Jason Wright @Astro_WrightReplying to @paulsanderson and @tsboyajianWe are down about 3% in r
Aww Tony, you're famous ;https://arstechnica.com/science/2017/05/tabbys-star-is-dimming-again-and-astronomers-are-excited/
With a justified proposal, we could observe #tabbysstar on 5/24/17 with the FPI+ camera. The infrared instrument is EXES on that flight.
I'll be getting a spectrum with the echelle on the APO ARC 3.5 m tonight near sunrise
There are others in the pipeline, I think, but not confirmed yet
UC Berkeley SETI @BerkeleySETIJoin us in 45 minutes (11am PDT) for a live chat with @Astro_Wright on the latest @tsboyajian Star observations
Kepler simply suffered a malfunction. There's no possible physical explanation between the star and the telescope. The error is between the telescope and us.
When the experts are agreed, the opposite opinion cannot be held to be certain.
Jason Wright and Breakthrough Listen astronomer Andrew Siemion were on the video. There is some credible talk that this does help establish a periodicity to the dips, which would rule out anything in the ISM. Jason also said that he's not optimistic about getting ALMA on the star because of its very low elevation angle. We should get spectra from several telescopes, including Keck, but Spitzer wil not be on it. Swift can give us UV measurements, but the error bars are relatively large. No mention of Hubble, or did I miss it?
Jason Wright @Astro_WrightYes please! Most useful photometry is probably widest coverage (to constrain reddening) combined with good night-to-night precision. Zachary Vanderbosch @ZachVanderboschReplying to @tsboyajian and 9 othersI'm observing with McDonald 2.1m tonight, simultaneous multi-color photometry is possible. What are the most useful Sloan filters?9:34 pm · 19 May 2017
This has just been posted on the relevant Reddit.QuoteJason Wright and Breakthrough Listen astronomer Andrew Siemion were on the video. There is some credible talk that this does help establish a periodicity to the dips, which would rule out anything in the ISM. Jason also said that he's not optimistic about getting ALMA on the star because of its very low elevation angle. We should get spectra from several telescopes, including Keck, but Spitzer wil not be on it. Swift can give us UV measurements, but the error bars are relatively large. No mention of Hubble, or did I miss it?Longer summary here.https://www.reddit.com/r/KIC8462852/comments/6c546t/live_chat_soon_with_jason_wright_about_the/dhs0mwo/?context=3
Quote from: jebbo on 05/19/2017 05:30 pmThere are others in the pipeline, I think, but not confirmed yetCan they get time on Hubble, there is DDT after all?
But it's high S/N spectroscopy you want here, not imaging, and that's ground-based stuff, and getting a TO (target of opportunity) observation is a lot more straightforward on the ground. A UV spectrum with HST to look for enhanced interstellar absorption lines might be worth doing, but there are enough optical features to tell you if it's a dust cloud.
This is exciting!
But it's high S/N spectroscopy you want here, not imaging, and that's ground-based stuff, and getting a TO (target of opportunity) observation is a lot more straightforward on the ground. A UV spectrum with HST to look for enhanced interstellar absorption lines might be worth doing, but there are enough optical features to tell you if it's a dust cloud. This is exciting!
Quote from: jgoldader on 05/19/2017 10:45 pmBut it's high S/N spectroscopy you want here, not imaging, and that's ground-based stuff, and getting a TO (target of opportunity) observation is a lot more straightforward on the ground. A UV spectrum with HST to look for enhanced interstellar absorption lines might be worth doing, but there are enough optical features to tell you if it's a dust cloud. This is exciting!As much spectroscopy as possible :-) particularly as the observations that showed the first hints it was misbehaving detected H-alpha (and weaker Ca II H & K) emissions, which haven't been seen before. [ see link ]https://angelrls.wordpress.com/2017/05/20/mysterious-tabbys-star-dims-again-observations-needed/Nice that the Kickstarter has paid off. And yes, very exciting!I know we were offered Keck LGS last night by the scheduled observer, but not sure more AO will tell us much. Though I suspect this has morphed into different observations (hints about HIRES from Jason).--- Tony
H-alpha emission would seem to point towards something going on with the star itself, not just interstellar of circumstellar material blocking the light. Hard to think what exactly, though...