Unable to resolved from star J004406.24+420132.4 (4 magnitude fainter) about 1 arcsecond away. That contributes about -0.03 magnitudes in R and V and -0.06 magnitudes in B.
MJD | V | * | Image | B | * | Image | R | * | Images | I | * | Images |
---|---|---|---|---|---|---|---|---|---|---|---|---|
56142.35 | 15.54± 0.03 | Tb | -- | - | - | -- | - | - | -- | - | - | |
56267.17 | -- | - | - | -- | - | - | 15.33± 0.04 | Tb | -- | - | - | |
56537.22 | 15.56± 0.03 | b | 16.02± 0.03 | b | 15.30± 0.04 | b | -- | - | - | |||
56593.08 | 15.60± 0.03 | b | -- | - | - | 15.31± 0.03 | b | -- | - | - | ||
57282.18 | 15.65± 0.03 | b | 16.12± 0.04 | b | 15.37± 0.04 | b | -- | - | - | |||
57314.14 | 15.66± 0.03 | b | -- | - | - | -- | - | - | 15.09± 0.05 | b | ||
57635.41 | 15.53± 0.07 | b | 15.98± 0.08 | b | 15.26± 0.07 | b | 14.97± 0.07 | b | ||||
57958.32 | 15.62± 0.06 | b | 16.11± 0.06 | b | -- | - | - | 15.08± 0.06 | b | |||
57963.28 | 15.65± 0.06 | b | 16.09± 0.05 | b | 15.37± 0.06 | b | -- | - | - | |||
58045.07 | 15.62± 0.04 | b | 16.06± 0.04 | b | 15.31± 0.05 | b | -- | - | - | |||
58067.12 | 15.64± 0.05 | b | -- | - | - | -- | - | - | 15.09± 0.07 | b | ||
58098.12 | 15.61± 0.06 | b | 16.09± 0.05 | b | -- | - | - | -- | - | - | ||
58312.32 | 15.63± 0.05 | b | 16.08± 0.04 | b | 15.35± 0.05 | b | -- | - | - | |||
58316.28 | 15.68± 0.04 | b | -- | - | - | -- | - | - | 15.11± 0.06 | b | ||
58372.12 | -- | - | - | -- | - | - | -- | - | - | 15.04± 0.06 | Tb | |
58403.12 | 15.57± 0.04 | b | -- | - | - | 15.28± 0.06 | b | -- | - | - | ||
58671.30 | 15.70± 0.03 | Tb | -- | - | - | -- | - | - | -- | - | - | |
58672.32 | 15.61± 0.04 | b | -- | - | - | 15.32± 0.05 | b | 15.01± 0.07 | b | |||
58695.31 | 15.62± 0.04 | b | -- | - | - | 15.34± 0.04 | b | 15.05± 0.05 | b | |||
58750.10 | 15.63± 0.03 | b | 16.06± 0.02 | b | -- | - | - | -- | - | - | ||
58779.07 | 15.58± 0.03 | b | -- | - | - | 15.29± 0.04 | b | -- | - | - | ||
58836.18 | 15.61± 0.03 | b | -- | - | - | -- | - | - | 15.05± 0.04 | b | ||
59001.37 | 15.59± 0.04 | b | -- | - | - | 15.30± 0.05 | b | -- | - | - | ||
59019.33 | 15.64± 0.05 | b | 16.09± 0.04 | b | -- | - | - | -- | - | - | ||
59055.32 | 15.62± 0.04 | Ab | 16.06± 0.04 | b | 15.34± 0.03 | b | 15.05± 0.05 | Ab | ||||
59077.22 | 15.61± 0.04 | b | -- | - | - | 15.33± 0.04 | b | -- | - | - | ||
59082.20 | 15.64± 0.03 | b | 16.10± 0.03 | b | 15.34± 0.02 | b | -- | - | - | |||
59131.06 | 15.60± 0.03 | Ab | 16.02± 0.04 | b | 15.30± 0.03 | b | -- | - | - | |||
59166.08 | 15.60± 0.03 | Ab | -- | - | - | -- | - | - | 15.03± 0.05 | Ab | ||
59194.08 | 15.62± 0.03 | Ab | 16.07± 0.02 | b | 15.34± 0.04 | b | -- | - | - | |||
59376.36 | 15.61± 0.05 | b | 16.09± 0.05 | b | -- | - | - | -- | - | - | ||
59379.35 | 15.60± 0.04 | b | -- | - | - | 15.30± 0.03 | b | -- | - | - | ||
59409.39 | 15.64± 0.03 | Ab | 16.12± 0.06 | b | 15.34± 0.04 | b | -- | - | - | |||
59442.28 | 15.61± 0.03 | Ab | 16.05± 0.04 | b | 15.32± 0.03 | b | 15.03± 0.05 | Ab | ||||
59467.15 | 15.60± 0.03 | Ab | 16.02± 0.03 | b | 15.32± 0.04 | b | -- | - | - | |||
59522.07 | 15.62± 0.03 | b | 16.05± 0.04 | b | -- | - | - | -- | - | - | ||
59546.08 | 15.58± 0.03 | Ab | 16.01± 0.03 | b | -- | - | - | 15.04± 0.05 | b | |||
59583.08 | 15.61± 0.04 | Ab | -- | - | - | 15.36± 0.05 | b | 15.06± 0.04 | b | |||
59753.33 | 15.61± 0.04 | Ab | 16.10± 0.04 | b | 15.35± 0.04 | b | -- | - | - | |||
59816.18 | 15.59± 0.03 | Ab | 16.03± 0.03 | b | 15.30± 0.03 | b | -- | - | - | |||
59848.07 | 15.60± 0.03 | Ab | 16.05± 0.04 | b | -- | - | - | 15.05± 0.03 | b | |||
59851.07 | 15.63± 0.04 | b | -- | - | - | 15.35± 0.05 | b | 15.07± 0.07 | b | |||
59854.14 | 15.61± 0.03 | b | 16.07± 0.03 | b | 15.33± 0.03 | b | -- | - | - | |||
59879.07 | 15.60± 0.04 | b | 16.03± 0.04 | b | -- | - | - | -- | - | - | ||
59905.22 | 15.60± 0.03 | b | 16.04± 0.04 | b | -- | - | - | 15.04± 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 [0.15 mag] | B [0.18 mag] | R [0.11 mag] | |
---|---|---|---|
B [0.15 mag] | 0.73 (26) | ||
R [0.11 mag] | 0.79 (26) | 0.80 (16) | |
I [0.14 mag] | 0.85 (16) | 0.74 (7) | 0.91 (7) |
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) | 0.50 | 1.48 | ||
R (I|R) | 0.35 | 0.89 | -0.47 | 0.04 | |
I (I|R) | 0.36 | 1.31 | 0.24 | 1.94 | 0.29 | 1.20 |
By John C. Martin, University of Illinois Springfield Henry R. Barber Research Observatory
Generated on 2023-08-14 14:15:12 UT-5