MJD | V | * | Image | B | * | Image | R | * | Images | I | * | Images |
---|---|---|---|---|---|---|---|---|---|---|---|---|
56142.31 | 16.95± 0.05 | TA | -- | - | - | -- | - | - | -- | - | - | |
56267.15 | -- | - | - | -- | - | - | 16.81± 0.04 | T | -- | - | - | |
56490.36 | 17.20± 0.04 | A | 17.48± 0.05 | A | -- | - | - | -- | - | - | ||
56536.23 | 17.20± 0.07 | A | -- | - | - | 17.05± 0.04 | A | -- | - | - | ||
56915.13 | 17.33± 0.04 | - | 17.51± 0.05 | - | 17.25± 0.04 | - | -- | - | - | |||
57227.31 | 17.53± 0.04 | - | 17.74± 0.04 | - | 17.17± 0.04 | - | -- | - | - | |||
57310.08 | 17.64± 0.11 | - | -- | - | - | -- | - | - | 16.66± 0.07 | X | ||
57633.28 | 17.46± 0.04 | - | 17.62± 0.05 | - | 17.24± 0.05 | - | -- | - | - | |||
57638.27 | 17.54± 0.05 | - | -- | - | - | -- | - | - | 17.07± 0.05 | - | ||
57928.37 | 16.84± 0.04 | X | 18.10± 0.06 | X | 17.05± 0.04 | X | 16.31± 0.06 | X | ||||
57958.29 | 17.36± 0.05 | - | 17.45± 0.05 | - | -- | - | - | 16.85± 0.05 | - | |||
57988.34 | 17.55± 0.05 | - | 17.70± 0.04 | - | 17.38± 0.06 | - | 17.03± 0.04 | - | ||||
58043.06 | 17.60± 0.06 | - | 17.50± 0.05 | - | -- | - | - | 16.97± 0.06 | - | |||
58077.11 | 17.60± 0.06 | - | 17.94± 0.07 | - | 17.43± 0.06 | - | 17.19± 0.08 | - | ||||
58098.09 | 17.66± 0.07 | - | 17.53± 0.04 | - | 17.16± 0.04 | A | -- | - | - | |||
58312.29 | 17.39± 0.04 | - | 17.63± 0.05 | - | 17.19± 0.04 | - | -- | - | - | |||
58316.26 | 17.63± 0.06 | - | -- | - | - | -- | - | - | 17.00± 0.05 | - | ||
58339.35 | 17.41± 0.04 | - | 17.68± 0.04 | - | 17.27± 0.06 | - | -- | - | - | |||
58341.23 | 17.26± 0.06 | - | 17.50± 0.05 | - | -- | - | - | -- | - | - | ||
58342.31 | 17.38± 0.04 | - | -- | - | - | -- | - | - | 17.03± 0.05 | - | ||
58366.12 | 17.26± 0.04 | - | 17.67± 0.06 | - | -- | - | - | -- | - | - | ||
58375.12 | 17.34± 0.04 | - | -- | - | - | 17.30± 0.08 | - | -- | - | - | ||
58403.08 | 17.23± 0.04 | - | -- | - | - | -- | - | - | 16.95± 0.07 | - | ||
58433.09 | 17.22± 0.06 | - | 17.41± 0.06 | - | 16.99± 0.06 | - | -- | - | - | |||
58671.33 | 17.19± 0.06 | A | 17.32± 0.05 | A | -- | - | - | -- | - | - | ||
58673.29 | 17.25± 0.08 | - | -- | - | - | 16.97± 0.07 | - | 16.69± 0.08 | - | |||
58695.34 | 17.16± 0.05 | - | -- | - | - | 17.01± 0.04 | - | 16.75± 0.04 | - | |||
58696.30 | 17.19± 0.07 | - | 17.39± 0.07 | - | 17.00± 0.08 | - | -- | - | - | |||
58750.10 | 17.14± 0.06 | A | 17.32± 0.06 | A | -- | - | - | -- | - | - | ||
58779.07 | 17.29± 0.07 | A | -- | - | - | 17.04± 0.05 | A | -- | - | - | ||
58812.08 | 17.27± 0.06 | A | -- | - | - | 17.05± 0.08 | - | 16.81± 0.05 | - | |||
59000.39 | 17.05± 0.07 | - | -- | - | - | 16.63± 0.11 | X | -- | - | - | ||
59055.31 | 17.25± 0.07 | - | -- | - | - | 17.01± 0.09 | - | -- | - | - | ||
59077.20 | 17.20± 0.08 | - | 17.51± 0.09 | - | 17.02± 0.08 | - | 16.79± 0.10 | - | ||||
59131.09 | 17.17± 0.07 | - | -- | - | - | 16.95± 0.07 | - | -- | - | - | ||
59166.12 | 17.25± 0.08 | - | -- | - | - | -- | - | - | 16.79± 0.10 | - | ||
59194.11 | 17.22± 0.07 | - | 17.38± 0.07 | - | -- | - | - | -- | - | - | ||
59376.35 | 17.12± 0.07 | - | 17.25± 0.07 | - | -- | - | - | -- | - | - | ||
59409.37 | 17.16± 0.08 | - | -- | - | - | 16.98± 0.08 | - | -- | - | - | ||
59441.26 | 17.34± 0.08 | - | 17.39± 0.08 | - | -- | - | - | 16.77± 0.09 | - | |||
59467.11 | 17.17± 0.11 | - | -- | - | - | 17.13± 0.08 | - | -- | - | - | ||
59522.04 | 17.02± 0.07 | - | 17.13± 0.07 | - | -- | - | - | 16.70± 0.12 | - | |||
59546.05 | 17.20± 0.07 | - | -- | - | - | 16.96± 0.07 | T | -- | - | - | ||
59583.10 | 17.12± 0.07 | - | 17.32± 0.07 | T | -- | - | - | -- | - | - | ||
59739.36 | 17.16± 0.07 | - | 17.34± 0.08 | - | 17.06± 0.08 | - | -- | - | - | |||
59816.14 | 17.32± 0.08 | - | -- | - | - | -- | - | - | 16.79± 0.07 | - | ||
59851.09 | 17.55± 0.14 | - | 17.39± 0.08 | - | 17.10± 0.09 | - | -- | - | - | |||
59879.03 | 17.08± 0.07 | - | -- | - | - | -- | - | - | 16.68± 0.07 | - | ||
59905.07 | 17.32± 0.07 | - | 17.38± 0.07 | - | 17.03± 0.07 | - | -- | - | - |
If the brightness variation is true variability then there should be a correlation between brightness changes recorded in different filter bands. The following table are the R-squared linear correlation factors calculated for the pairs of bands. The number in parentheses next to the R-squared value is the number of elements used to calculate the correlation factor. The number in square brackets next to the band is the range of magnitudes measured.
V [0.81 mag] | B [0.71 mag] | R [0.61 mag] | |
---|---|---|---|
B [0.81 mag] | 0.51 (26) | ||
R [0.61 mag] | 0.54 (25) | 0.72 (14) | |
I [0.52 mag] | 0.72 (17) | 0.87 (7) | 0.95 (6) |
The plots below are provided to check the values in the table above and also to show any non-linear correlations
Welch & Stetson (1993, AJ, 105, 1813) present a method for varible star detection in CCD images from automated surveys. Data from two bands are compared and two statistics are calculated: R and I.
The I-statistic has an expectation value of zero for stars that are NOT variable. A larger non-zero I-value indicates a higher likelihood that the star is variable. The R statistic indicates how the color of the star changes as the variable grows brighter with R = 1.0 being no change in color.
R and I values have only been calculated if there are more than four (4) matched measurements of brightness in each band.
V (I|R) | B (I|R) | R (I|R) | |
---|---|---|---|
B (I|R) | 6.06 | 0.99 | ||
R (I|R) | 4.36 | 1.08 | 4.83 | 0.32 | |
I (I|R) | 6.04 | 1.19 | 6.96 | 1.52 | 9.72 | 1.07 |
By John C. Martin, University of Illinois Springfield Henry R. Barber Research Observatory
Generated on 2023-08-14 14:15:12 UT-5