Minutes
1) Dear Dr. Perdereau: I am pleased to let you know that your corrected article has been published in Monthly Notices of the Royal Astronomical Society. The links to your article that we previously sent to you will now direct readers to the final corrected article. For information on how you can share and promote your article, please visit https://academic.oup.com/journals/pages/information-for-authors. We will shortly be in touch to invite you to complete a brief survey about your experience publishing with Oxford University Press.Thank you for publishing in Monthly Notices of the Royal Astronomical Society, and we hope to publish with you again soon.
Best wishes,
Author Support Team
2) The UW internal TAC for WIYN observing time met last Friday and decided to award your observing program 2 nights of dark time in semester 23A. The oversubscription rate for UW's WIYN time in 23A was 1.66:1, so on average proposals for this coming semester received 60% of their time request
Proposal: A Spectroscopic Galaxy Redshift Survey Near the NCP
TAC score: 7.3 / 10
TAC comments: The proposal would have been strengthened by an explicit discussion about why the existing observations taken for this program over the last few semesters are not sufficient for publication. The TAC will likely not be inclined to grant time to this project in the future without such a discussion in any future proposals. As a technical note: the proposal form requests 3 nights of observations, but the proposal text requests 20 hours of time. NOIRLab equates 1 night as 10 hours of observing time, so this allocation of 2 nights should be enough to complete this project as per the last paragraph of the science justification.
3) Continued discussion of designing the outriggers for the TCA. Xuelei reports that they will build 3. Each will be 13m x 24m, somewhat shorter than the current cylinders, to reduce costs. Ue-li says that CHIME can use longer baselines by recording the raw data with high enough time resolution to use the time delay between antennas to determine the precise position of a source. 1 minute of data is buffered and then stored if there is a trigger. Institute of Automation has been asked whether this is possible for us. Another issue is calibration. For cylinders within a few km, perhaps we can place a CNS on a tall tower. (Or, we can consider mounting synchronized CNS' on each cylinder, as CHIME does.) For longer baselines, VLBI people use atomic clocks.
4) More discussion of radio signatures of decaying/ annihilating dark matter. Albert reports that there may be some modulation of the line signal as the Galaxy drifts through the beam. This favors observations away from the NCP. Decays into two-photons can also be stimulated by photons. So one could look in the opposite direction on the sky from bright radio sources. This provides an extremely useful spatial modulation of the signal and gives preferred positions to integrate on.
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