A1D2.2
Lead Beneficiary: KO
Beneficiaries involved: HVAR, ROB, UNIGRAZ
Due Date: month 36
Goal
The primary aim is to provide a detailed SOHO/MDI-Debrecen Data (SDD) catalogue of sunspots and sunspot groups based on SOHO/MDI observations for the whole SOHO era, whereas a network of ground-based observatories also contributes to the completeness of the material and data validation. Further aims are to conduct comparative studies with the existing ground-based sunspot data, to digitize historical materials to increase the period covered by online solar images, and to make long-term and short-term studies by using the new and old sunspot data.
Progress so far
The percentage towards the goal of the deliverable: 30%. Substantial development has been achieved in the hardware and software of sunspot data reduction. Several ground-based or space-borne datasets gathered and/or derived in the frame of the project are already available on-line.
The first amount of SDD, the full-disk material of 2008 (fdSDD2008), have been uploaded to the address: http://fenyi.solarobs.unideb.hu/SDD/SDD.html at KO. This is the start of the data publication undertaken for 14 months from the beginning of the project. In addition, the fdSDD1996 was recomputed, because the MDI magentograms were recalibrated at the end of 2008.
Several contributions to the tasks of ground-based observations and long term studies were made. KO published the Debrecen Photoheliographic Data (DPD) for 2003, 2007 and 2008 at http://fenyi.solarobs.unideb.hu/DPD. The DPD program needs a broad cooperation, within SOTERIA the digital images from ROB and UNIGRAZ are used for which the KO software has been suitably taylored. New user-friendly HTML presentation was developed for the ground-based sunspot dataset, and it is being developed further for SDD data. Digitization of the daily ground-based observations for 1986-1988 was made and published, this is part of the program in which full-disc images are continuously uploaded as an appendix of DPD. Digitization of the historical sunspot drawing observations by Konkoly (founder of KO) for 1872-1891 was made. Digitization and sunspot group encoding for the Uccle sunspot drawing collection is in progress at ROB. The resulting sunspot group database will provide complementary information feeding or extending the DPD catalog. The Uccle catalog of ROB spanning the period 1940 to 2009 should be completed within 12 months. This includes for instance the measurement of the dipole tilt. This will provide a new opportunity for the cooperation between ROB and KO, because KO already delivered the DPD sunspot group tilt data for the years 1986-2003 within the project. This kind of data, suitable for flux transport dynamo studies, didn't exist at all for this period. This is already a base for cooperation, outside SOTERIA, with MPI.
Comparisons of sunspot position measurements from different data sets were made in cooperation between HVAR and UNIGRAZ. The heliographic coordinates of selected sunspot groups observed in the years 1972 and 1993 were determined from Kanzelhöhe (UNIGRAZ) drawings which are available in digitized form. For an identification of sunspot groups the Debrecen (KO) data were also used. A special software for the determination of tracer's positions in full disc solar images, Sungrabber, was developed. Two observers were involved in data reduction and the determined heliographic coordinates (solar latitude and longitude) were compared with the Greenwich Photoheliographic Results for the year 1972 and with the SOON/USAF/NOAA data for the year 1993. A new analysis of the correlation of the velocity components (residual rotational velocity and meridional velocity) using sunspot groups has been started. R. Brajša has visited ROB and UNIGRAZ for cooperation on these research topics and coordination of the common work. D. Ruždjak has visited UNIGRAZ for data reduction.
Personnel involved:
KO: A. Ludmány, T. Baranyi, L. Győri (researchers), Á. Sáriné, I. Dobiné, N. Nagy, D. Fenyvesi (assistants).
ROB: F. Clette
HVAR: R. Brajsa, V. Ruždjak, D. Ruždjak, D. Sudar
UNIGRAZ: W. Otruba
Problem areas
No problem is found at the moment of this report.
Suggestions for collaboration
Further collaborations has been proposed by the representatives of HVAR and KO in october, 2009, these institutes will make mutual comparisons of their sunspot measurements made by their own methodologies.
