The X-Ray Galactic SNR Catalog

Galactic SNRs: Summary X-Ray Data

F. D. Seward
Harvard-Smithsonian Center for Astrophysics
60 Garden Street
Cambridge, MA 02138

Taken from Seward 1990 Ap.J. Suppl. 73, 781.

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Einstein data for SNR are available as images on magnetic tape or diskette and as tables of counting rates. These have been published in the Astrophysical Journal Supplements (Seward, 1990), and preprints are available on request. This Catalog contains 3 tables. For details please see the published article referenced above.

The sections of this document are given below. Click on Table # to go directly to that table.

1. Tables

Table 1: Index to FITS images.

Table 2. Count rates in Einstein Detectors.

Table 3. Unresolved X-ray Sources within or nearby the Cataloged Supernova Remnants

2. Images - Table 1

The smoothed (or deconvolved) images are available in FITS format in Table 1.

3. Counting Rates of SNR - Table 2

4. Unresolved Sources Close to or within SNR - Table 3

Table 3 lists characteristics of point-like HRI or IPC sources found within fields containing the SNR in table 1. The list is not necessarily complete. There were no computer algorithms available to reliably search for point sources in the presence of bright diffuse emission. We have listed sources encountered during visual inspection and analysis of the data.

Aside from the obvious interest in objects which might be neutron stars formed in the SN explosion, this table is a useful supplement to other catalogs which sometimes do not search "messy" fields for weak sources. IPC and HRI rates quoted are total counting rates in the detector. All energy channels of the IPC are included and corrections have been made for mirror-scattering and dead time. Identifications are given when known and in these cases the coordinates listed are those of the optical or radio counterpart. If the source is not identified, the coordinates are those derived from IPC or HRI data.

Sources are listed as being outside the boundary of the SNR(O), inside the boundary, (I), or at the approximate center of the SNR (C).