RHESSI_data_analysis

rhessi_data_analysis@solar.physics.montana.edu

32 discussions

2018 AGU Fall Meeting Session SH008 -- High-Energy Solar Investigations Through Next-Generation Spectroscopy: X-rays, Gamma-rays, and EUV -- Call for Abstracts
by Amir Caspi 25 Jul '18

25 Jul '18

Dear colleagues, You are cordially invited to submit abstracts to Session SH008 ³High-Energy Solar Investigations Through Next-Generation Spectroscopy: X-rays, Gamma-rays, and EUV,² for the 2018 AGU Fall Meeting, to be held in Washington, DC, 10 14 December 2018. Spectrally resolved measurements in X-rays, gamma-rays, and EUV are critical for advancing our understanding of energetic phenomena on the Sun, during both flares and quiescence. To that end, this session invites presentations covering new instrumentation, enabling technology, missions, and mission concepts for next-generation X-ray, gamma-ray, and EUV solar spectroscopy, including spatially-resolved measurements, and the science that would be enabled by such new observations. The full session description and abstract submission are here: https://agu.confex.com/agu/fm18/prelim.cgi/Session/52561 The deadline to submit an abstract is Wednesday, 1 Aug 2018, at 23:59 EDT. We welcome your submissions to this exciting session! --- Amir Caspi, Lindsay Glesener, and Amy Winebarger

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RHESSI 16th / MinXSS 1st Workshop: Deadline April 22!
by Amir Caspi 14 Apr '17

14 Apr '17

Dear solar X-ray colleagues, REMINDER: the deadline to register and submit abstracts is April 22, in just one week! I heartily encourage and invite you to attend this joint meeting. Registration and abstract submission are NOW OPEN for the RHESSI 16th Workshop, co-hosted with the MinXSS 1st Workshop, to be held at the University of Colorado in Boulder, CO, USA from June 19 to 24, 2017. The workshop website, https://rhessi16.boulder.swri.edu, includes registration and abstract information, as well as logistical (travel, hotels, etc.) information. Anyone with an interest in high-energy solar physics is invited to attend. Registration and abstracts are due April 22. The registration fee of $325 includes the entire week of the workshop. There is no separate abstract fee. The Welcome Reception, Banquet dinner, and all morning and afternoon coffee breaks are free to registered attendees. Companion tickets are available. Specially-priced room blocks are available at selected Boulder hotels until May 18. The workshop format will be a blend of plenaries at the beginning and end, with various topical working group sessions in between, covering a range of high-energy solar physics topics including acceleration and transport of electrons and ions, the solar atmospheric response to energy release (including thermal plasma), multi-wavelength observations (EUV, radio, etc.), and pertinent theory. There will also be sessions on next steps in RHESSI imaging; the MinXSS CubeSat status and data access; new results from MinXSS-1 on flare thermal emission and quiescent soft X-ray emission; and a discussion of future instrumentation. The final science program will be determined based on your contributed abstracts, so please submit a presentation and help guide the scientific goals of this event. Please feel free to contact me directly if you have any questions about the workshop. We look forward to seeing you all in Boulder this June! On behalf of the Local Organizing Committee, --- Amir, LOC chair amir(a)boulder.swri.edu +1-303-546-6351

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RHESSI 16th / MinXSS 1st Workshop: Registration open!
by Amir Caspi 31 Mar '17

31 Mar '17

Dear solar X-ray colleagues, Registration is NOW OPEN for the RHESSI 16th Workshop, co-hosted with the MinXSS 1st Workshop! I invite and encourage you to attend this joint meeting. The workshop will be held at the University of Colorado in Boulder, CO, USA from June 19 to 24, 2017. The website is at https://rhessi16.boulder.swri.edu, and includes registration and abstract information, as well as logistical (travel, hotels, etc.) information. Registration and abstracts are due April 22. The registration fee of $325 includes the entire week of the workshop. The Welcome Reception, Banquet dinner, and all morning and afternoon coffee breaks are free to registered attendees. Companion tickets are available. Specially-priced room blocks are available at selected hotels until May 18. As with prior RHESSI workshops, the format will be a blend of plenaries at the beginning and end, with various topical working group sessions in between, covering a range of high-energy solar physics topics including acceleration and transport of electrons and ions, the solar atmospheric response to energy release (including thermal plasma), multi-wavelength observations (EUV, radio, etc.), and pertinent theory. There will also be sessions on next steps in RHESSI imaging; the MinXSS CubeSat status and data access; new results from MinXSS-1 on flare thermal emission and quiescent soft X-ray emission; and a discussion of future instrumentation. The final science program will be determined based on your contributed abstracts, so please submit a presentation and help guide the scientific goals of this event. Please feel free to contact me directly if you have any questions about the workshop. I look forward to seeing you all in Boulder in June! On behalf of the Local Organizing Committee, --- Amir, LOC chair amir(a)boulder.swri.edu +1-303-546-6351

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RHESSI software changes
by Tolbert, Kim 03 Mar '17

03 Mar '17

Dear RHESSI software users, On Friday, March 3, we put some new RHESSI data accumulation software online in the SSW hessi atest directory. For the most part, the changes should be transparent to almost every user. The main changes are * Since January 2014, electronic errors in the detectors moved some events to energies up to 100-150 keV higher than their actual energy. These events are now identified and removed. This effect was getting worse with time. If you found higher energy emission than expected, you should look again with this new software. * Livetime accumulations at very small time bins (<512 binary microseconds) were not being reported correctly. Fine time bins of that order are generally only necessary for real spatial structure on the order of a few arcseconds. If you were imaging sources far from the spin axis with Grid 1 this might have affected your results. * Accumulations across packet bunch boundaries were occasionally problematic. (The software can't process the full data request at once - it reads and processes groups or bunches of packets sequentially to accomplish that.) The effect was minor - an extremely short time interval of incorrect data at the boundary. Packet boundaries are now handled correctly. More detail is provided at this link https://hesperia.gsfc.nasa.gov/ssw/hessi/doc/software/changes/sw_3-mar-2017… (the full software change history is here: https://hesperia.gsfc.nasa.gov/ssw/hessi/doc/software/changes/sw_changes.ht…) Richard and Kim

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RHESSI Senior Review Proposal
by Dennis, Brian R. (GSFC-6710) 02 Mar '17

02 Mar '17

The RHESSI Senior Review Proposal submitted last week is now on line at the following location: https://hesperia.gsfc.nasa.gov/rhessi3/mission/documents/ Thanks to everybody who contributed to it. The presentation to the Senior Review Committee will be on Tuesday, April 11. Best wishes, Brian Dennis Brian R. Dennis Solar Physics Laboratory, Code 671 Goddard Space Flight Center Greenbelt, MD 20771 301-286-7983 brian.r.dennis(a)nasa.gov

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2016 AGU Fall Meeting Session SH011 -- New Observations and Recent Results for Solar X-ray Spectral Measurements and their Applications for Earth's Atmosphere -- Call for Abstracts
by Amir Caspi 29 Jul '16

29 Jul '16

Dear Colleagues, We cordially invite you to submit a contributed abstract for the Fall AGU 2016 meeting, session SH011, “New Observations and Recent Results for Solar X-ray Spectral Measurements and their Applications for Earth’s Atmosphere.” This session is inspired by recent and upcoming missions to measure the critically under-observed ~0.2-5 keV (~0.25-6 nm) spectral range, including the Miniature X-ray Solar Spectrometer (MinXSS) CubeSat; the session includes hard X-rays, and is not limited to just the soft X-ray range. We invite presentations discussing spectrally-resolved solar X-ray measurements (including spectroscopy and imaging, both soft and hard X-rays), new techniques, and instrumentation; their implications for studies of plasma heating and particle acceleration in the flaring and quiescent corona; and their influence on Earth’s upper atmosphere. The full session description, and a link to submit an abstract, can be found here: https://agu.confex.com/agu/fm16/preliminaryview.cgi/Session13377 The deadline to submit an abstract is 3 August 2016. We look forward to your submissions! Conveners: Amir Caspi (SwRI), Tom Woods (CU/LASP) --- Amir

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IRIS-4 Workshop in May
by Dennis, Brian R. (GSFC-6710) 06 Feb '15

06 Feb '15

IRIS-4 workshop Dates: May 18-22, 2015 Location: Boulder, CO Web Site: www2.hao.ucar.edu/iris-4-workshop<HTTPS://www2.hao.ucar.edu/iris-4-workshop> Program: · Talks and posters · Tutorials on IRIS data analysis and related topics such as optically thick radiative transfer Abstract/early registration deadline: March 6 Adrian N. Daw IRIS Mission Scientist NASA/GSFC Solar Physics Lab Adrian.Daw(a)nasa.gov<mailto:Adrian.Daw@nasa.gov> office: 301-286-2278

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Using Fermi Solar Flare Data
by Dennis, Brian R. (GSFC-6710) 15 Nov '13

15 Nov '13

I am asking for your help in assessing the value of our Fermi Guest investigator project to make the Fermi GBM and LAT data readily available to the solar physics community. We are writing a follow-on proposal to continue this project, and it will be important to show how widely the Fermi solar observations are being used, and how useful the capabilities are that we are providing to access and analyze the data. Please let me know of any use you are making of Fermi X-ray and gamma-ray observations of solar flares. Are you using or are you planning to use any of the solar-specific access and analysis tools we have provided? Here is a short description of them: * Fermi solar flare page at http://hesperia.gsfc.nasa.gov/fermi_solar/ * Fermi GBM Flare List at http://hesperia.gsfc.nasa.gov/fermi/gbm/qlook/fermi_gbm_flare_list.txt * Quick-look count-rate light curves for both the Gamma-ray Burst Monitor (GBM) NaI and BGO detectors available on the RHESSI Browser at http://sprg.ssl.berkeley.edu/~tohban/browser/?show=grth1+qlpcr+gbmd+gbmo&da… * LAT quick-look time lines available on the RHESSI Browser coming soon. * Spectral analysis of GBM data in OSPEX * Spectral analysis of LAT data in OSPEX coming soon If you have been accessing and using Fermi data, even if it is just looking at the time lines on the RHESSI Browser, please drop me a line. Let me know how you access the data, how you have used them, and what you think of our web site and the ease of access and data analysis. Also, please include references to any use or mention of Fermi data in a presentation or publication. Thanks for your help, Brian Brian R. Dennis Solar Physics Laboratory, Code 671 Goddard Space Flight Center Greenbelt, MD 20771 301-286-7983 brian.r.dennis(a)nasa.gov

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Ken Frost, Tragic News
by Dennis, Brian R. (GSFC-6710) 19 Aug '13

19 Aug '13

Ken Frost passed away on August 5. An obituary and information about services can be found here: http://www.lastingtributesfuneralcare.com/obituaries/Kenneth-Frost3/#!/Obit… Brian R. Dennis Solar Physics Laboratory, Code 671 Heliophysics Science Division NASA Goddard Space Flight Center Greenbelt, MD 20771-0001 301-286-78983 brian.r.dennis(a)nasa.gov<mailto:brian.r.dennis@nasa.gov> brdennis(a)comcast.net<mailto:brdennis@comcast.net> http://hesperia.gsfc.nasa.gov/~dennis/

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Regularized Electron Flux Visibility Mapping in RHESSI software
by Kim Tolbert 26 Nov '12

26 Nov '12

The RHESSI software team is happy to announce the formal inclusion of regularized electron flux visibilities within the main branch of the hessi software tree distributed through SSW. This gives a user the capability of making electron flux maps over a series of energies by setting only a minimum of parameters and using any of our visibility imaging methods. It is also possible to use these methods to create photon maps using these electron visibilities which will be more smoothly varying than by making maps in the normal way from single energy bands. As this is within our standard object software these methods are available both from the Command Line and Graphical User Interface (CLI and GUI). These are currently the only imaging methods we use that constrain the map at a single energy by the data at multiple energies. Please see our "RHESSI Data Analysis Software Change History <http://hesperia.gsfc.nasa.gov/ssw/hessi/doc/software/changes/sw_changes>" and "Using Visibility Objects in the RHESSI Software <http://hesperia.gsfc.nasa.gov/ssw/hessi/doc/image/hsi_visibility_howto.html>" for more details. Richard Schwartz

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RHESSI_data_analysis