MJD | V | * | Image | B | * | Image | R | * | Images | I | * | Images |
---|---|---|---|---|---|---|---|---|---|---|---|---|
56142.33 | 17.14± 0.06 | Tb | -- | - | - | -- | - | - | -- | - | - | |
56267.14 | -- | - | - | -- | - | - | 16.56± 0.05 | Tb | -- | - | - | |
56490.38 | 17.06± 0.04 | Tb | -- | - | - | -- | - | - | -- | - | - | |
56536.26 | 16.99± 0.05 | b | -- | - | - | 16.52± 0.06 | b | -- | - | - | ||
56537.20 | 17.03± 0.05 | b | 17.91± 0.07 | b | -- | - | - | -- | - | - | ||
56599.08 | 16.93± 0.03 | b | 17.84± 0.06 | b | 16.43± 0.03 | b | -- | - | - | |||
56915.16 | 17.05± 0.03 | b | 17.99± 0.06 | b | 16.54± 0.04 | b | -- | - | - | |||
57227.34 | 16.95± 0.04 | b | 17.97± 0.05 | b | 16.41± 0.04 | b | -- | - | - | |||
57310.10 | 16.88± 0.03 | b | -- | - | - | -- | - | - | 16.09± 0.06 | b | ||
57633.33 | 17.00± 0.06 | b | 18.00± 0.07 | b | 16.51± 0.06 | b | -- | - | - | |||
57635.35 | 17.00± 0.05 | b | -- | - | - | -- | - | - | 16.12± 0.06 | b | ||
57887.90 | 16.92± 0.07 | b | 17.86± 0.18 | b | -- | - | - | -- | - | - | ||
57928.32 | 16.97± 0.04 | b | 17.86± 0.07 | b | 16.47± 0.06 | b | 16.12± 0.08 | b | ||||
57958.26 | 16.97± 0.06 | b | 17.86± 0.08 | b | -- | - | - | 16.08± 0.06 | - | |||
57963.26 | 16.97± 0.06 | b | 17.92± 0.07 | b | -- | - | - | -- | - | - | ||
57988.22 | 16.98± 0.07 | b | 17.90± 0.08 | b | -- | - | - | 16.07± 0.06 | b | |||
58035.03 | 16.92± 0.04 | b | -- | - | - | 16.47± 0.04 | b | -- | - | - | ||
58043.05 | 16.91± 0.05 | b | 17.78± 0.06 | b | 16.43± 0.04 | b | -- | - | - | |||
58045.05 | 16.91± 0.05 | b | -- | - | - | -- | - | - | 16.09± 0.06 | b | ||
58067.10 | 16.96± 0.05 | b | -- | - | - | -- | - | - | 16.07± 0.06 | b | ||
58073.09 | 16.97± 0.06 | b | 17.99± 0.08 | b | -- | - | - | -- | - | - | ||
58077.08 | 17.02± 0.07 | b | -- | - | - | -- | - | - | 16.06± 0.07 | b | ||
58098.07 | 17.07± 0.06 | b | 18.06± 0.07 | b | -- | - | - | -- | - | - | ||
58103.08 | 17.11± 0.05 | b | -- | - | - | -- | - | - | 16.18± 0.07 | b | ||
58312.26 | 17.06± 0.06 | b | 18.14± 0.08 | b | 16.54± 0.06 | b | -- | - | - | |||
58316.24 | 17.07± 0.06 | b | -- | - | - | -- | - | - | 16.15± 0.06 | b | ||
58339.26 | 16.96± 0.07 | b | -- | - | - | -- | - | - | 16.07± 0.07 | b | ||
58342.26 | 16.98± 0.04 | b | 17.95± 0.07 | b | -- | - | - | -- | - | - | ||
58366.11 | 16.88± 0.04 | b | 17.65± 0.06 | b | -- | - | - | -- | - | - | ||
58375.09 | 16.83± 0.05 | b | -- | - | - | 16.32± 0.04 | b | -- | - | - | ||
58403.06 | 16.88± 0.03 | b | -- | - | - | -- | - | - | 16.03± 0.05 | b | ||
58420.01 | 16.95± 0.06 | b | 17.84± 0.08 | b | -- | - | - | -- | - | - | ||
58436.04 | 16.97± 0.04 | b | 17.95± 0.06 | b | 16.44± 0.04 | b | -- | - | - | |||
58671.29 | 16.75± 0.07 | b | 17.60± 0.06 | b | -- | - | - | -- | - | - | ||
58673.29 | 16.76± 0.08 | b | -- | - | - | 16.27± 0.07 | b | 15.86± 0.08 | b | |||
58696.30 | 16.87± 0.07 | b | 17.78± 0.07 | b | 16.35± 0.08 | b | -- | - | - | |||
58779.05 | 17.02± 0.06 | b | -- | - | - | 16.52± 0.03 | b | -- | - | - | ||
58812.07 | 16.87± 0.08 | b | -- | - | - | 16.39± 0.08 | b | -- | - | - | ||
59000.38 | 17.06± 0.06 | Ab | -- | - | - | 16.56± 0.08 | Ab | -- | - | - | ||
59055.31 | 16.86± 0.07 | b | -- | - | - | 16.39± 0.08 | b | -- | - | - | ||
59077.20 | 16.85± 0.07 | b | 17.76± 0.07 | b | 16.40± 0.07 | b | 16.01± 0.10 | b | ||||
59131.09 | 16.91± 0.07 | b | -- | - | - | 16.44± 0.07 | b | -- | - | - | ||
59166.12 | 16.94± 0.07 | b | -- | - | - | -- | - | - | 16.05± 0.09 | b | ||
59194.11 | 17.04± 0.07 | b | 17.94± 0.07 | b | -- | - | - | -- | - | - | ||
59376.35 | 16.93± 0.07 | b | 17.79± 0.07 | b | -- | - | - | -- | - | - | ||
59409.37 | 16.93± 0.07 | b | -- | - | - | 16.43± 0.07 | b | -- | - | - | ||
59441.26 | 17.12± 0.07 | b | 18.13± 0.08 | b | -- | - | - | 16.20± 0.09 | b | |||
59467.11 | 17.06± 0.07 | b | -- | - | - | 16.64± 0.06 | b | -- | - | - | ||
59522.04 | 16.80± 0.07 | b | 17.70± 0.07 | b | -- | - | - | 15.91± 0.11 | b | |||
59546.05 | 16.90± 0.07 | b | -- | - | - | 16.41± 0.07 | b | -- | - | - | ||
59583.10 | 16.96± 0.07 | b | 17.91± 0.07 | b | -- | - | - | -- | - | - | ||
59739.36 | 16.75± 0.07 | b | 17.58± 0.07 | b | 16.32± 0.07 | b | -- | - | - | |||
59816.14 | 16.97± 0.07 | b | -- | - | - | -- | - | - | 16.06± 0.07 | b | ||
59851.09 | 16.92± 0.07 | b | 17.81± 0.07 | b | 16.47± 0.07 | b | -- | - | - | |||
59879.03 | 16.93± 0.07 | b | -- | - | - | -- | - | - | 16.04± 0.07 | b | ||
59905.07 | 16.90± 0.07 | b | 17.77± 0.07 | b | 16.40± 0.07 | b | -- | - | - |
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 [0.56 mag] | B [0.40 mag] | R [0.37 mag] | |
---|---|---|---|
B [0.56 mag] | 0.86 (29) | ||
R [0.37 mag] | 0.88 (25) | 0.70 (13) | |
I [0.34 mag] | 0.79 (19) | 0.82 (6) | 1.00 (3) |
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) | 2.52 | 1.42 | ||
R (I|R) | 1.82 | 1.02 | -1.26 | 0.06 | |
I (I|R) | 1.26 | 1.80 | 1.63 | 1.83 | --- | ---- |
By John C. Martin, University of Illinois Springfield Henry R. Barber Research Observatory
Generated on 2023-08-14 14:15:12 UT-5