(Candidate LBV) Resolved from J013416.04+303637.9 of comparable brightness 4.2 arseconds S.
MJD | V | * | Image | B | * | Image | R | * | Images | I | * | Images |
---|---|---|---|---|---|---|---|---|---|---|---|---|
56140.37 | 18.01± 0.06 | - | -- | - | - | 17.48± 0.11 | - | -- | - | - | ||
56599.17 | 18.05± 0.06 | - | 18.04± 0.07 | - | 17.58± 0.05 | - | -- | - | - | |||
56976.16 | 17.83± 0.04 | - | 17.91± 0.06 | - | 17.47± 0.06 | - | -- | - | - | |||
57038.13 | 17.88± 0.05 | - | 17.86± 0.06 | - | 17.58± 0.05 | - | -- | - | - | |||
57310.13 | 18.02± 0.07 | - | 18.17± 0.08 | - | 17.76± 0.06 | - | -- | - | - | |||
57335.18 | 17.99± 0.06 | - | -- | - | - | 17.58± 0.05 | - | -- | - | - | ||
57401.10 | 17.95± 0.05 | - | 17.96± 0.06 | - | -- | - | - | -- | - | - | ||
57406.10 | 17.87± 0.08 | - | 18.03± 0.08 | - | 17.55± 0.07 | - | 17.42± 0.10 | - | ||||
57634.34 | 17.98± 0.05 | - | 18.02± 0.07 | - | 17.73± 0.06 | - | 17.67± 0.07 | - | ||||
57638.43 | 18.00± 0.06 | - | -- | - | - | -- | - | - | 17.74± 0.11 | - | ||
57687.13 | 18.02± 0.05 | - | 18.19± 0.07 | - | 17.74± 0.05 | - | 17.61± 0.08 | - | ||||
57964.35 | 17.97± 0.05 | A | 17.97± 0.07 | A | 17.64± 0.05 | A | 17.54± 0.07 | A | ||||
58045.16 | 17.83± 0.05 | A | 17.92± 0.07 | A | 17.54± 0.06 | A | -- | - | - | |||
58073.19 | 17.82± 0.05 | A | 17.86± 0.07 | A | -- | - | - | -- | - | - | ||
58103.16 | 17.95± 0.05 | A | -- | - | - | -- | - | - | 17.44± 0.07 | - | ||
58108.11 | 17.89± 0.06 | - | 17.83± 0.08 | - | -- | - | - | 18.31± 0.22 | X | |||
58312.39 | 17.89± 0.06 | - | 17.84± 0.10 | - | -- | - | - | -- | - | - | ||
58316.38 | 17.95± 0.04 | - | 17.93± 0.06 | - | 17.62± 0.04 | - | 17.71± 0.07 | - | ||||
58317.37 | 17.95± 0.05 | - | 17.92± 0.07 | - | 17.62± 0.05 | - | -- | - | - | |||
58341.34 | 17.82± 0.07 | - | -- | - | - | -- | - | - | 17.51± 0.07 | - | ||
58342.38 | 17.93± 0.06 | A | 17.88± 0.07 | A | 17.59± 0.05 | A | 17.44± 0.07 | - | ||||
58375.14 | 17.84± 0.05 | - | -- | - | - | 17.49± 0.05 | - | -- | - | - | ||
58420.08 | 17.94± 0.05 | A | 17.94± 0.07 | A | 17.49± 0.05 | - | 17.52± 0.09 | A | ||||
58433.00 | 17.91± 0.07 | - | -- | - | - | 17.60± 0.06 | - | 17.52± 0.08 | - | |||
58672.39 | 17.88± 0.08 | - | -- | - | - | 17.53± 0.06 | - | 17.16± 0.11 | - | |||
58695.36 | 17.84± 0.05 | - | 17.82± 0.06 | - | 17.59± 0.04 | - | -- | - | - | |||
58784.12 | 17.83± 0.06 | - | 17.80± 0.06 | - | -- | - | - | -- | - | - | ||
58812.22 | 17.82± 0.05 | - | -- | - | - | -- | - | - | 17.45± 0.06 | - | ||
58902.07 | 17.85± 0.04 | - | -- | - | - | 17.60± 0.05 | - | -- | - | - | ||
59059.38 | 17.68± 0.05 | - | 17.70± 0.06 | - | -- | - | - | -- | - | - | ||
59081.30 | 17.58± 0.04 | A | 17.59± 0.06 | - | 17.28± 0.04 | A | -- | - | - | |||
59084.34 | -- | - | - | -- | - | - | 17.34± 0.04 | T | -- | - | - | |
59161.07 | 17.52± 0.05 | - | 17.59± 0.07 | - | 17.25± 0.04 | - | -- | - | - | |||
59171.09 | 17.55± 0.05 | - | -- | - | - | -- | - | - | 17.08± 0.07 | - | ||
59227.08 | 17.61± 0.04 | - | 17.63± 0.04 | - | 17.32± 0.04 | - | -- | - | - | |||
59415.36 | 17.70± 0.05 | - | -- | - | - | 17.45± 0.05 | - | -- | - | - | ||
59441.39 | 17.73± 0.05 | - | 17.75± 0.06 | - | -- | - | - | -- | - | - | ||
59463.30 | 17.71± 0.05 | A | -- | - | - | -- | - | - | 17.46± 0.06 | - | ||
59523.15 | 17.71± 0.04 | - | -- | - | - | 17.42± 0.04 | - | -- | - | - | ||
59525.15 | 17.71± 0.04 | - | 17.74± 0.05 | - | -- | - | - | -- | - | - | ||
59546.15 | 17.63± 0.04 | - | -- | - | - | -- | - | - | 17.42± 0.06 | - | ||
59551.11 | 17.64± 0.05 | - | 17.82± 0.05 | - | -- | - | - | -- | - | - | ||
59583.15 | 17.79± 0.04 | - | -- | - | - | 17.49± 0.05 | - | -- | - | - | ||
59608.07 | 17.60± 0.05 | - | -- | - | - | -- | - | - | 17.17± 0.06 | - |
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 [0.60 mag] | B [0.53 mag] | R [0.51 mag] | |
---|---|---|---|
B [0.60 mag] | 0.79 (26) | ||
R [0.51 mag] | 0.74 (26) | 0.81 (17) | |
I [0.66 mag] | 0.55 (17) | 0.05 (7) | 0.36 (9) |
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) | 6.37 | 0.79 | ||
R (I|R) | 6.86 | 1.11 | 7.03 | 0.32 | |
I (I|R) | 5.67 | 1.39 | 0.39 | 0.87 | 1.56 | 0.88 |
By John C. Martin, University of Illinois Springfield Henry R. Barber Research Observatory
Generated on 2023-08-14 14:15:12 UT-5