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SCstarcourier.bsky.socialSep 25, 2024 9:53pm

[2409.12793] Venkata Suresh Narra et al.: Calibration of Spectropolarimetry channel of Visible Emission Line Coronagraph onboard Aditya-L1. link

tinywings.bsky.socialSep 25, 2024 5:54am

생명을 찾으려면 다른 항성에 딸린 외계행성들을 관측해야 하는데 이들은 항성의 빛 때문에 관찰이 힘듦. 그래서 코로나그래프 (coronagraph)라는, 망원경 내에서 항성 빛을 막아주는 장치가 있는데 이 장치는 오래 전부터 쓰여 왔지만 로만 망원경에는 더 발전되고 정교한 코로나그래프가 들어갈 거라고. 왼쪽은 코로나그래프의 원리를 쉽게 설명한 것. 오른쪽은 코로나그래프에 들어갈 실리콘 웨이퍼.

ZZZhiZhu.newsie.social.ap.brid.gySep 23, 2024 10:06am

It's a long article and well worth reading for yourself, so here's a #GiftArticle #GiftLink https://wapo.st/4dlJP8S #photos #Science #Space #Technology #Tech #SciFi #News #USA

Photo with caption:
Vanessa Bailey is an instrument technologist for the coronagraph, a starlight suppression instrument targeted for the Nancy Grace Roman Space Telescope. (Jay L. Clendenin for The Washington Post)

Photo with caption:
Nancy Grace Roman, fourth from right, stands with a group of scientists and engineers in 1964 in front of Orbiting Astronomical Observatory 1, NASA’s first attempt at an orbiting telescope. (NASA)

Photo with caption:
What the center of the Starshade would look like as it is being deployed in space. (Jay L. Clendenin for The Washington Post)

A schematic consisting of text and illustrations:

How the starshade could work:
This schematic represents the starshade and the telescope it would support.

The two spacecrafts would separate in space. The starshade would unfold and expand to almost the size of a baseball diamond.

The starshade and telescope would operate at as much as 50,000 km apart (31,000 miles). That's almost four times the Earth’s diameter. Source: NASA's Jet Propulsion Laboratory/Caltech

ZZZhiZhu.newsie.social.ap.brid.gySep 23, 2024 9:49am

"She did months of #research #data #planet #JPL [Original post on newsie.social]

Text from article:
She did months of research, confirming the data, until she was sure she had actually found a new planet. And, soon, it had a name: HD 106906 b. “It doesn’t exactly roll off the tongue,” she says. But it was her find. Still, she shrugs off talk that it was anything approaching an individual accomplishment. There was no particular celebration at the university. “I got an article in the student newspaper, but yeah, there wasn’t a paper in Science [magazine] or anything.”

This is a good moment to emphasize that no one at JPL — no one I met, at least — was willing to take credit for anything. Starting with Bailey, there was such a relentless emphasis on teams and groups and predecessors, and such a deep unwillingness from anyone to put themselves forward, or to talk too much, or above all take credit for anything. Bailey was insistent that I talk to the head of the coronagraph team, Bertrand Mennesson — and I did; he is French; we’ll get to him soon — and was so embarrassed to be interviewed at all, and the JPL media team was so insistent that I talk to this person and that person, that it made writing this essay very difficult and probably very unfair. Bailey is one of about 75 people on the core coronagraph team, and the coronagraph is only one part of the Roman telescope, which is also looking for dark matter and the beginnings of the universe — a worthy topic but not for us, not today.

ABkrxiv-astro-ph.bsky.socialSep 20, 2024 6:14am

High-contrast imager for complex aperture telescopes (HiCAT): 11. System-level demonstration of the Apodized Pupil Lyot Coronagraph with a segmented aperture in air https://arxiv.org/pdf/2409.12931 Rémi Soummer et al.

High-contrast imager for complex aperture telescopes (HiCAT): 11. System-level demonstration of the Apodized Pupil Lyot Coronagraph with a segmented aperture in air

arXiv abstract link

ABkrxiv-astro-ph.bsky.socialSep 20, 2024 6:14am

Calibration of Spectropolarimetry channel of Visible Emission Line Coronagraph onboard Aditya-L1 https://arxiv.org/pdf/2409.12793 Venkata Suresh Narra et al.

Calibration of Spectropolarimetry channel of Visible Emission Line Coronagraph onboard Aditya-L1

arXiv abstract link

Aastrobiology.bsky.socialSep 10, 2024 5:05pm

Unveiling Habitable Planets: Toy Coronagraph Tackles The Exozodiacal Dust Challenge astrobiology.com/2024/09/unve...#astrobiology #astronomy #exoplanet #interstellar

Unveiling Habitable Planets: Toy Coronagraph Tackles The Exozodiacal Dust Challenge - Astrobiology

Directly imaging Earth-like exoplanets within habitable zones is challenging

ECexocourier.bsky.socialSep 10, 2024 3:52am

[2409.05781] Lisa Altinier et al.: ESCAPE project. CAPyBARA: a Roman Coronagraph simulator for post-processing methods development. link

ECexocourier.bsky.socialSep 10, 2024 3:52am

[2409.05797] Yu-Chia Lin: Unveiling habitable planets: Toy coronagraph tackles the exozodiacal dust challenge. link

SOoksettledown.bsky.socialAug 30, 2024 5:24pm

direct IR imaging of exoplanets by obscuring the star with a coronagraph🔭🛰️