Color composite thumbnail image of M33-013424.78M33-013424.78 (J013424.78+303306.6)


Target Notes

Color composite thumbnail image of M33-013424.78

Classification: OB-Supergiant

(Candidate LBV) No blend concerns

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 17.05± 0.05-M33-013424.78 in filter V on MJD 56140.370
---- 16.86± 0.08-M33-013424.78 in filter R on MJD 56140.370
----
56599.17 16.94± 0.05-M33-013424.78 in filter V on MJD 56599.170
 17.02± 0.06-M33-013424.78 in filter B on MJD 56599.170
 16.75± 0.05-M33-013424.78 in filter R on MJD 56599.170
----
56976.16 17.01± 0.04-M33-013424.78 in filter V on MJD 56976.160
 17.13± 0.06-M33-013424.78 in filter B on MJD 56976.160
 16.84± 0.05-M33-013424.78 in filter R on MJD 56976.160
----
56982.22 16.99± 0.06-M33-013424.78 in filter V on MJD 56982.220
 17.08± 0.06-M33-013424.78 in filter B on MJD 56982.220
 16.84± 0.07-M33-013424.78 in filter R on MJD 56982.220
----
57038.13 17.10± 0.04-M33-013424.78 in filter V on MJD 57038.130
 17.16± 0.05-M33-013424.78 in filter B on MJD 57038.130
 16.93± 0.04-M33-013424.78 in filter R on MJD 57038.130
----
57310.13 17.00± 0.05-M33-013424.78 in filter V on MJD 57310.130
 17.10± 0.07-M33-013424.78 in filter B on MJD 57310.130
 16.79± 0.05-M33-013424.78 in filter R on MJD 57310.130
----
57328.19 16.90± 0.05-M33-013424.78 in filter V on MJD 57328.190
 16.98± 0.07-M33-013424.78 in filter B on MJD 57328.190
 16.75± 0.07-M33-013424.78 in filter R on MJD 57328.190
----
57335.18 16.95± 0.06-M33-013424.78 in filter V on MJD 57335.180
---- 16.78± 0.04-M33-013424.78 in filter R on MJD 57335.180
----
57401.10 17.02± 0.04-M33-013424.78 in filter V on MJD 57401.100
 17.11± 0.05-M33-013424.78 in filter B on MJD 57401.100
--------
57634.34 16.97± 0.04-M33-013424.78 in filter V on MJD 57634.340
 17.11± 0.07-M33-013424.78 in filter B on MJD 57634.340
 16.85± 0.05-M33-013424.78 in filter R on MJD 57634.340
 16.64± 0.06-M33-013424.78 in filter I on MJD 57634.340
57638.43 16.94± 0.06-M33-013424.78 in filter V on MJD 57638.430
-------- 16.56± 0.10-M33-013424.78 in filter I on MJD 57638.430
57687.13 17.09± 0.04-M33-013424.78 in filter V on MJD 57687.130
 17.24± 0.06-M33-013424.78 in filter B on MJD 57687.130
 16.90± 0.04-M33-013424.78 in filter R on MJD 57687.130
 16.74± 0.06-M33-013424.78 in filter I on MJD 57687.130
57964.33 17.01± 0.04-M33-013424.78 in filter V on MJD 57964.330
 17.07± 0.07-M33-013424.78 in filter B on MJD 57964.330
 16.85± 0.05-M33-013424.78 in filter R on MJD 57964.330
 16.72± 0.06-M33-013424.78 in filter I on MJD 57964.330
58045.18 16.99± 0.05-M33-013424.78 in filter V on MJD 58045.180
 17.07± 0.07-M33-013424.78 in filter B on MJD 58045.180
 16.81± 0.06-M33-013424.78 in filter R on MJD 58045.180
----
58073.20 17.03± 0.04-M33-013424.78 in filter V on MJD 58073.200
 17.09± 0.07-M33-013424.78 in filter B on MJD 58073.200
--------
58103.18 16.98± 0.05TM33-013424.78 in filter V on MJD 58103.180
------------
58108.11 16.92± 0.05-M33-013424.78 in filter V on MJD 58108.110
 17.00± 0.08-M33-013424.78 in filter B on MJD 58108.110
---- 16.44± 0.07-M33-013424.78 in filter I on MJD 58108.110
58312.39 16.84± 0.05-M33-013424.78 in filter V on MJD 58312.390
 16.94± 0.07-M33-013424.78 in filter B on MJD 58312.390
--------
58317.37 16.86± 0.04-M33-013424.78 in filter V on MJD 58317.370
 16.95± 0.07-M33-013424.78 in filter B on MJD 58317.370
 16.67± 0.04-M33-013424.78 in filter R on MJD 58317.370
----
58341.34 16.95± 0.06-M33-013424.78 in filter V on MJD 58341.340
-------- 16.60± 0.07-M33-013424.78 in filter I on MJD 58341.340
58342.40 17.01± 0.05-M33-013424.78 in filter V on MJD 58342.400
 17.09± 0.07-M33-013424.78 in filter B on MJD 58342.400
 16.87± 0.05-M33-013424.78 in filter R on MJD 58342.400
----
58375.14 16.89± 0.04-M33-013424.78 in filter V on MJD 58375.140
---- 16.74± 0.05-M33-013424.78 in filter R on MJD 58375.140
----
58420.08 17.05± 0.04AM33-013424.78 in filter V on MJD 58420.080
M33-013424.78 in filter V on MJD 58420.080
 17.14± 0.06AM33-013424.78 in filter B on MJD 58420.080
M33-013424.78 in filter B on MJD 58420.080
 16.79± 0.04-M33-013424.78 in filter R on MJD 58420.080
 16.70± 0.07AM33-013424.78 in filter I on MJD 58420.080
M33-013424.78 in filter I on MJD 58420.080
58433.00 16.95± 0.05-M33-013424.78 in filter V on MJD 58433.000
---- 16.75± 0.05-M33-013424.78 in filter R on MJD 58433.000
 16.66± 0.06-M33-013424.78 in filter I on MJD 58433.000
58672.39 16.94± 0.07-M33-013424.78 in filter V on MJD 58672.390
---- 16.74± 0.05-M33-013424.78 in filter R on MJD 58672.390
 16.64± 0.09-M33-013424.78 in filter I on MJD 58672.390
58695.36 16.85± 0.05-M33-013424.78 in filter V on MJD 58695.360
 16.96± 0.05-M33-013424.78 in filter B on MJD 58695.360
 16.67± 0.04-M33-013424.78 in filter R on MJD 58695.360
----
58784.12 16.88± 0.05-M33-013424.78 in filter V on MJD 58784.120
 16.96± 0.05-M33-013424.78 in filter B on MJD 58784.120
--------
58812.22 16.94± 0.05-M33-013424.78 in filter V on MJD 58812.220
-------- 16.58± 0.05-M33-013424.78 in filter I on MJD 58812.220
58902.07 16.84± 0.04-M33-013424.78 in filter V on MJD 58902.070
---- 16.68± 0.04-M33-013424.78 in filter R on MJD 58902.070
----
59059.38 16.90± 0.05-M33-013424.78 in filter V on MJD 59059.380
 16.98± 0.05-M33-013424.78 in filter B on MJD 59059.380
--------
59081.26 16.92± 0.05-M33-013424.78 in filter V on MJD 59081.260
---- 16.75± 0.05-M33-013424.78 in filter R on MJD 59081.260
----
59084.34-------- 16.70± 0.04TM33-013424.78 in filter R on MJD 59084.340
----
59161.07 16.88± 0.05-M33-013424.78 in filter V on MJD 59161.070
 16.98± 0.06-M33-013424.78 in filter B on MJD 59161.070
 16.70± 0.04-M33-013424.78 in filter R on MJD 59161.070
----
59171.09 16.81± 0.05-M33-013424.78 in filter V on MJD 59171.090
-------- 16.47± 0.06-M33-013424.78 in filter I on MJD 59171.090
59227.08 16.82± 0.04-M33-013424.78 in filter V on MJD 59227.080
 16.99± 0.04-M33-013424.78 in filter B on MJD 59227.080
 16.63± 0.04-M33-013424.78 in filter R on MJD 59227.080
----
59415.36 16.86± 0.04-M33-013424.78 in filter V on MJD 59415.360
---- 16.68± 0.04-M33-013424.78 in filter R on MJD 59415.360
----
59441.39 16.89± 0.05-M33-013424.78 in filter V on MJD 59441.390
 17.03± 0.06-M33-013424.78 in filter B on MJD 59441.390
--------
59463.30 16.88± 0.04AM33-013424.78 in filter V on MJD 59463.300
M33-013424.78 in filter V on MJD 59463.300
-------- 16.52± 0.05-M33-013424.78 in filter I on MJD 59463.300
59523.15 16.88± 0.04-M33-013424.78 in filter V on MJD 59523.150
---- 16.69± 0.04-M33-013424.78 in filter R on MJD 59523.150
----
59525.15 16.85± 0.04-M33-013424.78 in filter V on MJD 59525.150
 16.96± 0.04-M33-013424.78 in filter B on MJD 59525.150
--------
59546.15 16.84± 0.04-M33-013424.78 in filter V on MJD 59546.150
-------- 16.40± 0.05-M33-013424.78 in filter I on MJD 59546.150
59551.11 16.79± 0.04-M33-013424.78 in filter V on MJD 59551.110
 16.95± 0.05-M33-013424.78 in filter B on MJD 59551.110
--------
59583.15 16.83± 0.04-M33-013424.78 in filter V on MJD 59583.150
---- 16.62± 0.04-M33-013424.78 in filter R on MJD 59583.150
----
59608.07 16.84± 0.04-M33-013424.78 in filter V on MJD 59608.070
-------- 16.48± 0.05-M33-013424.78 in filter I on MJD 59608.070
59794.35 16.89± 0.04TM33-013424.78 in filter V on MJD 59794.350
------------
59823.24 16.78± 0.04-M33-013424.78 in filter V on MJD 59823.240
 16.92± 0.04-M33-013424.78 in filter B on MJD 59823.240
--------
59851.13 16.90± 0.04-M33-013424.78 in filter V on MJD 59851.130
---- 16.73± 0.04-M33-013424.78 in filter R on MJD 59851.130
----
59854.22 16.92± 0.04-M33-013424.78 in filter V on MJD 59854.220
 17.06± 0.05-M33-013424.78 in filter B on MJD 59854.220
--------
59879.12 16.79± 0.04-M33-013424.78 in filter V on MJD 59879.120
-------- 16.39± 0.06AM33-013424.78 in filter I on MJD 59879.120
M33-013424.78 in filter I on MJD 59879.120
59904.12 16.83± 0.04-M33-013424.78 in filter V on MJD 59904.120
 16.98± 0.04-M33-013424.78 in filter B on MJD 59904.120
 16.66± 0.04-M33-013424.78 in filter R on MJD 59904.120
 16.51± 0.06-M33-013424.78 in filter I on MJD 59904.120
59932.13 16.80± 0.06-M33-013424.78 in filter V on MJD 59932.130
---- 16.63± 0.05-M33-013424.78 in filter R on MJD 59932.130
----
60172.37 16.86± 0.04-M33-013424.78 in filter V on MJD 60172.370
 16.99± 0.04-M33-013424.78 in filter B on MJD 60172.370
--------
60205.15 16.83± 0.04-M33-013424.78 in filter V on MJD 60205.150
---- 16.66± 0.05-M33-013424.78 in filter R on MJD 60205.150
----
60227.12 16.88± 0.04-M33-013424.78 in filter V on MJD 60227.120
-------- 16.56± 0.06-M33-013424.78 in filter I on MJD 60227.120
60262.13 16.93± 0.04-M33-013424.78 in filter V on MJD 60262.130
 17.07± 0.04-M33-013424.78 in filter B on MJD 60262.130
 16.77± 0.04-M33-013424.78 in filter R on MJD 60262.130
----
60290.15 16.81± 0.04-M33-013424.78 in filter V on MJD 60290.150
 16.96± 0.05-M33-013424.78 in filter B on MJD 60290.150
---- 16.48± 0.06-M33-013424.78 in filter I on MJD 60290.150
60292.18 16.83± 0.04-M33-013424.78 in filter V on MJD 60292.180
---- 16.67± 0.05-M33-013424.78 in filter R on MJD 60292.180
----
60342.08 16.96± 0.04-M33-013424.78 in filter V on MJD 60342.080
---- 16.77± 0.05-M33-013424.78 in filter R on MJD 60342.080
----
60504.38 16.93± 0.04-M33-013424.78 in filter V on MJD 60504.380
 17.08± 0.04-M33-013424.78 in filter B on MJD 60504.380
 16.76± 0.05-M33-013424.78 in filter R on MJD 60504.380
----
60529.36 16.98± 0.04-M33-013424.78 in filter V on MJD 60529.360
-------- 16.59± 0.06-M33-013424.78 in filter I on MJD 60529.360
60556.24 16.88± 0.04-M33-013424.78 in filter V on MJD 60556.240
 17.01± 0.05-M33-013424.78 in filter B on MJD 60556.240
 16.73± 0.04-M33-013424.78 in filter R on MJD 60556.240
----
60594.10 16.86± 0.05-M33-013424.78 in filter V on MJD 60594.100
-------- 16.61± 0.06-M33-013424.78 in filter I on MJD 60594.100
60612.14 16.88± 0.05-M33-013424.78 in filter V on MJD 60612.140
---- 16.70± 0.05-M33-013424.78 in filter R on MJD 60612.140
----
60651.14 16.95± 0.04-M33-013424.78 in filter V on MJD 60651.140
 17.10± 0.05-M33-013424.78 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 M33-013424.78Plot of color for M33-013424.78

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 [0.32 mag]B [0.31 mag]R [0.30 mag]
B [0.31 mag]0.86 (34)
R [0.30 mag]0.92 (36)0.77 (20)
I [0.35 mag]0.73 (20)0.76 (7)0.73 (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 M33-013424.78

Plot to assess correlation between bands for M33-013424.78

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)		2.45 | 0.72
R
(I|R)		3.02 | 1.082.11 | 0.18
I
(I|R)		2.84 | 1.122.75 | 0.832.01 | 1.53

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