EXPLANATIONS TO THE TABLES OF SOHO/MDI DEBRECEN DATA SUNSPOT CATALOGUE The tables contain three kinds of rows; they are explained separately. Rows beginning with character "h" (hour): Column Character Fmt Description 1 1 A1 Data code: h 2 A1 Blank 2 3-6 I4 Year 7 A1 Blank 3 8-9 I2 Month 10 A1 Blank 4 11-12 I2 Day of month 13 A1 Blank 5 14-15 I2 Hour UT 16 A1 Blank 6 17-18 I2 Minute UT 19 A1 Blank 7 20-21 I2 Second UT 22 A1 Blank 8 23-26 A4 Origin of the observation: SOHO (SOHO/MDI) 9 27-35 A9 Blank 10 36-40 I5 Hourly sum of projected U (umbra) area in millionths of the solar disc 41 A1 Blank 11 42-46 I5 Hourly sum of projected U+P (umbra + penumbra) area in millionths of the solar disc 47 A1 Blank 12 48-52 I5 Hourly sum of corrected U in millionths of the solar hemisphere 53 A1 Blank 13 54-58 I5 Hourly sum of corrected U+P in millionths of the solar hemisphere If every area data is 0, this means observation with no spots. 59 A1 Blank 14 60-72 F13.5 Julian Date (by convention .50000 represents 0000 UT) 73 A1 Blank 15 74-79 F6.2 Position angle of the solar north pole in the image, or 0.00 if there are no spots in the SOHO/MDI image. 80-81 A2 Blank 16 82-86 F5.2 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) Column Character Fmt Description 1 1 A1 Data code: g 2 A1 Blank 2 3-6 I4 Year 7 A1 Blank 3 8-9 I2 Month 10 A1 Blank 4 11-12 I2 Day of month 13 A1 Blank 5 14-15 I2 Hour UT 16 A1 Blank 6 17-18 I2 Minute UT 19 A1 Blank 7 20-21 I2 Second UT 22 A1 Blank 8 23-28 A6 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 29-35 A7 Blank 10 36-40 I5 Total projected U (umbra) area of the group in millionths of the solar disc 41 A1 Blank 11 42-46 I5 Total projected U+P (umbra + penumbra) area of the group in millionths of the solar disc. 47 A1 Blank 12 48-52 I5 Total corrected U of the group in millionths of the solar hemisphere 53 A1 Blank 13 54-58 I5 Total corrected U+P of the group in millionths of the solar hemisphere 59 A1 Blank 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 60-65 F6.2 Heliographic latitude B; positive: North, negative: South 66 A1 Blank 15 67-72 F6.2 Heliographic longitude L 73 A1 Blank 16 74-79 F6.2 Longitudinal distance from the Sun's central meridian (LCM) 80 A1 Blank 17 81-86 F6.2 Position angle 87 A1 Blank 18 88-93 F6.4 Distance from the centre of Sun's disc measured in units of the solar radius 94 A1 Blank 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 95-101 F6.1 Mean magnetic field of umbrae averaged the umbra values with sign and weighted by area . 102 A1 Blank 20 103-109 F6.1 Mean magnetic field of penumbrae averaged the penumbra values with sign and weighted by area. ============================================================================================================ Rows beginning with character "s" (spot) Column Character Fmt Description 1 1 A1 Data code: s 2 A1 Blank 2 3-6 I4 Year 7 A1 Blank 3 8-9 I2 Month 10 A1 Blank 4 11-12 I2 Day of month 13 A1 Blank 5 14-15 I2 Hour UT 16 A1 Blank 6 17-18 I2 Minute UT 19 A1 Blank 7 20-21 I2 Second UT 22 A1 Blank 8 23-28 A6 NOAA sunspot group number 29 A1 Blank 9 30-34 I5 No. of spot within the group 35 A1 Blank 10 36-40 I5 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. 41 A1 Blank 11 42-46 I5 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. 47 A1 Blank 12 48-52 I5 Corrected U in millionths of the solar hemisphere, for negative values see Column 24-28. 53 A1 Blank 13 54-58 I5 Corrected U+P in millionths of the solar hemisphere, for negative values see Column 29-33. 59 A1 Blank 14 60-65 F6.2 Heliographic latitude B; positive: North, negative: South 66 A1 Blank 15 67-72 F6.2 Heliographic longitude L 73 A1 Blank 16 74-79 F6.2 Longitudinal distance from the Sun's central meridian (LCM) 80 A1 Blank 17 81-86 F6.2 Position angle 87 A1 Blank 18 88-93 F6.4 Distance from the centre of Sun's disc measured in units of the solar radius 94 A1 Blank 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 95-101 F6.1 Mean magnetic field within the umbra contour averaged the pixel values with sign. 102 A1 Blank 20 103-109 F6.1 Mean magnetic field within the penumbra contour averaged the pixel values with sign.