MJD | V | * | Image | B | * | Image | R | * | Images | I | * | Images |
---|---|---|---|---|---|---|---|---|---|---|---|---|
56140.38 | 16.32± 0.04 | A | -- | - | - | 15.98± 0.07 | A | -- | - | - | ||
56593.16 | 16.36± 0.03 | - | 16.88± 0.02 | - | -- | - | - | -- | - | - | ||
56599.18 | 16.39± 0.04 | A | 16.89± 0.05 | A | 15.99± 0.05 | A | -- | - | - | |||
56976.18 | 16.34± 0.04 | A | 16.84± 0.05 | A | 15.96± 0.06 | A | -- | - | - | |||
57038.13 | 16.53± 0.04 | - | 16.96± 0.05 | - | 16.16± 0.04 | - | -- | - | - | |||
57310.13 | 16.41± 0.05 | X | 16.83± 0.07 | - | 16.07± 0.05 | - | -- | - | - | |||
57335.18 | 16.46± 0.06 | - | -- | - | - | 16.06± 0.04 | - | -- | - | - | ||
57401.10 | 16.46± 0.04 | - | 16.89± 0.05 | - | -- | - | - | -- | - | - | ||
57406.10 | 16.49± 0.04 | - | 16.99± 0.04 | - | 16.15± 0.05 | - | 15.89± 0.07 | - | ||||
57634.34 | 16.55± 0.04 | - | 16.91± 0.07 | - | 16.18± 0.05 | - | 15.93± 0.06 | - | ||||
57638.35 | 16.71± 0.03 | - | 17.10± 0.06 | - | 16.37± 0.05 | - | 16.06± 0.07 | - | ||||
57687.13 | 16.56± 0.04 | - | 16.98± 0.06 | - | 16.25± 0.04 | - | 15.96± 0.06 | - | ||||
57964.37 | 16.60± 0.04 | - | 16.99± 0.06 | - | 16.26± 0.04 | - | 15.98± 0.06 | - | ||||
57988.41 | 16.63± 0.04 | - | 17.04± 0.04 | - | -- | - | - | -- | - | - | ||
58043.10 | 16.67± 0.04 | - | -- | - | - | 16.30± 0.04 | - | 15.98± 0.06 | - | |||
58045.15 | 16.68± 0.04 | - | 17.07± 0.07 | - | 16.38± 0.04 | - | -- | - | - | |||
58073.18 | 16.67± 0.03 | - | 17.09± 0.06 | - | -- | - | - | -- | - | - | ||
58103.16 | 16.66± 0.04 | A | 17.06± 0.04 | - | -- | - | - | 16.10± 0.06 | - | |||
58108.14 | 16.66± 0.05 | - | 17.06± 0.06 | - | -- | - | - | 15.99± 0.08 | - | |||
58316.38 | 16.70± 0.03 | - | 17.09± 0.05 | - | 16.37± 0.03 | - | 16.07± 0.04 | - | ||||
58317.39 | 16.72± 0.04 | - | -- | - | - | 16.41± 0.07 | - | -- | - | - | ||
58341.40 | 16.70± 0.05 | - | 17.10± 0.08 | - | 16.38± 0.07 | - | 16.06± 0.10 | - | ||||
58342.36 | 16.68± 0.03 | - | 17.10± 0.06 | - | 16.36± 0.03 | - | 16.03± 0.06 | - | ||||
58403.15 | 16.61± 0.04 | - | -- | - | - | -- | - | - | 16.05± 0.09 | - | ||
58420.06 | 16.69± 0.04 | - | 17.08± 0.06 | - | 16.37± 0.04 | - | 16.10± 0.06 | - | ||||
58433.00 | 16.70± 0.04 | - | -- | - | - | 16.36± 0.05 | - | 16.07± 0.06 | - | |||
58696.39 | 16.73± 0.04 | - | 17.08± 0.06 | - | 16.41± 0.04 | - | -- | - | - | |||
58779.15 | 16.61± 0.04 | - | -- | - | - | 16.29± 0.05 | - | 16.01± 0.07 | - | |||
58812.22 | 16.74± 0.05 | - | -- | - | - | -- | - | - | 16.17± 0.05 | - | ||
58902.06 | 16.79± 0.03 | A | -- | - | - | 16.44± 0.04 | - | 16.23± 0.07 | - | |||
59056.38 | 16.83± 0.04 | - | 17.20± 0.06 | - | 16.45± 0.04 | - | 16.20± 0.07 | - | ||||
59081.33 | 16.80± 0.03 | - | 17.17± 0.06 | - | 16.45± 0.03 | - | -- | - | - | |||
59082.34 | 16.81± 0.03 | A | 17.19± 0.05 | A | 16.46± 0.05 | A | -- | - | - | |||
59084.29 | -- | - | - | -- | - | - | 16.42± 0.05 | T | -- | - | - | |
59161.09 | 16.88± 0.04 | A | 17.29± 0.05 | A | 16.53± 0.04 | A | -- | - | - | |||
59171.09 | 16.84± 0.04 | A | 17.25± 0.05 | A | 16.44± 0.05 | - | 16.24± 0.07 | A | ||||
59227.08 | 16.84± 0.03 | A | 17.23± 0.04 | A | 16.52± 0.05 | A | -- | - | - | |||
59415.37 | 16.86± 0.04 | A | 17.31± 0.03 | - | 16.49± 0.04 | - | -- | - | - | |||
59441.40 | 16.84± 0.05 | A | 17.20± 0.06 | - | 16.52± 0.05 | - | 16.23± 0.07 | - | ||||
59442.39 | 16.86± 0.02 | - | -- | - | - | 16.53± 0.05 | - | 16.23± 0.07 | - | |||
59463.28 | 16.82± 0.04 | A | 17.19± 0.06 | - | -- | - | - | 16.24± 0.05 | - | |||
59523.16 | 16.80± 0.03 | A | 17.23± 0.03 | - | 16.46± 0.04 | - | -- | - | - | |||
59525.15 | 16.78± 0.03 | A | 17.14± 0.04 | - | 16.44± 0.05 | - | 16.21± 0.09 | - | ||||
59546.18 | 16.81± 0.03 | A | 17.15± 0.06 | - | 16.50± 0.04 | - | 16.22± 0.05 | - | ||||
59551.12 | 16.83± 0.04 | A | 17.20± 0.04 | A | -- | - | - | 16.21± 0.08 | - | |||
59583.16 | 16.83± 0.03 | A | 17.20± 0.06 | - | 16.51± 0.04 | - | 16.21± 0.08 | - | ||||
59608.09 | 16.80± 0.04 | A | -- | - | - | 16.52± 0.05 | A | 16.22± 0.05 | - |
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 [0.47 mag] | B [0.57 mag] | R [0.58 mag] | |
---|---|---|---|
B [0.47 mag] | 0.94 (34) | ||
R [0.58 mag] | 0.97 (35) | 0.88 (27) | |
I [0.35 mag] | 0.91 (27) | 0.86 (19) | 0.91 (21) |
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) | 11.28 | 0.71 | ||
R (I|R) | 12.08 | 1.17 | 12.27 | 0.13 | |
I (I|R) | 4.27 | 1.53 | 2.71 | 0.87 | 4.02 | 1.23 |
By John C. Martin, University of Illinois Springfield Henry R. Barber Research Observatory
Generated on 2023-08-14 14:15:12 UT-5