Color composite thumbnail image of M33C-21192M33C-21192 (J013432.74+304709.6)



Target Notes

Color composite thumbnail image of M33C-21192

Classification: Of/late-WN

(Candidate LBV) On the edge of massive HII region NGC 604. The target is at least 1 magnitude brighter than but unresolved from the 8 other LGGS stars within 2 arcseconds. Measurements are marked "B" by default and marked "X" if there are additional problems with the PSF fit.

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 16.08± 0.06BM33C-21192 in filter V on MJD  56140.370
---- 16.13± 0.09BM33C-21192 in filter R on MJD  56140.370
----
56599.17 15.86± 0.05XM33C-21192 in filter V on MJD  56599.170
16.33± 0.08XM33C-21192 in filter B on MJD  56599.170
15.82± 0.06BM33C-21192 in filter R on MJD  56599.170
----
56976.16 16.00± 0.04BM33C-21192 in filter V on MJD  56976.160
15.83± 0.06BM33C-21192 in filter B on MJD  56976.160
15.73± 0.05BM33C-21192 in filter R on MJD  56976.160
----
57038.13 15.99± 0.05BM33C-21192 in filter V on MJD  57038.130
15.85± 0.05BM33C-21192 in filter B on MJD  57038.130
15.78± 0.05BM33C-21192 in filter R on MJD  57038.130
----
57310.13 15.75± 0.05XM33C-21192 in filter V on MJD  57310.130
15.83± 0.07XM33C-21192 in filter B on MJD  57310.130
16.15± 0.05XM33C-21192 in filter R on MJD  57310.130
----
57335.18 15.98± 0.06BM33C-21192 in filter V on MJD  57335.180
---- 15.26± 0.06XM33C-21192 in filter R on MJD  57335.180
----
57401.10 15.97± 0.05BM33C-21192 in filter V on MJD  57401.100
15.84± 0.05BM33C-21192 in filter B on MJD  57401.100
--------
57634.34 15.95± 0.05BM33C-21192 in filter V on MJD  57634.340
16.13± 0.07XM33C-21192 in filter B on MJD  57634.340
15.79± 0.05BM33C-21192 in filter R on MJD  57634.340
15.82± 0.06BM33C-21192 in filter I on MJD  57634.340
57687.13 15.86± 0.05BM33C-21192 in filter V on MJD  57687.130
15.94± 0.06BM33C-21192 in filter B on MJD  57687.130
16.36± 0.06XM33C-21192 in filter R on MJD  57687.130
15.82± 0.07BM33C-21192 in filter I on MJD  57687.130
57964.37 15.99± 0.04BM33C-21192 in filter V on MJD  57964.370
15.85± 0.06BM33C-21192 in filter B on MJD  57964.370
15.83± 0.05BM33C-21192 in filter R on MJD  57964.370
15.75± 0.06BM33C-21192 in filter I on MJD  57964.370
58045.15 15.86± 0.05BM33C-21192 in filter V on MJD  58045.150
16.53± 0.07XM33C-21192 in filter B on MJD  58045.150
15.95± 0.04BM33C-21192 in filter R on MJD  58045.150
----
58073.18 15.88± 0.04BM33C-21192 in filter V on MJD  58073.180
15.97± 0.06BM33C-21192 in filter B on MJD  58073.180
--------
58103.16 15.92± 0.05ABM33C-21192 in filter V on MJD  58103.160
M33C-21192 in filter V on MJD  58103.160
-------- 15.91± 0.07BM33C-21192 in filter I on MJD  58103.160
58312.39 16.03± 0.05BM33C-21192 in filter V on MJD  58312.390
15.88± 0.07BM33C-21192 in filter B on MJD  58312.390
--------
58316.38 15.85± 0.03BM33C-21192 in filter V on MJD  58316.380
16.30± 0.06XM33C-21192 in filter B on MJD  58316.380
15.92± 0.04BM33C-21192 in filter R on MJD  58316.380
15.90± 0.04BM33C-21192 in filter I on MJD  58316.380
58317.38 16.11± 0.06ABM33C-21192 in filter V on MJD  58317.380
M33C-21192 in filter V on MJD  58317.380
15.94± 0.06BM33C-21192 in filter B on MJD  58317.380
M33C-21192 in filter B on MJD  58317.380
15.81± 0.06ABM33C-21192 in filter R on MJD  58317.380
M33C-21192 in filter R on MJD  58317.380
M33C-21192 in filter R on MJD  58317.380
----
58341.38 16.18± 0.06ABM33C-21192 in filter V on MJD  58341.380
M33C-21192 in filter V on MJD  58341.380
16.09± 0.08BM33C-21192 in filter B on MJD  58341.380
16.12± 0.08BM33C-21192 in filter R on MJD  58341.380
16.04± 0.09ABM33C-21192 in filter I on MJD  58341.380
M33C-21192 in filter I on MJD  58341.380
58342.38 16.18± 0.04ABM33C-21192 in filter V on MJD  58342.380
M33C-21192 in filter V on MJD  58342.380
16.05± 0.07ABM33C-21192 in filter B on MJD  58342.380
M33C-21192 in filter B on MJD  58342.380
M33C-21192 in filter B on MJD  58342.380
15.92± 0.04ABM33C-21192 in filter R on MJD  58342.380
M33C-21192 in filter R on MJD  58342.380
M33C-21192 in filter R on MJD  58342.380
15.91± 0.04BM33C-21192 in filter I on MJD  58342.380
M33C-21192 in filter I on MJD  58342.380
M33C-21192 in filter I on MJD  58342.380
58420.06 16.20± 0.04BM33C-21192 in filter V on MJD  58420.060
16.11± 0.06BM33C-21192 in filter B on MJD  58420.060
15.91± 0.04BM33C-21192 in filter R on MJD  58420.060
15.85± 0.06BM33C-21192 in filter I on MJD  58420.060
58433.00 16.15± 0.05BM33C-21192 in filter V on MJD  58433.000
---- 15.72± 0.06BM33C-21192 in filter R on MJD  58433.000
15.96± 0.06BM33C-21192 in filter I on MJD  58433.000
58672.39 15.79± 0.07BM33C-21192 in filter V on MJD  58672.390
---- 15.59± 0.06BM33C-21192 in filter R on MJD  58672.390
15.52± 0.08BM33C-21192 in filter I on MJD  58672.390
58695.36 15.90± 0.05BM33C-21192 in filter V on MJD  58695.360
15.73± 0.06BM33C-21192 in filter B on MJD  58695.360
15.86± 0.05BM33C-21192 in filter R on MJD  58695.360
----
58696.39 15.96± 0.04BM33C-21192 in filter V on MJD  58696.390
15.87± 0.06BM33C-21192 in filter B on MJD  58696.390
M33C-21192 in filter B on MJD  58696.390
15.86± 0.05BM33C-21192 in filter R on MJD  58696.390
M33C-21192 in filter R on MJD  58696.390
----
58779.15 15.91± 0.06BM33C-21192 in filter V on MJD  58779.150
---- 15.36± 0.05BM33C-21192 in filter R on MJD  58779.150
15.59± 0.09BM33C-21192 in filter I on MJD  58779.150
58784.12 15.94± 0.06BM33C-21192 in filter V on MJD  58784.120
15.85± 0.06BM33C-21192 in filter B on MJD  58784.120
--------
58812.22 15.76± 0.04BM33C-21192 in filter V on MJD  58812.220
-------- 15.54± 0.06BM33C-21192 in filter I on MJD  58812.220
58902.06 16.05± 0.04ABM33C-21192 in filter V on MJD  58902.060
M33C-21192 in filter V on MJD  58902.060
---- 15.93± 0.05BM33C-21192 in filter R on MJD  58902.060
15.99± 0.08BM33C-21192 in filter I on MJD  58902.060
59056.38 16.12± 0.04BM33C-21192 in filter V on MJD  59056.380
15.91± 0.06BM33C-21192 in filter B on MJD  59056.380
15.78± 0.05BM33C-21192 in filter R on MJD  59056.380
16.02± 0.08BM33C-21192 in filter I on MJD  59056.380
59059.38 16.05± 0.05BM33C-21192 in filter V on MJD  59059.380
16.02± 0.06BM33C-21192 in filter B on MJD  59059.380
--------
59081.30 15.95± 0.05ABM33C-21192 in filter V on MJD  59081.300
M33C-21192 in filter V on MJD  59081.300
16.15± 0.07BM33C-21192 in filter B on MJD  59081.300
15.77± 0.05ABM33C-21192 in filter R on MJD  59081.300
M33C-21192 in filter R on MJD  59081.300
----
59082.35 15.89± 0.05BM33C-21192 in filter V on MJD  59082.350
15.87± 0.07BM33C-21192 in filter B on MJD  59082.350
M33C-21192 in filter B on MJD  59082.350
15.92± 0.06BM33C-21192 in filter R on MJD  59082.350
M33C-21192 in filter R on MJD  59082.350
M33C-21192 in filter R on MJD  59082.350
----
59084.34-------- 15.85± 0.05TBM33C-21192 in filter R on MJD  59084.340
----
59161.07 15.96± 0.05BM33C-21192 in filter V on MJD  59161.070
15.74± 0.06BM33C-21192 in filter B on MJD  59161.070
15.67± 0.05BM33C-21192 in filter R on MJD  59161.070
----
59171.08 15.89± 0.06ABM33C-21192 in filter V on MJD  59171.080
M33C-21192 in filter V on MJD  59171.080
15.75± 0.07BM33C-21192 in filter B on MJD  59171.080
15.81± 0.07BM33C-21192 in filter R on MJD  59171.080
15.69± 0.08ABM33C-21192 in filter I on MJD  59171.080
M33C-21192 in filter I on MJD  59171.080
59227.07 15.98± 0.05ABM33C-21192 in filter V on MJD  59227.070
M33C-21192 in filter V on MJD  59227.070
15.94± 0.06ABM33C-21192 in filter B on MJD  59227.070
M33C-21192 in filter B on MJD  59227.070
15.80± 0.06ABM33C-21192 in filter R on MJD  59227.070
M33C-21192 in filter R on MJD  59227.070
----
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-21192Plot of color for M33C-21192

Key for Plot Variability Photometry Table Target Notes


Variability

Plot/Graph Photometry Table Target Notes

From the data available in this survey, it is not possible to tell with certainty if 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 [0.42 mag]B [0.44 mag]R [0.77 mag]
B [0.42 mag]0.30 (21)
R [0.77 mag]0.14 (23)0.24 (15)
I [0.51 mag]0.55 (15)0.40 (7)0.53 (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 M33C-21192

Plot to assess correlation between bands for M33C-21192

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)
2.07 | 0.83
R
(I|R)
1.59 | 0.981.51 | 0.94
I
(I|R)
4.81 | 1.441.92 | 1.144.95 | 1.40

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