MJD | V | * | Image | B | * | Image | R | * | Images | I | * | Images |
---|---|---|---|---|---|---|---|---|---|---|---|---|
56140.37 | 16.29± 0.05 | b | -- | - | - | 16.09± 0.06 | b | -- | - | - | ||
56599.17 | 16.49± 0.05 | b | 16.52± 0.06 | b | 16.19± 0.05 | b | -- | - | - | |||
56976.16 | 16.28± 0.04 | b | 16.34± 0.06 | b | 16.01± 0.05 | b | -- | - | - | |||
56982.22 | 16.32± 0.06 | b | 16.35± 0.06 | b | 16.03± 0.07 | b | -- | - | - | |||
57038.13 | 16.34± 0.04 | b | 16.37± 0.05 | b | 16.07± 0.04 | b | -- | - | - | |||
57310.13 | 15.84± 0.05 | b | 15.93± 0.07 | b | 15.54± 0.04 | b | -- | - | - | |||
57328.19 | 15.88± 0.05 | b | 15.97± 0.07 | b | 15.62± 0.07 | b | -- | - | - | |||
57335.18 | 15.92± 0.06 | b | -- | - | - | 15.63± 0.04 | b | -- | - | - | ||
57401.10 | 15.94± 0.04 | b | 16.03± 0.05 | b | -- | - | - | -- | - | - | ||
57406.10 | 15.93± 0.04 | b | 16.05± 0.03 | b | 15.66± 0.04 | b | 15.50± 0.07 | b | ||||
57634.37 | 15.89± 0.05 | Ab | 15.97± 0.08 | Ab | 15.65± 0.07 | Ab | 15.58± 0.06 | b | ||||
57638.43 | 15.89± 0.06 | b | -- | - | - | -- | - | - | 15.50± 0.10 | b | ||
57687.13 | 15.75± 0.04 | b | 15.87± 0.06 | b | 15.52± 0.04 | b | 15.35± 0.06 | b | ||||
57964.33 | 16.11± 0.04 | b | 16.17± 0.07 | b | 15.85± 0.05 | b | 15.67± 0.06 | b | ||||
58045.16 | 16.06± 0.04 | Ab | 16.14± 0.07 | Ab | 15.84± 0.05 | Ab | -- | - | - | |||
58073.20 | 16.09± 0.04 | b | 16.21± 0.06 | Ab | -- | - | - | -- | - | - | ||
58103.16 | 16.17± 0.04 | Ab | -- | - | - | -- | - | - | 15.86± 0.06 | b | ||
58108.11 | 16.11± 0.05 | b | 16.17± 0.08 | b | -- | - | - | 15.77± 0.07 | b | |||
58312.39 | 16.12± 0.05 | b | 16.17± 0.07 | b | -- | - | - | -- | - | - | ||
58317.37 | 16.13± 0.04 | b | 16.19± 0.07 | b | 15.90± 0.04 | b | -- | - | - | |||
58341.34 | 15.95± 0.06 | b | -- | - | - | -- | - | - | 15.57± 0.07 | b | ||
58342.40 | 16.00± 0.05 | b | 16.08± 0.07 | b | 15.79± 0.05 | b | -- | - | - | |||
58375.14 | 16.09± 0.04 | b | -- | - | - | 15.84± 0.05 | b | -- | - | - | ||
58420.10 | 16.03± 0.04 | b | 16.08± 0.06 | b | -- | - | - | 15.63± 0.06 | b | |||
58433.00 | 15.98± 0.04 | b | -- | - | - | 15.74± 0.05 | b | 15.61± 0.06 | b | |||
58672.39 | 16.20± 0.07 | b | -- | - | - | 15.95± 0.05 | b | 15.91± 0.07 | b | |||
58695.36 | 16.19± 0.05 | b | 16.25± 0.05 | b | 15.97± 0.04 | b | -- | - | - | |||
58784.12 | 16.21± 0.05 | b | 16.30± 0.05 | b | -- | - | - | -- | - | - | ||
58812.22 | 16.15± 0.05 | b | -- | - | - | -- | - | - | 15.79± 0.05 | b | ||
58902.07 | 16.20± 0.04 | b | -- | - | - | 15.98± 0.04 | b | -- | - | - | ||
59059.38 | 16.44± 0.05 | b | 16.50± 0.05 | b | -- | - | - | -- | - | - | ||
59081.26 | 16.46± 0.05 | b | -- | - | - | 16.22± 0.05 | b | -- | - | - | ||
59084.34 | -- | - | - | -- | - | - | 16.24± 0.04 | Tb | -- | - | - | |
59161.07 | 16.66± 0.05 | b | 16.72± 0.06 | b | 16.39± 0.04 | b | -- | - | - | |||
59171.09 | 16.64± 0.05 | b | -- | - | - | -- | - | - | 16.33± 0.06 | b | ||
59227.08 | 16.78± 0.04 | b | 16.80± 0.04 | b | 16.50± 0.04 | b | -- | - | - | |||
59415.36 | 16.75± 0.04 | b | -- | - | - | 16.51± 0.04 | b | -- | - | - | ||
59441.39 | 16.80± 0.05 | b | 16.80± 0.06 | b | -- | - | - | -- | - | - | ||
59463.30 | 16.76± 0.04 | Ab | -- | - | - | -- | - | - | 16.57± 0.05 | b | ||
59523.15 | 16.78± 0.04 | b | -- | - | - | 16.56± 0.04 | b | -- | - | - | ||
59525.15 | 16.75± 0.04 | b | 16.75± 0.05 | b | -- | - | - | -- | - | - | ||
59546.15 | 16.79± 0.04 | b | -- | - | - | -- | - | - | 16.60± 0.05 | b | ||
59551.11 | 16.78± 0.04 | b | 16.77± 0.05 | b | -- | - | - | -- | - | - | ||
59583.15 | 16.76± 0.04 | b | -- | - | - | 16.54± 0.04 | b | -- | - | - | ||
59608.07 | 16.76± 0.04 | b | -- | - | - | -- | - | - | 16.60± 0.05 | 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 [0.94 mag] | B [1.05 mag] | R [1.04 mag] | |
---|---|---|---|
B [0.94 mag] | 1.00 (26) | ||
R [1.04 mag] | 0.99 (26) | 0.99 (16) | |
I [1.25 mag] | 0.99 (16) | 0.80 (6) | 0.92 (6) |
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) | 38.16 | 0.74 | ||
R (I|R) | 52.51 | 1.06 | 31.21 | 0.48 | |
I (I|R) | 59.45 | 1.04 | 3.54 | 0.80 | 8.20 | 1.26 |
By John C. Martin, University of Illinois Springfield Henry R. Barber Research Observatory
Generated on 2023-08-14 14:15:12 UT-5