Color composite thumbnail image of M33C-19725M33C-19725 (J013339.52+304540.5)



Target Notes

Color composite thumbnail image of M33C-19725

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
56140.39 17.31± 0.04-M33C-19725 in filter V on MJD  56140.390
---- 17.15± 0.10-M33C-19725 in filter R on MJD  56140.390
----
56593.16 17.27± 0.03-M33C-19725 in filter V on MJD  56593.160
17.37± 0.03-M33C-19725 in filter B on MJD  56593.160
--------
56599.18 17.18± 0.04AM33C-19725 in filter V on MJD  56599.180
M33C-19725 in filter V on MJD  56599.180
17.25± 0.05AM33C-19725 in filter B on MJD  56599.180
M33C-19725 in filter B on MJD  56599.180
16.93± 0.06AM33C-19725 in filter R on MJD  56599.180
M33C-19725 in filter R on MJD  56599.180
----
56976.19 17.00± 0.04-M33C-19725 in filter V on MJD  56976.190
17.10± 0.04-M33C-19725 in filter B on MJD  56976.190
16.77± 0.06-M33C-19725 in filter R on MJD  56976.190
----
57328.16 17.14± 0.03-M33C-19725 in filter V on MJD  57328.160
17.20± 0.04-M33C-19725 in filter B on MJD  57328.160
16.91± 0.04-M33C-19725 in filter R on MJD  57328.160
----
57634.36 17.52± 0.05AM33C-19725 in filter V on MJD  57634.360
M33C-19725 in filter V on MJD  57634.360
17.54± 0.06AM33C-19725 in filter B on MJD  57634.360
M33C-19725 in filter B on MJD  57634.360
17.29± 0.06AM33C-19725 in filter R on MJD  57634.360
M33C-19725 in filter R on MJD  57634.360
17.27± 0.08AM33C-19725 in filter I on MJD  57634.360
M33C-19725 in filter I on MJD  57634.360
57687.13 17.31± 0.05-M33C-19725 in filter V on MJD  57687.130
17.30± 0.06-M33C-19725 in filter B on MJD  57687.130
17.05± 0.05-M33C-19725 in filter R on MJD  57687.130
17.01± 0.07-M33C-19725 in filter I on MJD  57687.130
57964.37 17.57± 0.04-M33C-19725 in filter V on MJD  57964.370
17.61± 0.06-M33C-19725 in filter B on MJD  57964.370
17.32± 0.05-M33C-19725 in filter R on MJD  57964.370
17.33± 0.06-M33C-19725 in filter I on MJD  57964.370
57988.41 17.21± 0.05-M33C-19725 in filter V on MJD  57988.410
17.26± 0.04-M33C-19725 in filter B on MJD  57988.410
--------
58043.10 17.36± 0.04-M33C-19725 in filter V on MJD  58043.100
---- 17.10± 0.04-M33C-19725 in filter R on MJD  58043.100
17.10± 0.07-M33C-19725 in filter I on MJD  58043.100
58045.15 17.40± 0.05-M33C-19725 in filter V on MJD  58045.150
17.41± 0.07-M33C-19725 in filter B on MJD  58045.150
17.12± 0.04-M33C-19725 in filter R on MJD  58045.150
----
58073.18 17.23± 0.04-M33C-19725 in filter V on MJD  58073.180
17.21± 0.06-M33C-19725 in filter B on MJD  58073.180
--------
58103.16 17.10± 0.04AM33C-19725 in filter V on MJD  58103.160
M33C-19725 in filter V on MJD  58103.160
17.18± 0.04-M33C-19725 in filter B on MJD  58103.160
---- 16.81± 0.06-M33C-19725 in filter I on MJD  58103.160
58108.14 17.29± 0.05-M33C-19725 in filter V on MJD  58108.140
17.38± 0.06-M33C-19725 in filter B on MJD  58108.140
---- 17.06± 0.08-M33C-19725 in filter I on MJD  58108.140
58317.39 17.21± 0.04-M33C-19725 in filter V on MJD  58317.390
---- 17.01± 0.07-M33C-19725 in filter R on MJD  58317.390
----
58341.40 17.41± 0.05-M33C-19725 in filter V on MJD  58341.400
17.43± 0.08-M33C-19725 in filter B on MJD  58341.400
17.21± 0.07-M33C-19725 in filter R on MJD  58341.400
17.23± 0.10-M33C-19725 in filter I on MJD  58341.400
58342.36 17.43± 0.04-M33C-19725 in filter V on MJD  58342.360
17.48± 0.06-M33C-19725 in filter B on MJD  58342.360
M33C-19725 in filter B on MJD  58342.360
17.22± 0.04-M33C-19725 in filter R on MJD  58342.360
M33C-19725 in filter R on MJD  58342.360
17.20± 0.05-M33C-19725 in filter I on MJD  58342.360
M33C-19725 in filter I on MJD  58342.360
58403.15 17.16± 0.04-M33C-19725 in filter V on MJD  58403.150
-------- 16.85± 0.09-M33C-19725 in filter I on MJD  58403.150
58420.06 17.17± 0.04-M33C-19725 in filter V on MJD  58420.060
17.17± 0.06-M33C-19725 in filter B on MJD  58420.060
16.90± 0.04-M33C-19725 in filter R on MJD  58420.060
16.89± 0.07-M33C-19725 in filter I on MJD  58420.060
58673.38 17.40± 0.03-M33C-19725 in filter V on MJD  58673.380
17.50± 0.04-M33C-19725 in filter B on MJD  58673.380
--------
58696.39 17.08± 0.04-M33C-19725 in filter V on MJD  58696.390
17.10± 0.06-M33C-19725 in filter B on MJD  58696.390
16.90± 0.04-M33C-19725 in filter R on MJD  58696.390
----
58750.19 17.15± 0.03-M33C-19725 in filter V on MJD  58750.190
---- 16.91± 0.05-M33C-19725 in filter R on MJD  58750.190
----
58779.15 17.11± 0.04-M33C-19725 in filter V on MJD  58779.150
---- 16.89± 0.05-M33C-19725 in filter R on MJD  58779.150
16.88± 0.07-M33C-19725 in filter I on MJD  58779.150
58902.05 17.24± 0.03-M33C-19725 in filter V on MJD  58902.050
-------- 17.04± 0.08-M33C-19725 in filter I on MJD  58902.050
59056.38 17.71± 0.04-M33C-19725 in filter V on MJD  59056.380
17.79± 0.06-M33C-19725 in filter B on MJD  59056.380
17.36± 0.05-M33C-19725 in filter R on MJD  59056.380
17.39± 0.08-M33C-19725 in filter I on MJD  59056.380
59082.34 17.12± 0.03AM33C-19725 in filter V on MJD  59082.340
M33C-19725 in filter V on MJD  59082.340
17.17± 0.05AM33C-19725 in filter B on MJD  59082.340
M33C-19725 in filter B on MJD  59082.340
16.93± 0.05AM33C-19725 in filter R on MJD  59082.340
M33C-19725 in filter R on MJD  59082.340
----
59084.29-------- 16.85± 0.06TM33C-19725 in filter R on MJD  59084.290
----
59161.11 17.09± 0.03-M33C-19725 in filter V on MJD  59161.110
17.18± 0.03-M33C-19725 in filter B on MJD  59161.110
16.88± 0.04-M33C-19725 in filter R on MJD  59161.110
----
59171.09 17.39± 0.04AM33C-19725 in filter V on MJD  59171.090
M33C-19725 in filter V on MJD  59171.090
17.41± 0.05AM33C-19725 in filter B on MJD  59171.090
M33C-19725 in filter B on MJD  59171.090
17.11± 0.05-M33C-19725 in filter R on MJD  59171.090
17.13± 0.08AM33C-19725 in filter I on MJD  59171.090
M33C-19725 in filter I on MJD  59171.090
59227.08 17.08± 0.03AM33C-19725 in filter V on MJD  59227.080
M33C-19725 in filter V on MJD  59227.080
17.10± 0.04AM33C-19725 in filter B on MJD  59227.080
M33C-19725 in filter B on MJD  59227.080
16.88± 0.05-M33C-19725 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 M33C-19725Plot of color for M33C-19725

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 [0.69 mag]B [0.71 mag]R [0.59 mag]
B [0.69 mag]0.96 (22)
R [0.59 mag]0.96 (21)0.93 (16)
I [0.59 mag]0.95 (14)0.92 (10)0.98 (10)

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 M33C-19725

Plot to assess correlation between bands for M33C-19725

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)
16.87 | 0.78
R
(I|R)
15.64 | 1.3710.85 | 0.63
I
(I|R)
10.41 | 1.688.89 | 1.167.93 | 1.44

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