From RHESSI Wiki
Welcome to the RHESSI Science Nuggets: science notes from RHESSI. The following is a time-ordered list of the latest Nuggets added to the wiki. An alphabetical list of wiki Nuggets is also available. If you are looking for older Nuggets than please visit the original series of RHESSI Science Nuggets and use the search facilities there; for this new series of Nuggets in the Wiki format, use your browser's search facility for title words or authors.
We welcome volunteer authors - please see our page of help for authors.
| 237
| Balmer Continuum Observed by IRIS!
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| 29 September 2014 by Petr Heinzel Lucia Kleint
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| For the first time we have clear and direct observations of the Balmer continuum, from space. Click the title to read more.
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| 234
| RHESSI Resumes Observations
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| 1 September 2014 by Albert Shih and Säm Krucker
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| Back to normal, the anneal was a success. Click the title to read more.
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| 231
| Flare Observed by a Dozen Instruments
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| 28 July 2014 by Lucia Kleint and Kevin Reardon
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| A wonderful flare observed by a grand set of instruments, including IRIS and IBIS. Click the title to read more.
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| 229
| RHESSI is Annealing Now
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| 7 July2014 by Albert Shih and Martin Fivian
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| A fourth repair job for RHESSI, smoothing out radiation damage. Click the title to read more.
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| 223
| Homing in on Flare Energy
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| 14 April 2014 by Hugh Hudson and Ryan Milligan
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| Representing the spectral energy distribution of a flare. Click the title to read more.
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| 222
| Empirical Constructs and Cartoons
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| 24 March 2014 by Forrest Mozer and Hugh Hudson
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| How our mental images may relate to what's really going on. Click the title to read more.
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| 220
| A Wonderful Cycle 24 Flare
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| 3 March 2014 by Säm Krucker and Hugh Hudson
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| There have been quite a few Cycle 24 X-class flares, and this was one of the nicest. Click the title to read more.
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| 217
| Reflection of Coronal Global Waves
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| 13 January 2014 by Ines Kienreich and Hugh Hudson
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| A homologous series of global coronal waves reflects at a coronal-hole boundary. Click the title to read more.
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| 216
| Flare Coronal Rain
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| 23 December 2013 by Hugh Hudson and Säm Krucker
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| Thermal collapse in flare loops seen in a wonderful new way. Click the title to read more.
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| 210
| Scattering Polarization in Solar Flares
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| 21 October 2013 by Jiři Štěpán and Petr Heinzel
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| Linear polarization produced by anisotropy, rather than particle-beam impact. Click the title to read more.
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| 209
| The Flare that Time Forgot
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| 13 October 2013 by Paulo Simöes and Hugh Hudson
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| A long-forgotten Masuda flare reappears. Click the title to read more.
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| 208
| The Post-Burst Increase
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| 30 September 2013 by Hugh Hudson
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| Tutorial on flare thermal sources seen in microwaves. Click the title to read more.
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| 207
| Peristaltic Shocks: a model
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| 16 September 2013 by Dana Longcope and Roger Scott
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| Reconciling reconnection with high preflare coronal densities. Click the title to read more.
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| 206
| Negative Microwave Bursts
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| 3 September 2013 by Victor Grechnev and Hugh Hudson
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| Negative microwave bursts happen, in association with flares and "Hyder flares," and modern instrumentation makes them very interesting again. Click the title to read more.
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| 205
| Acceleration-region Densities
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| 6 August 2013 by Säm Krucker and Marina Battaglia
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| Independent constraints on the densities of ions and non-thermal electrons reveal bulk acceleration. Click the title to read more.
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| 204
| Implosion and Oscillation
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| 29 July 2013 by Paulo Simões and Hugh Hudson
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| The flare implosion originates in the lower atmosphere and involves GOES soft X-rays. Click the title to read more.
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| 203
| Minoflares
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| 1 July 2013 by Iain Hannah and Hugh Hudson
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| Earmarks of widespread energetic events in the solar atmosphere. Click the title to read more.
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| 202
| Mars Odyssey/HEND and RHESSI
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| 9 June 2013 by Vadim Vybornov and Michael A. Livshits
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| An event from far behind the solar limb, observed at Mars. Click the title to read more.
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| 201
| Hard X-rays in Descent
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| 27 May 2013 by Aidan O'Flannagain, John Brown and Peter Gallagher
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| A novel test of the thick-target model. Click the title to read more.
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| 200
| Too few? Too many?
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| 13 May 2013 by Paulo Simões and Eduard Kontar
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| Too few electrons in the footpoints; too many electrons in the corona. Click the title to read more.
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| 199
| A huge gamma-ray burst
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| 6 May 2013 by David Smith and André Csillaghy
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| A wonderfully bright gamma-ray burst at Z = 0.34. Click the title to read more.
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| 197
| Antipodal Flares
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| 1 April 2013 by B. Pecos and B. Paul
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| Flares on a solar diameter suggest a new subatomic particle. Click the title to read more.
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| 195
| Burst-on-Tail (BOT)
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| 4 March 2013 by Alex Struminsky and Ivan Zimovets
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| A "Burst-on-Tail" (BOT) phenomenon. Click the title to read more.
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| 193
| Passages of Electron Beams
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| 11 February 2013 by Bin Chen and Tim Bastian
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| New VLA capability for imaging spectroscopy shows several remarkable features of type III bursts. Click the title to read more.
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| 192
| Kappa Distribution
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| 21 January 2013 by Mitsuo Oka
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| A simpler function fits both thermal and nonthermal RHESSI spectral ranges. Click the title to read more.
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| 190
| Flare Productivity
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| 27 December 2012 by Hugh Hudson and Lyndsay Fletcher
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| An anomalous change in flare productivity per active region. Click the title to read more.
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| 189
| FOXSI Success
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| 27 December 2012 by Lindsay Glesener and Säm Krucker
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| The FOXSI rocket soars, and a flare occurs on schedule. Click the title to read more.
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| 188
| "Impulse Response Flares" and Gamma Rays
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| 13 November 2012 by Stephen White and Hugh Hudson
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| A simplifying paradigm may describe acceleration to the highest energies in flares. Click the title to read more.
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| 186
| Photospheric Temperature Gradient
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| 22 October 2012 by Martin Fivian and Hugh Hudson
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| RHESSI observes the photosphere with exquisite precision. Click the title to read more.
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| 184
| New TGFs Found in the RHESSI Data
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| 10 September 2012 by Thomas Gjesteland and Nikolai Østgaard
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| RHESSI sees many, many gamma-ray flashes from lightning. Click the title to read more.
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| 183
| The RHESSI Flare Catalog
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| 29 August 2012 by Jim McTiernan and Hugh Hudson
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| The Catalog is a powerful and easy-to-use access tool for the RHESSI flare observations. Click the title to read more.
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| 182
| RHESSI Catches Gamma-Ray Bursts
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| 15 August 2012 by Jakub Ripa
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| RHESSI catches gamma-ray bursts, and they come in three flavors. Click the title to read more.
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| 181
| Dense Loop Flares
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| 6 August 2012 by Jingnan Guo and Gordon Emslie
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| Direct electron mapping teaches us about the structure of electron acceleration in flares. Click the title to read more.
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| 180
| The Slowest Flare
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| 23 July 2012 by Sam Freeland and Hugh Hudson
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| A flare with an exceptionally slow rise phase, more than 5 hours in GOES 1-8 A soft X-rays. Click the title to read more.
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| 179
| Dimmings and Sustained Gamma-Ray Events
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| 25 June 2012 by Hugh Hudson and Nicola Omodei
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| Coronal disruptions reveal themselves as depletions and gamma-ray emissions. Click the title to read more.
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| 178
| Flare Nimbus
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| 14 June 2012 by Susan McKenna-Lawlor
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| The Flare Nimbus, its history and significance. Click the title to read more.
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| 174
| A Shocking Type II
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| 30 April 2012 by Hazel Bain, Säm Krucker and Lyndsay Glesener
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| The properties of global coronal waves sorted out. Click the title to read more.
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| 173
| RHESSI and IRIS
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| 16 April 2012 by Hugh Hudson
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| Flare gold at the foot of the rainbow. Click the title to read more.
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| 172
| A New Day Dawns
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| 26 March 2012 by Dale Gary
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| Soon, true microwave imaging spectroscopy. Click the title to read more.
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| 171
| An Fe Cascade
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| 12 March 2012 by Hugh Hudson
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| Iron everywhere in the EVE spectra. Click the title to read more.
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| 169
| RHESSI's Tenth Anniversary
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| 15 February 2012 by B. Dennis and R. Lin
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| On RHESSI's tenth, a top-ten discovery list. Click the title to read more.
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| 168
| Supra-Arcade Downflows
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| 23 January 2012 by S. Savage and D. McKenzie
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| A re-interpretation of the famous SAD tadpoles. Click the title to read more.
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| 166
| No Hard X-rays from Comet Lovejoy
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| 19 December 2011 by H. Hudson and P. Saint-Hilaire
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| An amazing sungrazing comet, but not detectable at high energies. Click the title to read more.
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| 163
| X-ray and H-alpha Flare Impulses
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| 14 November 2011 by K. Radziszewski and P. Rudawy
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| Strikingly precise correlations of H-alpha kernels and hard X-ray bursts. Click the title to read more.
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| 160
| A Flare in 3D
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| 10 October 2011 by Hugh Hudson and Juan Carlos Martinez Oliveros
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| Solar astrometry in 3D. Click the title to read more.
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| 159
| Solar Max Arrives
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| 28 September 2011 by Hugh Hudson and Richard Schwartz
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| Seven X-class flares already in 2011. Click the title to read more.
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| 155
| Hard X-rays and Sympathy
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| 13 July 2011 by Hugh Hudson
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| A hard X-ray spike elicits a sympathetic response. Click the title to read more.
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| 154
| Suzaku Microflares
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| 30 June 2011 by S. Ishikawa
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| Microflares too have powerful particle acceleration. Click the title to read more.
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| 153
| Acceleration without Heating
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| 13 June 2011 by G. Fleishman & E. Kontar
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| Strong hard X-rays and weak soft X-rays - breaking the paradigm?. Click the title to read more.
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| 151
| EVE/ESP and the Neupert Effect
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| 9 May 2011 by H. Hudson
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| The Neupert Effect works, sort of, in a limb gamma-ray flare. Click the title to read more.
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| 146
| M is for Magnifique Part Deux
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| 22 February 2011 by Steven Christe and Andrew Inglis
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| A type II radio burst but no CME and introducing a new way to search for waves in SDO. (CORRECTION There is a CME!). Click the title to read more.
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| 145
| At last, the EUV Spectrum
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| 8 February 2011 by Hugh Hudson
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| The main flare radiated energy is not in the EUV. Click the title to read more.
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| 144
| Black and White Flares
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| 24 January 2011 by Juan Carlos Martinez Oliveros and Charles Lindsey
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| HMI sees a black-light flare (?). Click the title to read more.
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| 142
| Brilliant Timing
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| 20 December 2010 by Säm Krucker and Hugh Hudson
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| Hinode and RHESSI observations strain the credibility of the thick-target model. Click the title to read more.
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| 141
| M is for Magnifique
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| 6 December 2010 by Steven Christe and Andrew Inglis
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| RHESSI and SDO see a remarkable flare. Click the title to read more.
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{{Nugget Badge
|title = Major Flare Watch Evaluation
|number = 140
|first_author = Dick
