Not resolvable from LGGS star J004450.56+413038.3 less than 0.5 arcseconds N. May contribute up to -0.6 magnitudes or more to measured brightness.
MJD | V | * | Image | B | * | Image | R | * | Images | I | * | Images |
---|---|---|---|---|---|---|---|---|---|---|---|---|
56142.32 | 17.03± 0.05 | TB | -- | - | - | -- | - | - | -- | - | - | |
56267.15 | -- | - | - | -- | - | - | 16.54± 0.03 | TB | -- | - | - | |
56490.37 | 16.77± 0.04 | B | 17.16± 0.05 | B | -- | - | - | -- | - | - | ||
56536.24 | 16.81± 0.04 | B | -- | - | - | 16.36± 0.04 | B | -- | - | - | ||
56915.13 | 16.76± 0.03 | B | 17.15± 0.04 | B | 16.31± 0.04 | B | -- | - | - | |||
57227.31 | 16.87± 0.04 | B | 17.26± 0.04 | B | 16.45± 0.04 | B | -- | - | - | |||
57310.08 | 17.01± 0.03 | B | -- | - | - | -- | - | - | 16.39± 0.06 | B | ||
57633.28 | 17.11± 0.04 | B | 17.41± 0.04 | B | 16.67± 0.04 | B | -- | - | - | |||
57638.27 | 17.05± 0.05 | B | -- | - | - | -- | - | - | 16.47± 0.04 | B | ||
57928.37 | 16.80± 0.03 | B | 17.18± 0.04 | B | 16.40± 0.04 | B | 16.18± 0.06 | B | ||||
57958.29 | 16.61± 0.04 | B | 16.98± 0.04 | B | -- | - | - | 15.91± 0.04 | B | |||
58043.06 | 16.48± 0.04 | B | 16.88± 0.04 | B | -- | - | - | 15.83± 0.05 | B | |||
58098.09 | 16.47± 0.04 | B | 16.87± 0.04 | B | 16.03± 0.03 | AB | -- | - | - | |||
58312.29 | 16.70± 0.04 | B | 17.11± 0.04 | B | 16.31± 0.04 | B | -- | - | - | |||
58316.26 | 16.69± 0.04 | B | -- | - | - | -- | - | - | 16.00± 0.04 | B | ||
58341.23 | 16.66± 0.05 | B | 17.08± 0.05 | B | -- | - | - | -- | - | - | ||
58366.12 | 16.72± 0.03 | B | 17.10± 0.04 | B | -- | - | - | -- | - | - | ||
58375.12 | 16.69± 0.03 | B | -- | - | - | 16.29± 0.03 | B | -- | - | - | ||
58403.08 | 16.74± 0.04 | B | -- | - | - | -- | - | - | 16.07± 0.05 | B | ||
58433.09 | 16.75± 0.06 | B | 17.13± 0.06 | B | 16.32± 0.06 | B | -- | - | - | |||
58671.33 | 16.59± 0.06 | AB | 16.96± 0.05 | AB | -- | - | - | -- | - | - | ||
58673.29 | 16.60± 0.08 | B | -- | - | - | 16.17± 0.07 | B | 15.88± 0.08 | B | |||
58695.34 | 16.64± 0.05 | B | -- | - | - | 16.22± 0.04 | B | 15.95± 0.04 | B | |||
58696.30 | 16.66± 0.07 | B | 17.05± 0.07 | B | 16.23± 0.08 | B | -- | - | - | |||
58750.10 | 16.71± 0.05 | AB | 17.13± 0.05 | AB | -- | - | - | -- | - | - | ||
58779.07 | 16.69± 0.05 | AB | -- | - | - | 16.28± 0.03 | AB | -- | - | - | ||
58812.08 | 16.66± 0.06 | AB | -- | - | - | 16.26± 0.08 | B | 15.96± 0.04 | B | |||
59000.39 | 16.93± 0.07 | B | -- | - | - | 16.56± 0.10 | B | -- | - | - | ||
59055.31 | 17.01± 0.07 | B | -- | - | - | 16.60± 0.08 | B | -- | - | - | ||
59077.20 | 17.06± 0.07 | B | 17.39± 0.07 | B | 16.64± 0.07 | B | 16.49± 0.10 | B | ||||
59131.09 | 16.97± 0.07 | B | -- | - | - | 16.55± 0.07 | B | -- | - | - | ||
59166.12 | 17.00± 0.07 | B | -- | - | - | -- | - | - | 16.38± 0.09 | B | ||
59194.11 | 16.99± 0.07 | B | 17.31± 0.07 | B | -- | - | - | -- | - | - | ||
59376.35 | 16.81± 0.07 | B | 17.20± 0.07 | B | -- | - | - | -- | - | - | ||
59409.37 | 16.94± 0.07 | B | -- | - | - | 16.52± 0.07 | B | -- | - | - | ||
59441.26 | 16.90± 0.07 | B | 17.23± 0.07 | B | -- | - | - | 16.31± 0.09 | B | |||
59467.11 | 16.93± 0.07 | B | -- | - | - | 16.49± 0.06 | B | -- | - | - | ||
59522.04 | 16.93± 0.07 | B | 17.27± 0.07 | B | -- | - | - | 16.41± 0.11 | B | |||
59546.05 | 16.97± 0.07 | B | -- | - | - | 16.58± 0.07 | B | -- | - | - | ||
59583.10 | 16.98± 0.07 | B | 17.30± 0.07 | B | -- | - | - | -- | - | - | ||
59739.36 | 16.94± 0.07 | B | 17.33± 0.07 | B | 16.61± 0.07 | B | -- | - | - | |||
59816.14 | 17.02± 0.07 | B | -- | - | - | -- | - | - | 16.29± 0.07 | B | ||
59851.09 | 16.96± 0.07 | B | 17.27± 0.07 | B | 16.55± 0.07 | B | -- | - | - | |||
59879.03 | 16.97± 0.07 | B | -- | - | - | -- | - | - | 16.41± 0.07 | B | ||
59905.07 | 16.95± 0.07 | B | 17.25± 0.06 | B | 16.58± 0.07 | 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 [0.55 mag] | B [0.63 mag] | R [0.63 mag] | |
---|---|---|---|
B [0.55 mag] | 0.97 (24) | ||
R [0.63 mag] | 0.98 (24) | 0.96 (12) | |
I [0.66 mag] | 0.95 (16) | 0.97 (6) | 1.00 (5) |
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) | 11.32 | 0.84 | ||
R (I|R) | 11.13 | 0.94 | 15.25 | 0.15 | |
I (I|R) | 15.39 | 0.95 | 12.83 | 0.94 | 7.90 | 0.97 |
By John C. Martin, University of Illinois Springfield Henry R. Barber Research Observatory
Generated on 2023-08-14 14:15:12 UT-5