| # | Title | Status | Researcher | Start date | End date | Requested data types |
|---|---|---|---|---|---|---|
| 139 | Nova Herculis 1991 AND Outburst of 2325+43 DX Andromedae | Archived | AAVSO | 1991-03-28 (UTC) | 1991-03-29 (UTC) | Photometry |
| 138 | Nova Herculis 1991 AND Special request to monitor R Coronae Borealis stars | Archived | AAVSO | 1991-03-25 (UTC) | 1991-05-23 (UTC) | Photometry |
| 140 | Alert Notice 140: Nova Centauri 1991 AND Nova Herculis 1991 | Archived | AAVSO | 1991-03-17 (UTC) | 1991-04-04 (UTC) | Photometry, Spectroscopy |
| 137 | Last list for monitoring of ROSAT targets | Archived | AAVSO | 1991-01-14 (UTC) | 1991-01-31 (UTC) | Photometry |
