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There is a region called Baade's window.

I remember there is a similar region called "somebody's window", which also has a low amount of dust.

Does anyone know the name?

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The Lockman hole?

http://en.wikipedia.org/wiki/Lockman_Hole

It has a column density of neutral hydrogen of $6\times10^{19}$ cm$^{-2}$, which will correspond to very little dust.

Two others I've heard of towards the Galactic bulge are known as the Sgr I and Sgr II windows.

Finally, I offer "Stanek's window" towards the bulge, which has been referred to in a number of the Chandra Galactic plane X-ray surveys but appears to have no refereed publication associated with its discovery. I found this on arXiv. http://arxiv.org/abs/astro-ph/9802307 It is at $l=0.25$, $b=-2.15$ and has $E(B-V) \sim 0.6$.

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  • $\begingroup$ good, this is the one I want to find. $\endgroup$ – questionhang Dec 10 '14 at 1:17
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Puppis Window? (Neutral hydrogen observations towards the Puppis Window of the Milky Way)

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I think you are talking about Plaut's window, which is located at l=0° and b=-8°. It has a reddening of E(B-V)=0.25 magnitudes.

HTH,

Germán.

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  • $\begingroup$ not this one. There are other astronomical items called XX window? $\endgroup$ – questionhang Dec 8 '14 at 20:36
  • $\begingroup$ You said with low amount of dust, which means low extinction for me... $\endgroup$ – skytux Dec 8 '14 at 21:48
  • $\begingroup$ my bad. There should be a more famous window. $\endgroup$ – questionhang Dec 9 '14 at 2:19

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