counting sunspots
DESCRIPTION
Counting Sunspots. Leif Svalgaard Project ASTRO Aug. 3, 2013. What We are Going to Cover Today. How to find Sunspot Drawings on the Internet How to Count Groups and Spots How to Construct Your Own Sunspot Catalog Making Graphs Historical View Questions & Answers - PowerPoint PPT PresentationTRANSCRIPT
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Counting Sunspots
Leif SvalgaardProject ASTRO
Aug. 3, 2013
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What We are Going to Cover Today
• How to find Sunspot Drawings on the Internet
• How to Count Groups and Spots
• How to Construct Your Own Sunspot Catalog
• Making Graphs
• Historical View
• Questions & Answers
• Looking Through a Real [Modern] Telescope
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Sunspot Drawings from Locarnohttp://www.specola.ch/e/drawings.html
Locarno, Switzerland
Click there
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Sunspot Drawings from Locarno
Click
Click
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This is the drawing
Click to see a larger version
Get to know his handwriting…
Groups Spots Class Latitude
R = 10*g + f = 50+28 = 78
R Wolf = 0.6 * R = 51
Marco
2
7
1
1
2
13
6
Kanzelhöhe
Locarno
Kanzelhöhe
7
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Mt. Wilson
25 Jul
6
63
69
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SDO/HMI
2013-Jul-26
WELocarno
SDO/HMI
Mt. Wilson
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Enter your Estimates into a Table
SIDC [Solar Influences Data Analysis Center] is the Official Keeper of the International Sunspot Number. They produce daily [preliminary], monthly, and yearly reports and is the definitive source for Sunspot Numbers http://sidc.be/
Recall the ‘raw’ Relative Sunspot Number Definition: R = 10*groups + spots
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Here is a chart I maintain daily
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Counting Sunspots Only Becomes Real
Fun When You Make a Graph
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20
40
60
80
100
120
140
160
180
200
2013.500 2013.510 2013.520 2013.530 2013.540 2013.550 2013.560 2013.570
Sunspot Numbers for July 2013
LOC
SIDC
Leif NOAA
Rudolf Wolf Alfred Wolfer
http://spaceweather.com/
You can get the NOAA sunspot number daily from
It does not have the 0.6 k-factor
0.6
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And of Great Science Value When Graphed over Many Years (Centuries)
2009.0
Now
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Useful and Interesting Websites
• http://sidc.be/products/meu/ • http://www.specola.ch/e/drawings.html • http://cesar.kso.ac.at/sunspot_drawings/ • ftp://howard.astro.ucla.edu/pub/obs/drawings • http://www.swpc.noaa.gov/ftpdir/indices/quar_DSD.txt • http://spaceweather.com/ • http://www.leif.org/research/ • http://www.swpc.noaa.gov/alerts/solar_indices.html• http://hirweb.nict.go.jp/sedoss/solact3 • http://wso.stanford.edu/