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VII/50 CO Radial Velocities Toward Galactic H II Regions (Blitz+ 1982)
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Catalog of CO Radial Velocities toward Galactic H II Regions
Blitz L., Fich M., Stark A.A.
<Astrophys. Journ. Suppl., 49, 183 (1982)>
=1982ApJS...49..183B
Catalog of Carbon Monoxide Observations of Southern Hemisphere H II Regions
Gillespie A.R., Huggins P.J., Sollner T.C.L.G., Phillips T.G.,
Gardner F.F., Knowles S.H.
<Astron. and Astrophys., 60, 221 (1977)>
=1977A&A....60..221G
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ADC_Keywords: Radial velocities; H II regions; Carbon monoxide; Galaxy catalogs
Description:
The catalog contains machine-readable versions of the "Catalog of
CO Radial Velocities Toward Galactic HII Regions" (Blitz et al.
1982) and the "Catalog of Carbon Monoxide Observations of Southern
Hemisphere HII Regions" (Gillespie et al. 1977) in two separate
files. The former is a catalog of 242 molecular cloud complexes
that are associated with optical HII regions and includes source
names, coordinates, CO radial velocities, antenna temperatures and
full width at half-maximum at the position of the strongest CO
emission, references for the observations, distances to the stars
exciting the HII regions, and optical diameters of the HII regions.
The latter is the first CO survey of the southern sky; it was made
using the Anglo-Australian 3.9-m optical telescope at 115 GHz
(2.6-mm wavelength) with a hot-electron bolometer receiver located
at the Coude focus. The data were collected during two observing
periods (September 1975, April 1976) and include designations,
coordinates, median values for the velocities, and distances to the
stars exciting the HII regions.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
cdradvel.dat 152 361 CO Radial Vel. toward Galactic H II regions
cosoreg.dat 138 37 CO at Southern Hemisphere H II Regions
ntesrefs.dat 72 403 Notes & References
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Byte-by-byte Description of file: cdradvel.dat
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Bytes Format Units Label Explanations
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1- 6 A6 --- ID *Source name
8- 9 I2 h RAh *Right ascension (equinox B1950) Hours
11- 12 I2 min RAm *RA Minutes
14- 15 I2 s RAs *RA Seconds
17 A1 --- DE- Sign of Declination (equinox B1950)
18- 19 I2 deg DEd *DEC Degrees of arc
21- 25 F5.2 arcmin DEm *DEC Minutes of arc
28- 33 F6.2 deg GLON1 *Galactic longitude, l(II) center region
35- 40 F6.2 deg GLAT1 *Galactic latitude, b(II)
42 A1 --- Lflag1 *[( ] uncertainty flag
43- 47 F5.1 km/s RV *Observed value of radial velocity
49- 52 F4.1 --- u_RV ? Uncertainty of radial velocity
measurement
53 A1 --- Rflag1 *[) ]? uncertainty flag
54 A1 --- Lflag2 *[( ]? uncertainty flag
55- 58 F4.1 K AntTemp *? Antenna temperature
59 A1 --- Rflag2 *[) ]? uncertainty flag
60 A1 --- Lflag3 *[( ]? uncertainty flag only for BFS42
61 A1 --- Lflag32 *[(< ]? uncertainty flag with one exception
62- 65 F4.1 km/s FWHM *? Full width at half-maximum
66 A1 --- Rflag3 *[) ]? uncertainty flag
68- 73 F6.2 deg GLON2 *? Galactic longitude, l(II) of center
strongest CO line
75- 80 F6.2 deg GLAT2 *? Galactic latitude, b(II)
82- 88 A7 --- ref *CO references
90 A1 --- Lflag4 [(> ] '(' uncertainty flag concerning distance
91- 94 F4.2 kpc Distan *?=0 Distance
96- 99 F4.2 kpc e_Distan Error of distance in kpc
100 A1 --- Rflag4 [) ] uncertainty flag concerning distance
102-108 A7 --- RefNum *Reference numbers contained in parentheses
110-115 F6.1 arcmin OptDiam *Optical diameter of the HII region
118 A1 --- DegMap *Degree of mapping toward the HII region
120-126 A7 --- RefMap *Reference numbers for the mapping contained
in parentheses.
128-152 A25 --- note *Comments.
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Note on ID:
Source name. This file contains data for 294 sources from the Sharpless
catalogue and 67 additional sources (33 of which had not been previously
catalogued) that were found by the authors on Palomar Sky Survey (PSS)
prints. Sharpless objects are indicated by an 'S' in byte 1, followed
immediately by the catalogue number. The additional HII regions are denoted
by 'BFS' in bytes 1-3, followed immediately by a sequence number. The
initial magnetic tape contained data for two other sources not presented in
the published catalogue. The sources are included in this version and have
'BFS' in bytes 1-3 without a sequence number. The records in this file have
been sorted by galactic longitude, l(II) (bytes 28-33).
Note on RAh, RAm, RAs, DEd, DEm:
Equatorial coordinates (1950) of the approximate center of light of the
HII region.
Note on GLON1, GLAT1:
Galactic coordinates (system II, 1950) of the approximate center of light of
the HII region. The file is sorted on GLON1 field.
Note on Lflag1, Rflag1, Lflag2, Rflag2:
'(' or ')' if the association of the CO emission with the HII region is
uncertain.
Note on RV:
CO radial velocity. This gives the velocity centroid of the CO emission
weighted by the intensity at each location at which the detection was made.
The uncertainty given is a 1 sigma formal error of the intensity-weighted
velocity centroid for all of the detected lines.
Several different no-data flags are provided with the following explanations:
999.9 - "No detection". No CO was detected at any of the positions observed
to the limit of sensitivity (typically 0.5K).
888.8 - "No definite detection". Weak emission was observed which is
probably unrelated to the HII region.
777.7 - "Cannot associate". Relatively strong emission was detected which
could not definitely be associated with the HII region.
666.6 - "No observation".
555.5 - "Needs extensive mapping".
If one of the above flags appears in bytes 43-47, the data in bytes 48-80
should be ignored.
Note on AntTemp:
Antenna temperature at the position of the strongest CO emission. Because,
in general, the CO emission was not mapped, this may not be the peak CO
temperature in the cloud complex. The peak antenna temperatures should
generally be accurate to at least 25 percent and in most cases to 10
percent.
Note on FWHM:
Full width at half-maximum, in km/s, of the strongest CO line. This quantity
was measured directly from the profiles and is not based on Gaussian fitting
because of the complex nature of many of the profiles.
Note on Lflag3, Lflag32, Rflag3:
'(' if there is uncertain association (see bytes 42 and 53), or '<'
indicating the value in byte 62-65 is an upper bound. For one source,
BFS42, both of the above conditions exist and bytes 60-61 are '(' and '<',
respectively.
Note on GLON2, GLAT2:
Galactic coordinates (system II, 1950) of the position of the strongest CO
line. This position rarely differs from the position in bytes 28-40 by more
than the radius of the HII region.
Note on ref:
CO references for the observation presented in the catalogue.
If more than one reference is given, the parameters of the CO line at the
peak position are generally taken from the most extensive or well-sampled
observations. The list of numbers in this field refer to those records of
file 3, ntesrefs.dat, Notes and References, with an 'R' in byte 1.
Note on Distan:
Distance, in kpc, to the star exciting the HII region. This was determined
by spectrophotometry of the stars and all cases are taken from the published
literature.
Note on RefNum, RefMap:
The list of numbers in this field refer to those records of file 3, Notes
and References, with an 'R' in byte 1.
Note on OptDiam:
Taken from the Sharpless catalogue and from measurements of the red PSS
prints for the newly catalogued sources.
Note on DegMap:
Degree of mapping toward the HII region as follows:
P = partial, E = extensive, C = complete.
A blank in this column means only a few points have been observed.
Note on note:
Comments. This area gives other identifications for the HII region and
associated objects and an indication if there is additional material in file
3 (ntesrefs.dat), Notes and References (the string '(NOTES)' will appear
if this is the case). For the additional sources found by the authors and
denoted by 'BFS' in bytes 1-4, references to other catalogues are as
follows: BER = Bernes 1977,
DG = Dorschner and Guertler 1963,
LBN = Lynds 1965,
M = Marsalkova 1974,
PK = Perek and Kohoutek 1967,
PP = Parsamian and Petrossian 1979,
RCW = Rogers, Campbell, and Whiteoak 1960.
VDB = van den Bergh 1966,
Byte-by-byte Description of file: cosoreg.dat
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Bytes Format Units Label Explanations
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1- 14 A14 --- Sname *Source designation.
16- 17 I2 h RAh Right Ascension (Equatorial coord. 1950)
19- 20 I2 min RAm RA Minutes
22- 23 I2 s RAs RA Seconds
25 A1 --- DE- Sign, always '-', of Declination
26- 27 I2 deg DEd DEC Degrees of arc (equinox 1950)
29- 33 F5.2 arcmin DEm DEC Minutes of arc
35- 41 F7.2 deg GLON *Galactic longitude, l(II), in degrees
42- 48 F7.2 deg GLAT *Galactic latitude, b(II), in degrees
51- 55 F5.1 km/s VLSR Median CO velocity (Local Standard of Rest)
57- 60 F4.1 km/s EW *Equivalent line width, in km/s.
63- 66 F4.1 K PAtt-tem *Peak antenna temperature
70- 73 F4.1 K CAtt-tem *Continuum antenna temperature at 5 GHz, Tc
74- 80 F7.1 km/s V-H109 *Velocity of the H 109 alpha line
81- 87 F7.1 km/s V-OH1 *? Velocity of the OH line
88- 94 F7.1 km/s V-OH2 *? Velocity of another strong OH line
95-101 F7.1 km/s V-OH3 *? Velocity of another strong OH line
102-111 F10.2 km/s V-H2CO1 *Velocity of the H2CO line
112 A1 --- flag1 [( ] '(' - uncertainty about the V-H2CO2 data
113-117 F5.1 km/s V-H2CO2 *? Velocity of another strong H2CO line
118 A1 --- flag2 [) ] ')' - uncertainty about the V-H2CO2 data
121-125 F5.2 kpc Distan *Distance
126-130 F5.2 kpc e_Distan Error of distance measurement
134-138 A5 --- Com *Notes
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Note on Sname:
Source designation. Names have been given for 24 of the 37 sources appearing
in this file. NGC = Sulentic and Tifft 1973, RCW = Rogers, Campbell, and
Whiteoak 1960, W = Westerhout 1958.
Note on GLON, GLAT:
Galactic coordinates (System II, 1950) of the observation.
Note on EW:
Defined as (Integration of TA* over dv)/TA* (max) where TA* is the corrected
antenna temperature, bytes 63-66.
Note on PAtt-tem:
Peak antenna temperature, TA*, corrected for atmospheric extinction and
telescope efficiency.
Note on CAtt-tem:
Continuum antenna temperature at 5 GHz, Tc. This value was taken from
Whiteoak and Gardner 1974.
Note on V-H109, V-OH1, V-OH2, V-OH3, V-H2CO1, V-H2CO2:
Comparison values for the velocities of the H 109 alpha line and the
strongest OH and H2CO lines (Wilson, et al. 1970, Whiteoak and Gardner 1974,
Caswell and Robinson 1974).
These values will be 0.0 if no data are available.
For V-OH3, a value is available only for the source listed in record 27,
all other records have 0.0 in this field.
Note on Distan:
Distance to the star exciting the HII region, in kpc. This value is 0.0 if
no distance is available.
Note on Com:
This field contains a list of letters A through E separated by commas. The
note inferred by each letter may be found in File 3 - Notes and References
by finding that letter in byte 1.
Byte-by-byte Description of file: ntesrefs.dat
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Bytes Format Units Label Explanations
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1 A1 --- DataInd *Data type indicator
2- 4 I3 --- RefNum *? Object or reference number
6- 72 A67 --- Dfield *Data field
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Note on DataInd:
Data type indicator. The character found in this byte determines how the
data in the rest of the record should be viewed. The characters used as
indicators are listed below in order of appearance in the file (the term
'data field' in the definitions refers to bytes 6-72 of the record):
S - The data field is a note for an object from
the Sharpless catalogue which was observed
by Blitz, Fich, and Stark. These objects
are indicated in file 1 by 'S' in byte 1.
See cdradvel.dat, bytes 1-6.
Blank - The data field is a note for an object found
by Blitz, Fich, and Stark. These objects are
indicated in file 1 by 'BFS' in bytes 1-3.
See cdradvel.dat, bytes 1-6.
A,B,C,D,E - The data field is a note for an object observed
by Gillespie, et al. and listed in file 2.
See cosoreg.dat, bytes 134-138.
R - The data field is a reference mentioned in
the catalogue of Blitz, Fich, and Stark.
See cdradvel.dat, bytes bytes 82-88, 102-108,
and 120-126.
The character '+' is used to indicate that the data field is a
continuation of the previous record.
Note on RefNum:
Object or reference number. If byte 1 contains 'S' or is blank, this number
is the catalogue number of the object as described in cdradvel.dat, bytes
1-6. If byte 1 contains 'R', this number is the reference number as
described in cdradvel.dat, byte 82-88, 102-108, 120-126.
Note on Dfield:
Data field. This field contains the notes and references to the catalogues
in files cdradvel.dat and cosoreg.dat.
Remarks:
The initial magnetic tape version of the catalogues described in this
document was supplied by Dr. M. Hauser, Code 693, Goddard Space Flight
Center, who obtained the tape from Dr. M. Fich. This tape contained the
major parts of the catalogue of Blitz, Fich, and Stark (1982) (BFS), and
the catalogue of Gillespie, et al. (1977) combined into one file. The file
included the source name, equatorial and galactic coordinates of the HII
region, distance of the HII region and the uncertainty in distance, CO
radial velocity and the uncertainty in velocity, and the angular diameter
of the HII region. The observational results of the two sets of authors
were separated into the two files described above in cdradvel.dat and
cosoreg.dat. The additional material that was in the published catalogues
but not on the initial tape was keypunched at GSFC and merged into their
respective files. Finally the third file, Notes and References, was keyed
in by Brotzman and Hill.
The equatorial and galactic coordinates of the center of light in the
BFS file (bytes 7-40) were checked against each other with a Fortran
program. Some discrepancies were found. Corrections were supplied by Blitz
(1983) and were incorporated into the machine-readable version. These
corrections are listed in Table 1. The coordinates of the peak CO position
(bytes 68-80) reflect corrections for two objects, which are also given.
The round-off errors had been introduced into several of the published
galactic coordinates. Although these errors were of no practical
importance, recalculated values were substituted for the sake of
consistency.
Table 1. Errata in Blitz, Fich and Stark (1982) file
PUBLISHED MACHINE-READABLE
VALUE VALUE
OBJECT DATUM (ERRATUM) (CORRECTION)
S18 RA 17 44 36 17 44 18
S26 RA 17 54 30 17 55 18
DEC -23 20 -23 26
l 6.10 6.19
b 0.56 0.35
S30 RA 17 59 36 17 59 30
l 7.04 7.03
b -0.26 -0.28
S61 RA 18 30 18 18 30 42
DEC -5 2 -5 1
l 26.36 26.44
b 1.82 1.74
S143 DEC 58 0 57 30
l 107.29 107.23
b -1.43 -1.34
S195 RA 2 36 6 2 36 18
l 136.36 136.28
b -0.38 -0.41
S200 RA 3 2 30 3 6 30
b 4.12 4.11
S220 RA 4 58 0 3 58 0
DEC 46 16 36 16
l 160.76 160.31
b -12.27 -12.34
S238 RA 4 19 42 4 19 6
S265 RA 5 15 54 6 7 24
DEC 7 23 13 20
l 195.08 196.39
b -16.78 -2.86
BFS17 b(CO) 0.21 0.02
BFS18 b(CO) 0.16 0.02
BFS20 RA 0 31 2 0 31 39
l 121.48 121.45
Acknowledgements:
The original ADC documentation by Lee E. Brotzman and Robert S. Hill
(1983) was used to create this ReadMe file.
References:
Bernes, C. 1977, Astr. Ap. Suppl., 29, 65.
Blitz, L., Fich, M., and Stark, A. A. 1982, Ap. J. Suppl., 49, 183.
Blitz, L. 1983, private communication.
Caswell, J. L., and Robinson, B. J. 1974, Australian J. Phys., 27, 597.
Dorschner, J., and Guertler, J. 1963, Astr. Nach., 287, 257.
Gillespie, A. R., Huggins, P. J., Sollner, T. C. L. G., Phillips, T. G.,
Gardner, F. F., and Knowles, S. H. 1977, Astron. and Astrophys., 60, 221.
Lynds, B. T. 1965, Ap. J. Suppl., 12, 163.
Marsalkova, P. 1974, Ap. Space Sci., 27, 3.
Parsamian, E. S., and Petrossian, V. M. 1979, Acad. Nauk. Armenian SSR.
Perek, L., and Kohoutek, L. 1967, Catalogue of Galactic Planetary Nebulae,
Prague, Czech Institute of Science.
Rogers, A. W., Campbell, C. T., and Whiteoak, J. B. 1960, M.N.R.A.S., 121,
103.
Sharpless, S. 1959, Ap. J. Suppl., 41, 257.
Sulentic, J. W., and Tifft, W. G. 1973, The Revised New General Catalogue
of Nonstellar Objects, Univ. of Arizona Press, Tuscon, Arizona.
van den Bergh, S. 1966, A. J., 71, 990.
Westerhout, G. 1958, Bull. Astron. Inst. Neth., 14, 215.
Whiteoak, J. B., and Gardner, F. F. 1974, Astron. Astrophys., 37, 389.
Wilson, T. L., Mezgar, P. G., Gardner, F. F., Milne, D. K. 1970, Astron.
Astrophys., 6, 364.
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(End) C.-H. Joseph Lyu [Hughes STX/NASA] 17-Jul-1996