| MJD | V | * | Image | B | * | Image | R | * | Images | I | * | Images | 
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 56140.40 | 16.87± 0.05 | b |  | -- | - | - | 16.54± 0.07 | b |  | -- | - | - | 
| 56593.16 | 16.76± 0.03 | b |  | 17.02± 0.03 | b |  | -- | - | - | -- | - | - | 
| 56599.21 | 16.80± 0.05 | Ab |   | 17.00± 0.04 | Ab |   | 16.55± 0.06 | Ab |   | -- | - | - | 
| 56976.19 | 16.79± 0.04 | b |  | 16.99± 0.04 | b |  | 16.54± 0.07 | b |  | -- | - | - | 
| 56982.22 | 16.80± 0.06 | b |  | 17.02± 0.06 | b |  | 16.54± 0.07 | b |  | -- | - | - | 
| 57035.14 | 16.79± 0.04 | b |  | 17.18± 0.04 | b |  | 16.51± 0.05 | b |  | -- | - | - | 
| 57310.16 | 16.80± 0.05 | b |  | 16.93± 0.04 | b |  | 16.52± 0.05 | b |  | -- | - | - | 
| 57328.17 | 16.84± 0.04 | Ab |   | 17.06± 0.05 | Ab |   | 16.57± 0.05 | Ab |   | -- | - | - | 
| 57406.10 | 16.80± 0.05 | b |  | 16.96± 0.04 | b |  | 16.44± 0.05 | b |  | 16.18± 0.07 | b |  | 
| 57634.39 | 16.71± 0.05 | Ab |   | 16.95± 0.07 | Ab |   | 16.47± 0.07 | Ab |   | -- | - | - | 
| 57638.40 | 16.74± 0.05 | Ab |   | 16.98± 0.04 | b |  | 16.49± 0.03 | b |  | 16.23± 0.08 | Ab |   | 
| 57964.40 | 16.79± 0.04 | b |  | -- | - | - | -- | - | - | 16.27± 0.07 | Ab |   | 
| 57988.43 | 16.68± 0.06 | Tb |  | -- | - | - | -- | - | - | -- | - | - | 
| 58043.13 | 16.76± 0.03 | b |  | 17.00± 0.04 | b |  | 16.43± 0.07 | b |  | -- | - | - | 
| 58073.22 | 16.78± 0.04 | b |  | 16.95± 0.04 | X |  | -- | - | - | -- | - | - | 
| 58108.13 | 16.83± 0.05 | Ab |   | 17.04± 0.04 | Ab |   | -- | - | - | 16.36± 0.08 | Ab |   | 
| 58316.35 | 16.89± 0.04 | b |  | 17.19± 0.04 | b |  | -- | - | - | -- | - | - | 
| 58339.40 | 16.80± 0.05 | b |  | 17.01± 0.06 | b |  | 16.53± 0.06 | b |  | -- | - | - | 
| 58341.37 | 16.91± 0.04 | b |  | -- | - | - | -- | - | - | 16.40± 0.08 | b |  | 
| 58373.15 | 16.81± 0.06 | b |  | 17.09± 0.06 | b |  | -- | - | - | -- | - | - | 
| 58375.16 | 16.70± 0.04 | b |  | -- | - | - | -- | - | - | 16.21± 0.09 | b |  | 
| 58433.02 | 16.85± 0.05 | b |  | -- | - | - | 16.61± 0.05 | b |  | 16.31± 0.10 | b |  | 
| 58673.38 | 16.84± 0.03 | b |  | 17.12± 0.03 | b |  | -- | - | - | -- | - | - | 
| 58695.39 | 16.77± 0.05 | b |  | -- | - | - | 16.55± 0.04 | b |  | -- | - | - | 
| 58696.41 | 16.83± 0.05 | b |  | 17.05± 0.07 | b |  | 16.55± 0.07 | b |   | -- | - | - | 
| 58750.20 | 16.76± 0.04 | Ab |   | 17.04± 0.03 | b |  | 16.47± 0.05 | b |  | 16.33± 0.08 | b |  | 
| 58757.17 | 16.73± 0.05 | b |  | -- | - | - | 16.52± 0.05 | b |  | -- | - | - | 
| 58779.18 | 16.71± 0.04 | b |  | 17.00± 0.03 | b |  | -- | - | - | -- | - | - | 
| 58784.14 | 16.77± 0.04 | Ab |   | -- | - | - | 16.53± 0.04 | b |  | 16.28± 0.08 | b |  | 
| 58812.20 | 16.80± 0.06 | b |  | -- | - | - | 16.53± 0.06 | b |  | -- | - | - | 
| 59059.40 | 16.82± 0.06 | b |  | -- | - | - | 16.57± 0.05 | b |  | 16.27± 0.08 | b |  | 
| 59081.34 | 16.81± 0.05 | Ab |   | 17.00± 0.04 | Ab |   | 16.57± 0.05 | Ab |   | 16.30± 0.07 | b |  | 
| 59082.35 | 16.78± 0.04 | Ab |   | 17.05± 0.03 | Ab |     | 16.55± 0.04 | Ab |     | -- | - | - | 
| 59084.25 | -- | - | - | -- | - | - | 16.56± 0.04 | Tb |  | -- | - | - | 
| 59161.12 | 16.65± 0.03 | Ab |   | 16.89± 0.02 | b |  | 16.42± 0.04 | Ab |   | 16.26± 0.09 | b |  | 
| 59171.14 | 16.68± 0.04 | Ab |    | 16.91± 0.05 | Ab |    | 16.45± 0.05 | b |  | 16.20± 0.07 | Ab |    | 
| 59227.13 | 16.68± 0.04 | Ab |    | 16.91± 0.04 | Ab |    | 16.47± 0.04 | Ab |   | 16.17± 0.07 | -b |  | 
| 59415.38 | 16.72± 0.05 | Ab |   | 16.98± 0.03 | b |  | -- | - | - | -- | - | - | 
| 59441.42 | 16.70± 0.06 | Tb |  | -- | - | - | -- | - | - | -- | - | - | 
| 59442.40 | 16.67± 0.04 | Ab |   | -- | - | - | 16.44± 0.04 | Ab |   | 16.15± 0.07 | b |  | 
| 59463.33 | 16.72± 0.05 | Ab |   | 16.93± 0.06 | Ab |   | -- | - | - | 16.28± 0.07 | b |  | 
| 59522.13 | 16.74± 0.05 | b |  | -- | - | - | 16.52± 0.05 | b |  | 16.25± 0.08 | b |  | 
| 59523.17 | 16.72± 0.02 | b |  | 16.97± 0.03 | b |  | -- | - | - | -- | - | - | 
| 59525.15 | 16.73± 0.04 | Ab |   | -- | - | - | 16.49± 0.04 | b |  | 16.19± 0.09 | b |  | 
| 59546.19 | 16.74± 0.04 | Ab |    | 16.97± 0.02 | b |  | 16.47± 0.04 | b |  | 16.23± 0.07 | b |  | 
| 59551.14 | 16.71± 0.05 | Ab |    | 16.93± 0.03 | b |  | -- | - | - | 16.20± 0.08 | b |  | 
| 59583.18 | 16.72± 0.03 | Ab |   | -- | - | - | 16.50± 0.05 | b |  | 16.21± 0.08 | b |  | 
| 59608.12 | 16.75± 0.04 | Ab |   | 17.02± 0.07 | b |  | 16.51± 0.05 | Ab |   | -- | - | - | 
| 59794.39 | 16.77± 0.04 | Ab |   | 17.00± 0.03 | b |  | 16.57± 0.04 | b |  | -- | - | - | 
| 59849.18 | 16.75± 0.05 | Ab |    | 17.01± 0.03 | b |  | 16.51± 0.05 | Ab |   | -- | - | - | 
| 59851.17 | 16.74± 0.04 | Ab |   | 16.92± 0.04 | b |  | -- | - | - | 16.26± 0.08 | Ab |   | 
| 59854.21 | 16.75± 0.04 | Ab |   | 16.96± 0.02 | b |  | 16.55± 0.04 | b |  | 16.27± 0.08 | b |  | 
| 59879.17 | 16.68± 0.03 | Ab |   | 16.95± 0.03 | Ab |   | 16.49± 0.05 | b |  | -- | - | - | 
| 59903.24 | 16.73± 0.03 | Ab |   | 16.96± 0.04 | Ab |   | 16.47± 0.05 | Ab |   | 16.24± 0.08 | Ab |   | 
| 59904.15 | 16.75± 0.04 | b |  | 17.01± 0.03 | b |    | 16.52± 0.04 | b |    | 16.29± 0.08 | b |    | 
| 59932.18 | 16.67± 0.04 | Ab |    | 16.93± 0.03 | b |  | 16.40± 0.05 | b |  | 16.13± 0.08 | b |  | 
| 60172.40 | 16.67± 0.04 | Ab |   | 16.93± 0.03 | b |  | 16.41± 0.04 | b |  | -- | - | - | 
| 60205.18 | 16.72± 0.04 | Ab |   | 16.97± 0.04 | Ab |   | -- | - | - | -- | - | - | 
| 60227.15 | 16.66± 0.04 | b |  | -- | - | - | 16.40± 0.06 | b |  | -- | - | - | 
| 60261.15 | 16.63± 0.04 | Ab |    | -- | - | - | 16.38± 0.05 | A |   | 16.14± 0.08 | Ab |   | 
| 60262.17 | 16.64± 0.04 | Ab |   | 16.91± 0.03 | Ab |   | 16.45± 0.05 | b |    | 16.13± 0.09 | b |    | 
| 60290.21 | 16.65± 0.04 | Ab |    | 16.90± 0.04 | Ab |    | 16.42± 0.06 | b |  | 16.13± 0.09 | Ab |   | 
| 60292.22 | 16.64± 0.05 | Ab |    | -- | - | - | 16.39± 0.05 | Ab |   | 16.08± 0.09 | b |  | 
| 60342.11 | 16.60± 0.04 | Ab |   | 16.84± 0.03 | b |  | 16.39± 0.05 | b |  | -- | - | - | 
| 60506.35 | 16.70± 0.04 | Ab |   | 16.96± 0.03 | b |  | 16.48± 0.04 | b |  | -- | - | - | 
| 60529.40 | 16.71± 0.04 | b |  | 16.91± 0.07 | b |  | 16.46± 0.05 | b |  | -- | - | - | 
| 60533.41 | 16.67± 0.06 | b |  | 16.92± 0.03 | b |  | -- | - | - | 16.24± 0.08 | b |  | 
| 60556.30 | 16.66± 0.04 | Ab |   | 16.92± 0.02 | b |  | -- | - | - | 16.20± 0.08 | b |  | 
| 60562.27 | 16.68± 0.05 | b |  | 16.91± 0.03 | b |  | -- | - | - | 16.24± 0.08 | b |  | 
| 60592.13 | 16.64± 0.05 | Ab |   | 16.91± 0.05 | Ab |   | 16.40± 0.05 | Ab |   | -- | - | - | 
| 60594.12 | 16.59± 0.03 | b |  | -- | - | - | 16.36± 0.05 | b |  | 16.13± 0.08 | b |  | 
| 60612.16 | 16.62± 0.04 | Ab |   | 16.86± 0.02 | b |  | -- | - | - | 16.15± 0.07 | b |  | 
| 60651.19 | 16.66± 0.05 | Ab |    | 16.93± 0.03 | b |  | 16.42± 0.05 | b |  | 16.10± 0.09 | 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 [0.32 mag] | B [0.35 mag] | R [0.25 mag] | |
|---|---|---|---|
| B [0.35 mag] | 0.69 (51) | ||
| R [0.25 mag] | 0.74 (50) | 0.44 (35) | |
| I [0.31 mag] | 0.68 (36) | 0.49 (23) | 0.62 (25) | 
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) | 2.89 | 1.18 | ||
| R (I|R) | 1.63 | 1.30 | 0.11 | 0.14 | |
| I (I|R) | 1.26 | 1.86 | 0.87 | 1.67 | 0.85 | 1.44 | 
By John C. Martin, University of Illinois Springfield Henry R. Barber Research Observatory
Generated on 2025-08-04 15:53:14 UT-5