Color composite thumbnail image of Var BVar B (J013349.23+303809.1)


Target Notes

Color composite thumbnail image of Var_B

Classification: LBV

Unresolved from J013349.22+303809.3 of comparable brightness 0.24 arcseconds away.

Find In Simbad Query LGGS Massey (2016) at VizieR Query CAT WISE (Eisenhardt et al., 2020) at VizieR Query Gaia DR3 (2022) 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
56140.38 17.16± 0.04ABVar_B in filter V on MJD 56140.380
Var_B in filter V on MJD 56140.380
---- 17.05± 0.11ABVar_B in filter R on MJD 56140.380
Var_B in filter R on MJD 56140.380
----
56593.16 17.02± 0.03BVar_B in filter V on MJD 56593.160
 17.00± 0.03BVar_B in filter B on MJD 56593.160
--------
56599.18 17.04± 0.04ABVar_B in filter V on MJD 56599.180
Var_B in filter V on MJD 56599.180
 16.97± 0.05ABVar_B in filter B on MJD 56599.180
Var_B in filter B on MJD 56599.180
 16.94± 0.06ABVar_B in filter R on MJD 56599.180
Var_B in filter R on MJD 56599.180
----
56976.19 17.36± 0.04BVar_B in filter V on MJD 56976.190
 17.22± 0.05BVar_B in filter B on MJD 56976.190
 17.25± 0.07BVar_B in filter R on MJD 56976.190
----
57328.16 17.30± 0.04BVar_B in filter V on MJD 57328.160
 17.24± 0.04BVar_B in filter B on MJD 57328.160
 17.28± 0.04BVar_B in filter R on MJD 57328.160
----
57406.10 17.34± 0.05BVar_B in filter V on MJD 57406.100
 17.34± 0.05BVar_B in filter B on MJD 57406.100
 17.32± 0.06BVar_B in filter R on MJD 57406.100
 17.27± 0.09BVar_B in filter I on MJD 57406.100
57634.36 17.49± 0.05ABVar_B in filter V on MJD 57634.360
Var_B in filter V on MJD 57634.360
 17.35± 0.06ABVar_B in filter B on MJD 57634.360
Var_B in filter B on MJD 57634.360
 17.40± 0.06ABVar_B in filter R on MJD 57634.360
Var_B in filter R on MJD 57634.360
 17.58± 0.09ABVar_B in filter I on MJD 57634.360
Var_B in filter I on MJD 57634.360
57687.13 17.38± 0.04BVar_B in filter V on MJD 57687.130
 17.30± 0.06BVar_B in filter B on MJD 57687.130
 17.30± 0.05BVar_B in filter R on MJD 57687.130
 17.52± 0.08BVar_B in filter I on MJD 57687.130
57964.35 17.50± 0.05ABVar_B in filter V on MJD 57964.350
Var_B in filter V on MJD 57964.350
 17.38± 0.07ABVar_B in filter B on MJD 57964.350
Var_B in filter B on MJD 57964.350
 17.42± 0.05ABVar_B in filter R on MJD 57964.350
Var_B in filter R on MJD 57964.350
 17.53± 0.07ABVar_B in filter I on MJD 57964.350
Var_B in filter I on MJD 57964.350
58043.10 17.53± 0.04BVar_B in filter V on MJD 58043.100
---- 17.46± 0.04BVar_B in filter R on MJD 58043.100
 17.76± 0.09BVar_B in filter I on MJD 58043.100
58045.18 17.37± 0.05BVar_B in filter V on MJD 58045.180
 17.25± 0.07BVar_B in filter B on MJD 58045.180
 17.36± 0.06BVar_B in filter R on MJD 58045.180
----
58073.20 17.45± 0.05XVar_B in filter V on MJD 58073.200
 17.25± 0.07XVar_B in filter B on MJD 58073.200
--------
58103.17 17.37± 0.05ABVar_B in filter V on MJD 58103.170
Var_B in filter V on MJD 58103.170
 17.43± 0.04BVar_B in filter B on MJD 58103.170
--------
58108.13 17.44± 0.05ABVar_B in filter V on MJD 58108.130
Var_B in filter V on MJD 58108.130
 17.33± 0.07ABVar_B in filter B on MJD 58108.130
Var_B in filter B on MJD 58108.130
---- 17.50± 0.11ABVar_B in filter I on MJD 58108.130
Var_B in filter I on MJD 58108.130
58312.39 17.42± 0.05BVar_B in filter V on MJD 58312.390
 17.35± 0.08BVar_B in filter B on MJD 58312.390
--------
58317.37 17.39± 0.05BVar_B in filter V on MJD 58317.370
 17.28± 0.07BVar_B in filter B on MJD 58317.370
 17.38± 0.05BVar_B in filter R on MJD 58317.370
----
58341.34 17.50± 0.07BVar_B in filter V on MJD 58341.340
-------- 17.59± 0.08BVar_B in filter I on MJD 58341.340
58342.40 17.35± 0.06BVar_B in filter V on MJD 58342.400
 17.28± 0.07BVar_B in filter B on MJD 58342.400
 17.35± 0.06BVar_B in filter R on MJD 58342.400
----
58373.15 17.56± 0.06BVar_B in filter V on MJD 58373.150
 17.49± 0.07BVar_B in filter B on MJD 58373.150
--------
58375.14 17.52± 0.05BVar_B in filter V on MJD 58375.140
---- 17.46± 0.05BVar_B in filter R on MJD 58375.140
----
58420.10 17.42± 0.05BVar_B in filter V on MJD 58420.100
 17.24± 0.06BVar_B in filter B on MJD 58420.100
---- 17.46± 0.08BVar_B in filter I on MJD 58420.100
58433.00 17.50± 0.06BVar_B in filter V on MJD 58433.000
---- 17.42± 0.06BVar_B in filter R on MJD 58433.000
 17.70± 0.09BVar_B in filter I on MJD 58433.000
58672.39 17.22± 0.07BVar_B in filter V on MJD 58672.390
---- 17.11± 0.06BVar_B in filter R on MJD 58672.390
 17.53± 0.15BVar_B in filter I on MJD 58672.390
58673.38 17.39± 0.03BVar_B in filter V on MJD 58673.380
 17.36± 0.04BVar_B in filter B on MJD 58673.380
--------
58695.36 17.40± 0.05BVar_B in filter V on MJD 58695.360
 17.25± 0.05BVar_B in filter B on MJD 58695.360
 17.33± 0.04BVar_B in filter R on MJD 58695.360
----
58750.19 17.43± 0.04BVar_B in filter V on MJD 58750.190
---- 17.35± 0.05BVar_B in filter R on MJD 58750.190
----
58779.18 17.43± 0.05BVar_B in filter V on MJD 58779.180
 17.22± 0.04BVar_B in filter B on MJD 58779.180
--------
58784.12 17.37± 0.06BVar_B in filter V on MJD 58784.120
 17.25± 0.05BVar_B in filter B on MJD 58784.120
--------
58812.21 17.38± 0.05ABVar_B in filter V on MJD 58812.210
Var_B in filter V on MJD 58812.210
---- 17.25± 0.07BVar_B in filter R on MJD 58812.210
 17.47± 0.06BVar_B in filter I on MJD 58812.210
58902.06 17.37± 0.04ABVar_B in filter V on MJD 58902.060
Var_B in filter V on MJD 58902.060
---- 17.34± 0.04BVar_B in filter R on MJD 58902.060
 17.59± 0.10BVar_B in filter I on MJD 58902.060
59056.38 17.34± 0.04BVar_B in filter V on MJD 59056.380
 17.29± 0.06BVar_B in filter B on MJD 59056.380
 17.25± 0.05BVar_B in filter R on MJD 59056.380
 17.32± 0.08BVar_B in filter I on MJD 59056.380
59059.38 17.34± 0.05BVar_B in filter V on MJD 59059.380
 17.18± 0.06BVar_B in filter B on MJD 59059.380
--------
59081.26 17.41± 0.05BVar_B in filter V on MJD 59081.260
---- 17.34± 0.05BVar_B in filter R on MJD 59081.260
----
59082.32 17.42± 0.03BVar_B in filter V on MJD 59082.320
 17.33± 0.03BVar_B in filter B on MJD 59082.320
 17.35± 0.04BVar_B in filter R on MJD 59082.320
Var_B in filter R on MJD 59082.320
----
59084.29-------- 17.21± 0.05TBVar_B in filter R on MJD 59084.290
----
59161.09 17.32± 0.04ABVar_B in filter V on MJD 59161.090
Var_B in filter V on MJD 59161.090
 17.29± 0.05ABVar_B in filter B on MJD 59161.090
Var_B in filter B on MJD 59161.090
 17.27± 0.05ABVar_B in filter R on MJD 59161.090
Var_B in filter R on MJD 59161.090
----
59171.11 17.25± 0.04ABVar_B in filter V on MJD 59171.110
Var_B in filter V on MJD 59171.110
 17.24± 0.03BVar_B in filter B on MJD 59171.110
---- 17.36± 0.08ABVar_B in filter I on MJD 59171.110
Var_B in filter I on MJD 59171.110
59227.09 17.32± 0.03ABVar_B in filter V on MJD 59227.090
Var_B in filter V on MJD 59227.090
 17.24± 0.03ABVar_B in filter B on MJD 59227.090
Var_B in filter B on MJD 59227.090
 17.28± 0.04BVar_B in filter R on MJD 59227.090
----
59415.37 17.39± 0.04ABVar_B in filter V on MJD 59415.370
Var_B in filter V on MJD 59415.370
 17.33± 0.03BVar_B in filter B on MJD 59415.370
 17.32± 0.05BVar_B in filter R on MJD 59415.370
----
59441.39 17.35± 0.05BVar_B in filter V on MJD 59441.390
 17.23± 0.06BVar_B in filter B on MJD 59441.390
--------
59442.39 17.36± 0.03BVar_B in filter V on MJD 59442.390
---- 17.30± 0.05BVar_B in filter R on MJD 59442.390
 17.34± 0.09BVar_B in filter I on MJD 59442.390
59463.30 17.29± 0.05ABVar_B in filter V on MJD 59463.300
Var_B in filter V on MJD 59463.300
-------- 17.38± 0.06BVar_B in filter I on MJD 59463.300
59523.16 17.30± 0.03ABVar_B in filter V on MJD 59523.160
Var_B in filter V on MJD 59523.160
 17.25± 0.03BVar_B in filter B on MJD 59523.160
 17.23± 0.04BVar_B in filter R on MJD 59523.160
----
59525.16 17.27± 0.04ABVar_B in filter V on MJD 59525.160
Var_B in filter V on MJD 59525.160
 17.16± 0.05BVar_B in filter B on MJD 59525.160
---- 17.53± 0.10BVar_B in filter I on MJD 59525.160
59546.16 17.37± 0.03ABVar_B in filter V on MJD 59546.160
Var_B in filter V on MJD 59546.160
---- 17.35± 0.05BVar_B in filter R on MJD 59546.160
 17.41± 0.06BVar_B in filter I on MJD 59546.160
59551.13 17.30± 0.04ABVar_B in filter V on MJD 59551.130
Var_B in filter V on MJD 59551.130
 17.19± 0.04ABVar_B in filter B on MJD 59551.130
Var_B in filter B on MJD 59551.130
--------
59583.15 17.41± 0.04ABVar_B in filter V on MJD 59583.150
Var_B in filter V on MJD 59583.150
---- 17.34± 0.05BVar_B in filter R on MJD 59583.150
 17.46± 0.09BVar_B in filter I on MJD 59583.150
59608.08 17.31± 0.04ABVar_B in filter V on MJD 59608.080
Var_B in filter V on MJD 59608.080
---- 17.24± 0.05BVar_B in filter R on MJD 59608.080
 17.45± 0.07BVar_B in filter I on MJD 59608.080
59794.38 17.26± 0.04ABVar_B in filter V on MJD 59794.380
Var_B in filter V on MJD 59794.380
 17.23± 0.03BVar_B in filter B on MJD 59794.380
--------
59823.24 17.28± 0.04BVar_B in filter V on MJD 59823.240
 17.17± 0.05BVar_B in filter B on MJD 59823.240
--------
59849.16 17.40± 0.04BVar_B in filter V on MJD 59849.160
---- 17.15± 0.05BVar_B in filter R on MJD 59849.160
----
59851.14 17.39± 0.04ABVar_B in filter V on MJD 59851.140
Var_B in filter V on MJD 59851.140
---- 17.20± 0.04BVar_B in filter R on MJD 59851.140
 17.44± 0.09BVar_B in filter I on MJD 59851.140
59854.23 17.38± 0.04ABVar_B in filter V on MJD 59854.230
Var_B in filter V on MJD 59854.230
 17.27± 0.04ABVar_B in filter B on MJD 59854.230
Var_B in filter B on MJD 59854.230
--------
59879.13 17.37± 0.05ABVar_B in filter V on MJD 59879.130
Var_B in filter V on MJD 59879.130
 17.29± 0.03BVar_B in filter B on MJD 59879.130
---- 17.36± 0.07ABVar_B in filter I on MJD 59879.130
Var_B in filter I on MJD 59879.130
59903.22 17.33± 0.03BVar_B in filter V on MJD 59903.220
 17.28± 0.03BVar_B in filter B on MJD 59903.220
 17.23± 0.05BVar_B in filter R on MJD 59903.220
 17.40± 0.09BVar_B in filter I on MJD 59903.220
59904.12 17.30± 0.04BVar_B in filter V on MJD 59904.120
 17.22± 0.05BVar_B in filter B on MJD 59904.120
Var_B in filter B on MJD 59904.120
 17.27± 0.04BVar_B in filter R on MJD 59904.120
Var_B in filter R on MJD 59904.120
 17.38± 0.07BVar_B in filter I on MJD 59904.120
Var_B in filter I on MJD 59904.120
59932.14 17.32± 0.05ABVar_B in filter V on MJD 59932.140
Var_B in filter V on MJD 59932.140
---- 17.25± 0.05BVar_B in filter R on MJD 59932.140
 17.37± 0.09BVar_B in filter I on MJD 59932.140
60172.38 17.27± 0.03ABVar_B in filter V on MJD 60172.380
Var_B in filter V on MJD 60172.380
 17.17± 0.05BVar_B in filter B on MJD 60172.380
 17.17± 0.04BVar_B in filter R on MJD 60172.380
----
60205.16 17.21± 0.04ABVar_B in filter V on MJD 60205.160
Var_B in filter V on MJD 60205.160
 17.19± 0.03BVar_B in filter B on MJD 60205.160
 17.18± 0.05BVar_B in filter R on MJD 60205.160
----
60227.13 17.37± 0.04ABVar_B in filter V on MJD 60227.130
Var_B in filter V on MJD 60227.130
-------- 17.61± 0.10ABVar_B in filter I on MJD 60227.130
Var_B in filter I on MJD 60227.130
60261.12 17.26± 0.03BVar_B in filter V on MJD 60261.120
---- 17.20± 0.05BVar_B in filter R on MJD 60261.120
----
60262.14 17.22± 0.04ABVar_B in filter V on MJD 60262.140
Var_B in filter V on MJD 60262.140
 17.15± 0.04ABVar_B in filter B on MJD 60262.140
Var_B in filter B on MJD 60262.140
 17.19± 0.05BVar_B in filter R on MJD 60262.140
Var_B in filter R on MJD 60262.140
 17.42± 0.10BVar_B in filter I on MJD 60262.140
60290.17 17.23± 0.04ABVar_B in filter V on MJD 60290.170
Var_B in filter V on MJD 60290.170
 17.16± 0.04ABVar_B in filter B on MJD 60290.170
Var_B in filter B on MJD 60290.170
---- 17.40± 0.09ABVar_B in filter I on MJD 60290.170
Var_B in filter I on MJD 60290.170
60292.19 17.21± 0.04ABVar_B in filter V on MJD 60292.190
Var_B in filter V on MJD 60292.190
---- 17.14± 0.05ABVar_B in filter R on MJD 60292.190
Var_B in filter R on MJD 60292.190
----
60342.09 17.32± 0.04ABVar_B in filter V on MJD 60342.090
Var_B in filter V on MJD 60342.090
 17.29± 0.03BVar_B in filter B on MJD 60342.090
 17.23± 0.05BVar_B in filter R on MJD 60342.090
----
60504.38 17.25± 0.04BVar_B in filter V on MJD 60504.380
 17.21± 0.05BVar_B in filter B on MJD 60504.380
 17.19± 0.05BVar_B in filter R on MJD 60504.380
----
60506.36 17.35± 0.03BVar_B in filter V on MJD 60506.360
 17.32± 0.03BVar_B in filter B on MJD 60506.360
--------
60529.36 17.29± 0.05BVar_B in filter V on MJD 60529.360
-------- 17.32± 0.07BVar_B in filter I on MJD 60529.360
60533.38 17.30± 0.03BVar_B in filter V on MJD 60533.380
---- 17.21± 0.05BVar_B in filter R on MJD 60533.380
 17.32± 0.08BVar_B in filter I on MJD 60533.380
60556.26 17.31± 0.04ABVar_B in filter V on MJD 60556.260
Var_B in filter V on MJD 60556.260
 17.24± 0.04ABVar_B in filter B on MJD 60556.260
Var_B in filter B on MJD 60556.260
 17.27± 0.04BVar_B in filter R on MJD 60556.260
----
60594.11 17.32± 0.04ABVar_B in filter V on MJD 60594.110
Var_B in filter V on MJD 60594.110
---- 17.21± 0.06-Var_B in filter R on MJD 60594.110
 17.55± 0.10ABVar_B in filter I on MJD 60594.110
Var_B in filter I on MJD 60594.110
60612.15 17.38± 0.04ABVar_B in filter V on MJD 60612.150
Var_B in filter V on MJD 60612.150
 17.36± 0.02BVar_B in filter B on MJD 60612.150
 17.32± 0.06BVar_B in filter R on MJD 60612.150
----
60651.16 17.37± 0.04ABVar_B in filter V on MJD 60651.160
Var_B in filter V on MJD 60651.160
 17.24± 0.05BVar_B in filter B on MJD 60651.160
---- 17.55± 0.10BVar_B in filter I on MJD 60651.160
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 Var_BPlot of color for Var_B

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 [0.54 mag]B [0.53 mag]R [0.52 mag]
B [0.53 mag]0.74 (47)
R [0.52 mag]0.81 (46)0.77 (26)
I [0.49 mag]0.36 (32)0.01 (15)0.26 (21)

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 Var_B

Plot to assess correlation between bands for Var_B

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)		4.95 | 0.96
R
(I|R)		3.62 | 1.132.85 | 1.07
I
(I|R)		1.54 | 1.340.09 | 1.321.37 | 1.28

Back to catalog index

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

Generated on 2025-08-04 15:53:14 UT-5