Posting at @mattkenworthy@mastodon.social - once tweetdeck access goes, I'll be gone. Many thanks everyone, this was fun!
Feb 7, 2019 • 21 tweets • 14 min read
As an astroinstrumentation person, Rauscher+ has a fascinating paper on "Principal Component Analysis of Up-the-ramp Sampled IR Array Data" on @arxiv today - let me explain why it's really intriguing: arxiv.org/abs/1902.02312 1/n@arxiv So, for many infrared detectors, we don't read out a single image, but instead a series of images taken one after the other, that sample the flux as it's being gathered from the sky - this is called 'up the ramp' sampling, and it allows a couple of neat tricks 2/n
May 8, 2018 • 15 tweets • 5 min read
Okay, I've had to keep my mouth shut for several months but now I can talk about this amazing object in orbit around CS Cha! Here's the paper led by Christian Ginski at @SterrewachtNL : arxiv.org/abs/1805.02261 (disclosure: I am a coauthor on the paper)
So: CS Cha is a very young binary star system, with a dust disk surrounding a binary star system. Starlight is unpolarised, but light that bounces from the dust in the surrounding disk is polarised, as seen in the image below 2/n
