Proposal #636
| Proposer | (2559) Michelle Lierl (mlierl@fuse.net) obscode: LMI |
|---|---|
| Assigned To | (3663) Dirk Terrell |
| Date Submitted | Aug. 22, 2025 |
| Status | Allocated |
| Priority | Normal |
| Proposal | I am requesting AAVSOnet telescope time for a project sponsored by the Pandora program. They are requesting photometry observations of WASP-52 for 20 minutes each night, using a V filter. WASP-52 has a known exoplanet but the Pandora mission wants photometry measurements to be done outside of exoplanet transit times. Their goal is to analyze the baseline variability of the star, focusing on the effect of stellar rotation. |
| Target | RA (H.HH) | Dec (D.DD) | Magnitude | Telescope | Observation Frequency | Expiration Date | Proprietary Term |
|---|---|---|---|---|---|---|---|
| WASP-52 | 23.232988 | 8.76127 | 12.2–12.0 | BSM_Hamren | 1 | March 5, 2026 | No |
Comments
- (3663) Dirk Terrell — Aug. 27, 2025, 2:42 p.m.
The TAC is curious about the scientific rationale for 20-minute observing sessions. Do you have a link for the Pandora request for observations?
- (2559) Michelle Lierl — Aug. 27, 2025, 5:39 p.m.
Sure, here is the link:
https://uol-ets.slack.com/archives/C0862GV4Z9R/p1755787247616449They are looking for rotational variability.
- (2559) Michelle Lierl — Aug. 27, 2025, 5:41 p.m.
In case the link doesn't work: Here is the text of the request:
Federico Noguer
10:40 AM
@channel
Hi folks,
We’d greatly appreciate it if you could observe the host star WASP-52 over the next two months in V filter. These do not need to be transit observations, just ~20 minutes on target (before overhead) will do.
If you do happen to catch a transit with baseline, that’s fine too EXOTIC will output the variability files. Just please make sure that if you’re only doing the short 20 minute variability runs, that they are not during a transit of WASP-52 b.
We currently have about two months of nightly LCO 0.4m data, and our plan is to run the analysis three ways. LCO data only, EPW data only, and all combined. We already did a shorter pilot on another target with promising results (work in progress), but that dataset only spanned a couple of weeks. This longer baseline will not only strengthen the analysis but also highlight how Exoplanet Watch and citizen science can tackle the important challenge of determining stellar rotation periods, which are important for upcoming spectroscopy missions (like Pandora!).
Thank you so much for the help! (edited)- (4726) Kenneth Menzies — Sept. 6, 2025, 11:25 p.m.
committed to Hamren
- (2559) Michelle Lierl — Sept. 7, 2025, 2:38 p.m.
Hi, this is my first time using AAVSONet. I see my proposal was assiged to a telescope; what should I do now?
Thanks!
Michelle- (4726) Kenneth Menzies — Sept. 7, 2025, 3:10 p.m.
you will receive an email when images are distributed to your vphot account and ftp folder. email will have links.
- (2559) Michelle Lierl — Sept. 7, 2025, 3:22 p.m.
Since this star is an exoplanet host, and Pandora wants photometry of the star at baseline (non-transit) times, can I have some input as to the timing of the imaging? Also, who decides on the imaging cadence, exposure times etc?
- (4726) Kenneth Menzies — Sept. 8, 2025, 2:03 p.m.
I doubt that the nightly 20 consecutive minutes of imaging will run across a transit. If it does, just ignore that night and use the others. I doubt worrying about exact times to avoid transits will be necessary, and that is really awkward to schedule! I set the V exposure at 30 sec to get good SNR (~>100). Should resolve any stellar rotational variation.
- (2559) Michelle Lierl — Sept. 8, 2025, 9:30 p.m.
OK Thank you!
Comments on this proposal are closed.