All Questions
Tagged with photometry variable-star
7 questions
2
votes
1
answer
465
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
0
answers
55
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Spurious periods of stars
What exactly is meant by spurious periods of stars? E. Tanner writes in Spurious Periods in Spectroscopic Binaries in 1948
Furthermore: Can spurious periods be produced by aliasing, and how can they ...
- 311
3
votes
2
answers
104
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Calibrating raw photometric measurements
So I have a photometry data sourced from Solar Mass Ejection Imager's (SMEI) server as an ‘add-on data’ for my point source of interest (a variable star) with a 104 minute cadence. However, it’s not ...
- 105
3
votes
2
answers
85
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Delta Velorum - non-observed variable star
I am a beginner variable star observer from the Southern Hemisphere (but with experience in astronomy) and, when I was looking for VS to observe, I saw that Del Vel has almost no observations. Thus, ...
- 153
10
votes
1
answer
201
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Color index B-V of the dimming Betelgeuse
Using AAVSO light curve generator I have plotted V and B magnitudes of Betelgeuse in the past 150 days to see trend of B-V color index. If dust would be the cause of the recent drop in the star ...
- 1,074
7
votes
1
answer
338
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Did the late 2019 "fainting" of Betelgeuse show any spectral trends that differ from it's normal variability?
update: (August 2020) With all the newest news about including what the Dr. Becky video discusses as linked in How do magnetic fields mess with astronomers' observations? I'll bet this question ...
- 30.7k
1
vote
0
answers
137
views
Why do these photometric observations of Betelgeuse look "quantized" in 0.1 magnitude steps?
The most interesting question related to this Will Kinney tweet would be what's going on with Betelgeuse? but I can't help but wonder why much but not all of the photometric data is clustered in ...
- 30.7k