Questions tagged [data-analysis]
Analysis of data is a process of inspecting, cleaning, transforming, and modeling data with the goal of discovering useful information, suggesting conclusions, and supporting decision making.
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Reduced chi square value
I am currently plotting a continuum of observed data. I need to check the effectiveness of the fitted continuum with the reduced chi-square method. Ideally, should the reduced chi-square value ...
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What is the most common activity of astronomers in the JWST? [closed]
I am no astronomer. I am a computer scientist.
I recently read this article: JWST has changed the speed of discovery, for better or for worse - Astronomers are working at a furious pace to analyze and ...
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How can we make sure that it is physically the same source when we do cross matching?
When we go through multiple astronomy catalogs, we often do Cross-matching. We compare the position parameters $(\alpha, \delta)$ of different sources (galaxies, quasars, etc.) in the equatorial ...
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What determines how accurate a particular method is at finding the period between Lomb-Scargle and String Length Minimization?
I've been using the Lomb-Scargle and String Length Minimization methods to find the periods of various astronomical objects with unevenly spaced data. I wanted to see if I could find any patterns ...
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Database for distant stars
I'm looking for a database of stars that lists as many of the known stars as possible. Ideally, I'd like it to have information on the radius of the stars, the distance from the earth and the ...
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How does one convert between Modified Julian Date (MJD) and a standard (mm/dd/yr, hr:mm:ss)
I looked online and couldn't see an actual formula or anything, so I figured I'd ask here.
If I had an MJD like the following: 59145.6678
How would I convert that to a month, day, and year with the ...
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Where to get MOST data?
Where to get MOST data (light curves), please? Does a database or a list of objects that were exist? I mean MOST spacecraft.
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What Simple and Multiple Linear and Logistic Regressions Would Be Valuable for a Celestial Mechanical Data Set for Exoplanets with Density?
I have created a celestial mechanical data set for exoplanets with density values (https://github.com/tslever/Tom_Levers_Git_Repository/blob/main/UVA/2--Linear_Models_For_Data_Science/Project_2/...
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Tables or software for some astronomical data
Recently I saw a beautiful (but not rare) phenomenon - Jupiter was "directly above" the Moon, that is, they had the same azimuth and a small difference in altitude.
I would like to see on ...
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Other than Lomb-Scargle Periodograms and String Length Minimization, what other methods can be used to find the period of unevenly spaced data?
I'm doing some research into how different methods of finding the period with unevenly spaced data compare with each other. So far, I've looked at the Lomb-Scargle and String-Length Minimization. I ...
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What 1° x 1° region is the optically darkest patch in the sky?
What 1° x 1° region of the night sky has the lowest flux of light?
(considering the typical visual/luminance filter range, approximations using other filters/bands are acceptable, but should be in the ...
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How do I get temperature and diameter from a light curve?
I recently learned that short-period pulsating stars vary in diameter and temperature when they pulsate. If I have a light curve for such an object, is it possible to calculate its diameter and ...
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What does a fitted curve for the period of a variable star, tell me about the star?
If I have enough data of a variable star to make a light curve for it's whole period, and If I fit a function to that light curve, can that fitted function tell me anything about the properties of ...
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How do cross-matching algorithms deal with unequal-sized catalogues?
Let's say I'm using a service like TOPCAT or Vizier's cross-matching service and I'm trying to match the RA and dec of the sources in Catalogue 1, with 100,000 sources, to those in Catalogue 2, with a ...
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SDSS and DESI - How much variation in sky location?
I am trying to cross match a catalog derived from SDSS-MaNGA(self) with a catalog derived from DESI (Yang+2021). I am using TOPCATs Sky Algorithm, based on RA and Dec similarities to perform the ...
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