Summary table of databases at the Debrecen Observatory
The primary task of the Debrecen Heliophysical Observatory (DHO) has been the most detailed, reliable, and precise documentation of the solar photospheric activity. This long-term effort resulted in various solar catalogs based on ground-based and space-borne observations. The revised version of GPR catalog was converted to DPD format to create a homogeneous sunspot database covering more than 140 years. The database of images for the GPR era was completed with the full-disc drawings of the Hungarian historical observatories Ógyalla and Kalocsa (1872–1919) and with the polarity drawings of Mount Wilson Observatory. User-friendly web-presentations and on-line tools were developed to visualize and search data. The table below summarizes the main characteristics of the databases available at DHO.
Description of the columns:Attribute
Debrecen Photoheliographic Data (DPD) based on white-light full-disc observations taken at DHO and at the cooperating observatories
SOHO/MDI–Debrecen Data (SDD) based on the Michelson Doppler Imager (MDI) of the Solar and Heliospheric Observatory (SOHO)
SDO/HMI–Debrecen Data (HMIDD) based on the Helioseismic and Magnetic Imager (HMI) of the Solar Dynamics Observatory (SDO)
Quick-Look data based on SDO/HMI
Hungarian Histororical Solar Drawings (HHSD)
Greenwich Photoheliographic Results (GPR) revised and converted to DPD format
| Table of the main attributes of solar databases available at the Debrecen Observatory with links to the related sites | ||||||
|---|---|---|---|---|---|---|
| DPD | SDD | HMIDD | Quick-Look | HHSD | GPR revised | |
| interval of data | 1974– | 1996–2010 | 2010–2014 | 2014– | 1872–1919 | 1874-1976 |
| cadence | 1 day | ≈1.5 hours | 1 hour | 1 day | sporadic daily | 1 day |
| type of photospheric observation | ground-based | space-borne | space-borne | space-borne | ground-based | ground-based |
| sunspot group data | YES | YES | YES | YES | no | YES |
| sunspot data | YES | YES | YES | YES | no | no |
| magnetic data of spots | no | YES | YES | no | no | no |
| tilt angle/magnetic tilt angle | YES/no | YES/YES | YES/YES | no/no | no/no | no/no |
| facular data | no | YES | YES | no | no | no |
| HTML platform | YES | YES | YES | YES | at GPR | YES |
| white-light/continuum images appended | photographic/CCD | MDI | HMI | HMI | drawings | drawings |
| magnetic observations appended | YES | YES | YES | YES | no | starting at 1917 |
| online queries for spot data/tilt angles | YES /YES | YES/YES | no/no | no/no | no/no | YES/no |
DATA POLICY:
The detailed description of the databases listed here can be found in the following article:
Baranyi, T., Győri, L., Ludmány, A.,
On-line Tools for Solar Data Compiled at the Debrecen Observatory and their Extensions with the Greenwich Sunspot Data,
Solar Physics, 291, 3081-3102, 2016,
DOI: 10.1007/s11207-016-0930-1
If any data or related on-line tools are used in any publications, please refer to the article above.
If the DPD or HMIDD data are used, please also refer to this article:
Győri, L., Ludmány, A., Baranyi, T., Comparative analysis of Debrecen sunspot catalogues,
Monthly Notices of the Royal Astronomical Society, 465 (2), 1259-1273, 2017,
DOI: 10.1093/mnras/stw2667
If any tilt angle data are used in any publications, please also refer to this article:
Baranyi, T.: 2015, Comparison of Debrecen and Mount Wilson/Kodaikanal sunspot group tilt angles and the Joy's law, MNRAS, 447,
(4): 1857-1865, DOI:10.1093/mnras/stu2572
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Contact person/PI of the DPD project: Tünde Baranyi (e-mail:baranyi[at]tigris.unideb.hu); Requests, comments, questions, bug-reporting, or suggestions for collaborative studies are welcome.
