EXPLANATIONS TO THE TABLES OF SDO/HMI - DEBRECEN DATA SUNSPOT CATALOGUE The tables contain three kinds of rows; they are explained separately. Rows beginning with character "h" (hour): Column Description 1 Data code: h 2 Year 3 Month 4 Day of month 5 Hour UT 6 Minute UT 7 Second UT 8 Origin of the observation: SHMI=SDO/HMI) 9 Number of sunspot groups 10 Hourly sum of projected U (umbra) area in millionths of the solar disc 11 Hourly sum of projected U+P (umbra + penumbra) area in millionths of the solar disc 12 Hourly sum of corrected U in millionths of the solar hemisphere 13 Hourly sum of corrected U+P in millionths of the solar hemisphere If every area data is 0, this means observation with no spots. 14 Julian Date (by convention .50000000 represents 0000 UT) 15 Position angle of the solar north pole in the processed image 16 Heliographic latitude of the central point of the disk in the processed image 17 Heliographic longitude of the central point of the disk in the processed image, 18 999999 19 999999 20 999999 ====================================================================================================== Rows beginning with character "g" (group) Column Description 1 Data code: g 2 Year 3 Month 4 Day of month 5 Hour UT 6 Minute UT 7 Second UT 8 NOAA sunspot group number. If no NOAA number was assigned for the group, a NOAA number was given with an additional letter (e.g. "m", "n", etc. on the basis of DPD, "s", "t", etc. for groups observed only by SOHO/MDI). In the case of full-disk catalog it is the year. 9 Number of sunspots in the sunspot group 10 Total projected U (umbra) area of the group in millionths of the solar disc 11 Total projected U+P (umbra + penumbra) area of the group in millionths of the solar disc. 12 Total corrected U of the group in millionths of the solar hemisphere 13 Total corrected U+P of the group in millionths of the solar hemisphere The following entries refer to the position of the given sunspot group, which is the mean position of its spots weighted by the U+P areas of the single spots. In the case of several umbrae within the same penumbra the mean weighted umbra position was calculated within their common penumbra prior to the calculation of group mean position. 14 Heliographic latitude B; positive: North, negative: South 15 Heliographic longitude L 16 Longitudinal distance from the Sun's central meridian (LCM) 17 Position angle 18 Distance from the centre of Sun's disc measured in units of the solar radius Mean values of the line-of-sight magnetic field are computed if Ic images and magnetograms are available within 50 min. The estimated precision of the means is about a few times of ten Gauss. If each magnetic data is 999999, this means that there are no magnetic observations within plus-minus 50 minutes time-interval around the time of continuum observation. 19 Mean magnetic field of umbrae averaged the umbra values with sign and weighted by area . 20 Mean magnetic field of penumbrae averaged the penumbra values with sign and weighted by area. ============================================================================================================ Rows beginning with character "s" (spot) Column Description 1 Data code: s 2 Year 3 Month 4 Day of month 5 Hour UT 6 Minute UT 7 Second UT 8 NOAA sunspot group number In the case of full-disk catalog it is the year. 9 No. of spot within the group 10 Projected U (umbra) area in millionths of the solar disc, negative values indicate that the umbra consists of fragmented regions which cannot be separated without losing umbral area. In this way several spots (intensity minima in the umbra) have a common umbra, e.g. -2 means that the given spot shares an umbra with spot No.2, and the common U value is indicated at spot No.2. 11 Projected U+P (umbra + penumbra) area in millionths of the solar disc, negative values indicate that several umbrae have a common penumbra, e.g. -7 means that the given umbra shares a penumbra with umbra No.7, and the U+P value is indicated at No.7. 12 Corrected U in millionths of the solar hemisphere, for negative values see Column 24-28. 13 Corrected U+P in millionths of the solar hemisphere, for negative values see Column 29-33. 14 Heliographic latitude B; positive: North, negative: South 15 Heliographic longitude L 16 Longitudinal distance from the Sun's central meridian (LCM) 17 Position angle 18 Distance from the centre of Sun's disc measured in units of the solar radius Mean values of the line-of-sight magnetic field are computed if Ic images and magnetograms are available within 50 min. The estimated precision of the means is about a few times of ten Gauss. If each sunspot magnetic data is 999999, this means that there are no available magnetic observations within plus-minus 50 minutes time-interval around the time of continuum observation. If the spots with negative values in the area columns have magnetic value of 999999, this means that they shares common umbra or penumbra border with another spot, thus, the avarage magnetic field values are indicated in the raw of that another spot. 19 Mean magnetic field within the umbra contour averaged the pixel values with sign. 20 Mean magnetic field within the penumbra contour averaged the pixel values with sign.