Proposal #265
| Proposer | (36547) Lauren Herrington (lherrington@aavso.org) obscode: HLAA |
|---|---|
| Assigned To | (3663) Dirk Terrell |
| Date Submitted | May 27, 2022 |
| Status | Accepted |
| Priority | Normal |
| Proposal | Red supergiants (RSGs) are variable spectroscopically as well as photometrically, yet many of the brightest RSGs are currently underobserved, with few or no spectra available in AVSpec. In the short term, increased spectroscopic monitoring by amateurs has the potential to provide valuable data to professionals working in the fields of RSG mass loss and dust production, chemical enrichment of the interstellar medium, the search for Thorne-Zytkow objects, and more. In addition, it is currently understood that all red supergiants will inevitably go supernova; so in the long term, any quality spectroscopic data collected on the progenitor star will eventually become of extreme importance to the scientific community. This proposal includes a list of 16 red supergiants which appear brighter than magnitude 7 and are well placed for viewing from the southern hemisphere. These stars would be excellent targets for a medium- to high-resolution echelle spectrograph matched to a large telescope, such as the eShel instrument on AAVSOnet observatory OC61. The resulting spectra will be reduced by AAVSO observers Lauren Herrington (HLAA) and Brad Young (YBA), then uploaded to AVSpec. A table of information about each star (including sexagesimal coordinates), compiled using VSX, is available at the following link: https://docs.google.com/spreadsheets/d/1SFZMxUG--IvEQfqMRI3J7FYtm_aRzWSmINQ7e8N8F54/edit?usp=sharing |
| Target | RA (H.HH) | Dec (D.DD) | Magnitude | Telescope | Observation Frequency | Expiration Date | Proprietary Term |
|---|---|---|---|---|---|---|---|
| NSV 9929 | 17.984722 | -30.25306 | 5.14–5.24 | — | — | — | No |
| NSV 24050 | 17.951944 | -23.93917 | 6.54–6.68 | — | — | — | No |
| NSV 23546 | 17.723889 | -35.29778 | 6.91–7.03 | — | — | — | No |
| BM Sco | 17.683056 | -32.21444 | 5.25–6.46 | — | — | — | No |
| alf Sco | 16.490000 | -26.43194 | 0.75–1.21 | — | — | — | No |
| NSV 4720 | 10.046944 | -62.15667 | 6.38–6.43 | — | — | — | No |
| AB Pyx | 8.508333 | -36.72139 | 6.37–6.98 | — | — | — | No |
| NS Pup | 8.189167 | -39.61861 | 4.4–4.46 | — | — | — | No |
| QY Pup | 7.794167 | -15.99083 | 6.22–6.71 | — | — | — | No |
| KQ Pup | 7.563333 | -14.52389 | 4.82–5.17 | — | — | — | No |
| VY CMa | 7.382778 | -25.76750 | 6.5–9.6 | — | — | — | No |
| NSV 3503 | 7.276944 | -23.31556 | 4.78–4.89 | — | — | — | No |
| sig CMa | 7.028611 | -27.93472 | 3.41–3.51 | — | — | — | No |
| Omi 1 CMa | 6.902222 | -24.18417 | 3.78–4.09 | — | — | — | No |
| alf Ori | 5.919444 | 7.40694 | 0.0–1.6 | — | — | — | No |
| NSV 13 | 0.075000 | -10.50944 | 4.99–4.995 | — | — | — | No |
Comments
- (3663) Dirk Terrell — May 27, 2022, 10:28 p.m.
The TAC has approved this proposal but we need to develop a procedure for using the system manually since ACP can't do automated spectroscopy. Arne says:
"I'm happy to help out, and maybe we can do this after my June trip to SAS. I get back ~June9, and would need a few nights to set things up and develop a cookbook procedure."
Comments on this proposal are closed.