Color composite thumbnail image of M33-013422.91M33-013422.91 (J013422.91+304411.0)



Target Notes

Color composite thumbnail image of M33-013422.91

Classification: OB-Supergiant

Unresolved from J013422.89+304410.9 of comparable brightness 0.3 arcseconds away.

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 16.99± 0.06BM33-013422.91 in filter V on MJD  56140.370
---- 17.03± 0.10BM33-013422.91 in filter R on MJD  56140.370
----
56599.17 17.06± 0.05BM33-013422.91 in filter V on MJD  56599.170
17.16± 0.07BM33-013422.91 in filter B on MJD  56599.170
16.91± 0.06BM33-013422.91 in filter R on MJD  56599.170
----
56976.16 17.09± 0.04BM33-013422.91 in filter V on MJD  56976.160
17.15± 0.06BM33-013422.91 in filter B on MJD  56976.160
16.95± 0.05BM33-013422.91 in filter R on MJD  56976.160
----
57038.13 17.09± 0.04BM33-013422.91 in filter V on MJD  57038.130
17.16± 0.05BM33-013422.91 in filter B on MJD  57038.130
16.95± 0.04BM33-013422.91 in filter R on MJD  57038.130
----
57310.13 17.07± 0.05BM33-013422.91 in filter V on MJD  57310.130
17.12± 0.07BM33-013422.91 in filter B on MJD  57310.130
16.89± 0.05BM33-013422.91 in filter R on MJD  57310.130
----
57335.18 17.06± 0.06BM33-013422.91 in filter V on MJD  57335.180
---- 16.88± 0.05BM33-013422.91 in filter R on MJD  57335.180
----
57401.10 17.03± 0.04BM33-013422.91 in filter V on MJD  57401.100
17.08± 0.05BM33-013422.91 in filter B on MJD  57401.100
--------
57634.34 17.00± 0.05BM33-013422.91 in filter V on MJD  57634.340
17.08± 0.07BM33-013422.91 in filter B on MJD  57634.340
16.88± 0.05BM33-013422.91 in filter R on MJD  57634.340
16.74± 0.06BM33-013422.91 in filter I on MJD  57634.340
57687.13 17.04± 0.05BM33-013422.91 in filter V on MJD  57687.130
17.08± 0.06BM33-013422.91 in filter B on MJD  57687.130
16.91± 0.05BM33-013422.91 in filter R on MJD  57687.130
16.75± 0.07BM33-013422.91 in filter I on MJD  57687.130
57964.35 16.89± 0.04ABM33-013422.91 in filter V on MJD  57964.350
M33-013422.91 in filter V on MJD  57964.350
16.95± 0.06ABM33-013422.91 in filter B on MJD  57964.350
M33-013422.91 in filter B on MJD  57964.350
16.72± 0.05ABM33-013422.91 in filter R on MJD  57964.350
M33-013422.91 in filter R on MJD  57964.350
16.58± 0.06ABM33-013422.91 in filter I on MJD  57964.350
M33-013422.91 in filter I on MJD  57964.350
58045.16 16.99± 0.05ABM33-013422.91 in filter V on MJD  58045.160
M33-013422.91 in filter V on MJD  58045.160
17.07± 0.07ABM33-013422.91 in filter B on MJD  58045.160
M33-013422.91 in filter B on MJD  58045.160
16.82± 0.05ABM33-013422.91 in filter R on MJD  58045.160
M33-013422.91 in filter R on MJD  58045.160
----
58073.19 16.93± 0.04ABM33-013422.91 in filter V on MJD  58073.190
M33-013422.91 in filter V on MJD  58073.190
16.98± 0.06ABM33-013422.91 in filter B on MJD  58073.190
M33-013422.91 in filter B on MJD  58073.190
--------
58103.16 16.95± 0.04ABM33-013422.91 in filter V on MJD  58103.160
M33-013422.91 in filter V on MJD  58103.160
M33-013422.91 in filter V on MJD  58103.160
17.01± 0.04BM33-013422.91 in filter B on MJD  58103.160
---- 16.64± 0.06BM33-013422.91 in filter I on MJD  58103.160
58108.13 16.94± 0.05ABM33-013422.91 in filter V on MJD  58108.130
M33-013422.91 in filter V on MJD  58108.130
16.96± 0.07ABM33-013422.91 in filter B on MJD  58108.130
M33-013422.91 in filter B on MJD  58108.130
---- 16.66± 0.08ABM33-013422.91 in filter I on MJD  58108.130
M33-013422.91 in filter I on MJD  58108.130
58312.39 16.98± 0.05BM33-013422.91 in filter V on MJD  58312.390
17.02± 0.07BM33-013422.91 in filter B on MJD  58312.390
--------
58316.38 16.98± 0.03BM33-013422.91 in filter V on MJD  58316.380
17.09± 0.05BM33-013422.91 in filter B on MJD  58316.380
16.84± 0.03BM33-013422.91 in filter R on MJD  58316.380
16.69± 0.04BM33-013422.91 in filter I on MJD  58316.380
58317.37 16.98± 0.04BM33-013422.91 in filter V on MJD  58317.370
17.02± 0.06BM33-013422.91 in filter B on MJD  58317.370
M33-013422.91 in filter B on MJD  58317.370
16.81± 0.04BM33-013422.91 in filter R on MJD  58317.370
M33-013422.91 in filter R on MJD  58317.370
----
58341.34 17.00± 0.07BM33-013422.91 in filter V on MJD  58341.340
-------- 16.71± 0.07BM33-013422.91 in filter I on MJD  58341.340
58342.38 16.98± 0.04ABM33-013422.91 in filter V on MJD  58342.380
M33-013422.91 in filter V on MJD  58342.380
17.05± 0.06ABM33-013422.91 in filter B on MJD  58342.380
M33-013422.91 in filter B on MJD  58342.380
16.83± 0.04ABM33-013422.91 in filter R on MJD  58342.380
M33-013422.91 in filter R on MJD  58342.380
16.73± 0.05BM33-013422.91 in filter I on MJD  58342.380
M33-013422.91 in filter I on MJD  58342.380
58375.14 17.01± 0.04BM33-013422.91 in filter V on MJD  58375.140
---- 16.85± 0.05BM33-013422.91 in filter R on MJD  58375.140
----
58420.08 16.95± 0.04ABM33-013422.91 in filter V on MJD  58420.080
M33-013422.91 in filter V on MJD  58420.080
16.98± 0.06ABM33-013422.91 in filter B on MJD  58420.080
M33-013422.91 in filter B on MJD  58420.080
16.84± 0.04BM33-013422.91 in filter R on MJD  58420.080
16.67± 0.07ABM33-013422.91 in filter I on MJD  58420.080
M33-013422.91 in filter I on MJD  58420.080
58433.00 17.06± 0.05BM33-013422.91 in filter V on MJD  58433.000
---- 16.90± 0.05BM33-013422.91 in filter R on MJD  58433.000
16.79± 0.07BM33-013422.91 in filter I on MJD  58433.000
58672.39 17.07± 0.07BM33-013422.91 in filter V on MJD  58672.390
---- 16.86± 0.06BM33-013422.91 in filter R on MJD  58672.390
16.62± 0.09BM33-013422.91 in filter I on MJD  58672.390
58695.36 17.07± 0.05BM33-013422.91 in filter V on MJD  58695.360
17.08± 0.05BM33-013422.91 in filter B on MJD  58695.360
16.89± 0.04BM33-013422.91 in filter R on MJD  58695.360
----
58696.39 17.03± 0.04BM33-013422.91 in filter V on MJD  58696.390
17.07± 0.06BM33-013422.91 in filter B on MJD  58696.390
M33-013422.91 in filter B on MJD  58696.390
16.85± 0.04BM33-013422.91 in filter R on MJD  58696.390
M33-013422.91 in filter R on MJD  58696.390
----
58779.15 17.03± 0.04BM33-013422.91 in filter V on MJD  58779.150
---- 16.83± 0.05BM33-013422.91 in filter R on MJD  58779.150
16.62± 0.07BM33-013422.91 in filter I on MJD  58779.150
58784.12 17.17± 0.05BM33-013422.91 in filter V on MJD  58784.120
17.21± 0.05BM33-013422.91 in filter B on MJD  58784.120
--------
58812.22 17.06± 0.04BM33-013422.91 in filter V on MJD  58812.220
-------- 16.78± 0.05BM33-013422.91 in filter I on MJD  58812.220
58902.06 17.07± 0.03ABM33-013422.91 in filter V on MJD  58902.060
M33-013422.91 in filter V on MJD  58902.060
---- 16.91± 0.04BM33-013422.91 in filter R on MJD  58902.060
16.65± 0.08BM33-013422.91 in filter I on MJD  58902.060
59056.38 17.02± 0.04BM33-013422.91 in filter V on MJD  59056.380
17.08± 0.06BM33-013422.91 in filter B on MJD  59056.380
16.77± 0.05BM33-013422.91 in filter R on MJD  59056.380
16.67± 0.07BM33-013422.91 in filter I on MJD  59056.380
59059.38 17.00± 0.05BM33-013422.91 in filter V on MJD  59059.380
17.02± 0.06BM33-013422.91 in filter B on MJD  59059.380
--------
59081.30 17.12± 0.04ABM33-013422.91 in filter V on MJD  59081.300
M33-013422.91 in filter V on MJD  59081.300
17.16± 0.06BM33-013422.91 in filter B on MJD  59081.300
16.98± 0.04ABM33-013422.91 in filter R on MJD  59081.300
M33-013422.91 in filter R on MJD  59081.300
----
59082.34 17.14± 0.03ABM33-013422.91 in filter V on MJD  59082.340
M33-013422.91 in filter V on MJD  59082.340
17.18± 0.05ABM33-013422.91 in filter B on MJD  59082.340
M33-013422.91 in filter B on MJD  59082.340
M33-013422.91 in filter B on MJD  59082.340
16.99± 0.05ABM33-013422.91 in filter R on MJD  59082.340
M33-013422.91 in filter R on MJD  59082.340
M33-013422.91 in filter R on MJD  59082.340
M33-013422.91 in filter R on MJD  59082.340
----
59084.34-------- 16.98± 0.04TBM33-013422.91 in filter R on MJD  59084.340
----
59161.09 17.15± 0.04ABM33-013422.91 in filter V on MJD  59161.090
M33-013422.91 in filter V on MJD  59161.090
17.21± 0.05ABM33-013422.91 in filter B on MJD  59161.090
M33-013422.91 in filter B on MJD  59161.090
17.00± 0.04ABM33-013422.91 in filter R on MJD  59161.090
M33-013422.91 in filter R on MJD  59161.090
----
59171.09 17.11± 0.04ABM33-013422.91 in filter V on MJD  59171.090
M33-013422.91 in filter V on MJD  59171.090
M33-013422.91 in filter V on MJD  59171.090
17.23± 0.05ABM33-013422.91 in filter B on MJD  59171.090
M33-013422.91 in filter B on MJD  59171.090
16.87± 0.05BM33-013422.91 in filter R on MJD  59171.090
16.89± 0.07ABM33-013422.91 in filter I on MJD  59171.090
M33-013422.91 in filter I on MJD  59171.090
M33-013422.91 in filter I on MJD  59171.090
59227.08 17.04± 0.03ABM33-013422.91 in filter V on MJD  59227.080
M33-013422.91 in filter V on MJD  59227.080
M33-013422.91 in filter V on MJD  59227.080
17.09± 0.04ABM33-013422.91 in filter B on MJD  59227.080
M33-013422.91 in filter B on MJD  59227.080
M33-013422.91 in filter B on MJD  59227.080
16.88± 0.05ABM33-013422.91 in filter R on MJD  59227.080
M33-013422.91 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 M33-013422.91Plot of color for M33-013422.91

Key for Plot Variability Photometry Table Target Notes


Variability

Plot/Graph Photometry Table Target Notes

It is 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 [0.29 mag]B [0.28 mag]R [0.31 mag]
B [0.29 mag]0.90 (27)
R [0.31 mag]0.48 (27)0.60 (20)
I [0.30 mag]0.36 (16)0.83 (10)0.26 (12)

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 M33-013422.91

Plot to assess correlation between bands for M33-013422.91

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)
2.25 | 0.81
R
(I|R)
1.72 | 1.042.06 | 0.20
I
(I|R)
0.97 | 1.181.54 | 1.190.74 | 0.89

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