Color composite thumbnail image of M33C-2976M33C-2976 (J013229.03+302819.6 )



Target Notes

Color composite thumbnail image of M33C-2976

Classification: Fe_emission

(Candidate LBV) 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
57035.14 18.74± 0.09-M33C-2976 in filter V on MJD  57035.140
19.08± 0.12-M33C-2976 in filter B on MJD  57035.140
18.55± 0.09-M33C-2976 in filter R on MJD  57035.140
----
57310.16 18.88± 0.08-M33C-2976 in filter V on MJD  57310.160
18.83± 0.07-M33C-2976 in filter B on MJD  57310.160
18.68± 0.08-M33C-2976 in filter R on MJD  57310.160
----
57638.39 18.92± 0.05-M33C-2976 in filter V on MJD  57638.390
19.01± 0.06-M33C-2976 in filter B on MJD  57638.390
18.80± 0.04-M33C-2976 in filter R on MJD  57638.390
18.78± 0.09-M33C-2976 in filter I on MJD  57638.390
57964.40 19.17± 0.06-M33C-2976 in filter V on MJD  57964.400
-------- 18.52± 0.11AM33C-2976 in filter I on MJD  57964.400
M33C-2976 in filter I on MJD  57964.400
57988.43 18.97± 0.09TM33C-2976 in filter V on MJD  57988.430
------------
58043.13 18.97± 0.08-M33C-2976 in filter V on MJD  58043.130
18.96± 0.06-M33C-2976 in filter B on MJD  58043.130
18.70± 0.06-M33C-2976 in filter R on MJD  58043.130
----
58073.22 18.94± 0.07-M33C-2976 in filter V on MJD  58073.220
18.92± 0.07-M33C-2976 in filter B on MJD  58073.220
--------
58108.09 19.21± 0.06-M33C-2976 in filter V on MJD  58108.090
19.23± 0.06-M33C-2976 in filter B on MJD  58108.090
---- 18.70± 0.12-M33C-2976 in filter I on MJD  58108.090
58316.35 18.97± 0.09-M33C-2976 in filter V on MJD  58316.350
19.23± 0.08-M33C-2976 in filter B on MJD  58316.350
--------
58341.37 19.11± 0.07-M33C-2976 in filter V on MJD  58341.370
-------- 19.25± 0.15-M33C-2976 in filter I on MJD  58341.370
58433.02 18.93± 0.08-M33C-2976 in filter V on MJD  58433.020
---- 18.69± 0.08-M33C-2976 in filter R on MJD  58433.020
18.29± 0.12-M33C-2976 in filter I on MJD  58433.020
58695.39 18.93± 0.06-M33C-2976 in filter V on MJD  58695.390
---- 18.80± 0.05-M33C-2976 in filter R on MJD  58695.390
----
58750.22 18.97± 0.06-M33C-2976 in filter V on MJD  58750.220
19.05± 0.05-M33C-2976 in filter B on MJD  58750.220
---- 18.60± 0.10-M33C-2976 in filter I on MJD  58750.220
58784.14 19.02± 0.06-M33C-2976 in filter V on MJD  58784.140
---- 18.81± 0.06-M33C-2976 in filter R on MJD  58784.140
----
58812.20 19.05± 0.07-M33C-2976 in filter V on MJD  58812.200
---- 18.82± 0.08-M33C-2976 in filter R on MJD  58812.200
----
59059.40 19.10± 0.08-M33C-2976 in filter V on MJD  59059.400
---- 18.88± 0.07-M33C-2976 in filter R on MJD  59059.400
> 18.43-M33C-2976 in filter I on MJD  59059.400
59081.30 18.99± 0.07-M33C-2976 in filter V on MJD  59081.300
18.96± 0.07-M33C-2976 in filter B on MJD  59081.300
18.88± 0.07-M33C-2976 in filter R on MJD  59081.300
----
59082.38 19.09± 0.07-M33C-2976 in filter V on MJD  59082.380
19.18± 0.05-M33C-2976 in filter B on MJD  59082.380
M33C-2976 in filter B on MJD  59082.380
18.96± 0.05-M33C-2976 in filter R on MJD  59082.380
M33C-2976 in filter R on MJD  59082.380
----
59084.25-------- 18.82± 0.05TM33C-2976 in filter R on MJD  59084.250
----
59161.14 19.00± 0.07-M33C-2976 in filter V on MJD  59161.140
---- 18.88± 0.07-M33C-2976 in filter R on MJD  59161.140
18.62± 0.11-M33C-2976 in filter I on MJD  59161.140
59171.14 19.06± 0.07-M33C-2976 in filter V on MJD  59171.140
19.00± 0.05-M33C-2976 in filter B on MJD  59171.140
---- 18.64± 0.09-M33C-2976 in filter I on MJD  59171.140
59227.12 18.98± 0.06-M33C-2976 in filter V on MJD  59227.120
18.91± 0.04-M33C-2976 in filter B on MJD  59227.120
18.79± 0.06-M33C-2976 in filter R 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-2976Plot of color for M33C-2976

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 [0.39 mag]B [0.47 mag]R [0.42 mag]
B [0.39 mag]0.19 (12)
R [0.42 mag]0.76 (13)0.08 (7)
I [0.96 mag]0.09 (8)0.00 (4)0.52 (3)

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-2976

Plot to assess correlation between bands for M33C-2976

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)
1.70 | 1.52
R
(I|R)
1.47 | 0.791.66 | 0.42
I
(I|R)
0.55 | 1.12--- | --- --- | ----

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