Color composite thumbnail image of M33C-5916M33C-5916 (J013354.85+303222.8)



Target Notes

Color composite thumbnail image of M33C-5916

Classification: Of/late-WN

(Candidate LBV) LGGS star J013354.73+303223.5 of comparable brightness 1.7 arcseconds W. Several other LGGS stars >2 magnitudes fainter within 3 arcseconds. Points marked with X are bad PSF fits caused by bad focus/seeing.

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
56140.38 17.85± 0.07AbM33C-5916 in filter V on MJD  56140.380
M33C-5916 in filter V on MJD  56140.380
---- 17.97± 0.17AXM33C-5916 in filter R on MJD  56140.380
M33C-5916 in filter R on MJD  56140.380
----
56593.16 17.59± 0.05bM33C-5916 in filter V on MJD  56593.160
17.63± 0.05bM33C-5916 in filter B on MJD  56593.160
--------
56599.19 17.53± 0.06AbM33C-5916 in filter V on MJD  56599.190
M33C-5916 in filter V on MJD  56599.190
17.77± 0.07AbM33C-5916 in filter B on MJD  56599.190
M33C-5916 in filter B on MJD  56599.190
17.29± 0.06AbM33C-5916 in filter R on MJD  56599.190
M33C-5916 in filter R on MJD  56599.190
----
56976.18 17.60± 0.05AbM33C-5916 in filter V on MJD  56976.180
M33C-5916 in filter V on MJD  56976.180
17.69± 0.06AbM33C-5916 in filter B on MJD  56976.180
M33C-5916 in filter B on MJD  56976.180
17.36± 0.06AbM33C-5916 in filter R on MJD  56976.180
M33C-5916 in filter R on MJD  56976.180
----
56982.22 17.69± 0.06bM33C-5916 in filter V on MJD  56982.220
17.76± 0.07bM33C-5916 in filter B on MJD  56982.220
17.48± 0.07bM33C-5916 in filter R on MJD  56982.220
----
57328.19 17.61± 0.06bM33C-5916 in filter V on MJD  57328.190
17.46± 0.07bM33C-5916 in filter B on MJD  57328.190
17.35± 0.07bM33C-5916 in filter R on MJD  57328.190
----
57406.10 18.65± 0.19XM33C-5916 in filter V on MJD  57406.100
17.84± 0.08bM33C-5916 in filter B on MJD  57406.100
17.60± 0.09bM33C-5916 in filter R on MJD  57406.100
17.44± 0.09bM33C-5916 in filter I on MJD  57406.100
57634.41 17.52± 0.07bM33C-5916 in filter V on MJD  57634.410
17.58± 0.08bM33C-5916 in filter B on MJD  57634.410
17.43± 0.08bM33C-5916 in filter R on MJD  57634.410
----
57638.43 17.64± 0.07bM33C-5916 in filter V on MJD  57638.430
-------- 17.25± 0.10bM33C-5916 in filter I on MJD  57638.430
57964.33 17.72± 0.06bM33C-5916 in filter V on MJD  57964.330
17.66± 0.07bM33C-5916 in filter B on MJD  57964.330
17.49± 0.06bM33C-5916 in filter R on MJD  57964.330
17.11± 0.07bM33C-5916 in filter I on MJD  57964.330
58045.18 17.62± 0.06bM33C-5916 in filter V on MJD  58045.180
17.82± 0.07bM33C-5916 in filter B on MJD  58045.180
17.49± 0.06bM33C-5916 in filter R on MJD  58045.180
----
58073.20 17.91± 0.07bM33C-5916 in filter V on MJD  58073.200
17.83± 0.07bM33C-5916 in filter B on MJD  58073.200
--------
58103.18 17.79± 0.09TbM33C-5916 in filter V on MJD  58103.180
------------
58108.11 17.79± 0.07bM33C-5916 in filter V on MJD  58108.110
17.65± 0.09bM33C-5916 in filter B on MJD  58108.110
---- 18.12± 0.21XM33C-5916 in filter I on MJD  58108.110
58312.39 17.80± 0.06bM33C-5916 in filter V on MJD  58312.390
18.21± 0.20bM33C-5916 in filter B on MJD  58312.390
--------
58317.37 17.76± 0.05bM33C-5916 in filter V on MJD  58317.370
18.06± 0.07bM33C-5916 in filter B on MJD  58317.370
17.52± 0.05bM33C-5916 in filter R on MJD  58317.370
----
58341.34 17.59± 0.07bM33C-5916 in filter V on MJD  58341.340
-------- 17.27± 0.09bM33C-5916 in filter I on MJD  58341.340
58342.40 17.90± 0.07bM33C-5916 in filter V on MJD  58342.400
18.17± 0.19bM33C-5916 in filter B on MJD  58342.400
17.40± 0.06bM33C-5916 in filter R on MJD  58342.400
----
58375.14 18.35± 0.08XM33C-5916 in filter V on MJD  58375.140
---- 17.80± 0.07bM33C-5916 in filter R on MJD  58375.140
----
58420.10 18.68± 0.09XM33C-5916 in filter V on MJD  58420.100
17.29± 0.07XM33C-5916 in filter B on MJD  58420.100
---- 17.64± 0.11bM33C-5916 in filter I on MJD  58420.100
58433.02 17.61± 0.05bM33C-5916 in filter V on MJD  58433.020
---- 17.51± 0.06bM33C-5916 in filter R on MJD  58433.020
17.43± 0.12bM33C-5916 in filter I on MJD  58433.020
58672.39 17.76± 0.08bM33C-5916 in filter V on MJD  58672.390
---- 17.41± 0.07bM33C-5916 in filter R on MJD  58672.390
> 18.05bM33C-5916 in filter I on MJD  58672.390
58695.36 17.66± 0.06bM33C-5916 in filter V on MJD  58695.360
17.99± 0.07bM33C-5916 in filter B on MJD  58695.360
17.56± 0.05bM33C-5916 in filter R on MJD  58695.360
----
58696.41 17.94± 0.07bM33C-5916 in filter V on MJD  58696.410
18.59± 0.10bM33C-5916 in filter B on MJD  58696.410
M33C-5916 in filter B on MJD  58696.410
18.14± 0.14bM33C-5916 in filter R on MJD  58696.410
M33C-5916 in filter R on MJD  58696.410
----
58757.17 17.64± 0.06bM33C-5916 in filter V on MJD  58757.170
---- 17.47± 0.06bM33C-5916 in filter R on MJD  58757.170
----
58784.14 17.65± 0.06AbM33C-5916 in filter V on MJD  58784.140
M33C-5916 in filter V on MJD  58784.140
17.59± 0.06bM33C-5916 in filter B on MJD  58784.140
---- 17.23± 0.08bM33C-5916 in filter I on MJD  58784.140
58902.07 17.60± 0.05bM33C-5916 in filter V on MJD  58902.070
---- 17.41± 0.05bM33C-5916 in filter R on MJD  58902.070
----
59059.39 17.75± 0.06AbM33C-5916 in filter V on MJD  59059.390
M33C-5916 in filter V on MJD  59059.390
17.71± 0.07bM33C-5916 in filter B on MJD  59059.390
17.55± 0.06bM33C-5916 in filter R on MJD  59059.390
----
59081.29 17.86± 0.07AbM33C-5916 in filter V on MJD  59081.290
M33C-5916 in filter V on MJD  59081.290
17.96± 0.06bM33C-5916 in filter B on MJD  59081.290
17.64± 0.06AbM33C-5916 in filter R on MJD  59081.290
M33C-5916 in filter R on MJD  59081.290
----
59084.38-------- 17.58± 0.07TbM33C-5916 in filter R on MJD  59084.380
----
59161.07 17.69± 0.06bM33C-5916 in filter V on MJD  59161.070
17.68± 0.07bM33C-5916 in filter B on MJD  59161.070
17.53± 0.06bM33C-5916 in filter R on MJD  59161.070
----
59171.09 17.68± 0.06bM33C-5916 in filter V on MJD  59171.090
-------- 17.13± 0.07bM33C-5916 in filter I on MJD  59171.090
59227.12 17.79± 0.05AbM33C-5916 in filter V on MJD  59227.120
M33C-5916 in filter V on MJD  59227.120
M33C-5916 in filter V on MJD  59227.120
17.74± 0.06AbM33C-5916 in filter B on MJD  59227.120
M33C-5916 in filter B on MJD  59227.120
M33C-5916 in filter B on MJD  59227.120
17.58± 0.06AbM33C-5916 in filter R on MJD  59227.120
M33C-5916 in filter R on MJD  59227.120
17.33± 0.08bM33C-5916 in filter I on MJD  59227.120
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-5916Plot of color for M33C-5916

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 [1.13 mag]B [0.43 mag]R [0.85 mag]
B [1.13 mag]0.44 (20)
R [0.85 mag]0.43 (19)0.55 (16)
I [0.53 mag]0.05 (7)0.67 (4)0.38 (4)

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-5916

Plot to assess correlation between bands for M33C-5916

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)
3.67 | 1.28
R
(I|R)
2.43 | 1.083.41 | 0.45
I
(I|R)
-0.28 | 0.92--- | --- --- | ----

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