III/182 HDE Charts: positions, proper motions (Nesterov+ 1995)
The Henry Draper Extension Charts: A catalogue of accurate positions,
proper motions, magnitudes and spectral types of 86933 stars.
Nesterov V.V., Kuzmin A.V., Ashimbaeva N.T., Volchkov A.A.,
Roeser S., Bastian U.
<Astron. Astrophys. Suppl. Ser. 110, 367 (1995)>
=1995A&AS..110..367N 1995A&AS..110..367N
ADC_Keywords: Positional data ; Proper motions ; Spectral types
Keywords: catalogues - astrometry - stars: fundamental parameters -
stars: variable
Description:
This document is intended to serve as a short description of the data
files of the catalogue of 88883 stars of the Henry Draper Extension
Charts. Detailed explanation of the Extension, catalogue production
and so on may be found in the printed paper referenced above.
There are two files comprising the catalogue, namely data file
(CATALOG) and individual remarks file (REMARKS). The format of the
second one is free - it starts with 6-digits HDE number followed by
remark text.
The CATALOG file contains 88883 logical records of the length 61 bytes
each. A detailed description of the record format is given below.
Abstract of Paper:
The Henry Draper Extension Charts (Cannon et al., 1949), published in
the form of finding charts, provide spectral classification for some
87000 stars mostly between 10th and 11th magnitude. This data, being
highly valuable, as yet was practically unusable for modern
computer-based astronomy. An earlier pilot project (Roeser et al.
1991) demonstrated a possibility to convert this into a star
catalogue, using measurements of cartesian coordinates of stars on the
charts and positions of the Astrographic Catalogue (AC) for subsequent
identification. We present here a final HDEC catalogue comprising
accurate positions, proper motions, magnitudes and spectral classes
for 86933 stars of the Henry Draper Extension Charts.
References:
Cannon A.J., Mayall M.W., 1949, Ann. Harv. Coll. Obs. 112
Roeser S., Bastian U., Wiese K., 1991, A&AS 88, 277
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
catalog.dat 67 88883 The catalogue
remarks.dat 70 1148 Remarks
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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- 6 I6 --- HD [272151/359083]+= HD number
7 A1 --- m_HD Component identification: A, B...
9 A1 --- n_HD [R] 'R' if individual remark for this star
is given in the 'remarks' file
11- 12 A2 --- Sp Spectral class
14- 17 F4.1 mag mag Magnitude - photographic or J/V (2)
19 A1 --- P [PCAGMV] Position source flag (1)
21- 22 I2 h RAh Right Ascension J2000.0 (hours)
24- 25 I2 min RAm Right Ascension J2000.0 (minutes)
27- 31 F5.2 s RAs [0/60] Right Ascension J2000.0 (seconds)
33 A1 --- DE- Declination J2000.0 (sign)
34- 35 I2 deg DEd Declination J2000.0 (degrees)
37- 38 I2 arcmin DEm Declination J2000.0 (minutes)
40- 43 F4.1 arcsec DEs [0/60] Declination J2000.0 (seconds)
45 A1 --- pmf [TF] If T (TRUE), proper motions are present;
if F (FALSE) only the Epoch is present
46- 52 F7.3 arcsec/yr pmRA ?Annual proper motion in RA (if pmFlag=T)
53- 59 F7.3 arcsec/yr pmDE ?Annual proper motion in DE (if pmFlag=T)
60- 67 F8.3 yr Epoch [1891/1989]? Observation epoch
in julian years (if pmf=F)
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Note (1): Position source is defined as follows:
P = PPM (Roeser et al., 1993, "PPM Star Catalogue", Vol. I-IV,
Spektrum Akademischer Verlag, Heidelberg
C = GSC-AC (Guide Star and Astrographic Catalogues)
A = AC (Astrographic Catalogue)
G = GSC (Guide Star Catalogue)
M = Miscellaneous
V = Variables only found in GCVS or CSVS (General Catalogue of Variable
stars or Catalogue of Suspected Variable Stars)
Note (2): magnitudes are either the AC B-magnitudes (when PosSource is
'P', 'A' or 'C') or the GSC V/J magnitudes (when PosSource is 'G')
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Courtesy: Siegfried Roeser
(End) Francois Ochsenbein [CDS] 18-May-1995