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II/152 UBV Photometry of 1690 High-Proper-Motion Subdwarfs (Sandage+ 1986)
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New Subdwarfs. IV. UBV Photometry of 1690 High-Proper-Motion Stars
Sandage A., Kowal C.T.
<AJ, 91, 1140, (1986)>
=1986AJ.....91.1140S
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ADC_Keywords: Photometry, UBV; Stars, subdwarf
Abstract:
Three-color UBV photometry is given for 1690 high-proper motion
stars, providing a finding list for potential high-velocity stars
of various metallicity values. The purpose of the survey is to
obtain candidates for trigonometric programs on subdwarfs and to
enlarge the sample with which to study the relation between stellar
kinematics and metal abundance. The observations were made with
the 60- and 100-inch Mount Wilson reflectors and the Carnegie
20-inch reflector at Palomar.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
catalog.dat 82 1690 The catalog
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Byte-by-byte Description of file: catalog.dat
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Bytes Format Units Label Explanations
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1- 8 A8 --- ID Giclas (G), L, misc. identifier
9 A1 --- Comp1 Component designation (A, B)
11- 12 A2 --- DM_ID Prefix for DM identifier (BD, SD)
13- 20 A8 --- DM_No Durchmusterung number
21 A1 --- DM_suff Supplemental DM letter
22 A1 --- Comp2 Component letter designation
23- 28 A6 --- HD Henry Draper (or Extension) number
30- 31 I2 h RAh R.A. B1950 (hours)
33- 34 I2 min RAm RA B1950 (minutes)
36- 37 I2 s RAs RA B1950 (seconds of time)
39 A1 --- DE- Dec. at B1950 (sign)
40- 41 I2 deg DEd Dec. at B1950 (degrees)
43- 46 F4.1 arcmin DEm Dec. at B1950 (minutes)
48- 51 F4.2 arcsec pm ?Total proper motion (annual)
53- 55 I3 deg angle ?Position angle of proper motion
57- 61 F5.2 mag V Observed V magnitude
63- 67 F5.2 mag B-V Observed B-V color
69- 73 F5.2 mag U-B ?Observed U-B color
75- 77 A3 mag d(U-B) *(U-B)Hyades - (U-B) at (B-V)
79 I1 --- n_obs *Number of observations
80- 82 I3 --- Tel *Telescope identifier (20, 60, or 100)
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Note on d(U-B):
WD indicates a white dwarf.
Note on n_obs:
The number of observations and telescope size are missing for G19-11.
Note on Tel:
There is an error in the telescope size for G73-71. It is given as J0 and not explained.
As the error also occurs in the printed volume, it is impossible to correct.
Modifications to Original Catalog:
The original file appeared exactly as in the published paper. To allow
easier cross identifications to be made to major catalogs, the HD and DM
identifiers were determined and inserted into the catalog. To begin,
the G numbers were rewritten in the current uniform format. For the
G-numbered stars only, the Lowell proper-motion catalogs were searched
by machine and the cross identifications were written to a separate file,
which was then edited to isolate the DM numbers. DM numbers that were
not in the cross identifier field because of overflow were found in
the remarks to the Lowell catalog and inserted manually. For the
southern stars listed in Lowell Bulletin No. 164, where many DM numbers
are not given, no attempt was made to cross identify automatically.
All equatorial coordinates were then precessed to B1855, B1875, and
B1900 so that source catalogs could be consulted. All stars still
lacking DM numbers and bright enough to suggest DM membership were
checked against the BD and SD catalogs and identified there by their
precessed coordinates. The DM numbers were then used to search the
Henry Draper Catalogue to identify HD and HDE (volume 100) stars.
Cross checks were made manually for any stars lacking HD numbers, but
bright enough to possibly be in the HD.
Using the precessed coordinates, candidates for membership in the
second Henry Draper Extension (volume 112) were then selected based
on their positions and the sky coverage of the HDE 112 charts. Using
appropriate coordinates, the area of each candidate was then found on
the correct chart. Final identifications were made using the finding
charts for the G-numbered stars published in Lowell Bulletins 102 and
112. This check was to ensure that a star located on an HDE chart by
its position was indeed the correct G star. As a final check, G stars
cross identified independently by Mermilliod in his catalogs of UBV
photometry were checked and all discordances were examined and
resolved.
The uniform edition of this catalog containing cross identifications
to the HD and DM catalogs has been prepared by Wayne H. Warren Jr.,
Hughes STX Corporation, Laboratory for Astronomy and Solar Physics,
NASA Goddard Space Flight Center, Greenbelt, Maryland 20771, USA.
The undersigned modified the description somewhat to conform to the current
standard form and made several corrections to the format table. She also
corrected some errors in the catalog file. She thanks Dr. Warren for the
substantial effort he has put into improving this catalog.
References:
Cannon, A.J., and Pickering, E.C. 1918-24, The Henry Draper Catalogue,
Ann. Astron. Obs. Harvard Coll., 91-99
Cannon, A.J. 1924-36, The Henry Draper Extension, Ann. Astron. Obs.
Harvard Coll., 100
Cannon, A.J., and Walton Mayall, M. 1949, The Henry Draper Extension,
Annie J. Cannon Memorial Volume, Ann. Astron. Obs. Harvard Coll., 112
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, Lowell Obs. Bull.
No. 164
Giclas, H.L., Burnham Jr., R., and Thomas, N.G. 1979, Lowell Proper
Motions, Reprint of Finding Charts for First 100 Plate Regions,
Lowell Obs. Suppl. to Bull. 102 and 112
Sandage, A., and Kowal, C. 1986, AJ, 91, 1140
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(End) Nancy G. Roman [ADC/SSDOO] Sept-21-1995