Color composite thumbnail image of M33C-15894M33C-15894 (J013332.97+304136.1)



Target Notes

Color composite thumbnail image of M33C-15894

Classification: Of/late-WN

Fourteen LGGS stars within 5 arcseconds. Most are >1 magnitude fainter. One of comparable brightness resolved 4.4 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
56140.39 17.79± 0.05bM33C-15894 in filter V on MJD  56140.390
---- 17.82± 0.17bM33C-15894 in filter R on MJD  56140.390
----
56593.16 17.89± 0.04bM33C-15894 in filter V on MJD  56593.160
17.74± 0.04bM33C-15894 in filter B on MJD  56593.160
--------
56599.19 17.82± 0.05bM33C-15894 in filter V on MJD  56599.190
17.66± 0.04bM33C-15894 in filter B on MJD  56599.190
> 17.94bM33C-15894 in filter R on MJD  56599.190
----
56976.19 17.54± 0.04bM33C-15894 in filter V on MJD  56976.190
17.71± 0.05bM33C-15894 in filter B on MJD  56976.190
17.48± 0.07bM33C-15894 in filter R on MJD  56976.190
----
57328.16 17.77± 0.04bM33C-15894 in filter V on MJD  57328.160
17.66± 0.05bM33C-15894 in filter B on MJD  57328.160
17.54± 0.04bM33C-15894 in filter R on MJD  57328.160
----
57406.10 17.72± 0.07bM33C-15894 in filter V on MJD  57406.100
17.62± 0.07bM33C-15894 in filter B on MJD  57406.100
17.49± 0.06bM33C-15894 in filter R on MJD  57406.100
17.61± 0.12bM33C-15894 in filter I on MJD  57406.100
57634.38 17.85± 0.05bM33C-15894 in filter V on MJD  57634.380
17.58± 0.05bM33C-15894 in filter B on MJD  57634.380
17.88± 0.08bM33C-15894 in filter R on MJD  57634.380
17.64± 0.10bM33C-15894 in filter I on MJD  57634.380
57988.41 17.77± 0.05bM33C-15894 in filter V on MJD  57988.410
18.05± 0.10bM33C-15894 in filter B on MJD  57988.410
--------
58043.10 17.74± 0.05bM33C-15894 in filter V on MJD  58043.100
---- 17.42± 0.05bM33C-15894 in filter R on MJD  58043.100
17.39± 0.08bM33C-15894 in filter I on MJD  58043.100
58103.17 17.77± 0.06bM33C-15894 in filter V on MJD  58103.170
17.76± 0.05bM33C-15894 in filter B on MJD  58103.170
--------
58108.14 17.77± 0.06bM33C-15894 in filter V on MJD  58108.140
17.66± 0.07bM33C-15894 in filter B on MJD  58108.140
---- 17.62± 0.09bM33C-15894 in filter I on MJD  58108.140
58317.39 17.73± 0.05bM33C-15894 in filter V on MJD  58317.390
---- 17.63± 0.08bM33C-15894 in filter R on MJD  58317.390
----
58341.40 17.89± 0.06bM33C-15894 in filter V on MJD  58341.400
17.77± 0.09bM33C-15894 in filter B on MJD  58341.400
17.74± 0.08bM33C-15894 in filter R on MJD  58341.400
17.93± 0.11bM33C-15894 in filter I on MJD  58341.400
58373.15 17.71± 0.06bM33C-15894 in filter V on MJD  58373.150
17.58± 0.07bM33C-15894 in filter B on MJD  58373.150
--------
58433.00 17.93± 0.07bM33C-15894 in filter V on MJD  58433.000
---- 17.69± 0.06bM33C-15894 in filter R on MJD  58433.000
17.64± 0.09bM33C-15894 in filter I on MJD  58433.000
58673.38 17.82± 0.05bM33C-15894 in filter V on MJD  58673.380
17.85± 0.05bM33C-15894 in filter B on MJD  58673.380
--------
58750.19 17.83± 0.05bM33C-15894 in filter V on MJD  58750.190
---- 17.65± 0.06bM33C-15894 in filter R on MJD  58750.190
----
58779.18 17.46± 0.04bM33C-15894 in filter V on MJD  58779.180
17.58± 0.11bM33C-15894 in filter B on MJD  58779.180
--------
58902.05 18.56± 0.07XM33C-15894 in filter V on MJD  58902.050
-------- 17.54± 0.09bM33C-15894 in filter I on MJD  58902.050
59056.38 17.93± 0.06bM33C-15894 in filter V on MJD  59056.380
17.75± 0.06bM33C-15894 in filter B on MJD  59056.380
17.67± 0.06bM33C-15894 in filter R on MJD  59056.380
17.69± 0.09bM33C-15894 in filter I on MJD  59056.380
59082.32 18.18± 0.04bM33C-15894 in filter V on MJD  59082.320
17.67± 0.04bM33C-15894 in filter B on MJD  59082.320
17.72± 0.05bM33C-15894 in filter R on MJD  59082.320
----
59084.29-------- 17.61± 0.06TbM33C-15894 in filter R on MJD  59084.290
----
59161.11 17.80± 0.03bM33C-15894 in filter V on MJD  59161.110
17.62± 0.05bM33C-15894 in filter B on MJD  59161.110
17.77± 0.06bM33C-15894 in filter R on MJD  59161.110
----
59171.11 17.63± 0.04AbM33C-15894 in filter V on MJD  59171.110
M33C-15894 in filter V on MJD  59171.110
17.66± 0.04bM33C-15894 in filter B on MJD  59171.110
---- 17.63± 0.08AbM33C-15894 in filter I on MJD  59171.110
M33C-15894 in filter I on MJD  59171.110
59227.10 18.11± 0.09bM33C-15894 in filter V on MJD  59227.100
17.62± 0.04bM33C-15894 in filter B on MJD  59227.100
--------
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-15894Plot of color for M33C-15894

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 [0.47 mag]B [0.72 mag]R [0.46 mag]
B [0.47 mag]0.01 (18)
R [0.46 mag]0.26 (13)0.03 (8)
I [0.54 mag]0.20 (8)0.57 (6)0.38 (6)

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-15894

Plot to assess correlation between bands for M33C-15894

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)
0.39 | 0.54
R
(I|R)
3.56 | 1.12-0.52 | 0.46
I
(I|R)
1.24 | 1.850.77 | 1.033.20 | 1.98

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