All Questions
Tagged with light-curve data-analysis
12
questions
2
votes
0
answers
27
views
Using data from the Fine Guidance System (HST)
Has anyone been able to successfully use data from the Hubble Space Telescope's fine guidance system in order to create light curves?
I found a bunch of older papers that reference this instrument, ...
1
vote
0
answers
42
views
plotting light curve for x ray data
how can I plot the light curve for Chandra X-ray data? I want to extract the counts within the specified energy range from the light curve.
e.g., I have to extract the counts within the energy range ...
- 51
2
votes
0
answers
67
views
Finding the uncertainty in period for String-Length Minimization calculation
I wrote a Python script that calculates the period of an unevenly sampled data set using the String-Length Minimization method.
You can read about that method here: A period-finding method for sparse ...
- 333
2
votes
1
answer
377
views
How does one actually fold a light curve?
I'm studying the variable stars (periodic variables with brightness changes repeating over time), and to examine the shape of the light curve it is useful to fold the data points at this period and ...
- 49
2
votes
2
answers
90
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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 ...
- 333
4
votes
1
answer
385
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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 ...
- 333
2
votes
1
answer
57
views
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 ...
- 333
2
votes
1
answer
2k
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How do I phase fold the light curve for a variable star?
I have some observational data for a star where I've done aperture photometry to get a partial period. I understand that you need to use other techniques to estimate a period for stars whose period is ...
- 333
5
votes
1
answer
140
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How do you tell if a variable star is periodic or not by its light curve?
I have light curves for a particular star. I'm able to construct a periodogram of the stars' light curve, a plot of the power of the light curve vs. the signal's period. For a nonperiodic but ...
- 65
2
votes
0
answers
93
views
Depth of primary and secondary minimum in a light curve
How can I explain approximately the same depth of primary and secondary minimum in light curve?
I observe star HD 36486. I tried filters MOST and BRITE.
Is it related with photometric filter? When ...
- 141
1
vote
0
answers
43
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How to decide which part of the data is analyzed? [closed]
I need to get the X-ray light curve of Classical Nova V1494 Aquilae (1999 No. 2) in Outburst. It is done long time ago, but I need to this by myself. While reading the papaer about the V1494 Aquilae, ...
- 11
5
votes
1
answer
182
views
What caused instant jumps and exactly flat periods in Kepler's light curves?
Last 65 days of Kepler's light curve for the infamous KIC 8462852 star is shown below from the published paper's graph. Skip the dips here, I wonder about two other features:
Day 1559, during a ...
- 11.4k