Color composite thumbnail image of V-139873V-139873 (J013437.25+303817.7)



Target Notes

Color composite thumbnail image of V-139873

Classification: OB-Supergiant

No blend 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
56140.37 17.49± 0.06-V-139873 in filter V on MJD  56140.370
---- 17.24± 0.11-V-139873 in filter R on MJD  56140.370
----
56599.17 17.52± 0.05-V-139873 in filter V on MJD  56599.170
17.84± 0.07-V-139873 in filter B on MJD  56599.170
17.24± 0.06-V-139873 in filter R on MJD  56599.170
----
56976.16 17.45± 0.04-V-139873 in filter V on MJD  56976.160
17.79± 0.06-V-139873 in filter B on MJD  56976.160
17.18± 0.05-V-139873 in filter R on MJD  56976.160
----
57038.13 17.40± 0.04-V-139873 in filter V on MJD  57038.130
17.68± 0.05-V-139873 in filter B on MJD  57038.130
17.13± 0.04-V-139873 in filter R on MJD  57038.130
----
57310.13 17.47± 0.06-V-139873 in filter V on MJD  57310.130
17.74± 0.07-V-139873 in filter B on MJD  57310.130
17.21± 0.05-V-139873 in filter R on MJD  57310.130
----
57335.18 17.44± 0.06-V-139873 in filter V on MJD  57335.180
---- 17.17± 0.05-V-139873 in filter R on MJD  57335.180
----
57401.10 17.50± 0.05-V-139873 in filter V on MJD  57401.100
17.81± 0.06-V-139873 in filter B on MJD  57401.100
--------
57634.34 17.45± 0.05-V-139873 in filter V on MJD  57634.340
17.78± 0.07-V-139873 in filter B on MJD  57634.340
17.19± 0.05-V-139873 in filter R on MJD  57634.340
16.87± 0.06-V-139873 in filter I on MJD  57634.340
57687.13 17.46± 0.05-V-139873 in filter V on MJD  57687.130
17.73± 0.07-V-139873 in filter B on MJD  57687.130
17.17± 0.05-V-139873 in filter R on MJD  57687.130
16.91± 0.07-V-139873 in filter I on MJD  57687.130
57964.35 17.46± 0.04AV-139873 in filter V on MJD  57964.350
V-139873 in filter V on MJD  57964.350
17.77± 0.06AV-139873 in filter B on MJD  57964.350
V-139873 in filter B on MJD  57964.350
17.17± 0.05AV-139873 in filter R on MJD  57964.350
V-139873 in filter R on MJD  57964.350
16.86± 0.06AV-139873 in filter I on MJD  57964.350
V-139873 in filter I on MJD  57964.350
58045.16 17.40± 0.05AV-139873 in filter V on MJD  58045.160
V-139873 in filter V on MJD  58045.160
17.69± 0.07AV-139873 in filter B on MJD  58045.160
V-139873 in filter B on MJD  58045.160
17.17± 0.05AV-139873 in filter R on MJD  58045.160
V-139873 in filter R on MJD  58045.160
----
58073.19 17.52± 0.04AV-139873 in filter V on MJD  58073.190
V-139873 in filter V on MJD  58073.190
17.76± 0.06AV-139873 in filter B on MJD  58073.190
V-139873 in filter B on MJD  58073.190
--------
58103.16 17.39± 0.04AV-139873 in filter V on MJD  58103.160
V-139873 in filter V on MJD  58103.160
-------- 16.85± 0.06-V-139873 in filter I on MJD  58103.160
58108.11 17.37± 0.05-V-139873 in filter V on MJD  58108.110
17.63± 0.08-V-139873 in filter B on MJD  58108.110
---- 16.73± 0.08-V-139873 in filter I on MJD  58108.110
58312.39 17.41± 0.05-V-139873 in filter V on MJD  58312.390
17.70± 0.09-V-139873 in filter B on MJD  58312.390
--------
58316.38 17.42± 0.03-V-139873 in filter V on MJD  58316.380
17.76± 0.06-V-139873 in filter B on MJD  58316.380
17.13± 0.03-V-139873 in filter R on MJD  58316.380
16.79± 0.04-V-139873 in filter I on MJD  58316.380
58317.37 17.43± 0.04-V-139873 in filter V on MJD  58317.370
17.67± 0.06-V-139873 in filter B on MJD  58317.370
V-139873 in filter B on MJD  58317.370
17.09± 0.04-V-139873 in filter R on MJD  58317.370
V-139873 in filter R on MJD  58317.370
----
58341.34 17.38± 0.07-V-139873 in filter V on MJD  58341.340
-------- 16.79± 0.07-V-139873 in filter I on MJD  58341.340
58342.38 17.46± 0.05AV-139873 in filter V on MJD  58342.380
V-139873 in filter V on MJD  58342.380
17.70± 0.07AV-139873 in filter B on MJD  58342.380
V-139873 in filter B on MJD  58342.380
17.16± 0.04AV-139873 in filter R on MJD  58342.380
V-139873 in filter R on MJD  58342.380
16.79± 0.04-V-139873 in filter I on MJD  58342.380
V-139873 in filter I on MJD  58342.380
58375.14 17.39± 0.05-V-139873 in filter V on MJD  58375.140
---- 17.14± 0.05-V-139873 in filter R on MJD  58375.140
----
58420.08 17.39± 0.04AV-139873 in filter V on MJD  58420.080
V-139873 in filter V on MJD  58420.080
17.67± 0.06AV-139873 in filter B on MJD  58420.080
V-139873 in filter B on MJD  58420.080
17.11± 0.04-V-139873 in filter R on MJD  58420.080
17.03± 0.07AV-139873 in filter I on MJD  58420.080
V-139873 in filter I on MJD  58420.080
58433.00 17.42± 0.05-V-139873 in filter V on MJD  58433.000
---- 17.18± 0.06-V-139873 in filter R on MJD  58433.000
16.98± 0.07-V-139873 in filter I on MJD  58433.000
58672.39 17.57± 0.07-V-139873 in filter V on MJD  58672.390
---- 17.25± 0.06-V-139873 in filter R on MJD  58672.390
16.93± 0.10-V-139873 in filter I on MJD  58672.390
58695.36 17.47± 0.05-V-139873 in filter V on MJD  58695.360
17.74± 0.05-V-139873 in filter B on MJD  58695.360
17.18± 0.04-V-139873 in filter R on MJD  58695.360
----
58784.12 17.48± 0.06-V-139873 in filter V on MJD  58784.120
17.74± 0.06-V-139873 in filter B on MJD  58784.120
--------
58812.22 17.46± 0.04-V-139873 in filter V on MJD  58812.220
-------- 16.93± 0.05-V-139873 in filter I on MJD  58812.220
58902.07 17.44± 0.04-V-139873 in filter V on MJD  58902.070
---- 17.17± 0.04-V-139873 in filter R on MJD  58902.070
----
59059.38 17.42± 0.05-V-139873 in filter V on MJD  59059.380
17.70± 0.06-V-139873 in filter B on MJD  59059.380
--------
59081.30 17.36± 0.04AV-139873 in filter V on MJD  59081.300
V-139873 in filter V on MJD  59081.300
17.66± 0.06-V-139873 in filter B on MJD  59081.300
17.10± 0.04AV-139873 in filter R on MJD  59081.300
V-139873 in filter R on MJD  59081.300
----
59084.34-------- 17.14± 0.04TV-139873 in filter R on MJD  59084.340
----
59161.07 17.45± 0.05-V-139873 in filter V on MJD  59161.070
17.76± 0.06-V-139873 in filter B on MJD  59161.070
17.19± 0.04-V-139873 in filter R on MJD  59161.070
----
59171.09 17.38± 0.04-V-139873 in filter V on MJD  59171.090
-------- 16.79± 0.06-V-139873 in filter I on MJD  59171.090
59227.08 17.48± 0.04-V-139873 in filter V on MJD  59227.080
17.80± 0.04-V-139873 in filter B on MJD  59227.080
17.20± 0.04-V-139873 in filter R on MJD  59227.080
----
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-139873Plot of color for V-139873

Key for Plot Variability Photometry Table Target Notes


Variability

Plot/Graph Photometry Table Target Notes

It is very likely that 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 [0.21 mag]B [0.21 mag]R [0.16 mag]
B [0.21 mag]0.70 (22)
R [0.16 mag]0.73 (22)0.68 (16)
I [0.30 mag]0.12 (13)0.02 (7)0.00 (8)

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-139873

Plot to assess correlation between bands for V-139873

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)
0.68 | 0.89
R
(I|R)
0.68 | 1.011.36 | 0.06
I
(I|R)
0.33 | 0.71-0.02 | 0.540.11 | 0.55

Back to catalog index


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

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