Glasgow Callisto and CMEless type II bursts
From RHESSI Wiki
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[[File:oct21_wb.png|600px|thumb|center|alt=Light curves| Figure 2: | [[File:oct21_wb.png|600px|thumb|center|alt=Light curves| Figure 2: | ||
CALLISTO light curve at 55MHz, and time derivative of GOES soft X-ray light curve]] | CALLISTO light curve at 55MHz, and time derivative of GOES soft X-ray light curve]] | ||
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+ | [[File:oct21_stretched.png|600px|thumb|center|alt=Light curves| Figure 3: | ||
+ | CALLISTO spectrograph, stretched to bring out Type II emission, including cute harmonic. ]] | ||
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== Type II bursts without CMEs? == | == Type II bursts without CMEs? == | ||
Revision as of 16:31, 13 February 2015
Nugget | |
---|---|
Number: | 246 |
1st Author: | Peter Wakeford |
2nd Author: | Hugh Hudson |
Published: | February 16, 2015 |
Next Nugget: | TBD |
Previous Nugget: | [1] |
List all |
Contents |
Introduction
In the conventional picture, a [CME] drives a coronal shock wave that produces a [type II ("slow drift")] radio burst, which then accelerates solar energetic particles [SEPs]. In an earlier Nugget we noted the development of [NOAA] active region 2192, in October 2014; this region produced a remarkable series of major flares but few CMEs and no SEPs. We were thus quite surprised to find that our Glasgow Callisto radio observatory had actually detected type II bursts from some of these flares.
e-Callisto and Glasgow Callisto
The e-Callisto project is a global development of solar radio spectrometers scattered widely around the world, organized brilliantly from Switzerland by Christian Monstein. By providing an inexpensive and easily maintained receiver, this project rather brilliantly provides full-time broad-band monitoring of solar radio bursts.
[more text and a couple of figures]
Type II bursts without CMEs?
[some solar physics. Just checking I can edit the wiki]
Conclusions
Live data from the Glasgow CALLISO can be seen here, and back data can be downloaded by following the links. CALLISTO data can be analysed using IDL routines, or using the nice new Python package SunPy. [some text. Virtues of e-callisto; failure of Irish site to confirm. ]
References
RHESSI Nugget Date | 16 February 2015 + |
RHESSI Nugget First Author | Peter Wakeford + |
RHESSI Nugget Index | 246 + |
RHESSI Nugget Second Author | Hugh Hudson + |