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Kouji Ohnishi 大西浩次 @koujiohnishi
位置天文学衛星ガイアの最初のデーター公開が9月14日に行われます。年周視差と固有運動はTycho 2カタログ(250万個の星)と結合して得たもの+半年の星の位置、等級等のデータです。これで銀河系のイメージが変わる! scientificamerican.com/article/upcomi… #science
Kouji Ohnishi 大西浩次 @koujiohnishi
ガイアの9/14のファーストデータリリース TYCHO2カタログと連結 約2000個のクエーサーと連結 約11億個の天体測光データ(Gのみ)など巨大なデータ 銀河系の構造が詳細に見てくる。 これはすごいぞ〜。 twitter.com/brunomerin/sta…
ESA Science @esascience
#GaiaDR1: 1st data release from @ESAGaia tomorrow! Watch live from 11:30CEST. Qs via #AskESA esa.int/Our_Activities… pic.twitter.com/JtzBnVNKGH
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ESA Science @esascience
1000 days ago, on 19 Dec 2013, @ESAGaia was launched. Today, the first data will be released. Stay tuned! #GaiaDR1 pic.twitter.com/Y0p7O4MNf3
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ESA Science @esascience
Briefing on @ESAGaia 1st data release: today 11:30CEST at #ESAC. Watch livestream: esa.int/Our_Activities… #GaiaDR1 pic.twitter.com/wDfR0bZ17i
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ESA Science @esascience
.@ESAGaia is #astrometry for 21st century. Did you know the oldest known star catalogue is >2000 yrs old? sci.esa.int/gaia/history-o… #GaiaDR1
ESA Science @esascience
Briefing on @ESAGaia 1st data release starting in few minutes! Follow #GaiaDR1, livestream & questions via #AskESA: youtu.be/5pAjvQ5uu7I
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ESA Science @esascience
.@ESAGaia's 1st release briefing starting NOW: esa.int/Our_Activities… Data from #GaiaDR1 will be available after the briefing at 12:30CEST
ESA Science @esascience
We have stopped the #GaiaDR1 press event until the streaming issues are resolved. Our team is working on it. Stay tuned.
ESA Science @esascience
#GaiaDR1 programme has to continue while live stream issues are being worked. Follow for live tweets
ESA Science @esascience
Alvaro Gimenez, @esa Director of Science, presenting how astrometry with @ESAGaia is at the very core of ESA's science programme #GaiaDR1
ESA Science @esascience
A.Gimenez: @ESAGaia builds up on legacy of #Hipparcos mission, improving on completeness, faint stars, accuracy #GaiaDR1
ESA Science @esascience
A.Gimenez: @ESAGaia is not only stars. Final survey will contain ~250,000 Solar System Objects, 1,000,000 galaxies, 500,000 quasars #GaiaDR1
ESA Science @esascience
A.Gimenez: @ESAGaia data collected so far: ~490billion astrometric, ~118billion photometric, ~10billion spectroscopic measurements #GaiaDR1
ESA Science @esascience
Now on stage Fred Jansen @ESAGaia mission manager: Operating at the limits of precision to obtain most precise stellar map ever #GaiaDR1
ESA Science @esascience
F.Jansen: @ESAGaia is charting 3D positions & motions of 1billion stars by monitoring star positions at unprecedented accuracy #GaiaDR1
ESA Science @esascience
F.Jansen: To measure stellar distances: parallax – annual shift of stars in the sky #GaiaDR1 sci.esa.int/gaia/53278 pic.twitter.com/tZL3gxhoWN
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ESA Science @esascience
F.Jansen: To measure stellar velocities: proper motion + radial velocity (spectrum) #GaiaDR1 sci.esa.int/gaia/53278 pic.twitter.com/zfFoS8FBga
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ESA Science @esascience
F.Jansen: Combined effect of parallax + proper motion: stars drawing spirals on the sky. Need >1year of observations to disentangle #GaiaDR1
ESA Science @esascience
F.Jansen: @ESAGaia will scan entire sky with @Hubble_Space quality optics, down to 500,000x fainter than human eye can see at night #GaiaDR1
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