Color composite thumbnail image of Var 83Var 83 (J013410.93+303437.6)


Target Notes

Color composite thumbnail image of Var_83

Classification: LBV

Five LGGS stars >4 magnitudes fainter within 5 arcseconds.]

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
56140.37 16.29± 0.05bVar_83 in filter V on MJD 56140.370
---- 16.09± 0.06bVar_83 in filter R on MJD 56140.370
----
56599.17 16.49± 0.05bVar_83 in filter V on MJD 56599.170
 16.52± 0.06bVar_83 in filter B on MJD 56599.170
 16.19± 0.05bVar_83 in filter R on MJD 56599.170
----
56976.16 16.28± 0.04bVar_83 in filter V on MJD 56976.160
 16.34± 0.06bVar_83 in filter B on MJD 56976.160
 16.01± 0.05bVar_83 in filter R on MJD 56976.160
----
56982.22 16.32± 0.06bVar_83 in filter V on MJD 56982.220
 16.35± 0.06bVar_83 in filter B on MJD 56982.220
 16.03± 0.07bVar_83 in filter R on MJD 56982.220
----
57038.13 16.34± 0.04bVar_83 in filter V on MJD 57038.130
 16.37± 0.05bVar_83 in filter B on MJD 57038.130
 16.07± 0.04bVar_83 in filter R on MJD 57038.130
----
57310.13 15.84± 0.05bVar_83 in filter V on MJD 57310.130
 15.93± 0.07bVar_83 in filter B on MJD 57310.130
 15.54± 0.04bVar_83 in filter R on MJD 57310.130
----
57328.19 15.88± 0.05bVar_83 in filter V on MJD 57328.190
 15.97± 0.07bVar_83 in filter B on MJD 57328.190
 15.62± 0.07bVar_83 in filter R on MJD 57328.190
----
57335.18 15.92± 0.06bVar_83 in filter V on MJD 57335.180
---- 15.63± 0.04bVar_83 in filter R on MJD 57335.180
----
57401.10 15.94± 0.04bVar_83 in filter V on MJD 57401.100
 16.03± 0.05bVar_83 in filter B on MJD 57401.100
--------
57406.10 15.93± 0.04bVar_83 in filter V on MJD 57406.100
 16.05± 0.03bVar_83 in filter B on MJD 57406.100
 15.66± 0.04bVar_83 in filter R on MJD 57406.100
 15.50± 0.07bVar_83 in filter I on MJD 57406.100
57634.37 15.89± 0.05AbVar_83 in filter V on MJD 57634.370
Var_83 in filter V on MJD 57634.370
 15.97± 0.08AbVar_83 in filter B on MJD 57634.370
Var_83 in filter B on MJD 57634.370
 15.65± 0.07AbVar_83 in filter R on MJD 57634.370
Var_83 in filter R on MJD 57634.370
 15.58± 0.06bVar_83 in filter I on MJD 57634.370
57638.43 15.89± 0.06bVar_83 in filter V on MJD 57638.430
-------- 15.50± 0.10bVar_83 in filter I on MJD 57638.430
57687.13 15.75± 0.04bVar_83 in filter V on MJD 57687.130
 15.87± 0.06bVar_83 in filter B on MJD 57687.130
 15.52± 0.04bVar_83 in filter R on MJD 57687.130
 15.35± 0.06bVar_83 in filter I on MJD 57687.130
57964.33 16.11± 0.04bVar_83 in filter V on MJD 57964.330
 16.17± 0.07bVar_83 in filter B on MJD 57964.330
 15.85± 0.05bVar_83 in filter R on MJD 57964.330
 15.67± 0.06bVar_83 in filter I on MJD 57964.330
58045.16 16.06± 0.04AbVar_83 in filter V on MJD 58045.160
Var_83 in filter V on MJD 58045.160
 16.14± 0.07AbVar_83 in filter B on MJD 58045.160
Var_83 in filter B on MJD 58045.160
 15.84± 0.05AbVar_83 in filter R on MJD 58045.160
Var_83 in filter R on MJD 58045.160
----
58073.20 16.09± 0.04bVar_83 in filter V on MJD 58073.200
 16.21± 0.06AbVar_83 in filter B on MJD 58073.200
Var_83 in filter B on MJD 58073.200
--------
58103.16 16.17± 0.04AbVar_83 in filter V on MJD 58103.160
Var_83 in filter V on MJD 58103.160
-------- 15.86± 0.06bVar_83 in filter I on MJD 58103.160
58108.11 16.11± 0.05bVar_83 in filter V on MJD 58108.110
 16.17± 0.08bVar_83 in filter B on MJD 58108.110
---- 15.77± 0.07bVar_83 in filter I on MJD 58108.110
58312.39 16.12± 0.05bVar_83 in filter V on MJD 58312.390
 16.17± 0.07bVar_83 in filter B on MJD 58312.390
--------
58317.37 16.13± 0.04bVar_83 in filter V on MJD 58317.370
 16.19± 0.07bVar_83 in filter B on MJD 58317.370
 15.90± 0.04bVar_83 in filter R on MJD 58317.370
----
58341.34 15.95± 0.06bVar_83 in filter V on MJD 58341.340
-------- 15.57± 0.07bVar_83 in filter I on MJD 58341.340
58342.40 16.00± 0.05bVar_83 in filter V on MJD 58342.400
 16.08± 0.07bVar_83 in filter B on MJD 58342.400
 15.79± 0.05bVar_83 in filter R on MJD 58342.400
----
58375.14 16.09± 0.04bVar_83 in filter V on MJD 58375.140
---- 15.84± 0.05bVar_83 in filter R on MJD 58375.140
----
58420.10 16.03± 0.04bVar_83 in filter V on MJD 58420.100
 16.08± 0.06bVar_83 in filter B on MJD 58420.100
---- 15.63± 0.06bVar_83 in filter I on MJD 58420.100
58433.00 15.98± 0.04bVar_83 in filter V on MJD 58433.000
---- 15.74± 0.05bVar_83 in filter R on MJD 58433.000
 15.61± 0.06bVar_83 in filter I on MJD 58433.000
58672.39 16.20± 0.07bVar_83 in filter V on MJD 58672.390
---- 15.95± 0.05bVar_83 in filter R on MJD 58672.390
 15.91± 0.07bVar_83 in filter I on MJD 58672.390
58695.36 16.19± 0.05bVar_83 in filter V on MJD 58695.360
 16.25± 0.05bVar_83 in filter B on MJD 58695.360
 15.97± 0.04bVar_83 in filter R on MJD 58695.360
----
58784.12 16.21± 0.05bVar_83 in filter V on MJD 58784.120
 16.30± 0.05bVar_83 in filter B on MJD 58784.120
--------
58812.22 16.15± 0.05bVar_83 in filter V on MJD 58812.220
-------- 15.79± 0.05bVar_83 in filter I on MJD 58812.220
58902.07 16.20± 0.04bVar_83 in filter V on MJD 58902.070
---- 15.98± 0.04bVar_83 in filter R on MJD 58902.070
----
59059.38 16.44± 0.05bVar_83 in filter V on MJD 59059.380
 16.50± 0.05bVar_83 in filter B on MJD 59059.380
--------
59081.26 16.46± 0.05bVar_83 in filter V on MJD 59081.260
---- 16.22± 0.05bVar_83 in filter R on MJD 59081.260
----
59084.34-------- 16.24± 0.04TbVar_83 in filter R on MJD 59084.340
----
59161.07 16.66± 0.05bVar_83 in filter V on MJD 59161.070
 16.72± 0.06bVar_83 in filter B on MJD 59161.070
 16.39± 0.04bVar_83 in filter R on MJD 59161.070
----
59171.09 16.64± 0.05bVar_83 in filter V on MJD 59171.090
-------- 16.33± 0.06bVar_83 in filter I on MJD 59171.090
59227.08 16.78± 0.04bVar_83 in filter V on MJD 59227.080
 16.80± 0.04bVar_83 in filter B on MJD 59227.080
 16.50± 0.04bVar_83 in filter R on MJD 59227.080
----
59415.36 16.75± 0.04bVar_83 in filter V on MJD 59415.360
---- 16.51± 0.04bVar_83 in filter R on MJD 59415.360
----
59441.39 16.80± 0.05bVar_83 in filter V on MJD 59441.390
 16.80± 0.06bVar_83 in filter B on MJD 59441.390
--------
59463.30 16.76± 0.04AbVar_83 in filter V on MJD 59463.300
Var_83 in filter V on MJD 59463.300
-------- 16.57± 0.05bVar_83 in filter I on MJD 59463.300
59523.15 16.78± 0.04bVar_83 in filter V on MJD 59523.150
---- 16.56± 0.04bVar_83 in filter R on MJD 59523.150
----
59525.15 16.75± 0.04bVar_83 in filter V on MJD 59525.150
 16.75± 0.05bVar_83 in filter B on MJD 59525.150
--------
59546.15 16.79± 0.04bVar_83 in filter V on MJD 59546.150
-------- 16.60± 0.05bVar_83 in filter I on MJD 59546.150
59551.11 16.78± 0.04bVar_83 in filter V on MJD 59551.110
 16.77± 0.05bVar_83 in filter B on MJD 59551.110
--------
59583.15 16.76± 0.04bVar_83 in filter V on MJD 59583.150
---- 16.54± 0.04bVar_83 in filter R on MJD 59583.150
----
59608.07 16.76± 0.04bVar_83 in filter V on MJD 59608.070
-------- 16.60± 0.05bVar_83 in filter I on MJD 59608.070
59794.35 16.49± 0.04TbVar_83 in filter V on MJD 59794.350
------------
59823.24 16.51± 0.04bVar_83 in filter V on MJD 59823.240
 16.53± 0.04bVar_83 in filter B on MJD 59823.240
--------
59851.13 16.53± 0.04bVar_83 in filter V on MJD 59851.130
---- 16.31± 0.04bVar_83 in filter R on MJD 59851.130
----
59854.22 16.55± 0.04bVar_83 in filter V on MJD 59854.220
 16.58± 0.05bVar_83 in filter B on MJD 59854.220
--------
59879.12 16.51± 0.04bVar_83 in filter V on MJD 59879.120
-------- 16.25± 0.06AbVar_83 in filter I on MJD 59879.120
Var_83 in filter I on MJD 59879.120
59904.12 16.52± 0.04bVar_83 in filter V on MJD 59904.120
 16.56± 0.05bVar_83 in filter B on MJD 59904.120
 16.30± 0.04bVar_83 in filter R on MJD 59904.120
 16.28± 0.06bVar_83 in filter I on MJD 59904.120
59932.13 16.52± 0.05bVar_83 in filter V on MJD 59932.130
---- 16.31± 0.05bVar_83 in filter R on MJD 59932.130
----
60172.37 16.55± 0.04bVar_83 in filter V on MJD 60172.370
 16.58± 0.04bVar_83 in filter B on MJD 60172.370
--------
60205.15 16.50± 0.04bVar_83 in filter V on MJD 60205.150
---- 16.29± 0.04bVar_83 in filter R on MJD 60205.150
----
60227.12 16.50± 0.04bVar_83 in filter V on MJD 60227.120
-------- 16.23± 0.05bVar_83 in filter I on MJD 60227.120
60262.13 16.52± 0.04bVar_83 in filter V on MJD 60262.130
 16.55± 0.04bVar_83 in filter B on MJD 60262.130
 16.32± 0.04bVar_83 in filter R on MJD 60262.130
----
60290.15 16.50± 0.04bVar_83 in filter V on MJD 60290.150
 16.54± 0.05bVar_83 in filter B on MJD 60290.150
---- 16.26± 0.06bVar_83 in filter I on MJD 60290.150
60292.18 16.52± 0.04bVar_83 in filter V on MJD 60292.180
---- 16.30± 0.05bVar_83 in filter R on MJD 60292.180
----
60342.08 16.47± 0.04bVar_83 in filter V on MJD 60342.080
---- 16.27± 0.05bVar_83 in filter R on MJD 60342.080
----
60504.38 16.54± 0.04bVar_83 in filter V on MJD 60504.380
 16.60± 0.04bVar_83 in filter B on MJD 60504.380
 16.32± 0.05bVar_83 in filter R on MJD 60504.380
----
60529.36 16.55± 0.04bVar_83 in filter V on MJD 60529.360
-------- 16.30± 0.06bVar_83 in filter I on MJD 60529.360
60556.24 16.51± 0.04bVar_83 in filter V on MJD 60556.240
 16.55± 0.05bVar_83 in filter B on MJD 60556.240
 16.31± 0.04bVar_83 in filter R on MJD 60556.240
----
60594.10 16.54± 0.05bVar_83 in filter V on MJD 60594.100
-------- 16.28± 0.06bVar_83 in filter I on MJD 60594.100
60612.14 16.50± 0.05bVar_83 in filter V on MJD 60612.140
---- 16.32± 0.05bVar_83 in filter R on MJD 60612.140
----
60651.14 16.50± 0.04bVar_83 in filter V on MJD 60651.140
 16.53± 0.05bVar_83 in filter B on MJD 60651.140
--------
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 Var_83Plot of color for Var_83

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 [1.05 mag]B [0.94 mag]R [1.04 mag]
B [0.94 mag]1.00 (35)
R [1.04 mag]0.99 (36)0.99 (20)
I [1.25 mag]0.99 (22)0.97 (8)0.98 (7)

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_83

Plot to assess correlation between bands for Var_83

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)		34.71 | 0.74
R
(I|R)		45.25 | 1.0134.80 | 0.58
I
(I|R)		50.42 | 1.0727.44 | 0.8629.43 | 1.12

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