Proposal #221
| Proposer | (36239) Rich Roberts (richard.w.roberts74@gmail.com) obscode: RRIA |
|---|---|
| Assigned To | (3663) Dirk Terrell |
| Date Submitted | July 24, 2021 |
| Status | Allocated |
| Priority | Normal |
| Proposal | At the last section leader meeting, it was suggested utilizing the BSM to monitor more scientifically relevant LPVs. To determine potential targets, I utilized a list of 51 pulsating red giant stars which are exhibiting unusual/and or changing behaviors which was published by Dr. Percy in 2017. These stars are all exhibiting some sort of period and/or amplitude change. I looked in the AID to see how well each of these stars is being covered photometrically. Most of the stars are covered visually, but would benefit from precise multi-band photometry. Each star fell into 1 of 4 broad categories, well-covered, sporadically/inconsistently covered (qty 5), well-covered in the past but not recently (qty 8), and not covered at all (10). One star did not fit into these categories as it was well covered for 1 cycle, but not covered otherwise. The stars which were well covered and but are no longer is the result of a high-level observer shifting his focus from LPVs to studying rotation in asteroids. I propose initiating BSM multi-band photometry coverage (B, V, R, I) for the 24 stars which are inconsistently covered, no longer covered, or not covered at all. Observations every 10-14 days for each will be sufficient to monitor for further changes in behavior from these stars. |
| Target | RA (H.HH) | Dec (D.DD) | Magnitude | Telescope | Observation Frequency | Expiration Date | Proprietary Term |
|---|---|---|---|---|---|---|---|
| R Aql | 19.106181 | 8.23000 | 12.0–5.5 | BSM_NH2 | 7 | Feb. 13, 2022 | No |
Comments
- (36239) Rich Roberts — July 24, 2021, 6:39 p.m.
I submitted 24 targets. Did all go through because I only see 1 displayed here?
- (3663) Dirk Terrell — July 27, 2021, 2:37 a.m.
There is a bug in the proposal software causing this problem. Please list the 24 targets in a comment.
- (36239) Rich Roberts — Aug. 11, 2021, 7:36 p.m.
Name coords RA DEC Const Type Period Max Mag Min mag covered whats happening
1 R Aql 19 06 22.25 +08 13 48.0 286.59271 8.23 Aql M 270.5 5.5 12 kinda Period and Amp decreasing
2 RR Aql 19 57 36.06 -01 53 11.3 299.40025 -1.88647 Aql M 396.1 7.8 15 not recently Large 4700 day variation in mag
3 R Cap 20 11 18.35 -14 16 03.4 302.82644 -14.2676 Cap M 343 8.9 14.9 no Mean mag varies slowly
4 SV Cas 23 39 01.42 +52 15 44.9 354.75592 52.26247 Cas SRA 264.5 6.8 10.2 no period switching
5 Z Cas 23 44 31.54 +56 34 52.4 356.13142 56.58122 Cas M 492.3 8.2 15.5 not recently variation in amp
6 R Cen 14 16 34.32 -59 54 49.3 214.143 59.91369 Cen M 502 5.3 11.8 kinda Period decreasing, DM
7 V CrB 15 49 31.31 +39 34 17.9 237.38046 39.57164 CrB M 357.63 6.9 12.7 kinda Mean mag varies slowly
8 LX Cyg 21 55 57.03 +48 20 52.5 328.98761 48.34792 Cyg M 588 9.1 15.1 kinda period increasing, A decrearing
9 RZ Cyg 20 51 53.18 +47 21 20.4 312.97158 47.35567 Cyg SRA 275.69 9.8 14.1 not recently period switching
10 Y Del 20 41 38.98 +11 52 38.3 310.41242 11.87731 Del M 469.2 8.8 18 not recently Amp varies as well as mean slowly
11 R Hya 13 29 42.78 -23 16 52.8 202.42825 -23.28133 Hya M 380 3.5 10.9 no Period and Amp decreasing
12 RT Hya 08 29 41.15 -06 19 07.6 127.42146 -6.31878 Hya SRB 245.5 7 10.2 no A slowly varies
13 T Hya 08 55 39.84 -09 08 29.3 133.916 -9.14147 Hya M 291 6.7 13.5 1 recent cycle amp varies slowly
14 V Hya 10 51 37.25 -21 15 00.3 162.90521 -21.25008 Hya SRA 530.7 6 12.3 no slow variations in mean mag
15 RS Lac 22 12 52.53 +43 45 00.8 333.21888 43.75022 Lac SRD 237.26 9.6 12.5 not recently slow variations in mean mag
16 RY Leo 10 04 15.91 +13 58 57.7 151.06629 13.98269 Leo SRB 155 9 11.8 kinda complex power spectrum
17 R Lep 04 59 36.35 -14 48 22.5 74.90146 -14.80625 Lep M 445 5.5 11.7 no slow variations in mean mag
18 S Lyr 19 13 11.80 +26 00 28.1 288.29917 26.00781 Lyr M 438.4 9.3 16 not recently mean and max mag varies
19 U Lyr 19 20 09.15 +37 52 36.1 290.03813 37.87669 Lyr M 451.72 8.3 13.5 not recently mean mag and amp varies
20 S Pav 19 55 13.96 -59 11 44.3 298.80817 -59.19564 Pav SRA 390 6.6 10.4 no A varies, min varies
21 RT Sco 17 03 32.56 -36 55 13.7 255.88567 -36.92047 Sco M 449.04 7 15.2 no large amp decrease
22 Z Sco 16 06 00.70 -21 43 59.6 241.50292 -21.73322 Sco M 343.03 8.7 13.4 no A varies
23 Z Tau 05 52 24.86 +15 47 43.8 88.10358 15.7955 Tau M 446 9.5 18 no Period decreasing, A increasing
24 RU Vul 20 38 52.69 +23 15 31.2 309.71954 23.25867 Vul SRB 107.4 8.3 11 not recently Period decreasing, A increasing- (4726) Kenneth Menzies — Aug. 17, 2021, 4:59 p.m.
Committed to NH2, NM and Berry. Check exposures. They are set for max magnitude and assume stacking to help at min mag.
Ken
Comments on this proposal are closed.