A General Catalog of HI Observations of Galaxies I. The Reference

W.K. Huchtmeier & O.-G. Richter

Summary

from hi_cat.tex:

Description of the Catalog

• -the object name in column 1;
• -the most accurate known equatorial coordinates (see below) in columns 2 and 3 (epoch 1950);
• -the morphological type (internally coded in a crude 1-byte code based on the system of the RC2 Second Reference Catalog of Bright Galaxies (de Vaucouleurs et al, 1976)) in column 4;
• -the inclination i (in degrees) used by the authors in column 5. In the rare cases where it was obvious that the authors used 90d - i this was changed accordingly. In our definition i = 0^o denotes face-on orientation;
• -the HI mass (or an upper limit to it) in one of several formats in column 7. Listed are either
  • -- the integrated flux I ( = int S dv})\ (in Jy km/s),
  • -- the reduced HI mass F_H (in 10^6 M_o/Mpc^2), denoted F, or
  • -- the derived total HI mass MHI (in 10^9 M_o), denoted M, or
  • -- the logarithm of the total HI mass, denoted L.

  Occasionally, only an upper limit for the peak flux S_max (denoted S) is given (in mJy). The codes I, F, M, L, or S are given in column 6;

• -the error of the quantity in column 7 appears in column 8. In several instances the achieved noise level S_rms for non-detections is given here. For upper limits this is, in fact, the preferred datum to be included in our catalog since it does not yet contain any assumptions made by the authors about linewidth and statistical uncertainty;
• -the radial velocity (in KMS) in column 10. If specified by the authors, the reference frame is coded (see below) in column 9. If no radial velocity was known and no HI detection was obtained by the authors we list the range in radial velocity searched for emission in columns 9 to 11 (if specified in the reference);
• -the error of the radial velocity (also in KMS) in column 11;
• -the HI line width DVF measured at 50% of the peak intensity in column 12, and
• - the HI line width Delta v_x at another (coded, see below) level in column 13, typically either at 25% or 20% of the peak flux (again in KMS).
• The code appears in column 14;
• - the distance D used by the authors (in Mpc) in column 15;
• - the optical dimensions a and b (in arcmin) used by the authors in columns 16 and 17. In rare cases (eg HI clouds) the HI size is listed;
• - the maximum rotational velocity v_max (in KMS) in column 18, and
• - the dynamical position angle p.a. (in degrees) in column 19, both derived principally from HI synthesis observations;
• - the number of the reference from where these data were taken (see Table 2a) in column 20;
• - a code for the radio telescope used (cf. Table 9), and
• - an asterisk indicating that some graphical representation of the observations (eg a profile) and/or a photograph of this object is given in the reference, both in column 21.

 If * in column (14) coordinates were taken from previos row.
 Before it was signed  -"- in name of galaxy. (by S.Trushkin)
 Number       of entries  in this list: 19976
 Number       of galaxies in this list: 10309
--------------------------------------------------------------------
	       RA          DEC     Type   I  Mtot     HI-Flux or -mass       Rad velocity Linewidths Dist  A     B            Ref TG
IC 5378        00 00 00   +16 22    SBd                Int  5.0            0  5838 +-  10     160 4        1.2   0.9           78 Ax
IC 5379        00 00 00   +16 22    S0/a               Int  1.3            0  620
NGC 7817     * 00 01 24.9 +20 28 18 Sbc    74 13.4     MHI  1.86           0  2303 +-  20           23.1                      324 N
NGC 7817     * 00 01 24.9 +20 28 18 Sbc    74 11.08Log Int 18.8            0  2312            461 5 25.3                      417 G

================================
Here we used preprint ESO No250. !!!
--------------------------------
A General Catalog of HI Observations of External Galaxies
by
W.K. Huchtmeier & O.-G. Richter, H.D. Bohnenstengel and M.Hauschildt
May 1983.
-----------------------------------

A collection of published 21-cm line (emission-) measurements of external
galaxies is presented in this catalog.
There are more than 8750 entries for a total  of nearly 4700 galaxies.(<1982)

 (in  our version of 1989)
 Number       of entries  in this list: 19976
 Number       of galaxies in this list: 10309
...

Apart from the objects name and its coordinates it contains - if given
by the authors - the following data.
- morphological type
- inclinations I used by the authors
- total mass Mtot in 10^10 solar masses,
- the HI mass: intergated flux (in Jy km/s), the reduced HI-mass  to HI-mass
  to distance of 1 Mpc, unit: 10^6 M_o/Mpc; or only the upper limit for
  the peak flux is given (in mJy).
- the radial velocity  km/s
- the linewidth  50% in km/s
- the distance used by the authors in Mpc
- optical dimensions A and B in arcmin
- the max rotational velocity Vmax in km/s,
- position angle PA in degs
- References
- Code for ids of the radio telescope