Color composite thumbnail image of M33C-7256M33C-7256 (J013333.22+303343.4)



Target Notes

Color composite thumbnail image of M33C-7256

Classification: B[e]sg

Nine LGGS stars of comparable brightness or slightly fainter within 4 arcseconds. One brighter LGGS star 3.2 arcseconds to SE. May be tough to resolve at times. Also appears to have some significant variability.

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 18.91± 0.08TbM33C-7256 in filter V on MJD  56140.400
------------
56593.16 18.70± 0.06bM33C-7256 in filter V on MJD  56593.160
19.23± 0.11XM33C-7256 in filter B on MJD  56593.160
--------
56599.21 18.72± 0.08AbM33C-7256 in filter V on MJD  56599.210
M33C-7256 in filter V on MJD  56599.210
18.59± 0.08AbM33C-7256 in filter B on MJD  56599.210
M33C-7256 in filter B on MJD  56599.210
17.61± 0.06AbM33C-7256 in filter R on MJD  56599.210
M33C-7256 in filter R on MJD  56599.210
----
56976.19 18.98± 0.09bM33C-7256 in filter V on MJD  56976.190
19.26± 0.14bM33C-7256 in filter B on MJD  56976.190
--------
56982.22 19.13± 0.09bM33C-7256 in filter V on MJD  56982.220
19.17± 0.11bM33C-7256 in filter B on MJD  56982.220
17.93± 0.07bM33C-7256 in filter R on MJD  56982.220
----
57035.14>17.860-M33C-7256 in filter V on MJD  57035.140
> 17.97-M33C-7256 in filter B on MJD  57035.140
--------
57310.16 18.38± 0.08XM33C-7256 in filter V on MJD  57310.160
19.25± 0.10bM33C-7256 in filter B on MJD  57310.160
--------
57328.16 19.00± 0.10bM33C-7256 in filter V on MJD  57328.160
19.13± 0.07bM33C-7256 in filter B on MJD  57328.160
17.87± 0.05bM33C-7256 in filter R on MJD  57328.160
----
57406.10>17.890-M33C-7256 in filter V on MJD  57406.100
> 18.09-M33C-7256 in filter B on MJD  57406.100
17.80± 0.07TbM33C-7256 in filter R on MJD  57406.100
18.15± 0.15bM33C-7256 in filter I on MJD  57406.100
57634.40 19.10± 0.11bM33C-7256 in filter V on MJD  57634.400
19.23± 0.11AbM33C-7256 in filter B on MJD  57634.400
M33C-7256 in filter B on MJD  57634.400
17.88± 0.07AbM33C-7256 in filter R on MJD  57634.400
M33C-7256 in filter R on MJD  57634.400
----
57638.40 18.93± 0.07AbM33C-7256 in filter V on MJD  57638.400
M33C-7256 in filter V on MJD  57638.400
19.21± 0.08bM33C-7256 in filter B on MJD  57638.400
18.02± 0.05bM33C-7256 in filter R on MJD  57638.400
17.74± 0.08XM33C-7256 in filter I on MJD  57638.400
57964.40>19.320bM33C-7256 in filter V on MJD  57964.400
-------- 17.58± 0.08TXM33C-7256 in filter I on MJD  57964.400
M33C-7256 in filter I on MJD  57964.400
57988.43 18.88± 0.10TbM33C-7256 in filter V on MJD  57988.430
------------
58043.13 18.26± 0.08bM33C-7256 in filter V on MJD  58043.130
18.97± 0.08bM33C-7256 in filter B on MJD  58043.130
17.64± 0.04bM33C-7256 in filter R on MJD  58043.130
----
58073.22 18.23± 0.08bM33C-7256 in filter V on MJD  58073.220
18.92± 0.18bM33C-7256 in filter B on MJD  58073.220
--------
58108.13 18.64± 0.07AbM33C-7256 in filter V on MJD  58108.130
M33C-7256 in filter V on MJD  58108.130
19.10± 0.08AbM33C-7256 in filter B on MJD  58108.130
M33C-7256 in filter B on MJD  58108.130
---- 17.94± 0.10AbM33C-7256 in filter I on MJD  58108.130
M33C-7256 in filter I on MJD  58108.130
58316.35 18.60± 0.11bM33C-7256 in filter V on MJD  58316.350
19.46± 0.11bM33C-7256 in filter B on MJD  58316.350
--------
58317.37 19.09± 0.11bM33C-7256 in filter V on MJD  58317.370
19.02± 0.08bM33C-7256 in filter B on MJD  58317.370
M33C-7256 in filter B on MJD  58317.370
17.89± 0.06bM33C-7256 in filter R on MJD  58317.370
----
58341.34 18.90± 0.13bM33C-7256 in filter V on MJD  58341.340
-------- 17.79± 0.10bM33C-7256 in filter I on MJD  58341.340
58373.15 18.90± 0.10bM33C-7256 in filter V on MJD  58373.150
19.39± 0.14bM33C-7256 in filter B on MJD  58373.150
--------
58375.14 18.94± 0.10bM33C-7256 in filter V on MJD  58375.140
---- 18.14± 0.08bM33C-7256 in filter R on MJD  58375.140
----
58420.10 18.05± 0.06bXM33C-7256 in filter V on MJD  58420.100
18.70± 0.10bXM33C-7256 in filter B on MJD  58420.100
----> 18.36bM33C-7256 in filter I on MJD  58420.100
58433.02 19.03± 0.18bM33C-7256 in filter V on MJD  58433.020
---- 17.84± 0.06bM33C-7256 in filter R on MJD  58433.020
19.14± 0.27bM33C-7256 in filter I on MJD  58433.020
58673.38 19.08± 0.07bM33C-7256 in filter V on MJD  58673.380
19.10± 0.09bM33C-7256 in filter B on MJD  58673.380
--------
58695.39 19.16± 0.07bM33C-7256 in filter V on MJD  58695.390
---- 18.00± 0.06bM33C-7256 in filter R on MJD  58695.390
----
58696.41 19.14± 0.07bM33C-7256 in filter V on MJD  58696.410
19.43± 0.17bM33C-7256 in filter B on MJD  58696.410
17.91± 0.09bM33C-7256 in filter R on MJD  58696.410
M33C-7256 in filter R on MJD  58696.410
----
58750.20 18.81± 0.08AbM33C-7256 in filter V on MJD  58750.200
M33C-7256 in filter V on MJD  58750.200
19.12± 0.08bM33C-7256 in filter B on MJD  58750.200
17.90± 0.06bM33C-7256 in filter R on MJD  58750.200
18.02± 0.10bM33C-7256 in filter I on MJD  58750.200
58757.17 18.75± 0.11bM33C-7256 in filter V on MJD  58757.170
---- 17.88± 0.06bM33C-7256 in filter R on MJD  58757.170
----
58779.18 18.43± 0.11bM33C-7256 in filter V on MJD  58779.180
18.04± 0.06bM33C-7256 in filter B on MJD  58779.180
--------
58784.14 19.01± 0.09AbM33C-7256 in filter V on MJD  58784.140
M33C-7256 in filter V on MJD  58784.140
---- 17.95± 0.06bM33C-7256 in filter R on MJD  58784.140
17.90± 0.11bM33C-7256 in filter I on MJD  58784.140
58812.20 18.38± 0.09bM33C-7256 in filter V on MJD  58812.200
---- 17.78± 0.08bM33C-7256 in filter R on MJD  58812.200
----
59059.40 18.92± 0.10bM33C-7256 in filter V on MJD  59059.400
---- 18.00± 0.06bM33C-7256 in filter R on MJD  59059.400
> 18.43-M33C-7256 in filter I on MJD  59059.400
59081.30 18.74± 0.09bM33C-7256 in filter V on MJD  59081.300
19.16± 0.11bM33C-7256 in filter B on MJD  59081.300
18.02± 0.07bM33C-7256 in filter R on MJD  59081.300
----
59082.32 18.79± 0.07bM33C-7256 in filter V on MJD  59082.320
19.13± 0.10bM33C-7256 in filter B on MJD  59082.320
M33C-7256 in filter B on MJD  59082.320
17.91± 0.05bM33C-7256 in filter R on MJD  59082.320
M33C-7256 in filter R on MJD  59082.320
----
59084.25-------- 17.90± 0.05TbM33C-7256 in filter R on MJD  59084.250
----
59161.10 18.82± 0.10AbM33C-7256 in filter V on MJD  59161.100
M33C-7256 in filter V on MJD  59161.100
M33C-7256 in filter V on MJD  59161.100
18.84± 0.12AbM33C-7256 in filter B on MJD  59161.100
M33C-7256 in filter B on MJD  59161.100
17.79± 0.06AbM33C-7256 in filter R on MJD  59161.100
M33C-7256 in filter R on MJD  59161.100
M33C-7256 in filter R on MJD  59161.100
17.28± 0.10XM33C-7256 in filter I on MJD  59161.100
59171.14 18.96± 0.09AbM33C-7256 in filter V on MJD  59171.140
M33C-7256 in filter V on MJD  59171.140
18.90± 0.13AbM33C-7256 in filter B on MJD  59171.140
M33C-7256 in filter B on MJD  59171.140
17.85± 0.06bM33C-7256 in filter R on MJD  59171.140
17.64± 0.10AbM33C-7256 in filter I on MJD  59171.140
M33C-7256 in filter I on MJD  59171.140
59227.13 18.96± 0.09AbM33C-7256 in filter V on MJD  59227.130
M33C-7256 in filter V on MJD  59227.130
M33C-7256 in filter V on MJD  59227.130
19.04± 0.09AbM33C-7256 in filter B on MJD  59227.130
M33C-7256 in filter B on MJD  59227.130
M33C-7256 in filter B on MJD  59227.130
17.93± 0.06AbM33C-7256 in filter R on MJD  59227.130
M33C-7256 in filter R on MJD  59227.130
17.65± 0.14bM33C-7256 in filter I on MJD  59227.130
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-7256Plot of color for M33C-7256

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 [1.42 mag]B [0.94 mag]R [0.53 mag]
B [1.42 mag]0.20 (21)
R [0.53 mag]0.29 (21)0.53 (14)
I [1.50 mag]0.07 (7)0.71 (4)0.19 (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-7256

Plot to assess correlation between bands for M33C-7256

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)
4.47 | 1.04
R
(I|R)
3.50 | 1.392.42 | 0.07
I
(I|R)
-0.46 | 0.76--- | --- -0.98 | 0.40

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