Color composite thumbnail image of V-017442V-017442 (J013258.68+303152.8)



Target Notes

Color composite thumbnail image of V-017442

Classification: OB-Supergiant

No concerns.

Find In Simbad Query LGGS Massey (2016) at VizieR Query CAT WISE (Eisenhardt et al., 2020) at VizieR Query Gaia EDR3 (2020) at VizieR LBT Spectra @UMN
Query M33 Variability Hartman et al. Survey (2006) at VizieR


Photometry Table

Download table (txt) Key to Flags in Table Key For Images Plot/Graph Variability
MJDV*ImageB*ImageR*ImagesI*Images
56140.40 17.89± 0.06-V-017442 in filter V on MJD  56140.400
---- 17.60± 0.10-V-017442 in filter R on MJD  56140.400
----
56599.21 17.82± 0.05AV-017442 in filter V on MJD  56599.210
V-017442 in filter V on MJD  56599.210
17.90± 0.04AV-017442 in filter B on MJD  56599.210
V-017442 in filter B on MJD  56599.210
17.71± 0.06AV-017442 in filter R on MJD  56599.210
V-017442 in filter R on MJD  56599.210
----
56976.19 17.86± 0.05-V-017442 in filter V on MJD  56976.190
17.89± 0.05-V-017442 in filter B on MJD  56976.190
17.80± 0.07-V-017442 in filter R on MJD  56976.190
----
57035.14 17.88± 0.06-V-017442 in filter V on MJD  57035.140
18.02± 0.05-V-017442 in filter B on MJD  57035.140
17.82± 0.06-V-017442 in filter R on MJD  57035.140
----
57310.16 17.92± 0.05-V-017442 in filter V on MJD  57310.160
18.03± 0.05-V-017442 in filter B on MJD  57310.160
17.89± 0.06-V-017442 in filter R on MJD  57310.160
----
57328.16 17.89± 0.04-V-017442 in filter V on MJD  57328.160
17.99± 0.04-V-017442 in filter B on MJD  57328.160
17.78± 0.04-V-017442 in filter R on MJD  57328.160
----
57406.10 17.89± 0.07-V-017442 in filter V on MJD  57406.100
17.84± 0.07-V-017442 in filter B on MJD  57406.100
17.74± 0.06-V-017442 in filter R on MJD  57406.100
17.61± 0.10-V-017442 in filter I on MJD  57406.100
57634.39 17.85± 0.06AV-017442 in filter V on MJD  57634.390
V-017442 in filter V on MJD  57634.390
17.97± 0.07AV-017442 in filter B on MJD  57634.390
V-017442 in filter B on MJD  57634.390
17.70± 0.07AV-017442 in filter R on MJD  57634.390
V-017442 in filter R on MJD  57634.390
17.62± 0.10-V-017442 in filter I on MJD  57634.390
57638.40 17.89± 0.05AV-017442 in filter V on MJD  57638.400
V-017442 in filter V on MJD  57638.400
17.98± 0.04-V-017442 in filter B on MJD  57638.400
17.78± 0.04-V-017442 in filter R on MJD  57638.400
17.65± 0.09AV-017442 in filter I on MJD  57638.400
V-017442 in filter I on MJD  57638.400
57964.40 17.96± 0.04-V-017442 in filter V on MJD  57964.400
-------- 17.70± 0.08AV-017442 in filter I on MJD  57964.400
V-017442 in filter I on MJD  57964.400
58043.13 17.94± 0.04-V-017442 in filter V on MJD  58043.130
18.06± 0.04-V-017442 in filter B on MJD  58043.130
17.78± 0.04-V-017442 in filter R on MJD  58043.130
----
58073.22 17.90± 0.05-V-017442 in filter V on MJD  58073.220
18.07± 0.06-V-017442 in filter B on MJD  58073.220
--------
58108.09 17.90± 0.04-V-017442 in filter V on MJD  58108.090
18.05± 0.04-V-017442 in filter B on MJD  58108.090
---- 17.70± 0.08-V-017442 in filter I on MJD  58108.090
58316.35 17.91± 0.06-V-017442 in filter V on MJD  58316.350
18.09± 0.04-V-017442 in filter B on MJD  58316.350
--------
58341.37 17.94± 0.04-V-017442 in filter V on MJD  58341.370
-------- 17.57± 0.09-V-017442 in filter I on MJD  58341.370
58373.15 17.92± 0.06-V-017442 in filter V on MJD  58373.150
18.07± 0.07-V-017442 in filter B on MJD  58373.150
--------
58433.02 17.92± 0.06-V-017442 in filter V on MJD  58433.020
---- 17.86± 0.06-V-017442 in filter R on MJD  58433.020
17.77± 0.10-V-017442 in filter I on MJD  58433.020
58673.38 17.80± 0.03-V-017442 in filter V on MJD  58673.380
17.96± 0.04-V-017442 in filter B on MJD  58673.380
--------
58695.39 17.88± 0.05-V-017442 in filter V on MJD  58695.390
---- 17.75± 0.04-V-017442 in filter R on MJD  58695.390
----
58750.20 17.87± 0.04AV-017442 in filter V on MJD  58750.200
V-017442 in filter V on MJD  58750.200
18.06± 0.03-V-017442 in filter B on MJD  58750.200
17.69± 0.05-V-017442 in filter R on MJD  58750.200
17.68± 0.08-V-017442 in filter I on MJD  58750.200
58779.18 17.95± 0.04-V-017442 in filter V on MJD  58779.180
18.02± 0.04-V-017442 in filter B on MJD  58779.180
--------
58784.14 17.88± 0.04-V-017442 in filter V on MJD  58784.140
---- 17.76± 0.04-V-017442 in filter R on MJD  58784.140
----
58812.20 17.94± 0.06-V-017442 in filter V on MJD  58812.200
---- 17.86± 0.07-V-017442 in filter R on MJD  58812.200
----
59059.40 17.88± 0.06-V-017442 in filter V on MJD  59059.400
---- 17.79± 0.05-V-017442 in filter R on MJD  59059.400
17.70± 0.10-V-017442 in filter I on MJD  59059.400
59081.34 17.91± 0.06AV-017442 in filter V on MJD  59081.340
V-017442 in filter V on MJD  59081.340
18.00± 0.05AV-017442 in filter B on MJD  59081.340
V-017442 in filter B on MJD  59081.340
17.77± 0.05AV-017442 in filter R on MJD  59081.340
V-017442 in filter R on MJD  59081.340
17.56± 0.08-V-017442 in filter I on MJD  59081.340
59082.38 17.90± 0.05-V-017442 in filter V on MJD  59082.380
17.97± 0.03-V-017442 in filter B on MJD  59082.380
V-017442 in filter B on MJD  59082.380
V-017442 in filter B on MJD  59082.380
17.76± 0.04-V-017442 in filter R on MJD  59082.380
V-017442 in filter R on MJD  59082.380
V-017442 in filter R on MJD  59082.380
----
59084.25-------- 17.71± 0.04TV-017442 in filter R on MJD  59084.250
----
59161.14 17.83± 0.05-V-017442 in filter V on MJD  59161.140
---- 17.78± 0.05-V-017442 in filter R on MJD  59161.140
17.51± 0.09-V-017442 in filter I on MJD  59161.140
59171.15 17.84± 0.06AV-017442 in filter V on MJD  59171.150
V-017442 in filter V on MJD  59171.150
17.93± 0.07AV-017442 in filter B on MJD  59171.150
V-017442 in filter B on MJD  59171.150
17.78± 0.05-V-017442 in filter R on MJD  59171.150
17.59± 0.08AV-017442 in filter I on MJD  59171.150
V-017442 in filter I on MJD  59171.150
59227.14 17.87± 0.05AV-017442 in filter V on MJD  59227.140
V-017442 in filter V on MJD  59227.140
17.94± 0.05AV-017442 in filter B on MJD  59227.140
V-017442 in filter B on MJD  59227.140
17.74± 0.05AV-017442 in filter R on MJD  59227.140
V-017442 in filter R on MJD  59227.140
17.72± 0.08-V-017442 in filter I on MJD  59227.140
Download table (txt) Key to Flags in Table Key For Images Plot/Graph Variability


Plots of Brightness and Color

Key for Plot Variability Photometry Table Target Notes

Plot of photometry for V-017442Plot of color for V-017442

Key for Plot Variability Photometry Table Target Notes


Variability

Plot/Graph Photometry Table Target Notes

From the data available in this survey, it is not possible to tell with certainty if this star is variable.

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 [0.25 mag]B [0.16 mag]R [0.28 mag]
B [0.25 mag]0.31 (20)
R [0.28 mag]0.20 (21)0.05 (14)
I [0.26 mag]0.12 (13)0.15 (8)0.05 (10)

Magnitude-Magnitude Plots

The plots below are provided to check the values in the table above and also to show any non-linear correlations

Plot to assess correlation between bands for V-017442

Plot to assess correlation between bands for V-017442

Plot/Graph Photometry Table Target Notes

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)
0.64 | 1.69
R
(I|R)
0.28 | 0.650.26 | 0.24
I
(I|R)
0.21 | 0.850.32 | 1.950.08 | 0.95

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By John C. Martin, University of Illinois Springfield Henry R. Barber Research Observatory

Generated on 2021-11-06 16:53:54 UT-5