Presentations, Reports, Data Files

Presentations

LYRA

• LYRA Tests and Calibration
  (LYRA Meeting, Davos, 05-06 Oct 2006)
• LYRA Tests and Selections
  LYRA Response and Calibration
  (SCSL2 Meeting, Bern, 29 Nov - 01 Dec 2006)
• LYRA Detectors: Configuration and Tests
  LYRA Detectors: Response and Calibration
  (GSP Meeting, Brussels, 09 Jan 2007, not presented)
• LYRA Calibration: Ongoing Efforts and Problems
  (SCSL3 Meeting, Bern, 18-19 Apr 2007)
• LYRA Calibration
  (DRB Meeting, ESTEC, 15 Jun 2007, not presented)
• Current Developments in LYRA Calibration
  (SCSL4 Meeting, Brussels, 05 Nov 2007)
• Upcoming LYRA Science Data Products
  (Poster for ESWW5, Brussels, Nov 2008)
• LYRA Science Data Products Forthcoming
  (Poster for SOHO22, Bournemouth, Apr 2009)
• More PROBA2 Science Data Products
  (Poster for ESWW6, Brugge, Nov 2009)
• LYRA Calibration, Data Products, and FITS Files
  (LYRA SWT/CESRA, La Roche, Jun 2010)
• First Results from the LYRA Solar UV Radiometer
  (COSPAR/TIGER, Bremen, Jul 2010)
• Solar Irradiance Observations with LYRA on PROBA2
  (10th Astrophysical Colloquium, Hvar/Croatia, 10 Sep 2010)
• LYRA data: getting them and exploiting them
  (Soteria CBW, ROB/Brussels, 15 Feb 2011)
• Overview of LYRA Calibration up to now
  (SCSL/PROBA2 Science Meeting, ROB/Brussels, 18 Feb 2011)
• LYRA Calibration, Data Products, Plans
  (SCSL/PROBA2 Science Meeting, Sun360, Kiel/Germany, Jul 2011
• LYRA Calibration, Data Products, Cross-Calibration
  (EUV Irradiance Workshop, LASP, Boulder/Colorado, Oct 2011)
• Components of soft x-ray and extreme ultraviolet in flares observed by LYRA on PROBA2 (I) | (II)
  (Poster for ESWW8, Namur, Nov 2011)
• Components of soft x-ray and extreme ultraviolet in flares observed by LYRA on PROBA2
  (SCSL/PROBA2 Splinter, ESWW8, Namur, Nov 2011)
• Degradation of LYRA on PROBA2 after two years inorbit
  (STCE Workshop, Brussels, May 2012)
• Thermal evolution of flares observed by PROBA2/LYRA
  (COSPAR/TIGER, Mysore/India, Jul 2012)
• Two years of solar observation with PROBA2/LYRA: An overview
  (12th Astrophysical Colloquium, Hvar/Croatia, Sep 2012)
• Space weather data and services at ROB/SIDC
  (Solar and Heliospheric Influences on the Geospace, Bucharest/Romania, Oct 2012)
• Flares observed by LYRA on PROBA2
  (Solar and Heliospheric Influences on the Geospace, Bucharest/Romania, Oct 2012)
• Correlation between sunspot numbers and EUV irradiance as observed by LYRA on PROBA2
  (Poster for ESWW9, Brussels, Nov 2012)
• LYRA calibration using TIMED and SORCE
  (Solar EUV Irradiance Working Group, Brussels, Apr 2013)
• LYRA calibration status
  (PROBA2 SWT Meeting, Brussels, Jun 2013)
• Correlation between sunspot data and EUV irradiance as observed by LYRA on PROBA2
  (ROB/SIDC Seminar, Brussels, Jul 2013)
• Correlation of solar flares with long-term irradiance and sunspot levels
  (Poster for ESWW10, Antwerp, Nov 2013)
• The LYRA radiometer onboard PROBA2 as a detector of solar flares
  (Poster for ESWW10, Antwerp, Nov 2013)
• Progress towards understanding the degradation and performance characteristics of the PROBA2-LYRA instrument
  (Poster for AGU Fall meeting, San Francisco, Dec 2013)
• Sonnenforschung und Weltraumwetter
  (Rotary Club, Cuxhaven/Germany, Feb 2014)
• Prediction of solar flares on the basis of correlation with long-term irradiance and sunspot levels
  (SIDC Seminar, Brussels, Mar 2014)
• LYRA calibration considering the evolution of dark currents
  (Solar EUV Irradiance Working Group, Brussels, Jun 2014)
• Long-term irradiance observation and short-term flare prediction with LYRA on PROBA2
  (COSPAR 40th Scientific Assembly, Moscow, Aug 2014)
• Space climate and space weather observations with PROBA2/LYRA
  (13th Astrophysical Colloquium, Hvar/Croatia, Sep 2014)
• Five Years of EUV solar irradiance evolution, from short to long timescales as observed by PROBA2/LYRA
  (ESWW11, Liege, Nov 2014)
• In situ detections of Space Weather by the LYRA radiometer on board the PROBA2 satellite
  (Poster for ESWW11, Liege, Nov 2014)
• Long-term variability of LYRA data
  (Solar Metrology Needs and Methods II, Brussels, Sep 2015)
• SOHO/SUMER - Results and lessons learned
  (EUI Consortium Meeting, Brussels, 26 Apr 2016)
• Rescaled PROBA2/LYRA data used as GOES X-ray flux proxy
  (XIVth Hvar Astrophysical Colloquium, Hvar/Croatia, 26-30 Sep 2016)
• Rescaled PROBA2/LYRA data used as GOES X-ray flux proxy
  (Poster for 13th European Space Weather Week, Oostende/Belgium, 14-18 Nov 2016)
• LYRA Mid-Term Periodicities
  (Poster for 13th European Space Weather Week, Oostende/Belgium, 14-18 Nov 2016)
• In situ detections of Space Weather by the LYRA radiometer on board the PROBA2 satellite
  (Poster for 13th European Space Weather Week, Oostende/Belgium, 14-18 Nov 2016)
• LYRA status update
  (Proba2 SWT meeting, 13th European Space Weather Week, Oostende/Belgium, 14-18 Nov 2016)
• Multi-instrument observations of an X9.3 flare
  (Poster for 14th European Space Weather Week, Oostende/Belgium, 27Nov-01Dec 2017)
• LYRA status update
  (Proba2 SWT meeting, 14th European Space Weather Week, Oostende/Belgium, 27Nov-01Dec 2017)
• PROBA2/LYRA soft x-ray response after ten years in space
  (Solar EUV Irradiance Workshop, STCE/ROB, Brussels/Belgium, 14-18 Oct 2019)
• PROBA2/LYRA soft x-ray response after ten years in space
  (Poster for 16th European Space Weather Week, Liege/Belgium, 18-22 Nov 2019)
• Monitoring space weather with PROBA2/LYRA after 12 years in space
  (Poster for 18th European Space Weather Week, Zagreb/Croatia, 24-28 Oct 2022)
• The performance of PROBA2/LYRA
  (Dep4 Seminar, Royal Observatory of Belgium, Brussels, 27 Sep 2023)
• Consequences of degradation corrections for PROBA2/LYRA
  (Dep4 Seminar, Royal Observatory of Belgium, Brussels, 02 Oct 2024)
• Development of solar activity as observed by PROBA2/LYRA
  (Poster for SDO Science Workshop, Boulder/Colorado, 17-21 Feb 2025)
• 15-year dataset to monitor solar activity
  (XVIII Hvar Astrophysical Colloquium, Hvar/Croatia, 18 Sep 2025)
• LYRA on PROBA2 - An Introduction
  (for Guest Investigators at ROB/Brussels)

SUMER

• Solar UV Spectroscopy with SUMER on SOHO
  Williams College 10 Jul 2007
• Solar UV Spectroscopy with SUMER on SOHO (extended)
  ROB Brussels 11 Oct 2007
• The Redshifted Footpoints of Coronal Loops
  Poster for SOHO20, Ghent, Aug 2007
• Transition Region Redshifts in Quiet Sun, Coronal Hole, and Active Region
  Poster for SOHO22, Bournemouth, Apr 2009

LYRA Reports

• LYRA Opto-Mechanical properties
  (Silvio Koller 06 Feb 2004)
• Flaechenmessung der LYRA-Blenden
  (C.Walther PMOD/WRC Apr-Jun 2005)
• LYRA Assembly FM Logbook
  (PMOD/WRC 27 Jul 2005)
• Calibration Report GI Beamline (1-30 nm) July 2005
  (Ali BenMoussa 07 Sep 2005)
• Calibration Report NI Beamline (40-240 nm) July 2005
  (Ali BenMoussa 01 Sep 2005)
• Davos Sun Measurements
  (PMOD/WRC 07 Apr 2006)
• Pre-analysis Report GI Beamline (1-30 nm) March 2006
  (Ali BenMoussa 09 May 2006)
• Pre-analysis Report NI Beamline (40-240 nm) March 2006
  (Ali BenMoussa 30 May 2006)
• LYRA Data Level Working Document
  (Matthieu Kretzschmar 04 Dec 2006)
• Description Voltage-to-Frequency Converter
  (Analog Devices Inc (c) 2000)
• LYRA Functional Tests Thermal Vacuum
  (Silvio Koller 29 Jun 2009)

• LYRA Data Processing: Data Levels
  (IED 16 Aug 2006)
• LYRA Flatfield Software: Relative Output as Function of Pointing
  (IED 17 Aug 2006, revised 26 Apr 2007)
• LYRA Radiometric Model Simulations: Report
  (IED 18 Aug 2006)
• LYRA Signal Stability: Report
  (IED 20 Sep 2006, revised 16 Nov 2006, revised 04 Dec 2006)
• LYRA Calibration Software: First Attempt | LYRA Calibration Software
  (IED 25 Oct 2006, revised 21 Sep 2007, merged into "Calibration Methods")
• LYRA Pulsed LED Tests: Data Analysis
  (IED 14 Feb 2007, revised 06 Mar 2007)
• LYRA Detectors Positions, Flatfields, Consequences
  (IED 20 Mar 2007, revised 21 Nov 2007, merged into "Responsivity Update")
• LYRA Noise Distribution: Report
  (IED 14 May 2007)
• LYRA Responsivity Measurements: BESSY NI March 2007 Updates
  (IED 03 Oct 2007, revised 16 Oct 2007, merged into "Responsivity Update")
• Spectra, Detector, and Filter Files used for LYRA Radiometric Model Simulations
  (IED 30 Nov 2007)
• LYRA Dark Current and LED Measurements
  (IED 14 Dec 2007)
• LYRA Responsivity: Update
  (IED 15 Jan 2008, in progress)
• LYRA Calibration Methods | LYRA Calibration Methods: New Spectra |
  LYRA Calibration Methods: New Channels
  (IED 07 Apr 2008, revised 18 Jul 2008, revised 16 Jun 2009)
• LYRA Output: Expected Variations | LYRA Output: Expected Variations (rev.) |
  LYRA Output: Expected Variations (Update) |
  (IED 16 Apr 2008, revised 21 Oct 2008, revised 30 Jul 2009)
• Linearity of LYRA Channels for Expected Solar Variations
  (IED 10 Jul 2008, in progress)
• Introduction to LYRA FITS Files, incl. 1 Example
  (IED 03 Aug 2009)
• LYRA Calibration: Risks and Chances, "Executive Summary"
  (IED 10 Aug 2009)
• LYRA - the first three months. Data analysis during the commissioning phase
  Part I | Part II
  (IED 26 Jan 2010)
• LYRA Dark Currents (Update) | LYRA Dark Currents above 50degC
  (IED 02 Dec 2010, revised 08 Feb 2011)
• LYRA Degradation Estimate: Update Dec2010 | Update May2011 | Update Dec2011
  (IED 03 Dec 2010, revised 19 May 2011, revised 20 Dec 2011)
• LYRA Calibration now based on First Light Day
  (IED 26 Feb 2011)
• Towards Cross-Calibration of SWAP, LYRA, TIMED/SEE, EVE
  IED 28 Jun 2011
• Separate SXR and EUV Contributions in LYRA Channels 3 and 4
  IED 09 Aug 2011, revised 18 Aug 2011
• Estimating GOES Flare Peaks from LYRA Data
  IED 22 Sep 2011
• LYRA Degradation Report: Update Dec 2012
  IED 18 Dec 2012
• Estimation of Degradation Curves for LYRA Unit 2
  IED 25 Apr 2013
• Correlation of flares with long-term irradiance and sunspot levels
  IED 24 May 2013
• Speculations about the "real" strength of Lyman-alpha flare signatures
  IED 07 Jun 2013
• Thermal-component analysis of flare series
  IED 01 Aug 2013
• Thermal-component analysis of two flares
  IED 05 Dec 2013
• LYRA status after 1500 days
  IED 06 Oct 2014
• Correction of occultation patterns based on tangential altitude
  IED 18 Dec 2014
• LYRA and the eclipse of 20 March 2015
  IED 24 Mar 2015
• "Cleaning" the early Lyman-alpha channel 2-1 from artefacts
  IED 11 May 2015
• Evolution of dark currents in LYRA detectors
  IED 07 Mar 2016
• Flare watch with all three LYRA units 29 Mar - 05 Apr 2017
  IED 06 Jul 2017
• Evolution of dark currents in LYRA detectors - Update
  IED 19 Jan 2018
• LYRA degradation status after ~3000 days
  IED 23 Feb 2018
• Evolution of dark currents in LYRA detectors - Update due to a new campaign
  IED 17 Aug 2018
• LYRA flare strengths over time
  IED 30 Jul 2019
• Evolution of dark currents in LYRA detectors - Update 2019/2020
  IED 04 Jun 2020
• LYRA degradation status after ~4000 days
  IED 24 Nov 2020
• Correction of occultation patterns - Update
  IED 16 Mar 2021
• Evolution of dark currents in LYRA detectors - Update 2021
  IED 11 May 2021
• Evolution of dark currents in LYRA detectors - Update 2022
  IED 02 May 2022
• LYRA degradation status after ~4500 days
  IED 07 Jul 2022 (see also Zagreb-Poster)
• Evolution of dark currents in LYRA detectors - Update 2023
  IED 03 Apr 2023
• LYRA degradation status after ~4800 days
  IED 02 Jun 2023
• Evolution of dark currents in LYRA detectors - Update 2024
  IED 21 Mar 2024
• LYRA degradation status - Update 2024
  IED 25 Apr 2024
• Evolution of dark currents in LYRA detectors - Update 2025
  IED 29 May 2025
• LYRA degradation status - Update 2025
  IED 13 Jun 2025

• Overall LYRA Calibration Report
  (First Approach, Status May 2007)
• Pre-flight Calibration of LYRA
  (First Outline, Status Feb 2008, in progress)

Data Files

• Responsivity Curve for LYRA Channel 1-1 (text)
• Responsivity Curve for LYRA Channel 1-2 (text)
• Responsivity Curve for LYRA Channel 1-3 (text)
• Responsivity Curve for LYRA Channel 1-4 (text)
• Responsivity Curve for LYRA Channel 2-1 (text)
• Responsivity Curve for LYRA Channel 2-2 (text)
• Responsivity Curve for LYRA Channel 2-3 (text)
• Responsivity Curve for LYRA Channel 2-4 (text)
• Responsivity Curve for LYRA Channel 3-1 (text)
• Responsivity Curve for LYRA Channel 3-2 (text)
• Responsivity Curve for LYRA Channel 3-3 (text)
• Responsivity Curve for LYRA Channel 3-4 (text)

• Updated Responsivity Curve for LYRA Channel 1-1 (text)
• Updated Responsivity Curve for LYRA Channel 1-2 (text)
• Updated Responsivity Curve for LYRA Channel 1-3 (text)
• Updated Responsivity Curve for LYRA Channel 1-4 (text)
• Updated Responsivity Curve for LYRA Channel 2-1 (text)
• Updated Responsivity Curve for LYRA Channel 2-2 (text)
• Updated Responsivity Curve for LYRA Channel 2-3 (text)
• Updated Responsivity Curve for LYRA Channel 2-4 (text)
• Updated Responsivity Curve for LYRA Channel 3-1 (text)
• Updated Responsivity Curve for LYRA Channel 3-2 (text)
• Updated Responsivity Curve for LYRA Channel 3-3 (text)
• Updated Responsivity Curve for LYRA Channel 3-4 (text)
• Explanation of Updates

• Example LYRA Lev1-met daily FITS file
• Example LYRA Lev1-std daily FITS file
• Example LYRA Lev2 daily FITS file
• Example LYRA Lev3 daily FITS file
• Example LYRA Lev4 daily EPS file

• LYRA Calibration File (Version 01) 09 Sep 2009