)
17 A1 --- DE- Sign of declination (J2000)
18- 19 I2 deg DEd Field center declination (J2000)
21- 22 I2 arcmin DEm Field center declination (J2000)
24- 27 F4.1 arcsec DEs Field center declination (J2000)
32- 41 A10 "DD/MM/YYYY" DATE1 First epoch blue-plate exposure date
44- 45 A2 --- GR1 [EW NS] Grating image orientation on first
epoch blue plates (East-West or North-South)
50- 59 A10 "DD/MM/YYYY" DATE2 Second epoch blue-plate exposure date
62- 63 A2 --- GR2 [EW NS] Grating image orientation on second
epoch blue plates (East-West or North-South)
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Note (1): In this file the basic data are provided for each of the
selected 156 SPM fields. However, the Catalog's object numbers may
contain some adjacent SPM field numbers which are not presented in
this file. This is because in the field overlap area the object ID is
assigned based on the field with the nearest plate center. This
procedure will ensure consistency in the numbering system with
adjacent fields incorporated in future versions of the Catalog.
SPM fields for which the exposure date of visual plates is different
from the blue plate. The field centers at the equinox B1950 can be
found in Platais et al. (1998A&A...331.1119P).
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Field Date 1 Date 2
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385 30/07/1987 NS
459 22/09/1998 EW
600 21/09/1968 EW
420 7/02/1997 EW
449 21/09/1968 EW
515 8/08/1969 EW
516 5/09/1996 NS
525 30/07/1968 EW
526 20/09/1968 EW
569 21/02/1993 NS
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History:
Copied at http://www.astro.yale.edu/astrom
References:
Girard et al., 1998AJ....115..855G
"The Southern Proper Motion Program. I. Magnitude equation correction"
Platais et al., 1998A&A...331.1119P
"The Hipparcos proper motion link to the extragalactic reference system using
NPM and SPM"
Platais et al., 1998AJ....116.2556P
"The Southern Proper Motion Program. II. A Catalog at the South Galactic Pole"
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(End) Patricia Bauer [CDS] 15-Jan-2002