MJD | V | * | Image | B | * | Image | R | * | Images | I | * | Images |
---|---|---|---|---|---|---|---|---|---|---|---|---|
56142.33 | 17.16± 0.06 | T | -- | - | - | -- | - | - | -- | - | - | |
56267.14 | -- | - | - | -- | - | - | 16.52± 0.05 | T | -- | - | - | |
56490.38 | 17.21± 0.04 | T | -- | - | - | -- | - | - | -- | - | - | |
56536.26 | 17.20± 0.05 | - | -- | - | - | 16.56± 0.06 | - | -- | - | - | ||
56537.20 | 17.18± 0.05 | - | 18.23± 0.07 | - | -- | - | - | -- | - | - | ||
56915.14 | 17.14± 0.03 | A | 18.10± 0.06 | A | 16.48± 0.04 | A | -- | - | - | |||
57227.33 | 17.18± 0.04 | A | 18.15± 0.05 | A | 16.52± 0.04 | A | -- | - | - | |||
57310.09 | 17.21± 0.04 | A | -- | - | - | -- | - | - | 15.92± 0.06 | A | ||
57633.30 | 17.19± 0.05 | A | 18.19± 0.07 | A | 16.52± 0.05 | A | -- | - | - | |||
57635.35 | 17.16± 0.05 | - | -- | - | - | -- | - | - | 15.83± 0.06 | - | ||
57638.27 | 17.25± 0.05 | - | -- | - | - | -- | - | - | 15.93± 0.04 | - | ||
57928.34 | 17.17± 0.04 | A | 18.15± 0.06 | A | 16.51± 0.05 | A | 15.89± 0.07 | A | ||||
57958.27 | 17.22± 0.05 | A | 18.20± 0.07 | A | -- | - | - | 15.91± 0.05 | A | |||
57963.26 | 17.18± 0.06 | - | 18.15± 0.07 | - | -- | - | - | -- | - | - | ||
57988.22 | 17.12± 0.07 | - | 18.17± 0.08 | - | -- | - | - | 15.87± 0.06 | - | |||
58035.03 | 17.21± 0.04 | - | -- | - | - | 16.49± 0.04 | - | -- | - | - | ||
58043.05 | 17.20± 0.04 | A | 18.27± 0.06 | A | 16.50± 0.04 | - | 15.88± 0.05 | - | ||||
58045.05 | 17.19± 0.05 | - | -- | - | - | -- | - | - | 15.83± 0.06 | - | ||
58067.10 | 17.18± 0.05 | - | -- | - | - | -- | - | - | 15.85± 0.06 | - | ||
58073.09 | 17.20± 0.06 | - | 18.17± 0.08 | - | -- | - | - | -- | - | - | ||
58077.08 | 17.16± 0.07 | - | -- | - | - | -- | - | - | 15.82± 0.07 | - | ||
58098.09 | 17.27± 0.05 | A | 18.31± 0.06 | A | 16.67± 0.03 | A | -- | - | - | |||
58103.08 | 17.21± 0.05 | - | -- | - | - | -- | - | - | 15.88± 0.07 | - | ||
58312.26 | 17.20± 0.06 | - | 18.18± 0.07 | - | 16.52± 0.06 | - | -- | - | - | |||
58316.24 | 17.22± 0.06 | - | -- | - | - | -- | - | - | 15.89± 0.06 | - | ||
58339.26 | 17.14± 0.07 | - | -- | - | - | -- | - | - | 15.82± 0.07 | - | ||
58342.26 | 17.18± 0.04 | - | 18.17± 0.07 | - | -- | - | - | -- | - | - | ||
58366.11 | 17.18± 0.04 | - | 18.14± 0.07 | - | -- | - | - | -- | - | - | ||
58375.09 | 17.15± 0.05 | - | -- | - | - | 16.48± 0.04 | - | -- | - | - | ||
58403.06 | 17.16± 0.04 | - | -- | - | - | -- | - | - | 15.83± 0.05 | - | ||
58420.01 | 17.14± 0.06 | - | 18.07± 0.08 | - | -- | - | - | -- | - | - | ||
58433.09 | 17.18± 0.06 | - | 18.19± 0.06 | - | 16.51± 0.06 | - | -- | - | - | |||
58436.04 | 17.21± 0.04 | - | 18.16± 0.07 | - | 16.51± 0.04 | - | -- | - | - | |||
58671.29 | 17.16± 0.07 | - | 18.15± 0.07 | - | -- | - | - | -- | - | - | ||
58673.29 | 17.18± 0.08 | - | -- | - | - | 16.53± 0.07 | - | 15.84± 0.08 | - | |||
58696.30 | 17.17± 0.07 | - | 18.19± 0.07 | - | 16.49± 0.08 | - | -- | - | - | |||
58750.07 | 17.21± 0.07 | - | 18.17± 0.07 | - | -- | - | - | -- | - | - | ||
58779.05 | 17.21± 0.06 | - | -- | - | - | 16.53± 0.03 | - | -- | - | - | ||
58812.07 | 17.19± 0.08 | - | -- | - | - | 16.52± 0.08 | - | -- | - | - | ||
59000.39 | 17.20± 0.07 | - | -- | - | - | 16.71± 0.10 | X | -- | - | - | ||
59055.31 | 17.18± 0.07 | - | -- | - | - | 16.53± 0.08 | - | -- | - | - | ||
59077.20 | 17.13± 0.07 | - | 18.21± 0.07 | - | 16.48± 0.07 | - | 15.82± 0.10 | - | ||||
59131.09 | 17.16± 0.07 | - | -- | - | - | 16.51± 0.07 | - | -- | - | - | ||
59166.12 | 17.18± 0.07 | - | -- | - | - | -- | - | - | 15.92± 0.09 | - | ||
59194.11 | 17.18± 0.07 | - | 18.17± 0.07 | - | -- | - | - | -- | - | - | ||
59376.35 | 17.11± 0.07 | - | 18.18± 0.07 | - | -- | - | - | -- | - | - | ||
59409.37 | 17.09± 0.08 | - | -- | - | - | 16.46± 0.07 | - | -- | - | - | ||
59441.26 | 17.15± 0.07 | - | 18.16± 0.08 | - | -- | - | - | 15.86± 0.09 | - | |||
59467.11 | 17.04± 0.07 | - | -- | - | - | 16.41± 0.06 | - | -- | - | - | ||
59522.04 | 17.17± 0.07 | - | 18.20± 0.07 | - | -- | - | - | 15.88± 0.11 | - | |||
59546.05 | 17.14± 0.07 | - | -- | - | - | 16.49± 0.07 | - | -- | - | - | ||
59583.10 | 17.16± 0.07 | - | 18.22± 0.07 | - | -- | - | - | -- | - | - | ||
59739.36 | 17.13± 0.07 | - | 18.12± 0.08 | - | 16.48± 0.07 | - | -- | - | - | |||
59816.14 | 17.09± 0.07 | - | -- | - | - | -- | - | - | 15.76± 0.06 | - | ||
59851.09 | 17.17± 0.07 | - | 18.15± 0.08 | - | 16.50± 0.07 | - | -- | - | - | |||
59879.03 | 17.17± 0.07 | - | -- | - | - | -- | - | - | 15.87± 0.07 | - | ||
59905.07 | 17.18± 0.07 | - | 18.21± 0.07 | - | 16.52± 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 [0.24 mag] | B [0.23 mag] | R [0.26 mag] | |
---|---|---|---|
B [0.24 mag] | 0.31 (29) | ||
R [0.26 mag] | 0.73 (25) | 0.48 (14) | |
I [0.18 mag] | 0.60 (21) | 0.00 (7) | 0.05 (4) |
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) | 0.25 | 1.20 | ||
R (I|R) | 0.60 | 0.88 | -1.75 | 0.02 | |
I (I|R) | 0.38 | 0.97 | -0.01 | 1.61 | --- | ---- |
By John C. Martin, University of Illinois Springfield Henry R. Barber Research Observatory
Generated on 2023-08-14 14:15:12 UT-5