Color composite thumbnail image of M31-004434.65M31-004434.65 (J004434.64+412503.5)



Target Notes

Color composite thumbnail image of M31-004434.65

Classification: OB-Supergiant

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 Kaluzny et al. (1998) M31 Survey at VizieR
Query POINT-AGAPE An et al. (2004) M31 Survey at VizieR


Photometry Table

Download table (txt) Key to Flags in Table Key For Images Plot/Graph Variability
MJDV*ImageB*ImageR*ImagesI*Images
56142.33 16.70± 0.06TM31-004434.65 in filter V on MJD  56142.330
------------
56267.14-------- 16.64± 0.05TM31-004434.65 in filter R on MJD  56267.140
----
56490.38 16.69± 0.04TM31-004434.65 in filter V on MJD  56490.380
------------
56536.26 16.68± 0.05-M31-004434.65 in filter V on MJD  56536.260
---- 16.60± 0.06-M31-004434.65 in filter R on MJD  56536.260
----
56537.20 16.68± 0.05-M31-004434.65 in filter V on MJD  56537.200
16.67± 0.07-M31-004434.65 in filter B on MJD  56537.200
--------
56915.14 16.62± 0.04AM31-004434.65 in filter V on MJD  56915.140
M31-004434.65 in filter V on MJD  56915.140
16.62± 0.05AM31-004434.65 in filter B on MJD  56915.140
M31-004434.65 in filter B on MJD  56915.140
16.54± 0.04AM31-004434.65 in filter R on MJD  56915.140
M31-004434.65 in filter R on MJD  56915.140
----
57227.33 16.68± 0.04AM31-004434.65 in filter V on MJD  57227.330
M31-004434.65 in filter V on MJD  57227.330
16.68± 0.04AM31-004434.65 in filter B on MJD  57227.330
M31-004434.65 in filter B on MJD  57227.330
16.61± 0.04AM31-004434.65 in filter R on MJD  57227.330
M31-004434.65 in filter R on MJD  57227.330
----
57310.09 16.65± 0.03AM31-004434.65 in filter V on MJD  57310.090
M31-004434.65 in filter V on MJD  57310.090
-------- 16.45± 0.06AM31-004434.65 in filter I on MJD  57310.090
M31-004434.65 in filter I on MJD  57310.090
57633.28 16.67± 0.04-M31-004434.65 in filter V on MJD  57633.280
16.64± 0.04-M31-004434.65 in filter B on MJD  57633.280
16.57± 0.04-M31-004434.65 in filter R on MJD  57633.280
----
57635.35 16.65± 0.05-M31-004434.65 in filter V on MJD  57635.350
-------- 16.50± 0.06-M31-004434.65 in filter I on MJD  57635.350
57638.27 16.68± 0.05-M31-004434.65 in filter V on MJD  57638.270
-------- 16.56± 0.04-M31-004434.65 in filter I on MJD  57638.270
57928.34 16.65± 0.04AM31-004434.65 in filter V on MJD  57928.340
M31-004434.65 in filter V on MJD  57928.340
16.63± 0.05AM31-004434.65 in filter B on MJD  57928.340
M31-004434.65 in filter B on MJD  57928.340
16.57± 0.05AM31-004434.65 in filter R on MJD  57928.340
M31-004434.65 in filter R on MJD  57928.340
16.45± 0.07AM31-004434.65 in filter I on MJD  57928.340
M31-004434.65 in filter I on MJD  57928.340
57958.29 16.69± 0.04-M31-004434.65 in filter V on MJD  57958.290
16.69± 0.04-M31-004434.65 in filter B on MJD  57958.290
---- 16.55± 0.05-M31-004434.65 in filter I on MJD  57958.290
57963.25 16.68± 0.06TM31-004434.65 in filter V on MJD  57963.250
------------
58035.03 16.64± 0.04-M31-004434.65 in filter V on MJD  58035.030
---- 16.56± 0.04-M31-004434.65 in filter R on MJD  58035.030
----
58043.05 16.68± 0.04AM31-004434.65 in filter V on MJD  58043.050
M31-004434.65 in filter V on MJD  58043.050
16.66± 0.05AM31-004434.65 in filter B on MJD  58043.050
M31-004434.65 in filter B on MJD  58043.050
16.58± 0.04-M31-004434.65 in filter R on MJD  58043.050
16.60± 0.06-M31-004434.65 in filter I on MJD  58043.050
58073.09 16.66± 0.06-M31-004434.65 in filter V on MJD  58073.090
16.59± 0.07-M31-004434.65 in filter B on MJD  58073.090
--------
58098.09 16.71± 0.04-M31-004434.65 in filter V on MJD  58098.090
16.72± 0.03-M31-004434.65 in filter B on MJD  58098.090
16.62± 0.04AM31-004434.65 in filter R on MJD  58098.090
M31-004434.65 in filter R on MJD  58098.090
----
58312.29 16.76± 0.04-M31-004434.65 in filter V on MJD  58312.290
16.79± 0.04-M31-004434.65 in filter B on MJD  58312.290
16.67± 0.04-M31-004434.65 in filter R on MJD  58312.290
----
58316.26 16.69± 0.04-M31-004434.65 in filter V on MJD  58316.260
-------- 16.55± 0.04-M31-004434.65 in filter I on MJD  58316.260
58341.23 16.77± 0.05-M31-004434.65 in filter V on MJD  58341.230
16.78± 0.05-M31-004434.65 in filter B on MJD  58341.230
--------
58366.12 16.69± 0.03-M31-004434.65 in filter V on MJD  58366.120
16.71± 0.04-M31-004434.65 in filter B on MJD  58366.120
--------
58375.12 16.72± 0.04-M31-004434.65 in filter V on MJD  58375.120
---- 16.64± 0.03-M31-004434.65 in filter R on MJD  58375.120
----
58403.08 16.73± 0.04-M31-004434.65 in filter V on MJD  58403.080
-------- 16.64± 0.06-M31-004434.65 in filter I on MJD  58403.080
58433.09 16.68± 0.06-M31-004434.65 in filter V on MJD  58433.090
16.65± 0.06-M31-004434.65 in filter B on MJD  58433.090
16.59± 0.06-M31-004434.65 in filter R on MJD  58433.090
----
58671.29 16.72± 0.07-M31-004434.65 in filter V on MJD  58671.290
16.78± 0.06-M31-004434.65 in filter B on MJD  58671.290
--------
58673.29 16.76± 0.07-M31-004434.65 in filter V on MJD  58673.290
---- 16.65± 0.07-M31-004434.65 in filter R on MJD  58673.290
16.58± 0.08-M31-004434.65 in filter I on MJD  58673.290
58696.30 16.67± 0.07-M31-004434.65 in filter V on MJD  58696.300
16.67± 0.07-M31-004434.65 in filter B on MJD  58696.300
16.58± 0.07-M31-004434.65 in filter R on MJD  58696.300
----
58750.07 16.68± 0.06-M31-004434.65 in filter V on MJD  58750.070
16.70± 0.06-M31-004434.65 in filter B on MJD  58750.070
--------
58779.05 16.70± 0.06-M31-004434.65 in filter V on MJD  58779.050
---- 16.64± 0.04-M31-004434.65 in filter R on MJD  58779.050
----
58812.07 16.67± 0.07-M31-004434.65 in filter V on MJD  58812.070
---- 16.59± 0.07-M31-004434.65 in filter R on MJD  58812.070
----
59000.39 16.65± 0.07-M31-004434.65 in filter V on MJD  59000.390
---- 16.59± 0.10-M31-004434.65 in filter R on MJD  59000.390
----
59055.31 16.67± 0.08-M31-004434.65 in filter V on MJD  59055.310
---- 16.58± 0.09-M31-004434.65 in filter R on MJD  59055.310
----
59077.20 16.71± 0.07-M31-004434.65 in filter V on MJD  59077.200
16.70± 0.07-M31-004434.65 in filter B on MJD  59077.200
16.62± 0.07-M31-004434.65 in filter R on MJD  59077.200
16.57± 0.10-M31-004434.65 in filter I on MJD  59077.200
59131.09 16.72± 0.07-M31-004434.65 in filter V on MJD  59131.090
---- 16.62± 0.07-M31-004434.65 in filter R on MJD  59131.090
----
59166.12 16.73± 0.07-M31-004434.65 in filter V on MJD  59166.120
-------- 16.57± 0.09-M31-004434.65 in filter I on MJD  59166.120
59194.11 16.68± 0.07-M31-004434.65 in filter V on MJD  59194.110
16.66± 0.07-M31-004434.65 in filter B on MJD  59194.110
--------
59376.35 16.62± 0.07-M31-004434.65 in filter V on MJD  59376.350
16.66± 0.07-M31-004434.65 in filter B on MJD  59376.350
--------
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 M31-004434.65Plot of color for M31-004434.65

Key for Plot Variability Photometry Table Target Notes


Variability

Plot/Graph Photometry Table Target Notes

It is very likely that 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 [0.20 mag]B [0.15 mag]R [0.12 mag]
B [0.20 mag]0.76 (19)
R [0.12 mag]0.88 (19)0.95 (10)
I [0.19 mag]0.60 (11)0.45 (4)0.27 (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 M31-004434.65

Plot to assess correlation between bands for M31-004434.65

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)
0.80 | 1.43
R
(I|R)
0.60 | 0.991.00 | 0.42
I
(I|R)
0.59 | 0.87--- | --- --- | ----

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