MJD | V | * | Image | B | * | Image | R | * | Images | I | * | Images |
---|---|---|---|---|---|---|---|---|---|---|---|---|
56142.33 | 16.69± 0.06 | T | -- | - | - | -- | - | - | -- | - | - | |
56267.14 | -- | - | - | -- | - | - | 16.63± 0.05 | T | -- | - | - | |
56490.38 | 16.68± 0.04 | T | -- | - | - | -- | - | - | -- | - | - | |
56536.26 | 16.68± 0.05 | - | -- | - | - | 16.61± 0.06 | - | -- | - | - | ||
56537.20 | 16.68± 0.05 | - | 16.67± 0.07 | - | -- | - | - | -- | - | - | ||
56915.14 | 16.62± 0.03 | A | 16.61± 0.05 | A | 16.54± 0.04 | A | -- | - | - | |||
57227.33 | 16.68± 0.04 | A | 16.67± 0.04 | A | 16.60± 0.04 | A | -- | - | - | |||
57310.09 | 16.64± 0.03 | A | -- | - | - | -- | - | - | 16.44± 0.06 | A | ||
57633.28 | 16.66± 0.04 | - | 16.64± 0.04 | - | 16.55± 0.04 | - | -- | - | - | |||
57635.35 | 16.64± 0.05 | - | -- | - | - | -- | - | - | 16.49± 0.06 | - | ||
57638.27 | 16.68± 0.05 | - | -- | - | - | -- | - | - | 16.55± 0.04 | - | ||
57928.34 | 16.64± 0.04 | A | 16.62± 0.05 | A | 16.55± 0.05 | A | 16.43± 0.07 | A | ||||
57958.29 | 16.68± 0.04 | - | 16.68± 0.04 | - | -- | - | - | 16.56± 0.05 | - | |||
57963.25 | 16.66± 0.06 | T | -- | - | - | -- | - | - | -- | - | - | |
58035.03 | 16.62± 0.04 | - | -- | - | - | 16.52± 0.04 | - | -- | - | - | ||
58043.05 | 16.67± 0.04 | A | 16.66± 0.05 | A | 16.56± 0.04 | - | 16.58± 0.05 | - | ||||
58073.09 | 16.66± 0.06 | - | 16.59± 0.07 | - | -- | - | - | -- | - | - | ||
58098.09 | 16.71± 0.04 | - | 16.70± 0.04 | - | 16.62± 0.03 | A | -- | - | - | |||
58312.29 | 16.76± 0.04 | - | 16.78± 0.04 | - | 16.66± 0.04 | - | -- | - | - | |||
58316.26 | 16.68± 0.04 | - | -- | - | - | -- | - | - | 16.54± 0.04 | - | ||
58341.23 | 16.75± 0.05 | - | 16.77± 0.05 | - | -- | - | - | -- | - | - | ||
58366.12 | 16.68± 0.03 | - | 16.70± 0.04 | - | -- | - | - | -- | - | - | ||
58375.12 | 16.72± 0.04 | - | -- | - | - | 16.62± 0.03 | - | -- | - | - | ||
58403.08 | 16.73± 0.04 | - | -- | - | - | -- | - | - | 16.62± 0.06 | - | ||
58433.09 | 16.68± 0.06 | - | 16.65± 0.06 | - | 16.59± 0.06 | - | -- | - | - | |||
58671.29 | 16.72± 0.07 | - | 16.78± 0.06 | - | -- | - | - | -- | - | - | ||
58673.29 | 16.75± 0.08 | - | -- | - | - | 16.65± 0.07 | - | 16.58± 0.08 | - | |||
58696.30 | 16.67± 0.07 | - | 16.67± 0.07 | - | 16.59± 0.08 | - | -- | - | - | |||
58750.07 | 16.68± 0.07 | - | 16.70± 0.06 | - | -- | - | - | -- | - | - | ||
58779.05 | 16.70± 0.06 | - | -- | - | - | 16.64± 0.03 | - | -- | - | - | ||
58812.07 | 16.67± 0.08 | - | -- | - | - | 16.58± 0.08 | - | -- | - | - | ||
59000.39 | 16.64± 0.07 | - | -- | - | - | 16.58± 0.10 | - | -- | - | - | ||
59055.31 | 16.67± 0.07 | - | -- | - | - | 16.58± 0.08 | - | -- | - | - | ||
59077.20 | 16.70± 0.07 | - | 16.68± 0.07 | - | 16.61± 0.07 | - | 16.56± 0.10 | - | ||||
59131.09 | 16.71± 0.07 | - | -- | - | - | 16.61± 0.07 | - | -- | - | - | ||
59166.12 | 16.71± 0.07 | - | -- | - | - | -- | - | - | 16.55± 0.09 | - | ||
59194.11 | 16.68± 0.07 | - | 16.66± 0.07 | - | -- | - | - | -- | - | - | ||
59376.35 | 16.62± 0.07 | - | 16.66± 0.07 | - | -- | - | - | -- | - | - | ||
59409.37 | 16.72± 0.07 | - | -- | - | - | 16.62± 0.07 | - | -- | - | - | ||
59441.26 | 16.71± 0.07 | - | 16.72± 0.07 | - | -- | - | - | 16.65± 0.09 | - | |||
59467.11 | 16.70± 0.07 | - | -- | - | - | 16.57± 0.06 | - | -- | - | - | ||
59522.04 | 16.73± 0.07 | - | 16.72± 0.07 | - | -- | - | - | 16.53± 0.11 | - | |||
59546.05 | 16.68± 0.07 | - | -- | - | - | 16.60± 0.07 | - | -- | - | - | ||
59583.10 | 16.62± 0.07 | - | 16.63± 0.07 | - | -- | - | - | -- | - | - | ||
59739.36 | 16.68± 0.07 | - | 16.70± 0.07 | - | 16.59± 0.07 | - | -- | - | - | |||
59816.14 | 16.63± 0.06 | - | -- | - | - | -- | - | - | 16.39± 0.07 | - | ||
59851.09 | 16.69± 0.07 | - | 16.68± 0.07 | - | 16.57± 0.07 | - | -- | - | - | |||
59879.03 | 16.64± 0.07 | - | -- | - | - | -- | - | - | 16.60± 0.07 | - | ||
59905.07 | 16.69± 0.07 | - | 16.67± 0.06 | - | 16.62± 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 [0.20 mag] | B [0.14 mag] | R [0.14 mag] | |
---|---|---|---|
B [0.20 mag] | 0.74 (25) | ||
R [0.14 mag] | 0.75 (25) | 0.79 (13) | |
I [0.25 mag] | 0.40 (15) | 0.49 (6) | 0.33 (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) | 0.61 | 1.32 | ||
R (I|R) | 0.54 | 0.90 | 0.68 | 0.33 | |
I (I|R) | 0.54 | 0.69 | 0.36 | 0.75 | --- | ---- |
By John C. Martin, University of Illinois Springfield Henry R. Barber Research Observatory
Generated on 2023-08-14 14:15:12 UT-5