Color composite thumbnail image of M33-013341.28M33-013341.28 (J013341.28+302237.2)



Target Notes

Color composite thumbnail image of M33-013341.28

Classification: OB-Supergiant

In a crowd but >3 mag brighter than all around it.

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
56140.40 16.25± 0.06bM33-013341.28 in filter V on MJD  56140.400
---- 16.19± 0.06bM33-013341.28 in filter R on MJD  56140.400
----
56599.22 16.14± 0.06bM33-013341.28 in filter V on MJD  56599.220
16.04± 0.04bM33-013341.28 in filter B on MJD  56599.220
16.08± 0.05bM33-013341.28 in filter R on MJD  56599.220
----
56982.22 16.19± 0.06bM33-013341.28 in filter V on MJD  56982.220
16.09± 0.06bM33-013341.28 in filter B on MJD  56982.220
16.14± 0.07bM33-013341.28 in filter R on MJD  56982.220
----
57035.14 16.22± 0.04bM33-013341.28 in filter V on MJD  57035.140
16.09± 0.03bM33-013341.28 in filter B on MJD  57035.140
16.11± 0.04bM33-013341.28 in filter R on MJD  57035.140
----
57310.16 16.17± 0.05bM33-013341.28 in filter V on MJD  57310.160
16.07± 0.04bM33-013341.28 in filter B on MJD  57310.160
16.07± 0.05bM33-013341.28 in filter R on MJD  57310.160
----
57328.19 16.23± 0.05bM33-013341.28 in filter V on MJD  57328.190
16.07± 0.07bM33-013341.28 in filter B on MJD  57328.190
16.11± 0.07bM33-013341.28 in filter R on MJD  57328.190
----
57634.41 16.25± 0.07bM33-013341.28 in filter V on MJD  57634.410
16.13± 0.08bM33-013341.28 in filter B on MJD  57634.410
16.19± 0.07bM33-013341.28 in filter R on MJD  57634.410
----
57638.43 16.23± 0.06bM33-013341.28 in filter V on MJD  57638.430
-------- 16.12± 0.10bM33-013341.28 in filter I on MJD  57638.430
57988.43 16.20± 0.06TbM33-013341.28 in filter V on MJD  57988.430
------------
58043.16 16.23± 0.05bM33-013341.28 in filter V on MJD  58043.160
16.14± 0.06bM33-013341.28 in filter B on MJD  58043.160
16.11± 0.05bM33-013341.28 in filter R on MJD  58043.160
16.09± 0.09bM33-013341.28 in filter I on MJD  58043.160
58108.17 16.23± 0.05bM33-013341.28 in filter V on MJD  58108.170
16.13± 0.06bM33-013341.28 in filter B on MJD  58108.170
---- 16.09± 0.09bM33-013341.28 in filter I on MJD  58108.170
58339.40 16.26± 0.06bM33-013341.28 in filter V on MJD  58339.400
16.14± 0.06bM33-013341.28 in filter B on MJD  58339.400
16.16± 0.06bM33-013341.28 in filter R on MJD  58339.400
----
58375.16 16.27± 0.05bM33-013341.28 in filter V on MJD  58375.160
-------- 16.04± 0.09bM33-013341.28 in filter I on MJD  58375.160
58696.41 15.96± 0.06XM33-013341.28 in filter V on MJD  58696.410
16.27± 0.08XM33-013341.28 in filter B on MJD  58696.410
16.51± 0.14XM33-013341.28 in filter R on MJD  58696.410
----
58757.17 16.33± 0.06BM33-013341.28 in filter V on MJD  58757.170
---- 16.25± 0.05XM33-013341.28 in filter R on MJD  58757.170
----
58784.15 16.30± 0.05BM33-013341.28 in filter V on MJD  58784.150
-------- 16.13± 0.08bM33-013341.28 in filter I on MJD  58784.150
59081.36 16.24± 0.05bM33-013341.28 in filter V on MJD  59081.360
16.12± 0.05bM33-013341.28 in filter B on MJD  59081.360
16.12± 0.05bM33-013341.28 in filter R on MJD  59081.360
16.05± 0.07bM33-013341.28 in filter I on MJD  59081.360
59084.38-------- 16.18± 0.07TbM33-013341.28 in filter R on MJD  59084.380
----
59171.17 16.21± 0.04bM33-013341.28 in filter V on MJD  59171.170
16.20± 0.10bM33-013341.28 in filter B on MJD  59171.170
16.13± 0.05bM33-013341.28 in filter R on MJD  59171.170
16.08± 0.08bM33-013341.28 in filter I on MJD  59171.170
59227.15 16.29± 0.05bM33-013341.28 in filter V on MJD  59227.150
16.11± 0.06bM33-013341.28 in filter B on MJD  59227.150
16.19± 0.05bM33-013341.28 in filter R on MJD  59227.150
16.11± 0.07bM33-013341.28 in filter I on MJD  59227.150
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 M33-013341.28Plot of color for M33-013341.28

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 [0.16 mag]B [0.19 mag]R [0.13 mag]
B [0.16 mag]0.25 (12)
R [0.13 mag]0.65 (12)0.22 (11)
I [0.09 mag]0.12 (8)0.03 (5)0.36 (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 M33-013341.28

Plot to assess correlation between bands for M33-013341.28

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)
0.31 | 1.02
R
(I|R)
0.47 | 0.910.34 | 0.74
I
(I|R)
0.09 | 1.76-0.01 | 1.27--- | ----

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