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I/110 Occultation Double-Star Observations (Evans 1983)
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Catalogue of Occultation Double-Star Observations
Evans D.S.
<IAU Colloquium No. 62, Current Techniques in Double and Multiple Star
Research, Lowell Obs. Bull. 167, p. 73 (1983)>
=1983LowOB.167...73E
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ADC_Keywords: Stars, double and multiple ; Occultations
Description:
This catalog contains data on 224 double stars observed photoelectrically
during lunar occultations. The author cites the advantages of this method of
double star detection as increased resolution, accuracy of the vector
separations of roughly one-half arcsecond or better, and the opportunity to
make photometric determinations of the magnitude differences between
components. The vector separation is the true separation projected along a
line perpendicular to the actual lunar limb. The catalog is a compilation of
twelve years of observations from the literature (through roughly 1980).
It is divided into three files. The first file, data1.dat, contains
information on stars brighter than visual magnitude 6.7. The second,
data2.dat, lists SAO catalog stars fainter than magnitude 6.7. The third
file, data3.dat, contains data on faint stars with no SAO number. For these
stars, data on their magnitudes or spectral types may be absent. In many
cases there are multiple records per star, reflecting separate
observations. The records are arranged by SAO number or other identifier,
and contain visual magnitudes, spectral type, observing run number, a
subjective grade of the probability of being double, the vector separation
with computed error, position angle, and the lunar limb slope and its error.
It also includes the magnitude difference between the components in (somewhat
arbitrarily assigned) blue and red band passes. In the case of a triple
star, the run number is repeated and the data for the triple given with
magnitude differences from the brightest star.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
data1.dat 100 178 m(v) <= 6.7
data2.dat 100 211 SAO m(v) > 6.7
data3.dat 100 14 Faint Non-SAO
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Byte-by-byte Description of file: data1.dat
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Bytes Format Units Label Explanations
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1- 6 I6 --- SAO ?SAO Number
10- 17 A8 --- NAME ?Other Name for Star
19- 23 F5.2 mag MAG ?Magnitude
24- 33 A10 --- Sp ?Spectral Type
35- 42 A8 --- RUN *?Run Number of the Observation
44- 45 I2 --- DAY ?Observation Date Day
46- 47 I2 --- MONTH ?Observation Date Month
48- 49 I2 --- YEAR ?Observation Date Year
51 I1 --- G *?Grade
52 A1 --- n_G *?Remark on G
54- 60 F7.1 marcsec SEP ?Vector Separation
62- 65 F4.1 marcsec e_SEP ?Computed Error of Vector Separation
66 A1 --- n_SEP ?Remark on SEP (see note on n_G)
68- 70 I3 deg PA *?Position Angle
71 A1 --- n_PA ?Remark on PA (see note on n_G)
73- 75 I3 --- SL ?Limb Slope
76 A1 --- n_SL ?Remark on SL (see note on n_G)
77- 78 I2 --- e_SL ?Error of SL
80- 83 F4.2 mag dB ?Blue Differential Magnitude
85- 88 F4.2 mag e_dB ?Error of dB
89 A1 --- n_dB *?Remark on dB
90- 94 F5.2 mag dR *?Red Differential Magnitude
96- 99 F4.2 mag e_dR ?Error of dR
100 A1 --- n_dR ?Remark on dR (see note on n_dB)
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Note on RUN:
Sources
McDonald Observations: M100-1871: Astron. J. 76, 1109, 1971:
M1875-M1893, M2102-M22221, M2304-2711: Astron. J. 78, 482, 1973:
M1902-M2020, M2250-2262: Astron. J. 80, 449, 1975:
M2713-M3712: Astron. J. 80, 689, 1975:
M3713-M4009: Astron. J. 81, 650, 1976:
M4010-M4245, Astron. J. 82, 631, 1977
(but M4045, M4058, M4059, M4148, Astron. J. 82, 640, 1977):
M36/7, M36/8, M4247-M4729: Astron. J. 83, 1100, 1978:
M4730-M5222, Astron. J. 85, 478, 1980
(but M5100-M5112: Astron. J. 85, 490, 1980), and
M5223-M5646, Astron. J., submitted.
Geneva Observations: G12-G38: Astron. J. 80, 445, 1975.
Tonantzintla Observations: T001-023: Astron. J. 79, 1299, 1974.
Iowa Observations: EB002, EB021: Astron. J. 76, 1131, 1971:
EB001-EB121, Astrophys. J. Supp. Ser. 28, 405, 1974:
EB122-EB320, : Astrophys. J. Supp. Ser., 34, 493, 1977:
EB321-562: Astrophys. J. Supp. Ser., 40, 475, 1979:
EB585-592: Astrophys. J. Lett. 228, Llll, 1979.
Hamburg Observations: All H numbers, Astron. Astrophys., 48, 245, 1976.
Victoria Observations: Vl-V2: Publ. Dom. Astrophys. Obs. 14, 271, 1974:
Vl-V32, J. Roy. Astron. Soc. Canada, 72, 305, 1978.
Illinois Observations:-I7701-I7865: Astron. J. 85, 1053, 1980.
Flagstaff Observations: F, Astron. J. 84, 872, 1979
and private communications.
Peterson et al.: P: Astron. J. 86, 280, 1981.
Special Stars:
Beta Scorpii: Astron. J. 82, 414, 1977. Astron. J. 82, 495, 1977,
Astron. J. 83, 438, 1978: Astron. J. 84, 257, 1979.
Sigma Scorpii: Publ. Astron. Soc. Pac. 86, 116, 1974.
Beta Capricorni: Astrophys. J. 228, 497, 1979.
Note on G:
0 No Duplicity
1 Possible Duplicity
2 Probable Duplicity
3 Certain Duplicity
Grades are based on statements by observers.
Note on n_G:
Asterisks (*) denote places where corrections have been applied
to published figures, whether errors of star numbers or run
numbers in original records or notes. Most commonly corrections
have been made as far as can be deduced from the original sources,
to bring the column of position angle values to those appropriate
to position angles from the brighter to the fainter component.
Most changes have been made by 180 degrees.
Note on PA:
Position Angle on the lunar limb as modified by the slope deduced
in favorable cases from the spacing of the diffraction bands on
the occultation trace.
Note on n_dB:
An asterisk indicates that the magnitude difference between
components had to be computed from values expressed in different
style in the original papers.
Note on dR:
A negative sign indicates that the "secondary" is fainter in the
blue channel and brighter in the red.
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Byte-by-byte Description of file: data2.dat
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Bytes Format Units Label Explanations
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1- 6 I6 --- SAO ?SAO Number
7- 8 A2 --- SAOsuf SAO Suffix
10- 17 A8 --- NAME Other Name for Star
19- 23 F5.2 mag MAG ?Magnitude
24- 33 A10 --- Sp Spectral Type
35- 42 A8 --- RUN *Run Number of the Observation
44- 45 I2 --- DAY ?Observation Date Day
46- 47 I2 --- MONTH ?Observation Date Month
48- 49 I2 --- YEAR ?Observation Date Year
51 I1 --- G *?Grade
52 A1 --- n_G *Remark on G
54- 60 F7.1 marcsec SEP ?Vector Separation
62- 65 F4.1 marcsec e_SEP ?Computed Error of Vector Separation
66 A1 --- n_SEP Remark on SEP (see note on n_G)
68- 70 I3 deg PA *?Position Angle
71 A1 --- n_PA Remark on PA (see note on n_G)
73- 75 I3 --- SL ?Limb Slope
76 A1 --- n_SL Remark on SL (see note on n_G)
77- 78 I2 --- e_SL ?Error of SL
80- 83 F4.2 mag dB ?Blue Differential Magnitude
85- 88 F4.2 mag e_dB ?Error of dB
89 A1 --- n_dB *Remark on dB
90- 94 F5.2 mag dR *?Red Differential Magnitude
96- 99 F4.2 mag e_dR ?Error of dR
100 A1 --- n_dR Remark on dR (see note on n_dB)
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Note on RUN:
Note on G:
Note on n_G:
Note on PA:
Note on n_dB:
Note on dR:
For all notes, see notes for data1.dat
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Byte-by-byte Description of file: data3.dat
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Bytes Format Units Label Explanations
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1- 8 F8.4 --- DM ?DM Number
10- 17 A8 --- NAME Other Name for Star
19- 23 F5.2 mag MAG ?Magnitude
24- 33 A10 --- Sp Spectral Type
35- 42 A8 --- RUN *Run Number of the Observation
44- 45 I2 --- DAY ?Observation Date Day
46- 47 I2 --- MONTH ?Observation Date Month
48- 49 I2 --- YEAR ?Observation Date Year
51 I1 --- G *?Grade
52 A1 --- n_G *Remark on G
54- 60 F7.1 marcsec SEP ?Vector Separation
62- 65 F4.1 marcsec e_SEP ?Computed Error of Vector Separation
66 A1 --- n_SEP Remark on SEP (see note on n_G)
68- 70 I3 deg PA *?Position Angle
71 A1 --- n_PA Remark on PA (see note on n_G)
73- 75 I3 --- SL ?Limb Slope
76 A1 --- n_SL Remark on SL (see note on n_G)
77- 78 I2 --- e_SL ?Error of SL
80- 83 F4.2 mag dB ?Blue Differential Magnitude
85- 88 F4.2 mag e_dB ?Error of dB
89 A1 --- n_dB *Remark on dB
90- 94 F5.2 mag dR *?Red Differential Magnitude
96- 99 F4.2 mag e_dR ?Error of dR
100 A1 --- n_dR Remark on dR (see note on n_dB)
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Note on RUN:
Note on G:
Note on n_G:
Note on PA:
Note on n_dB:
Note on dR:
For all notes, see notes for data1.dat
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(End) Julie Anne Watko [SSDOO/ADC] 03-NOV-1995