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Stars databes download?

by tris_d
Tags: databes, download, stars
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tris_d
#1
Nov19-12, 02:54 PM
P: 162
Stars database download?

I found "NStars", it sounds like they have what I'm after, but the site is not online as is currently undergoing major redesign. Is there any other place? I'm looking for coordinates data, size, spectrum, luminosity and such. Maybe some free Astronomy program comes with such database I could open outside the program and extract the data in .txt file?
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Chronos
#2
Nov19-12, 03:12 PM
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Try Vizier.
tris_d
#3
Nov19-12, 07:31 PM
P: 162
Quote Quote by Chronos View Post
Try Vizier.
Thank you. I don't see distances though, is there some particular type of database I need to look for that would contain information about the distance as well?

Chronos
#4
Nov19-12, 11:20 PM
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Stars databes download?

The Vizier database is incomplete on many counts. Here is a catalog you may find more helpful - http://www.atnf.csiro.au/research/pulsar/psrcat/
enosis_
#5
Nov19-12, 11:28 PM
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Quote Quote by Chronos View Post
The Vizier database is incomplete on many counts. Here is a catalog you may find more helpful - http://www.atnf.csiro.au/research/pulsar/psrcat/
Great link - thank you Chronos!
tris_d
#6
Nov20-12, 07:14 AM
P: 162
Quote Quote by Chronos View Post
The Vizier database is incomplete on many counts. Here is a catalog you may find more helpful - http://www.atnf.csiro.au/research/pulsar/psrcat/
Thank you. That looks great on the first sight, I'll just need to figure out how to make queries and see if I can get what I need, but even though it seems complicated I certainly like the various options to customize the output as that should prove useful once I figure it out.

Now, this is completely new to me, I need the data to incorporate it in my software, but I am not astronomer so I'm struggling to interpret it. Could you tell me if the light arriving from the stars in those databases is given as monochromatic, that is as being a single wavelength, perhaps some average, or is it more complicated than that?
chasrob
#7
Nov20-12, 07:03 PM
P: 37
Quote Quote by tris_d View Post
Stars database download?

I found "NStars", it sounds like they have what I'm after, but the site is not online as is currently undergoing major redesign. Is there any other place? I'm looking for coordinates data, size, spectrum, luminosity and such. Maybe some free Astronomy program comes with such database I could open outside the program and extract the data in .txt file?
Nstars is nearby stars, is that what you're interested in? RECONS has an annoted list of nearby stars.
Chronos
#8
Nov20-12, 08:51 PM
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Spectral data is usually given in a narrow band pass [a restricted range of wavelengths]. There may be some composite results, like bolometric magnitude. The band pass data will give intensity at the wavelength measured and probably the cutoffs used.
tris_d
#9
Nov20-12, 09:13 PM
P: 162
Quote Quote by chasrob View Post
Nstars is nearby stars, is that what you're interested in? RECONS has an annoted list of nearby stars.
Nearby stars for start. However that link will not open for me, looks as if the server is busy. I'll try later on.
tris_d
#10
Nov20-12, 09:17 PM
P: 162
Quote Quote by Chronos View Post
Spectral data is usually given in a narrow band pass [a restricted range of wavelengths]. There may be some composite results, like bolometric magnitude. The band pass data will give intensity at the wavelength measured and probably the cutoffs used.
Thank you.
tris_d
#11
Nov21-12, 01:48 AM
P: 162
Quote Quote by chasrob View Post
Nstars is nearby stars, is that what you're interested in? RECONS has an annoted list of nearby stars.
It works now. Great.

Can someone explain a little bit more about column 9:

- V magnitude is a measure of brightness at wavelengths centered near 5500 Angstroms, similar to the the color of light to which human eyes are most sensitive; larger positive numbers are fainter stars, where each factor of 2.5 in brightness is one magnitude; under good sky conditions, the eye is sensitive to magnitudes as faint as V = 6



a.) Would this be "white light" where larger number represent darker shade of gray?

b.) V=7 is "black" to human eye, but with longer exposure appears as lighter shade of gray?
chasrob
#12
Nov21-12, 04:42 AM
P: 37
There's also the Gliese Catalog of Nearby Stars, containing nearly 4000 stars. You can download it in txt form.


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