Target Notes
Classification: -
It is likely that less than half the flux in these measurements comes from the target. It is unresolved from J013418.80+303410.0 of 0.5 magnitudes brighter 1.3 arcseconds W. Additional confusion from another two LGGS stars of comparable brightness 2 arcseconds S and 3 arcseconds SW.
Photometry Table
| MJD | V | * | Image | B | * | Image | R | * | Images | I | * | Images |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 56140.37 | 17.96± 0.07 | TB |  | -- | - | - | > 13.59 | X |  | -- | - | - |
| 56599.17 | 17.77± 0.05 | B |  | 17.69± 0.07 | B |  | 17.82± 0.06 | B |  | -- | - | - |
| 56976.16 | 17.88± 0.06 | B |  | 17.63± 0.06 | B |  | 17.79± 0.06 | B |  | -- | - | - |
| 56982.22 | 17.95± 0.07 | B |  | 17.72± 0.07 | B |  | 17.99± 0.08 | B |  | -- | - | - |
| 57038.13 | 17.94± 0.06 | B |  | 17.63± 0.06 | B |  | 17.93± 0.06 | B |  | -- | - | - |
| 57310.13 | 17.83± 0.06 | B |  | 17.58± 0.07 | B |  | 17.80± 0.06 | B |  | -- | - | - |
| 57328.19 | 17.80± 0.06 | B |  | 17.62± 0.07 | B |  | 17.88± 0.07 | B |  | -- | - | - |
| 57335.18 | 17.85± 0.07 | B |  | -- | - | - | 17.76± 0.05 | B |  | -- | - | - |
| 57401.10 | 17.89± 0.06 | B |  | 17.67± 0.06 | B |  | -- | - | - | -- | - | - |
| 57406.10 | >14.170 | B |  | 17.68± 0.06 | TB |  | 17.81± 0.08 | TB |  | 18.20± 0.15 | TB |  |
| 57634.34 | 17.85± 0.05 | B |  | 17.66± 0.08 | B |  | 17.86± 0.06 | B |  | 18.09± 0.08 | B |  |
| 57638.43 | 17.99± 0.08 | B |  | -- | - | - | -- | - | - | 18.34± 0.13 | B |  |
| 57687.13 | 17.78± 0.05 | B |  | 17.56± 0.06 | B |  | 17.82± 0.05 | B |  | > 15.78 | B |  |
| 57964.33 | 17.85± 0.05 | B |  | 17.59± 0.08 | B |  | 17.83± 0.06 | B |  | > 15.84 | B |  |
| 58045.16 | 17.79± 0.05 | AB |   | 17.57± 0.07 | AB |   | 17.82± 0.06 | AB |   | -- | - | - |
| 58073.20 | 17.76± 0.05 | B |  | 17.52± 0.07 | B |  | -- | - | - | -- | - | - |
| 58103.18 | 17.82± 0.06 | TB |  | -- | - | - | -- | - | - | -- | - | - |
| 58108.11 | 17.91± 0.07 | B |  | 17.70± 0.09 | B |  | -- | - | - | > 14.47 | B |  |
| 58312.39 | 18.06± 0.07 | B |  | 17.79± 0.09 | B |  | -- | - | - | -- | - | - |
| 58316.38 | 17.92± 0.04 | B |  | 17.69± 0.06 | B |  | 17.91± 0.05 | B |  | > 15.98 | B |  |
| 58317.37 | 18.02± 0.06 | B |  | 17.73± 0.08 | B |  | 17.96± 0.06 | B |  | -- | - | - |
| 58341.34 | 17.95± 0.08 | B |  | -- | - | - | -- | - | - | 18.02± 0.09 | B |  |
| 58342.38 | 17.98± 0.07 | AB |   | 17.78± 0.08 | AB |   | 18.02± 0.07 | AB |   | 17.98± 0.09 | B |  |
| 58375.14 | 17.91± 0.06 | B |  | -- | - | - | 17.90± 0.06 | B |  | -- | - | - |
| 58420.10 | 17.82± 0.05 | B |  | 17.56± 0.07 | B |  | -- | - | - | > 15.53 | B |  |
| 58433.00 | 17.86± 0.07 | B |  | -- | - | - | 17.86± 0.06 | B |  | > 15.32 | B |  |
| 58672.39 | 17.77± 0.08 | B |  | -- | - | - | 17.94± 0.07 | B |  | > 14.68 | B |  |
| 58695.36 | 17.91± 0.07 | B |  | 17.67± 0.07 | B |  | 18.01± 0.06 | B |  | -- | - | - |
| 58784.12 | 17.93± 0.07 | B |  | 17.78± 0.07 | B |  | -- | - | - | -- | - | - |
| 58812.22 | 17.74± 0.05 | TB |  | -- | - | - | -- | - | - | > 16.47 | B |  |
| 58902.07 | 17.90± 0.06 | B |  | -- | - | - | 17.91± 0.06 | B |  | -- | - | - |
| 59059.38 | 17.87± 0.06 | B |  | 17.65± 0.07 | B |  | -- | - | - | -- | - | - |
| 59081.26 | 17.82± 0.06 | B |  | -- | - | - | 17.89± 0.06 | B |  | -- | - | - |
| 59084.34 | -- | - | - | -- | - | - | 17.93± 0.06 | TB |  | -- | - | - |
| 59161.07 | 17.78± 0.06 | B |  | 17.67± 0.07 | B |  | 17.95± 0.07 | B |  | -- | - | - |
| 59171.09 | 17.73± 0.06 | TB |  | -- | - | - | -- | - | - | > 15.91 | - |  |
| 59227.08 | 17.98± 0.06 | B |  | 17.72± 0.06 | B |  | 17.97± 0.07 | B |  | -- | - | - |
| 59415.36 | 17.95± 0.07 | B |  | -- | - | - | 18.05± 0.08 | B |  | -- | - | - |
| 59441.39 | 17.94± 0.07 | B |  | 17.66± 0.07 | B |  | -- | - | - | -- | - | - |
| 59463.30 | 17.93± 0.07 | B |   | -- | - | - | -- | - | - | 18.03± 0.08 | B |  |
| 59523.15 | 17.91± 0.06 | B |  | -- | - | - | 17.96± 0.06 | B |  | -- | - | - |
| 59525.15 | 17.89± 0.06 | B |  | 17.61± 0.06 | B |  | -- | - | - | -- | - | - |
| 59546.15 | 17.94± 0.06 | B |  | -- | - | - | -- | - | - | 18.01± 0.08 | B |  |
| 59551.11 | 17.67± 0.05 | B |  | 17.53± 0.06 | B |  | -- | - | - | -- | - | - |
| 59583.15 | 17.94± 0.06 | B |  | -- | - | - | 17.99± 0.07 | B |  | -- | - | - |
| 59608.07 | 17.73± 0.05 | TB |  | -- | - | - | -- | - | - | > 15.58 | - |  |
| 59794.35 | 17.93± 0.06 | TB |  | -- | - | - | -- | - | - | -- | - | - |
| 59823.24 | 17.82± 0.06 | B |  | 17.61± 0.06 | B |  | -- | - | - | -- | - | - |
| 59851.13 | 17.78± 0.05 | B |  | -- | - | - | 17.69± 0.05 | B |  | -- | - | - |
| 59854.22 | 17.73± 0.05 | B |  | 17.54± 0.06 | B |  | -- | - | - | -- | - | - |
| 59879.12 | 17.82± 0.05 | B |  | -- | - | - | -- | - | - | 18.05± 0.09 | B |   |
| 59904.12 | 17.83± 0.05 | B |  | 17.66± 0.06 | B |  | 17.93± 0.06 | B |  | 18.04± 0.08 | B |  |
| 59932.13 | 17.93± 0.07 | B |  | -- | - | - | 18.07± 0.08 | B |  | -- | - | - |
| 60172.37 | 17.93± 0.07 | B |  | 17.71± 0.07 | B |  | -- | - | - | -- | - | - |
| 60205.15 | 17.88± 0.07 | B |  | -- | - | - | 17.95± 0.07 | B |  | -- | - | - |
| 60227.12 | 17.80± 0.06 | TB |  | -- | - | - | -- | - | - | > 15.46 | - |  |
| 60262.13 | 17.78± 0.05 | B |  | 17.55± 0.05 | B |  | 17.86± 0.06 | B |  | -- | - | - |
| 60290.15 | 17.71± 0.05 | B |  | 17.57± 0.06 | B |  | -- | - | - | > 16.08 | - |  |
| 60292.18 | 17.92± 0.06 | B |  | -- | - | - | 17.90± 0.06 | B |  | -- | - | - |
| 60342.08 | 18.00± 0.07 | B |  | -- | - | - | 18.05± 0.08 | B |  | -- | - | - |
| 60504.38 | 18.08± 0.07 | B |  | 17.87± 0.07 | B |  | 18.12± 0.08 | B |  | -- | - | - |
| 60529.36 | 17.95± 0.06 | B |  | -- | - | - | -- | - | - | 18.15± 0.09 | B |  |
| 60556.24 | 17.91± 0.06 | B |  | 17.63± 0.06 | B |  | 17.92± 0.07 | B |  | -- | - | - |
| 60594.10 | 17.77± 0.06 | TB |  | -- | - | - | -- | - | - | > 15.38 | - |  |
| 60612.14 | 17.79± 0.06 | B |  | -- | - | - | 17.89± 0.07 | B |  | -- | - | - |
| 60651.14 | 17.88± 0.06 | B |  | 17.70± 0.06 | B |  | -- | - | - | -- | - | - |
| 61025.19 | 17.95± 0.11 | B |  | 17.77± 0.13 | B |  | 17.95± 0.12 | B |  | > 16.06 | B |  |
| 61080.04 | 18.05± 0.13 | B |  | 17.96± 0.15 | B |  | -- | - | - | -- | - | - |
| 61083.04 | 18.16± 0.13 | B |  | -- | - | - | 18.06± 0.11 | B |  | -- | - | - |
Plots of Brightness and Color
Correlation factors between bands
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 [0.49 mag] | B [0.45 mag] | R [0.43 mag] | |
|---|---|---|---|
| B [0.45 mag] | 0.70 (37) | ||
| R [0.43 mag] | 0.52 (37) | 0.63 (22) | |
| I [0.00 mag] | 0.09 (9) | 0.28 (4) | 0.90 (4) |
Magnitude-Magnitude Plots
The plots below are provided to check the values in the table above and also to show any non-linear correlations
I & R Statistics
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) | 1.66 | 0.75 | ||
| R (I|R) | 1.32 | 0.99 | 0.91 | 0.23 | |
| I (I|R) | 0.20 | 1.40 | --- | --- | --- | ---- |
By John C. Martin, University of Illinois Springfield Henry R. Barber Research Observatory
Generated on 2026-10-12 15:55:15 UT-5