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II/97 ANS UV Catalogue of Point Sources (Wesselius+ 1982)
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ANS UV Photometry Catalogue of Point Sources
Wesselius P.R., van Duinen R.J., de Jonge A.R.W., Aalders J.W.G.,
Luinge W., Wildeman K.J.
<Astron. Astrophys. Suppl. Ser. 49, 427 (1982)>
=1982A&AS...49..427W
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ADC_Keywords: Photometry, ultraviolet
Mission_Name: ANS
Description:
This catalog is a result of the observations made with the
Astronomical Netherlands Satellite (ANS) which operated between
October 1974 and April 1976. The ANS satellite observed in five UV
channels centered around 150, 180, 220, 250 and 330nm. The photometric
bands are:
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Band designation 15N 15W 18 22 25 33
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Central wavelength (nm) 154.5 154.9 179.9 220.0 249.3 329.4
Bandwidth (nm) 5.0 14.9 14.9 20.0 15.0 10.1
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The reported magnitudes were obtained from mean count rates converted
to fluxes using the ANS absolute calibration of Wesselius et al.
(1980A&A....85..221W). In addition to the ultraviolet magnitudes, the
catalog contains positions taken from the satellite pointing, spectral
types, and UBV data from other sources as well as comments on
duplicity, variability, and miscellaneous notes concerning individual
objects.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
ans.dat 131 3573 The Catalog of ANS Point Sources
ans.doc 80 672 Original Documentation produced at ADC
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See also:
II/59B : Catalogue of stellar UV fluxes (TD1) (Thompson+ 1978)
Byte-by-byte Description of file: ans.dat
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Bytes Format Units Label Explanations
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1- 9 A9 --- Name Object identification (HD/DM/NGC/IC) (1)
11- 12 I2 h RAh Right Ascension B1950 (hours) (2)
13- 14 I2 min RAm Right Ascension B1950 (minutes) (2)
15- 16 I2 s RAs Right Ascension B1950 (seconds) (2)
17 A1 --- DE- Declination B1950 (sign) (2)
18- 19 I2 deg DEd Declination B1950 (degrees) (2)
20- 23 F4.1 arcmin DEm Declination B1950 (minutes) (2)
24- 33 A10 --- SpType Spectral type (3)
34- 38 F5.2 mag Vmag ? V (visual or photoelectric) magnitude (4)
40- 44 F5.2 mag B-V ? B-V color (4)
46- 50 F5.2 mag U-B ? U-B color (4)
51 A1 --- l_15N [>] indicates an upper limit (S/N < 3)
52- 57 F6.3 mag 15N ? magnitude around 155+/-5nm (5)
58 A1 --- --- [(]
59- 61 I3 mmag e_15N ? Error estimate on 15N
62 A1 --- --- [)]
63 A1 --- l_15W [>] indicates an upper limit (S/N < 3)
64- 69 F6.3 mag 15W ? magnitude around 155+/-15nm (5)
70 A1 --- --- [(]
71- 73 I3 mmag e_15W ? Error estimate on 15W
74 A1 --- --- [)]
75 A1 --- l_18 [>] indicates an upper limit (S/N < 3)
76- 81 F6.3 mag 18 ? magnitude around 180+/-15nm (5)
82 A1 --- --- [(]
83- 85 I3 mmag e_18 ? Error estimate on 18
86 A1 --- --- [)]
87 A1 --- l_22 [>] indicates an upper limit (S/N < 3)
88- 93 F6.3 mag 22 ? magnitude around 220+/-20nm (5)
94 A1 --- --- [(]
95- 97 I3 mmag e_22 ? Error estimate on 22
98 A1 --- --- [)]
99 A1 --- l_25 [>] indicates an upper limit (S/N < 3)
100-105 F6.3 mag 25 ? magnitude around 250+/-15nm (5)
106 A1 --- --- [(]
107-109 I3 mmag e_25 ? Error estimate on 25
110 A1 --- --- [)]
111 A1 --- l_33 [>] indicates an upper limit (S/N < 3)
112-117 F6.3 mag 33 ? magnitude around 330+/-10nm (5)
118 A1 --- --- [(]
119-121 I3 mmag e_33 ? Error estimate on 33
122 A1 --- --- [)]
123-125 I3 --- o_25 Number of observations (6)
127 A1 --- Dflag [D] Duplicity flag (7)
128 A1 --- Vflag [V] Variability flag (8)
130-131 A2 --- Rem Other notes and remarks (9)
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Note (1): the designation is assigned per the following prioritized order:
for stars: Henry Draper (HD) number, Durchmusterung (DM) identification,
other
for nebular objects: NGC number, IC number, other
Note (2): position as transmitted to the satellite for the observation
Note (3): MK types are taken from the following sources (priority order):
1. Jaschek's selected Spectral types (1978, Cat. <III/42>);
2. Houk and Cowley (1975, Cat. <III/31>; 1978, Cat. <III/51>);
3. Buscombe's catalogues (1977, 3rd edition; 1980, 4th edition;
Evanston, Illinois, USA)
4. or from the HD Catalogue (Cat. <III/135>).
The format of the MK type is reasonably uniform in that temperature
classes are in byte 24, subclasses in bytes 25-27, and luminosity
classes/peculiarities in bytes 28-33; however, there are exceptions
with Mount Wilson types and Wolf-Rayet stars where the luminosity
classes and W character always begin in byte 24 also, resulting in a
right shift of temperature classes and subclasses. Non-temperature
classes, such as "P" (for peculiar) are also present, or the field can
be entirely blank.
Note (4): the magnitudes are taken from:
1. Nicolet's homogenized UBV (1978A&AS...34....1N)
2. the "Catalog of Stellar Identifications" (CSI, see Ochsenbein et
al., 1981A&AS...43..259O) where m_v_ is estimated from m_pg_
and HD spectral type
3. or from other sources.
Note that visual magnitude values are reported to lower precision
(one decimal) then photoelectric V magnitudes.
Note (5): Magnitudes are defined as:
m = -2.5log F - 26.10
where F is the flux in W/m**2/nm.
Mean count rates are converted to fluxes using the ANS absolute
calibration given by Wesselius et al. (1980A&A....85..221W) and the
fluxes used to derive the magnitudes reported.
Note that data of varying precision are given, so bytes 63 and/or 64
may be blank.
Note (6): number of separate pointings in the 25 band.
Usually this number applies to all observation bands; however, at 15N
and 15W the number can be smaller because the band was used in either
the wide (15nm) or the narrow (5nm) mode. Also, the 33 band, and to a
lesser degree, the 15 bands were more frequently affected by particle
hits than the other three channels, thus resulting in the deletion of
data in one or both when the other bands had data of good enough
quality to be processed.
Note (7): Duplicity:
D indicates that at least two stars are present within 1arcmin of the
pointing position according to the CSI.
Note (8): Variability:
V indicates variability in the UV results as determined by tests
described in Section 7.2.2 of source reference.
Note (9): the codes have the following meaning:
? : comment(s) in bytes 127 and/or 128 uncertain
N : possible contribution from nebular emission
SL: spectral type probably later than listed
SE: spectral type probably earlier than listed
V?: suspected variable; for some of these objects the groundbased
information may be erroneously listed in the source catalogs
E?: possible anomalous extinction (reddening) law
C : cluster star in crowded field, with possible UV data contamination
SD: possibly subluminous
D : stars listed as double in source other than CSI
D?: hot UV-bright companion probably present; may be a blue field star
(field of view is 2.5x2.5arcminutes)
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Acknowledgements:
The present documentation is mostly taken from the "Documentation for
the machine-readable version of the ANS ultraviolet photometry catalogue
of point sources" bu Wayne H. Warren Jr. (August 1984; "ans.doc" file)
History:
A preliminary version of the catalogue was supplied by Dr. P. R.
Wesselius to CDS in June 1980 (catalogue numbered II/60); another
version was sent to ADC in March 1984, to which modifications and
corrections detailed in section 4 of the "ans.doc" file were performed
by Wayne H. Warren Jr., generating the catalogue numbered II/97.
Two additional corrections were made in July 2001 at CDS:
- Name of record#196, originally OXF+6725, is Oxf+25 6725 = EGGR 15
- U-B value of record #2392 = HD 156233, originally -00.5, set to -0.54
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(End) Francois Ochsenbein [CDS] 01-Aug-2001