********************************************************************** Final Science Report (Summary of Research), Data Services Continuation : Resident Archive Services of the Yohkoh Legacy data Archive. NNX12AG78G (2012.4.1 through 2014.3.31) Aki Takeda (P.I.), Loren Acton, David McKenzie, Keiji Yoshimura (Montana State University), and Samuel Freeland (Lockheed Martin Solar and Astrophysics Laboratory). ********************************************************************** We started our resident archive (RA) services from October, 2008. Since then we have served as the prime archive of the Yohkoh data products; providing best calibrated or value added Yohkoh products, updated software and user supports to the world wide community. This final report covers our achievement during our second RA contract with NASA, 1-Apr-2012 through 31-Mar-2014. The work we proposed and the achievement we made for them are as follows. (1) Keep our products well maintained and store them in a place users can access in a convenient and comfortable manner. From the period January 2012 through March 2014, the YLA web interface collects 250-350 unique visitors per month (Appendix 1). These numbers are after removal of internal access (inside MSU) and that of several known search-engine robots. We also removed the access to the top page only and the access without proper referrer to eliminate the access unintended to use our contents. The major purpose of the visitors is viewing documentation, followed by making use of the customized Movie Maker and observing log inquiry services. After 13 years from the end of Yohkoh mission, the publication of the scientific papers using Yohkoh data continues. As summarized in http://www.lmsal.com/~aschwand/publications/yohkoh.html, there are at least 15 scientific papers were published for the period, Jan-2012 through Dec-2013 (as listed in Appendix 4). (2) Provide users individual assistance for accessing and handling data (the E-consultant service). Our E-consultant service has received 13 consultations from 12 different researchers, including 9 consultations from outside the United States. Appendix 2 is a brief summary of the consultations. Some are just a quick inquiry or bug report, others are seeking research collaboration. (3) Prepare documentation on the archive and new calibration. An over 60 page document, describing the re-calibration of the SXT data achieved from 2002 through 2014 was prepared as follows: "On-Orbit Performance and Calibration of the Soft X-ray Telescope on Yohkoh", by Loren Acton. This document discusses the following topics. - Yohkoh attitude control and SXT pointing reliability, - SXT aspect sensor (white-light telescope) performance, - SXT entrance filter failure and stray visible light correction, - SXT sensitivity calibration, - CCD performance. http://ylstone.physics.montana.edu/ylegacy/documents/publication/YLA_SXTcalibration.pdf A subset of this document is planned to submit to a refereed journal (Solar Physics) in 2014. (4) Maintenance and improvement of analysis software. - Re-calculation of SXT response functions with the latest atomic database. SXT's temperature response to a model solar radiation is an elemental factor to conduct quantitative analysis with SXT data. It is important to keep it up with the latest atomic data, which have effect on a solar spectral model. While the initial SXT response functions were based on the papers in 1985 and 1986 (by Mewe et al.), we re-calculated them with recent data provided by the CHIANTI atomic database. In 2011, SXT response functions were re-calculated with CHIANTI version 6.01, and in 2014 updated to base on CHIANTI version 7.13. The Yohkoh/SXT software for deriving temperatures were accordingly updated to access the new response functions. - Refinement of FITS header tags. A majority part of FITS headers of the YLA SXT products are created by converting the index structure (containing information of the data file) of the Yohkoh specific format into FITS header structure. While the former includes vector expression of the quantities, the latter only allows scalar expression in each tag. Because of this structural difference, the information initially included in the index structures are sometimes dropped in the FITS header structures, and made such headers imperfect or useless. The YLA re-defined a few FITS headers to compensate lost information or to use same expression as more recent solar missions. Related software were modified accordingly. On the other hand, useless or erroneous FITS headers were eliminated as much as found. - Yohkoh Analysis Guides correction. The description on the relative alignment of SXT and Aspect Sensor (the white-light telescope coaxial with SXT) was updated based on the post-mission re-calibration made by YLA. Related software were modified to reflect new results. Obsolete contact persons/addresses were replaced with YLA in each instrumental section. Below are not explicitly itemized in the proposal, but important achievement made during the contract period. (5) Injection of the YLA products to general archive/data-search services. - Helioviewer: In February 2013, the YLA Level_3 products were successfully injected to the Helioviewer project. The YLA level_3 images were converted to Jpeg2000 format by YLA then final adaptation to the Helioviewer system was done by a Helioviewer staff. Yohkoh/SXT images are browsable from http://www.helioviewer.org/ . - SDAC : In March 2014, the transfer of the YLA basic data (Level_0, 1, 2, and 3 products in FITS and Yohkoh specific format) to the Solar Data Analysis Center(SDAC) at NASA was completed. These data are supposed to be a part of the final archive of the Yohkoh project per NASA data management policy after YLA is no more maintained in the future. http://umbra.nascom.nasa.gov/newsite/data.html http://umbra.nascom.nasa.gov/yohkoh/docs/yla/README_YLA_basic_products.html - Yohkoh special search page at VSO: This is the web service that YLA has been requested for years to the Virtual Solar Observatory(VSO) team in order to enhance the efficiency of the search of the YLA data. http://sao.virtualsolar.org/YLA (6) Public outreach (not itemized in the proposal). Since 2009, we participated in a local educational event for middle school female students, "Expand Your Horizon" held yearly at Montana State University. From 2009 to 2013, we provided Yohkoh full-sun images observed on the birthday of the students, since the Yohkoh mission well covers the birthdays of the current middle school students. In 2014, the birth dates of the middle school students started to top out from the Yohkoh mission, and so this activity was withheld. == Appendix 1. == Monthly total of the number of daily unique users who accessed at least one of the YLA pages (1-Jan-2012 through 31-Mar-2014). ===================================================================== Jan. Feb. Mar. Apr. May Jun. Jul. Aug. Sep. Oct. Nov. Dec. ===================================================================== [2012] 300, 317, 376, 300, 340, 283, 266, 370, 287, 336, 349, 290 --------------------------------------------------------------------- [2013] 341, 346, 355, 454, 367, 378, 350, 361, 284, 342, 292, 235 --------------------------------------------------------------------- [2014] 257, 259, 388 --------------------------------------------------------------------- == Appendix 2. == E-consultant services we received. Only dates, the institutes of the researchers, and the type of consultation are shown. In the third column, I: inquiry, D : data request, A: analysis support. ---------------------------------------------------------------------- 12-May-2012 & University of St. Andrews, UK. & I 29-May-2012 & Thames & Hudson publisher. & I 29-May-2012 & National Astronomical Observatory, Japan. & D 25-Jun-2012 & Smithsonian Astrophysical Observatory. & I 12-Jul-2012 & Cambridge University Press, UK. & I 04-Sep-2012 & High Altitude Observatory. & D 15-Oct-2012 & Helsinki Observatory, Finland. & I 17-Oct-2012 & Natural Resources Canada. & I 06-Jun-2013 & Japan Aerospace Exploration Agency. & I 20-Apr-2013 & Wroclaw University, Poland. & A 01-Aug-2013 & Japan Aerospace Exploration Agency. & I 06-Aug-2013 & Technische Universitat Muenchen, Germany & I 10-Feb-2014 & Harvard-Smithsonian Center for Astrophysics. & A --------------------------------------------------------------------- == Appendix 3. == Yohkoh related papers published in 2012 and 2013. --------------------------------------------------------------- Choudhary,D.P. 2012, Advances in Space Research, 49, 416 Photospheric flows in the active regions (asymmetric and localized Doppler velocities) Martens,P.C.H., Attrill, G. D. R., Davey, A. R., et al. 2012, SP 275, 79-113 Computer Vision for the Solar Dynamics Observatory (SDO) Miroshnichenko,L.I., & Gan, W. Q. 2012, Advances in Space Research, 50, 736 Particle acceleration and gamma rays in solar flares: Recent observations and new modeling Netzel,A., Mrozek, T., Kolomanski, S., & Gburek, S. 2012, Astronomy and Astrophysics, 548, A89 Extreme-ultraviolet and hard X-ray signatures of electron acceleration during the failed eruption of a filament Savage,S.L., McKenzie, D. E., & Reeves, K. K. 2012, ApJ 747, L40 Re-interpretation of Supra-arcade Downflows in Solar Flares Schmelz,J.T., Kimble, J. A., & Saba, J. L. R. 2012, ApJ 757, 17 Deriving Plasma Densities and Elemental Abundances from SERTS Differential Emission Measure Analysis Tomczak,M., & Chmielewska, E. 2012, ApJSS 199, 10 A Catalog of Solar X-Ray Plasma Ejections Observed by the Soft X-Ray Telescope on Board Yohkoh Vats,H.O. 2012, Planetary and Space Science, 63, 158 Interplanetary magnetic field and solar rotation Asai,A., Kiyohara, J., Takasaki, H., et. al, 2013, The Astrophysical Journal, 763, 87 Temporal and Spatial Analyses of Spectral Indices of Nonthermal Emissions Derived from Hard X-Rays and Microwaves Jakimiec,J., & Tomczak, M. 2013, Solar Physics, 286, 427 Quasi-periodic Variations in the Hard X-ray Emission of a Large Arcade Flare Javaraiah,J. 2013, Solar Physics, 287, 197 A Comparison of Solar Cycle Variations in the Equatorial Rotation Rates of the Sun's Subsurface, Surface, Corona, and Sunspot Groups Landi,E., Miralles, M. P., Raymond, J. C., & Hara, H. 2013, The Astrophysical Journal, 778, 29 Hot Plasma Associated with a Coronal Mass Ejection Porfireva,G.A., & Yakunina, G. V. 2013, Geomagnetism and Aeronomy, 53, 977 Destabilization, interaction, and eruption of filaments on the sun and associated phenomena Pucci,S., Poletto, G., Sterling, A. C., & Romoli, M. 2013, The Astrophysical Journal, 776, 16 Physical Parameters of Standard and Blowout Jets Shin,J., Sakurai,T. 2013SoPh..tmp..143S Vignetting effect in the soft X-ray telescope onboard Yohkoh: I. Numerical simulation --------------------------------------------------------------- ====== end of report =====