Not resolved from LGGS star J004507.64+413740.4 less than 0.5 arcseconds W. According to LGGS it has odd colors with comparable brightness in B and R but contributes -0.07 magntudes in V.
MJD | V | * | Image | B | * | Image | R | * | Images | I | * | Images |
---|---|---|---|---|---|---|---|---|---|---|---|---|
56142.32 | 16.21± 0.04 | Tb | -- | - | - | -- | - | - | -- | - | - | |
56267.15 | -- | - | - | -- | - | - | 15.91± 0.03 | TB | -- | - | - | |
56490.37 | 16.22± 0.04 | b | 16.50± 0.05 | B | -- | - | - | -- | - | - | ||
56536.24 | 16.14± 0.04 | b | -- | - | - | 15.90± 0.04 | B | -- | - | - | ||
56915.13 | 16.15± 0.03 | b | 16.44± 0.04 | B | 15.92± 0.04 | B | -- | - | - | |||
57227.31 | 16.11± 0.04 | b | 16.43± 0.04 | B | 15.87± 0.04 | B | -- | - | - | |||
57310.08 | 16.16± 0.03 | b | -- | - | - | -- | - | - | 15.70± 0.05 | B | ||
57633.32 | 16.12± 0.04 | Ab | 16.41± 0.05 | AB | 15.89± 0.04 | AB | -- | - | - | |||
57638.28 | 16.07± 0.04 | Ab | -- | - | - | -- | - | - | 15.62± 0.05 | AB | ||
57928.37 | 16.09± 0.03 | b | 16.37± 0.04 | B | 15.85± 0.04 | B | 15.62± 0.06 | B | ||||
57958.29 | 16.14± 0.04 | b | 16.43± 0.04 | B | -- | - | - | 15.65± 0.04 | B | |||
58043.06 | 16.25± 0.04 | b | 16.55± 0.04 | B | -- | - | - | 15.80± 0.05 | B | |||
58098.09 | 16.18± 0.04 | b | 16.47± 0.04 | B | 15.95± 0.03 | AB | -- | - | - | |||
58312.29 | 16.16± 0.04 | b | 16.47± 0.04 | B | 15.93± 0.04 | B | -- | - | - | |||
58316.26 | 16.16± 0.04 | b | -- | - | - | -- | - | - | 15.67± 0.04 | B | ||
58341.23 | 16.13± 0.05 | b | 16.43± 0.05 | B | -- | - | - | -- | - | - | ||
58366.12 | 16.18± 0.03 | b | 16.47± 0.04 | B | -- | - | - | -- | - | - | ||
58375.12 | 16.21± 0.03 | b | -- | - | - | 15.96± 0.03 | B | -- | - | - | ||
58403.08 | 16.21± 0.04 | b | -- | - | - | -- | - | - | 15.77± 0.05 | B | ||
58671.38 | 16.17± 0.04 | b | 16.48± 0.03 | B | -- | - | - | -- | - | - | ||
58695.34 | 16.16± 0.05 | b | -- | - | - | 15.94± 0.04 | B | 15.75± 0.04 | B | |||
58750.13 | 16.16± 0.04 | b | 16.44± 0.03 | B | -- | - | - | -- | - | - | ||
58779.10 | 16.24± 0.04 | b | -- | - | - | 15.98± 0.03 | B | -- | - | - | ||
58812.08 | 16.11± 0.04 | b | -- | - | - | -- | - | - | 15.65± 0.04 | B | ||
59001.39 | 16.29± 0.03 | b | -- | - | - | 16.04± 0.04 | B | -- | - | - | ||
59059.31 | 16.19± 0.03 | b | 16.49± 0.03 | B | 15.96± 0.04 | B | -- | - | - | |||
59081.22 | 16.10± 0.03 | b | -- | - | - | -- | - | - | 15.64± 0.05 | B | ||
59136.11 | 16.18± 0.03 | b | 16.48± 0.03 | B | 15.95± 0.03 | B | -- | - | - | |||
59166.25 | 16.20± 0.03 | b | -- | - | - | -- | - | - | 15.75± 0.05 | B | ||
59380.36 | 16.25± 0.03 | b | -- | - | - | 16.07± 0.04 | B | -- | - | - | ||
59415.34 | 16.16± 0.03 | b | 16.47± 0.03 | B | -- | - | - | -- | - | - | ||
59442.32 | 16.17± 0.03 | b | -- | - | - | 15.94± 0.04 | B | 15.72± 0.05 | B | |||
59485.12 | 16.18± 0.03 | b | 16.49± 0.03 | B | -- | - | - | -- | - | - | ||
59525.06 | 16.24± 0.03 | b | -- | - | - | -- | - | - | 15.76± 0.05 | TB | ||
59551.04 | 16.22± 0.03 | b | 16.50± 0.03 | B | 15.98± 0.04 | B | -- | - | - | |||
59753.36 | 16.12± 0.03 | b | 16.42± 0.04 | B | -- | - | - | -- | - | - | ||
59816.21 | 16.21± 0.03 | Tb | -- | - | - | -- | - | - | -- | - | - | |
59823.21 | 16.16± 0.04 | b | -- | - | - | 15.94± 0.04 | B | -- | - | - | ||
59848.13 | 16.17± 0.03 | b | -- | - | - | -- | - | - | 15.68± 0.05 | B | ||
59903.15 | 16.16± 0.02 | b | 16.45± 0.03 | B | 15.93± 0.03 | 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 [0.18 mag] | B [0.22 mag] | R [0.22 mag] | |
---|---|---|---|
B [0.18 mag] | 0.93 (20) | ||
R [0.22 mag] | 0.90 (18) | 0.93 (10) | |
I [0.18 mag] | 0.88 (14) | 0.97 (3) | 0.95 (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) | 1.20 | 0.96 | ||
R (I|R) | 2.01 | 1.15 | 2.13 | 0.06 | |
I (I|R) | 1.66 | 1.12 | --- | --- | --- | ---- |
By John C. Martin, University of Illinois Springfield Henry R. Barber Research Observatory
Generated on 2023-08-14 14:15:12 UT-5