| Name of map | Bibcode & ADS-link | Comments |
| G021.5-0.9 | 2001ApJ..561...308S | Chandra ACIS-S 0.1 - 6.0 keV |
| G021.5-0.9 | 2001ApJ..561...308S | Chandra ACIS-S 6.0 - 10.0 keV |
| G021.5-0.9 | 2001ApJ..561...308S | Hardness ratio map (2.4-10/0.5-2.4)keV |
| G021.5-0.9 | 2001ApJ..561...308S | ROSAT HRI contours with ACIS-S3 |
| G021.5-0.9 | 2001ApJ..561...308S | HRC-I image |
| G021.5-0.9 | 1988PASJ...40..347F | 22.3 GHz |
| G021.5-0.9 | 1988PASJ...40..347F | 22.3 GHz |
| G021.5-0.9 | 1988PASJ...40..347F | Model |
| G021.5-0.9 | 1992AJ....103..943K | VLA 327 MHz |
| G021.5-0.9 | 1990ApJS...73..781S | Einstein |
| G021.5-0.9 | 2000ApJ...533L..29S | Chandra |
| G021.5-0.9 | Chandra site | Chandra |
| G021.5-0.9 | Trushkin (1998) | RATAN 1D-scans |