| Name of map | Bibcode & ADS-link | Comments |
| G031.9+0.0 | 1998AJ....115.1693C | NVSS |
| G031.9+0.0 | 1998AJ....115.1693C | NVSS |
| G031.9+0.0 | 1994ApJ...425..668M | VLA 330 MHz |
| G031.9+0.0 | 1994ApJ...425..668M | VLA 1460 MHz |
| G031.9+0.0 | 1994ApJ...425..668M | VLA 4850 MHz |
| G031.9+0.0 | 1992AJ....103..943K | VLA 327 MHz |
| G039.1+0.0 | 1993AJ....105.2226R | VLA 1400 MHz |
| G039.1+0.0 | 1993AJ....105.2226R | X-ray |
| G031.9+0.0 | 1990ApJS...73..781S | Einstein |
| G031.9+0.0 | Trushkin (1998) | RATAN 1D-scans |