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Proposal #387

Proposer (45021) Eric Martins Marques (emmarque@gmail.com) obscode: MEMC
Assigned To(3663) Dirk Terrell
Date SubmittedAug. 4, 2023
StatusAllocated
PriorityNormal
Proposal

I present the project for photometry of some MIRA type stars located in the southern hemisphere, with some of them having no observations and other few observations. The idea of the project is to monitor and check the light curve and magnitude range of these stars.

Capture data:
300 second exposure with V filter.

Proposed stars:

AA LUP range mag. 11.8 - <16.5 p – Period 213 days.
J2000 (15 08 58.21 -48 53 32.4)

TY CHA range mag. 11.0 - <15.0 V – Period 273 days.
J2000 (11 02 06.33 -81 53 12.1)

W HYI range mag. 11.2 - 17.1 V – Period 280 days.
J2000 (00 32 40.41 -79 40 21.0)

RW APS range mag. 12.26 - <15.0 V – Period 117 days.
J2000 (14 31 33.16 -70 46 43.6)

Y APS range mag. 12.1 - <15.3 V – Period 247 days.
J2000 (14 06 05.50 -72 22 49.1)

UW MEN range mag. 10.6 - <15.0 V – Period 198 days.
J2000 (07 14 09.41 -84 45 47.0)

EH OCT range mag. 11.3 - <14.9 V – Period 193 days.
J2000 (11 39 25.20 -87 09 26.0)

CP TrA rage mag. 11.8 - <15.9 V – Period 209 days.
J2000 (16 28 57.04 -61 58 11.8)

(VSX data).

I request images with an interval of 5 to 7 days, for better data collection and a more accurate light curve.

Targets
Target RA (H.HH) Dec (D.DD) Magnitude Telescope Observation Frequency Expiration Date Proprietary Term
CP TrA 16.482511 -61.96994 15.9–11.8 BSM_S 5 Feb. 5, 2024 No
EH OCT 11.657000 -87.15722 14.9–11.3 BSM_S 5 Feb. 5, 2024 No
UW MEN 7.235947 -84.76306 15.0–10.6 BSM_S 5 Feb. 5, 2024 No
Y APS 14.101528 -72.38031 15.3–12.1 BSM_S 5 Feb. 5, 2024 No
RW APS 14.525878 -70.77878 15.0–12.26 BSM_S 5 Feb. 5, 2024 No
W HYI 0.544558 -79.67250 17.2–11.2 BSM_S 5 Feb. 5, 2024 No
TY CHA 11.035092 -81.88670 15.0–11.0 BSM_S 5 Feb. 5, 2024 No
AA LUP 15.149503 -48.89233 16.5–11.8 BSM_S 5 Feb. 5, 2024 No

Comments

(3663) Dirk Terrell — Aug. 8, 2023, 4:54 p.m.

The TAC has discussed this proposal and has doubts about its scientific usefulness, at least if only V observations are made. We will point you to

https://asas-sn.osu.edu/variables

to search for the proposed targets in the ASAS-SN database and see what data they have (a few searches show decent data on some of these). In order to have AAVSOnet resources provide additional scientific value to existing data, you would need to observe in multiple filters, perhaps BVI, although we note that these systems will be difficult to observe in B except at maximum brightness. The best approach, to avoid saturation in the longer wavelength filters at maximum brightness would be to take multiple exposures, perhaps 12x30s in V and 24x5s in I and stack them. If you agree with this approach, we are willing to approve this proposal.

(45021) Eric Martins Marques — Aug. 8, 2023, 10:04 p.m.

Hi Dirk Terrell.
Analyzing the TAC team's counter-proposal, I would like to say that I agree with the team's approach to my proposal.
I would like to suggest trying images in filter B, maybe 24x30S is possible for photometry, what I suggest, start the project and try with filter B in this configuration above, if photometry is not possible we would remove filter B from the project.

(4726) Kenneth Menzies — Aug. 9, 2023, 6:36 p.m.

committed to BSM_S

(45021) Eric Martins Marques — Oct. 23, 2023, 10:18 p.m.

Hello,

I would kindly like to ask if this project has been closed, as it has been more than a month since I have received any images. I imagined that the weather in the observatory region was bad, but I saw that there were operations.

Thank you for your attention.

Comments on this proposal are closed.