MJD | V | * | Image | B | * | Image | R | * | Images | I | * | Images |
---|---|---|---|---|---|---|---|---|---|---|---|---|
56140.38 | 16.80± 0.04 | AB | -- | - | - | 16.33± 0.08 | AB | -- | - | - | ||
56593.16 | 16.87± 0.03 | B | 17.64± 0.03 | B | -- | - | - | -- | - | - | ||
56599.18 | 16.87± 0.04 | AB | 17.62± 0.05 | AB | 16.37± 0.05 | AB | -- | - | - | |||
56976.18 | 16.64± 0.04 | AB | 17.49± 0.05 | AB | 16.18± 0.06 | AB | -- | - | - | |||
57038.13 | 16.72± 0.04 | B | 17.35± 0.05 | B | 16.28± 0.04 | B | -- | - | - | |||
57310.13 | 16.85± 0.05 | B | 17.54± 0.07 | B | 16.33± 0.05 | B | -- | - | - | |||
57328.16 | 16.93± 0.03 | B | 17.72± 0.04 | B | 16.43± 0.04 | B | -- | - | - | |||
57335.18 | 16.93± 0.06 | B | -- | - | - | 16.36± 0.04 | B | -- | - | - | ||
57401.10 | 16.81± 0.04 | B | 17.55± 0.06 | B | -- | - | - | -- | - | - | ||
57406.10 | 16.79± 0.04 | B | 17.59± 0.07 | B | 16.32± 0.05 | B | 15.98± 0.07 | B | ||||
57634.35 | 16.93± 0.04 | AB | 17.72± 0.06 | AB | 16.41± 0.06 | AB | 16.10± 0.06 | B | ||||
57687.13 | 16.84± 0.04 | B | 17.63± 0.06 | B | 16.44± 0.04 | B | 16.11± 0.06 | B | ||||
57964.35 | 16.82± 0.04 | AB | 17.58± 0.07 | AB | 16.32± 0.05 | AB | 16.05± 0.06 | AB | ||||
57988.41 | 16.89± 0.04 | B | 17.67± 0.04 | B | -- | - | - | -- | - | - | ||
58043.10 | 16.95± 0.04 | B | -- | - | - | 16.45± 0.04 | B | 16.10± 0.06 | B | |||
58045.16 | 16.90± 0.05 | AB | 17.68± 0.07 | AB | 16.41± 0.05 | AB | -- | - | - | |||
58073.19 | 16.89± 0.04 | AB | 17.72± 0.07 | AB | -- | - | - | -- | - | - | ||
58103.16 | 16.86± 0.04 | AB | 17.76± 0.04 | B | -- | - | - | 16.11± 0.06 | B | |||
58108.13 | 16.93± 0.05 | AB | 17.75± 0.07 | AB | -- | - | - | 16.11± 0.07 | AB | |||
58312.39 | 16.80± 0.05 | B | 17.59± 0.09 | B | -- | - | - | -- | - | - | ||
58316.38 | 16.81± 0.03 | B | 17.58± 0.05 | B | 16.34± 0.03 | B | 16.02± 0.04 | B | ||||
58317.37 | 16.86± 0.04 | AB | 17.57± 0.07 | B | 16.33± 0.04 | B | -- | - | - | |||
58341.38 | 16.93± 0.06 | AB | 17.79± 0.08 | B | 16.50± 0.07 | B | 16.13± 0.09 | AB | ||||
58342.38 | 16.81± 0.04 | AB | 17.59± 0.07 | AB | 16.32± 0.04 | AB | 15.98± 0.06 | B | ||||
58375.14 | 16.84± 0.05 | B | -- | - | - | 16.35± 0.05 | B | -- | - | - | ||
58420.07 | 16.81± 0.04 | AB | 17.60± 0.06 | B | 16.35± 0.04 | B | 16.05± 0.06 | AB | ||||
58433.00 | 16.88± 0.05 | B | -- | - | - | 16.39± 0.05 | B | 16.10± 0.06 | B | |||
58673.38 | 16.85± 0.03 | B | 17.71± 0.04 | B | -- | - | - | -- | - | - | ||
58695.36 | 16.87± 0.05 | B | 17.62± 0.06 | B | 16.40± 0.04 | B | -- | - | - | |||
58696.39 | 16.83± 0.04 | B | 17.66± 0.06 | B | 16.35± 0.04 | B | -- | - | - | |||
58750.19 | 17.04± 0.03 | B | -- | - | - | 16.50± 0.05 | B | -- | - | - | ||
58784.12 | 17.00± 0.05 | B | 17.76± 0.06 | B | -- | - | - | -- | - | - | ||
58812.22 | 16.87± 0.05 | B | -- | - | - | -- | - | - | 16.13± 0.05 | B | ||
58902.06 | 16.74± 0.03 | AB | -- | - | - | 16.34± 0.04 | B | 15.91± 0.07 | B | |||
59056.38 | 16.93± 0.04 | B | 17.84± 0.06 | B | 16.44± 0.04 | B | 16.08± 0.07 | B | ||||
59059.38 | 16.92± 0.05 | B | 17.76± 0.06 | B | -- | - | - | -- | - | - | ||
59081.30 | 16.88± 0.04 | AB | 17.67± 0.06 | B | 16.38± 0.04 | AB | -- | - | - | |||
59082.34 | 16.87± 0.03 | AB | 17.69± 0.05 | AB | 16.34± 0.05 | AB | -- | - | - | |||
59084.29 | -- | - | - | -- | - | - | 16.31± 0.05 | TB | -- | - | - | |
59161.09 | 16.87± 0.04 | AB | 17.66± 0.05 | AB | 16.40± 0.04 | AB | -- | - | - | |||
59171.09 | 16.88± 0.04 | AB | 17.68± 0.05 | AB | 16.38± 0.05 | B | 16.10± 0.07 | AB | ||||
59227.08 | 16.98± 0.03 | AB | 17.82± 0.05 | AB | 16.48± 0.05 | AB | -- | - | - | |||
59415.37 | 16.94± 0.04 | AB | 17.77± 0.05 | B | 16.45± 0.04 | B | -- | - | - | |||
59441.40 | 16.92± 0.05 | AB | 17.77± 0.06 | B | 16.39± 0.05 | B | 16.00± 0.07 | B | ||||
59442.39 | 16.98± 0.02 | B | -- | - | - | 16.39± 0.05 | B | 16.09± 0.07 | B | |||
59463.28 | 16.96± 0.04 | AB | 17.76± 0.06 | B | -- | - | - | 16.16± 0.05 | B | |||
59523.16 | 17.05± 0.03 | AB | 17.89± 0.03 | B | 16.52± 0.04 | B | -- | - | - | |||
59525.15 | 17.02± 0.03 | AB | 17.88± 0.05 | B | 16.45± 0.05 | B | 16.18± 0.09 | B | ||||
59546.18 | 17.02± 0.04 | AB | 17.74± 0.06 | B | 16.55± 0.04 | B | 16.21± 0.05 | B | ||||
59551.12 | 17.00± 0.04 | AB | 17.85± 0.05 | AB | -- | - | - | 16.06± 0.08 | - | |||
59583.16 | 16.93± 0.03 | AB | 17.65± 0.07 | B | 16.47± 0.04 | B | 16.11± 0.08 | B | ||||
59608.09 | 16.91± 0.04 | AB | -- | - | - | 16.41± 0.05 | AB | 16.11± 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 [0.54 mag] | B [0.40 mag] | R [0.37 mag] | |
---|---|---|---|
B [0.54 mag] | 0.76 (41) | ||
R [0.37 mag] | 0.80 (38) | 0.62 (29) | |
I [0.29 mag] | 0.56 (24) | 0.30 (18) | 0.67 (19) |
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) | 3.99 | 1.04 | ||
R (I|R) | 3.23 | 1.49 | 10.14 | 0.06 | |
I (I|R) | 1.72 | 2.06 | 0.94 | 1.66 | 1.41 | 1.29 |
By John C. Martin, University of Illinois Springfield Henry R. Barber Research Observatory
Generated on 2023-08-14 14:15:12 UT-5