II/78 uvby-Beta Phot 398 Members of Visual Multiple Systems (Olsen 1982)
uvby-Beta Photometry of 398 Members of Visual Multiple Stellar Systems
Olsen E.H.
<Astron. & Astrophys. Suppl., 48, 165 (1982)>
=1982A&AS...48..165O 1982A&AS...48..165O
ADC_Keywords: Photometry, uvby, beta ; Stars, double and multiple
Description:
The catalogue contains mainly two types of visual double stars:
Evolved stars with main sequence companions; and systems, for which
the IDS gives photometric and spectroscopic data, that suggest the
secondary to be above the main sequence if the primary is placed on
the main sequence. The photometry has been done with the Danish 50 cm
reflector on La Silla, ESO, the limiting magnitude is 12m, separations
are larger than 7". Identifications given are IDS, HD, and DM numbers.
For each object V, b-y, ml, cl, and beta are given together with the
number of nights, weights and r.m.s. errors of one observation (weight
1). The catalogue is published as table IV by E.H. Olsen, Astron.
Astrophys. Suppl. 48, 165, where further details and discussion may be
found.
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
data.dat 113 398 uvby-beta photometry on standard visual
double or multiple systems (table 4)
--------------------------------------------------------------------------------
Byte-by-byte Description of file: data.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1-12 A12 --- IDS *IDS number
14-19 I6 --- HD ? HD number
20-23 A4 --- rem *Remark
24-32 A9 --- DM *Durchmusterung designation
33 A1 --- m_DM [ A] Durchmusterung number suffix
34-39 F6.3 mag Vmag ? V magnitude
41-45 F5.3 mag e_Vmag ? RMS error on V
48-53 F6.3 mag b-y ? b-y color index
55-59 F5.3 mag e_b-y ? RMS error on b-y
62-67 F6.3 mag m1 ? m1
69-73 F5.3 mag e_m1 ? RMS error on m1
76-81 F6.3 mag c1 ? c1
83-87 F5.3 mag e_c1 ? RMS error on c1
89-91 F3.1 --- W1 *? Sum of Weights for uvby photometry
94 I1 --- N1 ? Number of nights observed for uvby
96-100 F5.3 mag beta ? Beta index
102-106 F5.3 mag e_beta ? RMS error on beta
108-110 F3.1 --- W2 *? Sum of Weights for beta photometry
113 I1 --- N2 ? Number of nights observed for beta
--------------------------------------------------------------------------------
Note on IDS:
The letters indicating individual components follow rigidly the IDS
(Jeffers+ 1963) even in cases like IDS 17278S5534, where the A
component is fainter than B.
Note on rem:
CPD = CPD number in DM
/ = Separates two numbers when star is composite
Note on DM:
Durchmusterung numbers follow the convention of the HD catalogue:
BD 1855 position North of declination -23°
CD South of above, and 1875 position North of -52°
CPD South of -52°
Note on W1, W2:
Each observation was given weight 1 except in a number of cases where
the difference in counting time was deemed to be so big that a
weighting proportional to the counting time was thought more
realistic.
--------------------------------------------------------------------------------
Acknowledgement:
The brief description above was written by Erik H. Olsen of the
Copenhagen University Observatory.
References:
Cannon A.J. and Pickering E.C. (1918-1924) The Henry Draper Catalogue,
Ann. Astron. Obs. Harvard College (HD).
(Cat. III/135)
Jeffers H.M., Bos W.H.v.d. and Greeby F.M. (1963) Index Catalogue of Visual
Double Stars, 1961.0, Publ. Lick Obs., 21 (IDS).
(see WDS Cat. I/237)
Olsen E.H., Astron. & Astrophys. Suppl. 48, 165
(End) Julie Anne Watko [SSDOO/ADC] 10-Apr-1996