In a crowd but >4 mag brighter than all around it. J013336.92+303638.2 2 arcsec to NW that is blended and not well modeled so flag "B". ***Updated 180522***
MJD | V | * | Image | B | * | Image | R | * | Images | I | * | Images |
---|---|---|---|---|---|---|---|---|---|---|---|---|
56140.39 | 16.30± 0.04 | B | -- | - | - | 15.93± 0.08 | B | -- | - | - | ||
56593.16 | 16.29± 0.03 | B | 16.79± 0.03 | B | -- | - | - | -- | - | - | ||
56599.19 | 16.32± 0.04 | B | 16.77± 0.03 | B | 15.92± 0.06 | B | -- | - | - | |||
56976.19 | 16.35± 0.04 | B | 16.84± 0.04 | B | 15.91± 0.07 | B | -- | - | - | |||
57035.14 | 16.19± 0.04 | B | 16.71± 0.04 | B | 15.82± 0.04 | B | -- | - | - | |||
57310.16 | 16.24± 0.05 | B | 16.75± 0.04 | B | 15.84± 0.05 | B | -- | - | - | |||
57328.16 | 16.34± 0.03 | B | 16.91± 0.04 | B | 15.93± 0.04 | B | -- | - | - | |||
57406.10 | 16.24± 0.04 | B | 16.79± 0.04 | B | 15.89± 0.05 | B | 15.56± 0.07 | B | ||||
57634.38 | 16.28± 0.04 | B | 16.84± 0.05 | B | 15.89± 0.06 | B | 15.58± 0.08 | B | ||||
57964.36 | 16.34± 0.04 | AB | 16.72± 0.07 | B | 15.86± 0.05 | B | 15.66± 0.07 | AB | ||||
58043.11 | 16.35± 0.04 | AB | 16.85± 0.04 | B | 15.89± 0.05 | AB | 15.61± 0.06 | B | ||||
58073.21 | 16.23± 0.04 | AB | 16.73± 0.06 | AB | -- | - | - | -- | - | - | ||
58103.17 | 16.26± 0.04 | AB | 16.89± 0.04 | B | -- | - | - | -- | - | - | ||
58108.11 | 16.41± 0.05 | AB | 16.93± 0.06 | AB | -- | - | - | 15.67± 0.07 | AB | |||
58312.39 | 16.31± 0.05 | B | 16.77± 0.07 | B | -- | - | - | -- | - | - | ||
58316.35 | 16.39± 0.04 | B | 16.97± 0.04 | B | -- | - | - | -- | - | - | ||
58317.37 | 16.29± 0.05 | B | 16.77± 0.07 | B | 15.88± 0.04 | B | -- | - | - | |||
58341.36 | 16.43± 0.06 | AB | -- | - | - | -- | - | - | 15.69± 0.07 | AB | ||
58342.40 | 16.19± 0.05 | B | 16.72± 0.07 | B | 15.84± 0.05 | B | -- | - | - | |||
58373.15 | 16.32± 0.06 | B | 16.91± 0.06 | B | -- | - | - | -- | - | - | ||
58375.14 | 16.28± 0.04 | B | -- | - | - | 15.88± 0.05 | B | -- | - | - | ||
58420.10 | 16.19± 0.04 | B | 16.63± 0.06 | B | -- | - | - | 15.49± 0.06 | B | |||
58433.02 | 16.27± 0.05 | B | -- | - | - | 15.87± 0.05 | B | 15.48± 0.10 | B | |||
58673.38 | 16.34± 0.03 | B | 16.98± 0.04 | B | -- | - | - | -- | - | - | ||
58696.41 | 16.46± 0.05 | B | 16.91± 0.07 | B | 16.00± 0.07 | B | -- | - | - | |||
58750.19 | 16.35± 0.04 | B | -- | - | - | 15.91± 0.05 | B | -- | - | - | ||
58757.17 | 16.29± 0.05 | B | -- | - | - | 15.92± 0.05 | B | -- | - | - | ||
58779.18 | 16.18± 0.04 | B | 16.75± 0.03 | B | -- | - | - | -- | - | - | ||
58784.15 | 16.36± 0.05 | B | -- | - | - | -- | - | - | 15.62± 0.08 | B | ||
58812.21 | 16.24± 0.05 | AB | -- | - | - | 15.85± 0.06 | B | 15.56± 0.05 | B | |||
58902.06 | 16.28± 0.04 | AB | -- | - | - | 15.89± 0.04 | B | 15.50± 0.07 | B | |||
59056.38 | 16.25± 0.05 | B | 16.86± 0.06 | B | 15.83± 0.05 | B | 15.52± 0.07 | B | ||||
59059.40 | 16.38± 0.06 | B | -- | - | - | 15.97± 0.05 | B | 15.62± 0.07 | B | |||
59081.30 | 16.38± 0.05 | B | 16.90± 0.04 | B | 15.97± 0.05 | B | -- | - | - | |||
59082.32 | 16.37± 0.03 | B | 16.95± 0.03 | B | 15.94± 0.04 | B | -- | - | - | |||
59084.29 | -- | - | - | -- | - | - | 15.87± 0.05 | TB | -- | - | - | |
59161.09 | 16.32± 0.04 | AB | 16.86± 0.05 | AB | 15.94± 0.04 | AB | -- | - | - | |||
59171.11 | 16.30± 0.04 | AB | 16.85± 0.03 | B | -- | - | - | 15.61± 0.07 | AB | |||
59227.09 | 16.37± 0.03 | AB | 16.89± 0.04 | AB | 15.94± 0.04 | B | -- | - | - | |||
59415.37 | 16.35± 0.04 | AB | 16.95± 0.04 | B | 15.95± 0.04 | B | -- | - | - | |||
59441.39 | 16.34± 0.05 | B | 16.83± 0.06 | B | -- | - | - | -- | - | - | ||
59442.39 | 16.33± 0.03 | B | -- | - | - | 15.93± 0.05 | B | 15.63± 0.08 | B | |||
59463.30 | 16.28± 0.04 | AB | -- | - | - | -- | - | - | 15.60± 0.05 | B | ||
59523.16 | 16.34± 0.03 | AB | 16.82± 0.03 | B | 15.92± 0.04 | B | -- | - | - | |||
59525.16 | 16.28± 0.04 | AB | 16.75± 0.05 | B | -- | - | - | 15.60± 0.09 | B | |||
59546.16 | 16.33± 0.03 | AB | -- | - | - | 15.95± 0.05 | B | 15.60± 0.05 | B | |||
59551.13 | 16.32± 0.04 | AB | 16.75± 0.04 | AB | -- | - | - | -- | - | - | ||
59583.15 | 16.32± 0.03 | AB | -- | - | - | 15.90± 0.05 | B | 15.63± 0.08 | B | |||
59608.08 | 16.27± 0.03 | AB | -- | - | - | 15.88± 0.04 | B | 15.52± 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 [0.35 mag] | B [0.28 mag] | R [0.18 mag] | |
---|---|---|---|
B [0.35 mag] | 0.52 (33) | ||
R [0.18 mag] | 0.75 (31) | 0.59 (19) | |
I [0.20 mag] | 0.71 (20) | 0.20 (9) | 0.21 (13) |
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) | 2.23 | 1.26 | ||
R (I|R) | 1.00 | 1.54 | 0.93 | 0.07 | |
I (I|R) | 0.94 | 1.54 | 0.61 | 1.88 | 0.30 | 0.84 |
By John C. Martin, University of Illinois Springfield Henry R. Barber Research Observatory
Generated on 2023-08-14 14:15:12 UT-5