********************************************************************** Final Science Report (Summary of Research), Resident Archive Services and Maintenance of the Yohkoh Legacy data Archive. NNX09AH64G (2009.4.7 through 2012.4.6) Aki Takeda (P.I.), Loren Acton, David McKenzie, Keiji Yoshimura (Montana State University), and Samuel Freeland (Lockheed Martin Solar and Astrophysics Laboratory). ********************************************************************** We are proud to report that, since 2009, our web interface collects 300-700 unique visitors per month (Appendix 1). Note that the number of monthly users in 2011 and 2012 are increasing more than 30% compared with those in 2009 and 2010. Those numbers are after removal of internal access (inside MSU) and that of several known search-engine robots. Most users turned out to visit for reviewing images and movies through our Quick Look or customized Movie Maker services. Downloading value-added data (Level_1 Level_2, and Level_3 products) from our archive follows next. After 11 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 40 scientific papers were published for the period, Jan-2009 through Apr-2012 (selected examples are listed in Appendix 4). We started our resident archive (RA) services in October, 2008, prior to the actual arrival of the relevant budget. Since then we have maintained our archive securely without major troubles, and served as the prime archive of the Yohkoh data products. Through one-year extension of the project term (with no cost), we completed our first RA contract in April, 2012. 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. We purchased a new server machine as proposed, and replaced the YLA data storage and web interface, which had shared the machine resource with other projects and individual researchers. The operation of YLA on the new server has started since November 2010, now providing stable and fast services to the general users. As reported in the above, the YLA web site collects 300 -- 700 visitors per month (monthly total of the number of daily unique users) since 2009. (2) Provide users individual assistance for accessing and handling data (the E-consultant service). Our E-consultant service has so far received 27 consultations from 22 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. We also received at least 12 requests (since 2008 August to date) from publishers, educators, and museums asking for permission to use the Yohkoh images (the most familiar example will be a wikipedia article, (http://en.wikipedia.org/wiki/Sun_as_an_X-ray_source). Most recently (Dec-2011), we received a request from a TV company in UK for movie images to show varying solar activity from minimum to maximum phase. (3) Enhancing connection with Virtual Solar Observatory (VSO). The YLA level_0 and level_1 products have been accessed through the VSO data service since 2005. The SXT Science Composites (level_2) became accessible in 2009. For the purpose of enhancing the connection between YLA and VSO, the creation of a new VSO search option with enhanced functionality and filtering of YLA search parameters has been developed in collaboration with the VSO team. Development of the new search page at the YLA end was completed in March, 2012. The VSO team is currently under work of installing the new search system including our pages. (4) Modernization of analysis software. Significant improvement was done in 2010 on the software to derive temperatures and emission measures from the SXT intensities. The SXT response functions were renewed using the latest atomic data available from the CHIANTI atomic database, version 6.0.1. The software tools that utilize the response functions were all modified to use the new SXT responses as well as the old version. The report of the updated SXT response functions was published in 2011 in Solar Physics. (5) Loading new products and improving the web interface The following value-added products were newly loaded to the archive. - SXT Synoptic Maps for the whole mission (Carrington Rotation No.1846-1985). - SXT limb flare catalog (developed by Sam Freeland at LMSAL). - SXT sigmoid catalog (developed by Canfield et al., 2007). (6) Preparing a ``transplant package" of the YLA products. All level_0 data (~400 GB) are maintained at several data centers worldwide (NASA, Japan and UK), and there are also backup files in our own site. The higher levels of core data are all reproducible from the level_0 data. The data generating software, imported data from other institutes (i.e., flare catalogs), and other unrecoverable document files are separately backed up once a year to a permanent recording medium. The YLA products are thereby highly robust against possible data loss due to hardware trouble. In addition to this, a mirroring service of our main data to DARTS (Japanese data center) has started since 2011. (7) 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. For these 4 years (2009-2012) 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. This activity received a good reception from both the students and organizer. Due to a large number of accesses and positive responses we received so far, we pride ourselves on being an active and well-maintained archive. It is our strong desire that, through the YLA RA services, we continue our contribution to the scientific community and to the public education as long as possible. We appreciate that our RA services are supported by the funds (NNX12AG78G) for the coming two years. == Appendix 1. == Monthly total of the number of daily unique users who accessed at least one of the YLA pages (1-Jan-2009 through 31-May-2012). ===================================================================== Jan. Feb. Mar. Apr. May Jun. Jul. Aug. Sep. Oct. Nov. Dec. ===================================================================== [2009] 360, 531, 598, 510, 405, 338, 387, 477, 617, 615, 292, 285 --------------------------------------------------------------------- [2010] 320, 295, 393, 494, 359, 292, 405, 445, 377, 416, 617, 534 --------------------------------------------------------------------- [2011] 716, 567, 532, 508, 503, 625, 358, 370, 490, 428, 588, 930 --------------------------------------------------------------------- [2012] 686, 686, 808, 643, 690, --------------------------------------------------------------------- == 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. ---------------------------------------------------------------------- 29-Oct-2008 & California State University, Northridge & D, A 03-Mar-2009 & California State University, Northridge & D, A 09-Apr-2009 & Predictive Science Inc., California & I 23-Apr-2009 & Swedish Institute of Space Physics & I 04-May-2009 & Wright State University, Ohio & D, A 04-May-2009 & Geomagnetic Laboratory, Natural Resources Canada & D 18-Jun-2009 & PPN PG College, Kanpur, India & I 06-Jul-2009 & Alabama Agr. and Mech. University & I 08-Jul-2009 & University of Potsdam, Germany & A 13-Jul-2009 & Wright State University, Ohio & D, A 17-Jul-2009 & Universidad Tecnologica Naciona, Argentina & I 14-Sep-2009 & Harvard-Smithsonian, Center for Astrophysics, MA & I 04-Dec-2009 & University of California, Berkley & A 16-Feb-2010 & Lockheed Martin Solar and Astrophyscal Lab. & I 08-Mar-2010 & Montana State University & I, A 03-May-2010 & Lockheed Martin Solar and Astrophyscal Lab. & I 18-May-2010 & Montana State University & I 06-Aug-2010 & Montana State University & I, A 16-Sep-2010 & Universidad Tecnologica Naciona, Argentina & I 24-Sep-2010 & Montana State University & I 23-Dec-2010 & personal business (domestic) & I 28-Feb-2011 & University of California, Los Angels & D, A 01-Mar-2011 & Wroclaw University, Poland & I 28-Jul-2011 & University of California, Berkeley & D, A 12-Oct-2011 & Pioneer TV, UK & D 02-Dec-2011 & Montana State University & A 07-Dec-2011 & Oxford Centre for Collaborative Applied Math. UK & I --------------------------------------------------------------------- == Appendix 3. == Yohkoh or YLA related presentations. In November, 2008, Takeda made an oral presentation in an international symposium, "Fifty Years after International Geophysical Year, - Modern Information Technologies and Earth and Solar Sciences -", held in Tsukuba, Japan. This is our first announcement to the public, on our RA services. The proceeding of this presentation was published as a refereed paper in Data Science Journal (Takeda et al., 2009). In October, 2009, McKenzie presented an invited talk to the 19th Astronomical Data Analysis Software and Systems (ADASS) meeting in Sapporo, Japan. The presentation, "Cycles of Activity: Acquiring, Preparing, and Exploiting X-ray Images of the Solar Corona" demonstrated to the international audience the worth of the YLA and availability of the data. In December 2010, Takeda attended AGU Fall meeting at San Francico, and made poster presentation, entitled "An Invitaion to the improved Yohkoh Legacy data Archive". == Appendix 4. == Yohkoh related papers published in 2009 through 2012 (20 papers selected). --------------------------------------------------------------- Hara,H. 2009, The Astrophysical Journal, 697, 980-984 Differential Rotation Rate of X-ray Bright Points and Source Region of their Magnetic Fields Lean,J.L., Picone, J. M., & Emmert, J. T. 2009, Journal of Geophysical Research (Space Physics), 114, 7301 Quantitative forecasting of near-term solar activity and upper atmospheric density McKenzie,D.E. and Savage,S.L. 2009, The Astrophysical Journal, 697, 1569-1577 Quantitative examination of supra-arcade downflows in eruptive solar flares Rubio da Costa, F., Fletcher,L., Labrosse,N., and Zuccarello,F. 2009, Astronomy and Astrophysics, 507, 1005-1014 Observations of a solar flare and filament eruption in Lyman alpha and X-rays Sakamoto,Y., Tsuneta, S., \& Vekstein, G. 2009, The Astrophysical Journal, 703, 2118-2130 A Nanoflare Heating Model and Comparison with Observations Shin,J. and Sakurai,T. 2009, Solar Physics, 254, 357-384, 385-386 Optical characteristics of the soft X-ray telescope aboard Yohkoh. I. Interpretation of the undersampled point spread function Shin,J., & Sakurai, T. 2009, Advances in Space Research, 43, 101 Studies on the imaging characteristics of Yohkoh Soft X-ray Telescope: Optical aberration and scattering Takeda, A., Acton, L., McKenzie, D., Yoshimura, K. and Freeland, S. Data Science Journal, 2009, vol.8, pp.IGY1-IGY5 Resident Archive Services of the Yohkoh Legacy data Archive Tomczak,M. 2009, Astronomy and Astrophysics, 502, 665 The YOHKOH survey of partially occulted flares in hard X-rays Morimoto,T., Kurokawa, H., Shibata, K., & Ishii, T. T. 2010, Publications of the Astronomical Society of Japan, 62, 939 Energetic Relations between the Disappearing Solar Filaments and the Associated Flare Arcades Nishizuka,N., Takasaki, H., Asai, A., & Shibata, K. 2010, The Astrophysical Journal, 711, 1062-1072 Multiple Plasmoid Ejections and Associated Hard X-ray Bursts in the 2000 November 24 Flare Liu,R., Xu, Y., & Wang, H. 2011, Solar Physics, 269, 67-82 A Revisit of the Masuda Flare Song,Q., Huang, G., & Nakajima, H. 2011, The Astrophysical Journal, 734, 113 Co-analysis of Solar Microwave and Hard X-Ray Spectral Evolutions. I. In Two Frequency or Energy Ranges Savage,S.L., & McKenzie, D. E. 2011, The Astrophysical Journal, 730, 98 Quantitative Examination of a Large Sample of Supra-arcade Downflows in Eruptive Solar Flares Vats,H.O., & Chandra, S. 2011, Monthly Notices of the Royal Astronomical Society, 413, L29 North-south asymmetry in the solar coronal rotation Takeda,A. 2011, Solar Physics, 273, 295-306 Characteristics of the Re-Calculated Yohkoh/SXT Temperature Response Wang, T. 2011, Space Science Reviews, Online First, 16 Standing Slow-Mode Waves in Hot Coronal Loops: Observations, Modeling, and Coronal Seismology Cremades,H., Mandrini, C. H., & Dasso, S. 2011, Solar Physics, 274, 233-249 Coronal Transient Events During Two Solar Minima: Their Solar Source Regions and Interplanetary Counterparts Savage,S.L., McKenzie, D. E., & Reeves, K. K. 2012, The Astrophysical Journal, 747, L40 Re-interpretation of Supra-arcade Downflows in Solar Flares Tomczak,M., & Chmielewska, E. 2012, The Astrophysical Journal Supplement Series, 199, 10 A Catalog of Solar X-Ray Plasma Ejections Observed by the Soft X-Ray Telescope on Board Yohkoh --------------------------------------------------------------- ====== end of report =====