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Introduction

This is the updated version of the ``Catalogue of Galactic Planetary Nebulae'' (Perek, Kohoutek, 1967) and includes the objects classified as PNe or possible PNe until 1965 and presented in CGPN(1967), as well as in the following supplements:
S1 - new objects published in 1966-1977,
S2 - 1978-1981,
S3 - 1982-1986,
S4 - 1987-1990,
S5 - 1991-1994,
S6 - 1995-1999.
Supplements S1-S5 to CGPN(1967) have been published (Kohoutek 1978, 1983, 1989, 1992, 1997), whereas the last Supplement 6 is only available from the author.

This version CGPN(2000) is a continuation of CGPN(1967). Moreover it has two new lists which appeared in Supplements 4, 5 and 6 only: the list of pre-PNe and the list of post-PNe. They deal with objects which have not been classified as regular PNe, but which are as we believe in the evolutionary stage before PNe (pre-PNe) and after PNe (post-PNe), respectively. These lists are incomplete and reflect the opinion of their authors.

We still use equinox 1950.0 of coordinates in all tables for various reasons. But rough coordinates of all PNe given in equinox 2000.0 are also listed (Table 2).

As in CGPN(1967) the definition of a planetary nebula has been taken in a rather wide sense. The total number of PNe is at present 1510 (classified till the end of 1999): 1183 objects classified more or less reliably as planetary nebulae; in addition 327 possible planetaries (denoted in the tables with an * ). Meanwhile 245 objects have been removed for different reasons from the CGPN(1967) and from the Supplements as misclassified PNe; there certainly exist also objects in the present version of the Catalogue which do not belong here. The definitive classification of the objects is not at all simple.

Planetary nebulae are presented in this catalogue independently of the fact whether the objects are confirmed PNe or possible PNe (asterisk behind the designation), which fact may change already in the near future.

There are several objects called proto-planetary nebulae (PPNe). One of the first lists of such objects was compiled and published in S1. The particular list of PPNe does not exist in this catalogue: PPNe can be found either in the main list of PNe (Table 1), or in the list of possible pre-PNe (Table 5). The separation of these two categories is not reliably defined.

CGPN(1967) included all observational data on the objects. The amount of such data increased to such an extent in the last thirty years that we found it necessary to restrict ourselves only to the data belonging to the location and identification of the objects, i.e. to coordinates as well as to finding charts. For the remaining data one may refer to SIMBAD (CDS, Strasbourg, France) as well as to the literature concerning the individual objects.

The Hubble Space Telescope is of great importance for the study of PNe, particularly concerning the morphology of PNe and the binarity of their nuclei. There are several other satellites which contributed essentially to the increase of our knowledge of PNe, especially HIPPARCOS, IUE, IRAS, ISO and ROSAT. Although the contribution of telescopes on satellites is increasing very much and investigation of PNe in certain spectral regions is only possible from beyond the Earth's atmosphere, the majority of the data on PNe is at present still produced at observatories on the ground.

Unfortunately the AAO/UKST H$ \alpha$ Survey (Parker et al., 1999 and earlier announcements) could not be included in this updated version. This extensive 3-hour H-alpha photographic survey was started in 1997, should be completed in 2000/2001, and it is expected that >1000 new PNe will be found.

The structure of larger objects (>4 arcsec) in the northern sky can be seen in The IAC Morphological Catalog of Northern Planetary Nebulae (Manchado et al., 1996), which shows the sometimes complicated morphology of the objects called planetary nebulae. The structure of very large objects (>8 arcmin) is visible in the Atlas of Ancient Planetary Nebulae (Tweedy, Kwitter, 1996).

Valuable information about the objects including their identification charts can be found in the Strasbourg-ESO Catalogue of Galactic Planetary Nebulae (Acker et al.,1992-SECGPN) and in its First Supplement (Acker et al.,1996-S1 to SECGPN), where also the lists of publications are given. The classification criteria are somewhat different in SECGPN compared with CGPN, so that the objects included in both catalogues slightly differ.

This updated version does not contain identification charts of all objects. We do not repeat those charts which have already been published in CGPN(1967), except some charts having wrong or uncertain identification. Concerning the correct charts, which is the large majority, the user of the present version is referred to CGPN(1967). In CGPN(2000) the identification charts are mostly of objects discovered after 1965 which were included in the Supplements.

The idea of publishing the updated version of CGPN arose in the year 1976, and this was mentioned in Supplement 1. We remind the reader that the publication of CGPN was discussed already at the meeting of Commission 34 at the XII General Assembly of the I.A.U. in Hamburg, August 1964. This has been described in more detail in CGPN(1967).


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Nächste Seite: Scope of the Catalogue Aufwärts: Contents Vorherige Seite: ABSTRACT:
Lubos Kohoutek
2001-04-02