EXPLANATIONS TO THE TABLES OF SOHO/MDI DEBRECEN DATA SUNSPOT CATALOGUE The format of the facular catalogue is the same as that of the sunspot catalogue. The umbra area is zero for faculae, the position and MU data refer to the center of gravity of facular contour. The MP is mean magnetic field within the facular contour averaged the pixel values with sign. 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: SOHO (SOHO/MDI) 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 .50000 represents 0000 UT) 15 Position angle of the solar north pole in the image, or 0.00 if there are no spots in the SOHO/MDI image. 16 Heliographic latitude of the central point of the disk in the image, or 0.00 if there are no spots in the SOHO/MDI image ====================================================================================================== Rows beginning with character "g" (group) [ Rows beginning with character "d" (disk) in the tables of faculae] 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). 9 Total projected U (umbra) area of the group in millionths of the solar disc 10 Total projected U+P (umbra + penumbra) area of the group in millionths of the solar disc. 11 Total corrected U of the group in millionths of the solar hemisphere 12 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. 13 Heliographic latitude B; positive: North, negative: South 14 Heliographic longitude L 15 Longitudinal distance from the Sun's central meridian (LCM) 16 Position angle 17 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. 18 Mean magnetic field of umbrae averaged the umbra values with sign and weighted by area . 19 Mean magnetic field of penumbrae averaged the penumbra values with sign and weighted by area. ============================================================================================================ Rows beginning with character "s" (spot) [ Rows beginning with character "f" (facula) in the tables of faculae] 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 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 line-of-sight magnetic field within the umbra contour averaged the pixel values with sign. If there is no measurable umbra in the penumbra, its value is the magnetic field at the pixel of the smallest intensity minima within the penumbra contour or the center of gravity of the penumbra contour. 20 Mean line-of-sight magnetic field within the penumbra contour averaged the pixel values with sign.