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Finding Charts

Table 8: List of finding charts (according to galactic longitude)
PK designation (same as in Table 1);
Name (same as in Table 1);
RA, DEC: rough coordinates (equinox 1950.0) having an accuracy 0.1$ ^{m}$, 1';
Discovery: CGPN (1967) or supplements S1-S6;
Finding charts: FC - main charts, plates Nos. 1-119 (charts for all PNe given in S1-S6 and corrected charts for objects from CGPN(1967)); C - central charts (crowded fields);
Date-Obs: UT date of observation;
P-Label: observatory plate label;
Remarks: mainly concerning finding charts and identifications.

The finding charts are given if available for all PNe which were discovered in S1-S6; we present also those charts from CGPN(1967) which (a) are wrong, (b) have uncertain identification, or (c) show no surroundings (for some bright nebulae). For the remaining objects we refer to charts given in CGPN(1967).

The identification charts are normally oriented (N at the top, W to the right) and of size 10 arcmin x 10 arcmin in general. For some large objects there are charts of size 15 or 20 arcmin square. For objects in crowded fields we give also the central part of the corresponding charts having 2 arcmin square. Such C-charts are on the same plates as the main charts and behind them. The C-charts have the same Data-Obs and P-Label as the main charts except in four cases: the corresponding deviations are indicated in Remarks.

Most objects are marked with a cross: star-like nebulae, small nebulae and central stars of large nebulae, all measured by us (Kohoutek, Kühl, 1999), as well as nebulae having accurate coordinates given in the literature. There are several PNe, the identification of which was made according to coordinates only. Such identification is of course uncertain. Nebulae without known central stars but well visible on finding charts are marked with circles. If the abbreviation `` ID '' between the PK designation and the name of the nebula appears, there is no identification (n=35). These are mainly objects not visible on our broad-band charts because the discovery pictures were taken through narrow filters only either in the visual ([NII]$ \lambda$6584, H$ \alpha$, [OIII]$ \lambda$5007) or in the near infrared ([SIII]$ \lambda$9532). In these cases, or generally in all cases, in which the exact identification of the objects could not be given, the circles indicate again their position (the centres corresponding to the discovery coordinates), and we refer to the discovery literature.

The charts were taken from the Digitized Sky Survey and their colour system is given in Table 8. The PK designation and the name of the respective object are given above each chart. If appropriate the central chart (C) and no identification ( ID) is also indicated. For greater convenience the charts are supplied with the coordinate grid using the computing programme of H. Hagen (private communication), where the scale of the charts can also be seen.

The finding charts (main charts and central charts) are published in Part 2 of the catalogue with their list given in Table 8. They are arranged according to the PK designation and correspond to Table 8. Their purpose is to give the base for identification of the objects and not for their morphology.


next up previous
Nächste Seite: Elementary Statistics Aufwärts: Contents Vorherige Seite: Explanation of Tables
Lubos Kohoutek
2001-04-02