VII/218 Southern Stars embedded in nebulosity (van den Bergh+, 1975)
Catalogue of southern stars embedded in nebulosity.
Van den Bergh S., Herbst W.
<Astron. J. 80, 208 (1975)>
=1975AJ.....80..208V 1975AJ.....80..208V
ADC_Keywords: Nebulae ; Milky Way
Description:
A survey of the Milky Way southward of the Palomar Sky Survey for the
identification of reflection nebulae was carried out at the Cerro
Tololo Inter-American Observatory in Chile. Plates in blue light were
obtained at the Curtis Schmidt telescope covering a strip of plus or
minus six degrees of the galactic equator. Red sensitive plates for
comparison were also obtained with the same telescope covering the
same area near the galactic plane. Observatory staff members and some
students of the University of Toronto, Canada assisted in identifying
stars embedded in nebulosity as shown by the plates. Although this
catalogue roughly complements the Catalogue of Reflection Nebulae of
van den Berg (1966AJ.....71..990V 1966AJ.....71..990V, Cat. VII/21), the region here
surveyed is more narrowly confined to the galactic equator.
File Summary:
-------------------------------------------------------------------------------
FileName Lrecl Records Explanations
-------------------------------------------------------------------------------
ReadMe 80 . This file
catalog.dat 71 136 The Catalogue (Table I of publication)
notes.dat 80 47 Full notes of publication for Table I
-------------------------------------------------------------------------------
See also:
VII/21 : Catalogue of Reflection Nebulae (Van den Bergh, 1966)
Nomenclature Notes:
Objects of this catalogue are frequently designated in the literature
with the acronym VDBH.
Byte-by-byte Description of file: catalog.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 2 I2 --- BHe [1,93] BHe id number
3- 7 A5 --- m_BHe BHe components as (a,b,c)
12- 19 A8 --- IDs Alternate designation
22- 23 I2 h RAh Right Ascension B1950 (hours)
25- 28 F4.1 min RAm Right Ascension B1950 (minutes)
31 A1 --- DE- Declination B1950 (sign)
32- 33 I2 deg DEd Declination B1950 (degrees)
35- 36 I2 arcmin DEm Declination B1950 (minutes)
39- 42 A4 --- Type Type of nebula, see Note (1)
43 A1 --- u_Type Uncertainty flag (:) on Type
45- 47 A3 --- Br Brightness from blue plates, see Note (2)
48 A1 --- u_Br Uncertainty flag (:) on Br
50- 51 A2 --- Color Coded reference to colors, see Note (3)
52 A1 --- u_Color Uncertainty flag (:) on Color
54- 56 A3 --- Abs Absorption in field of nebula, see Note (4)
57 A1 --- u_Abs Uncertainty flag (:) on Absorb
60- 62 F3.1 arcmin BDiam ? Maximum diameter observed on blue plates
63 A1 --- u_BDiam Uncertainty flag (:) on BDiaMax
66- 68 F3.1 arcmin RDiam ? Maximum diameter observed on red plates
69 A1 --- u_RDiam Uncertainty flag (:) on RDiaMax
71 A1 --- Rem [*] Note flag (*) detailed in file "notes.dat"
--------------------------------------------------------------------------------
Note (1): Types given are I, II, I-II, or pec. These are defined as follows:
I: Nebulae in which the illuminating star is embedded in the nebulosity.
II: The illuminating star is situated outside the nebula.
I-II: This combination type was undefined in the original publication.
pec: Peculiar.
Note (2): Surface brightness is coded as follows:
'vBr'=very bright; 'Br'=bright; 'M'=moderate; 'F'=faint; 'vF'=very faint.
Note (3): Color types are coded:
'vB'=very blue; 'B'=blue; 'mB'=moderately blue; 'I'=intermediate;
'mR'=moderately red; 'R'=red; 'vR'=very red.
Note (4): Absorption is coded:
'Str'=strong; 'Mod'=moderate; 'Wk'=weak.
--------------------------------------------------------------------------------
Byte-by-byte Description of file: notes.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 2 I2 --- BHe BHe id number
3- 7 A5 --- m_BHe BHe components as (a,b,c)
10-79 A70 --- Text Text of note
80 A1 --- Flag '*' if note continues on next line
--------------------------------------------------------------------------------
Note to the electronic version: (by Raymond Bruton,
and Patrick Chevalley, ):
The intended purpose of the electronic version of the BHe catalogue is
for use with the computer plotting of star charts. Astronomical
software, (Cartes du Ciel-Sky Charts) developed by the second editor
(Patrick Chevalley) was used to test dataset validity (see
http://www.astrosurf.org/astropc). Any errors in the dataset should be
reported to the editors. Any gross error in the original should
likewise be reported. As a check on errors the work of Herbst
(1975AJ.....80..212H 1975AJ.....80..212H) was consulted. When used with the northern
dataset of van den Berg (1966AJ.....71..990V 1966AJ.....71..990V, see Cat. VII/21) the
work of Racine (1968AJ.....73..233R 1968AJ.....73..233R) was likewise consulted as a check
for possible errors and misidentifications.
The indiscriminate comparison of the present work with the work of
van den Berg (1966AJ.....71..990V 1966AJ.....71..990V) is not recommended. When using the
northern and southern datasets for reflection nebulae together for
plots of surface distribution the differences are clearly evident.
This was also indicated in the original publication of van den Berg
and Herbst (1975AJ.....80..212H 1975AJ.....80..212H). For plots of the southern nebulae
further from the galactic plane than the present work a remedy was
sought and in part found. The catalogue of southern dark clouds of
Hartley et al. (1986A&AS...63...27H 1986A&AS...63...27HC, see Cat. VII/191) was used
because of prolific notes about association with bright nebulae.
Although this combination was useful the editors also used the
catalogue of Herbig and Bell (1988, see Cat. V/73A for cross checks
on position errors. The editors were motivated to produce the present
dataset in part due to the popularization of some BHe objects by
Slotegraaf (1998). Mr. Slotegraaf also encouraged the production of
the present dataset in private correspondence. This work would not
have been possible without the use of the NASA Astrophysics Data
System maintained at Harvard College, USA., for the obtaining of the
original paper of van den Berg and Herbst (1975AJ.....80..212H 1975AJ.....80..212H), and
closely related papers. The American Astronomical Society, and the
University Press, Chicago, USA, are thanked for making copyrighted
papers from the Astronomical Journal available to the NASA
Astrophysics Data System and indirectly to the editors.
References:
Hartley M., Manchester R.N., Tritton S.B., Gross W.M. 1986,
Astron. Astrophy. Supp. Ser. 63, 27 (1986A&AS...63...27H 1986A&AS...63...27H), Cat. VII/191
Herbig, G.H., Bell, K.R., 1988, Lick Observatory Bulletin No. 1111
(Cat. V/73>)
Herbst, W. 1975, Astron. J. 80, 212 (1975AJ.....80..212H 1975AJ.....80..212H)
Slotegraaf, A. 1998 "Deepsky Observers Companion"
(http://members.xoom.com/auke/index.html)
van den Berg S., 1966, Astron. J. 71, 990 (1966AJ.....71..990V 1966AJ.....71..990V)
(Cat. VII/21)
van den Berg S., Herbst W., 1975, Astron. J. 80, 208 (1975AJ.....80..208V 1975AJ.....80..208V)
(End) Raymond Bruton [Fort Worth], Patrick Chevalley [Geneva] 26-May-2000