Color composite thumbnail image of M31-004427.76M31-004427.76 (J004427.76+412209.8)


Target Notes

Color composite thumbnail image of M31-004427.76

Classification: YSG

No blend concerns.

Find In Simbad Query LGGS Massey (2016) at VizieR Query CAT WISE (Eisenhardt et al., 2020) at VizieR Query Gaia DR3 (2022) 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 17.16± 0.06TM31-004427.76 in filter V on MJD 56142.330
------------
56267.14-------- 16.52± 0.05TM31-004427.76 in filter R on MJD 56267.140
----
56490.38 17.21± 0.04TM31-004427.76 in filter V on MJD 56490.380
------------
56536.26 17.20± 0.05-M31-004427.76 in filter V on MJD 56536.260
---- 16.56± 0.06-M31-004427.76 in filter R on MJD 56536.260
----
56537.20 17.18± 0.05-M31-004427.76 in filter V on MJD 56537.200
 18.23± 0.07-M31-004427.76 in filter B on MJD 56537.200
--------
56915.14 17.14± 0.03AM31-004427.76 in filter V on MJD 56915.140
M31-004427.76 in filter V on MJD 56915.140
 18.10± 0.06AM31-004427.76 in filter B on MJD 56915.140
M31-004427.76 in filter B on MJD 56915.140
 16.48± 0.04AM31-004427.76 in filter R on MJD 56915.140
M31-004427.76 in filter R on MJD 56915.140
----
57227.33 17.18± 0.04AM31-004427.76 in filter V on MJD 57227.330
M31-004427.76 in filter V on MJD 57227.330
 18.15± 0.05AM31-004427.76 in filter B on MJD 57227.330
M31-004427.76 in filter B on MJD 57227.330
 16.52± 0.04AM31-004427.76 in filter R on MJD 57227.330
M31-004427.76 in filter R on MJD 57227.330
----
57310.09 17.21± 0.04AM31-004427.76 in filter V on MJD 57310.090
M31-004427.76 in filter V on MJD 57310.090
-------- 15.92± 0.06AM31-004427.76 in filter I on MJD 57310.090
M31-004427.76 in filter I on MJD 57310.090
57633.30 17.19± 0.05AM31-004427.76 in filter V on MJD 57633.300
M31-004427.76 in filter V on MJD 57633.300
 18.19± 0.07AM31-004427.76 in filter B on MJD 57633.300
M31-004427.76 in filter B on MJD 57633.300
 16.52± 0.05AM31-004427.76 in filter R on MJD 57633.300
M31-004427.76 in filter R on MJD 57633.300
----
57635.35 17.16± 0.05-M31-004427.76 in filter V on MJD 57635.350
-------- 15.83± 0.06-M31-004427.76 in filter I on MJD 57635.350
57638.27 17.25± 0.05-M31-004427.76 in filter V on MJD 57638.270
-------- 15.93± 0.04-M31-004427.76 in filter I on MJD 57638.270
57928.34 17.17± 0.04AM31-004427.76 in filter V on MJD 57928.340
M31-004427.76 in filter V on MJD 57928.340
 18.15± 0.06AM31-004427.76 in filter B on MJD 57928.340
M31-004427.76 in filter B on MJD 57928.340
 16.51± 0.05AM31-004427.76 in filter R on MJD 57928.340
M31-004427.76 in filter R on MJD 57928.340
 15.89± 0.07AM31-004427.76 in filter I on MJD 57928.340
M31-004427.76 in filter I on MJD 57928.340
57958.27 17.22± 0.05AM31-004427.76 in filter V on MJD 57958.270
M31-004427.76 in filter V on MJD 57958.270
 18.20± 0.07AM31-004427.76 in filter B on MJD 57958.270
M31-004427.76 in filter B on MJD 57958.270
---- 15.91± 0.05AM31-004427.76 in filter I on MJD 57958.270
M31-004427.76 in filter I on MJD 57958.270
57963.26 17.18± 0.06-M31-004427.76 in filter V on MJD 57963.260
 18.15± 0.07-M31-004427.76 in filter B on MJD 57963.260
--------
57988.22 17.12± 0.07-M31-004427.76 in filter V on MJD 57988.220
 18.17± 0.08-M31-004427.76 in filter B on MJD 57988.220
---- 15.87± 0.06-M31-004427.76 in filter I on MJD 57988.220
58035.03 17.21± 0.04-M31-004427.76 in filter V on MJD 58035.030
---- 16.49± 0.04-M31-004427.76 in filter R on MJD 58035.030
----
58043.05 17.20± 0.04AM31-004427.76 in filter V on MJD 58043.050
M31-004427.76 in filter V on MJD 58043.050
 18.27± 0.06AM31-004427.76 in filter B on MJD 58043.050
M31-004427.76 in filter B on MJD 58043.050
 16.50± 0.04-M31-004427.76 in filter R on MJD 58043.050
 15.88± 0.05-M31-004427.76 in filter I on MJD 58043.050
58045.05 17.19± 0.05-M31-004427.76 in filter V on MJD 58045.050
-------- 15.83± 0.06-M31-004427.76 in filter I on MJD 58045.050
58067.10 17.18± 0.05-M31-004427.76 in filter V on MJD 58067.100
-------- 15.85± 0.06-M31-004427.76 in filter I on MJD 58067.100
58073.09 17.20± 0.06-M31-004427.76 in filter V on MJD 58073.090
 18.17± 0.08-M31-004427.76 in filter B on MJD 58073.090
--------
58077.08 17.16± 0.07-M31-004427.76 in filter V on MJD 58077.080
-------- 15.82± 0.07-M31-004427.76 in filter I on MJD 58077.080
58098.09 17.27± 0.05AM31-004427.76 in filter V on MJD 58098.090
M31-004427.76 in filter V on MJD 58098.090
 18.31± 0.06AM31-004427.76 in filter B on MJD 58098.090
M31-004427.76 in filter B on MJD 58098.090
 16.67± 0.03AM31-004427.76 in filter R on MJD 58098.090
M31-004427.76 in filter R on MJD 58098.090
----
58103.08 17.21± 0.05-M31-004427.76 in filter V on MJD 58103.080
-------- 15.88± 0.07-M31-004427.76 in filter I on MJD 58103.080
58312.26 17.20± 0.06-M31-004427.76 in filter V on MJD 58312.260
 18.18± 0.07-M31-004427.76 in filter B on MJD 58312.260
 16.52± 0.06-M31-004427.76 in filter R on MJD 58312.260
----
58316.24 17.22± 0.06-M31-004427.76 in filter V on MJD 58316.240
-------- 15.89± 0.06-M31-004427.76 in filter I on MJD 58316.240
58339.26 17.14± 0.07-M31-004427.76 in filter V on MJD 58339.260
-------- 15.82± 0.07-M31-004427.76 in filter I on MJD 58339.260
58342.26 17.18± 0.04-M31-004427.76 in filter V on MJD 58342.260
 18.17± 0.07-M31-004427.76 in filter B on MJD 58342.260
--------
58366.11 17.18± 0.04-M31-004427.76 in filter V on MJD 58366.110
 18.14± 0.07-M31-004427.76 in filter B on MJD 58366.110
--------
58375.09 17.15± 0.05-M31-004427.76 in filter V on MJD 58375.090
---- 16.48± 0.04-M31-004427.76 in filter R on MJD 58375.090
----
58403.06 17.16± 0.04-M31-004427.76 in filter V on MJD 58403.060
-------- 15.83± 0.05-M31-004427.76 in filter I on MJD 58403.060
58420.01 17.14± 0.06-M31-004427.76 in filter V on MJD 58420.010
 18.07± 0.08-M31-004427.76 in filter B on MJD 58420.010
--------
58433.09 17.18± 0.06-M31-004427.76 in filter V on MJD 58433.090
 18.19± 0.06-M31-004427.76 in filter B on MJD 58433.090
 16.51± 0.06-M31-004427.76 in filter R on MJD 58433.090
----
58436.04 17.21± 0.04-M31-004427.76 in filter V on MJD 58436.040
 18.16± 0.07-M31-004427.76 in filter B on MJD 58436.040
 16.51± 0.04-M31-004427.76 in filter R on MJD 58436.040
----
58671.29 17.16± 0.07-M31-004427.76 in filter V on MJD 58671.290
 18.15± 0.07-M31-004427.76 in filter B on MJD 58671.290
--------
58673.29 17.18± 0.08-M31-004427.76 in filter V on MJD 58673.290
---- 16.53± 0.07-M31-004427.76 in filter R on MJD 58673.290
 15.84± 0.08-M31-004427.76 in filter I on MJD 58673.290
58696.30 17.17± 0.07-M31-004427.76 in filter V on MJD 58696.300
 18.19± 0.07-M31-004427.76 in filter B on MJD 58696.300
 16.49± 0.08-M31-004427.76 in filter R on MJD 58696.300
----
58750.07 17.21± 0.07-M31-004427.76 in filter V on MJD 58750.070
 18.17± 0.07-M31-004427.76 in filter B on MJD 58750.070
--------
58779.05 17.21± 0.06-M31-004427.76 in filter V on MJD 58779.050
---- 16.53± 0.03-M31-004427.76 in filter R on MJD 58779.050
----
58812.07 17.19± 0.08-M31-004427.76 in filter V on MJD 58812.070
---- 16.52± 0.08-M31-004427.76 in filter R on MJD 58812.070
----
59000.39 17.20± 0.07-M31-004427.76 in filter V on MJD 59000.390
---- 16.71± 0.10XM31-004427.76 in filter R on MJD 59000.390
----
59055.31 17.18± 0.07-M31-004427.76 in filter V on MJD 59055.310
---- 16.53± 0.08-M31-004427.76 in filter R on MJD 59055.310
----
59077.20 17.13± 0.07-M31-004427.76 in filter V on MJD 59077.200
 18.21± 0.07-M31-004427.76 in filter B on MJD 59077.200
 16.48± 0.07-M31-004427.76 in filter R on MJD 59077.200
 15.82± 0.10-M31-004427.76 in filter I on MJD 59077.200
59131.09 17.16± 0.07-M31-004427.76 in filter V on MJD 59131.090
---- 16.51± 0.07-M31-004427.76 in filter R on MJD 59131.090
----
59166.12 17.18± 0.07-M31-004427.76 in filter V on MJD 59166.120
-------- 15.92± 0.09-M31-004427.76 in filter I on MJD 59166.120
59194.11 17.18± 0.07-M31-004427.76 in filter V on MJD 59194.110
 18.17± 0.07-M31-004427.76 in filter B on MJD 59194.110
--------
59376.35 17.11± 0.07-M31-004427.76 in filter V on MJD 59376.350
 18.18± 0.07-M31-004427.76 in filter B on MJD 59376.350
--------
59409.37 17.09± 0.08-M31-004427.76 in filter V on MJD 59409.370
---- 16.46± 0.07-M31-004427.76 in filter R on MJD 59409.370
----
59441.26 17.15± 0.07-M31-004427.76 in filter V on MJD 59441.260
 18.16± 0.08-M31-004427.76 in filter B on MJD 59441.260
---- 15.86± 0.09-M31-004427.76 in filter I on MJD 59441.260
59467.11 17.04± 0.07-M31-004427.76 in filter V on MJD 59467.110
---- 16.41± 0.06-M31-004427.76 in filter R on MJD 59467.110
----
59522.04 17.17± 0.07-M31-004427.76 in filter V on MJD 59522.040
 18.20± 0.07-M31-004427.76 in filter B on MJD 59522.040
---- 15.88± 0.11-M31-004427.76 in filter I on MJD 59522.040
59546.05 17.14± 0.07-M31-004427.76 in filter V on MJD 59546.050
---- 16.49± 0.07-M31-004427.76 in filter R on MJD 59546.050
----
59583.10 17.16± 0.07-M31-004427.76 in filter V on MJD 59583.100
 18.22± 0.07-M31-004427.76 in filter B on MJD 59583.100
--------
59739.36 17.13± 0.07-M31-004427.76 in filter V on MJD 59739.360
 18.12± 0.08-M31-004427.76 in filter B on MJD 59739.360
 16.48± 0.07-M31-004427.76 in filter R on MJD 59739.360
----
59816.14 17.09± 0.07-M31-004427.76 in filter V on MJD 59816.140
-------- 15.76± 0.06-M31-004427.76 in filter I on MJD 59816.140
59851.09 17.17± 0.07-M31-004427.76 in filter V on MJD 59851.090
 18.15± 0.08-M31-004427.76 in filter B on MJD 59851.090
 16.50± 0.07-M31-004427.76 in filter R on MJD 59851.090
----
59879.03 17.17± 0.07-M31-004427.76 in filter V on MJD 59879.030
-------- 15.87± 0.07-M31-004427.76 in filter I on MJD 59879.030
59905.07 17.18± 0.07-M31-004427.76 in filter V on MJD 59905.070
 18.21± 0.07-M31-004427.76 in filter B on MJD 59905.070
 16.52± 0.07-M31-004427.76 in filter R on MJD 59905.070
----
60147.26 17.10± 0.07AM31-004427.76 in filter V on MJD 60147.260
M31-004427.76 in filter V on MJD 60147.260
 18.19± 0.07-M31-004427.76 in filter B on MJD 60147.260
 16.40± 0.07-M31-004427.76 in filter R on MJD 60147.260
----
60172.19 17.12± 0.07AM31-004427.76 in filter V on MJD 60172.190
M31-004427.76 in filter V on MJD 60172.190
 18.14± 0.07-M31-004427.76 in filter B on MJD 60172.190
 16.46± 0.06-M31-004427.76 in filter R on MJD 60172.190
 15.80± 0.08AM31-004427.76 in filter I on MJD 60172.190
M31-004427.76 in filter I on MJD 60172.190
60201.09 17.11± 0.07-M31-004427.76 in filter V on MJD 60201.090
---- 16.41± 0.07-M31-004427.76 in filter R on MJD 60201.090
----
60202.10 17.14± 0.06-M31-004427.76 in filter V on MJD 60202.100
 18.21± 0.08-M31-004427.76 in filter B on MJD 60202.100
--------
60251.02 17.13± 0.07AM31-004427.76 in filter V on MJD 60251.020
M31-004427.76 in filter V on MJD 60251.020
 18.05± 0.07-M31-004427.76 in filter B on MJD 60251.020
---- 15.82± 0.07-M31-004427.76 in filter I on MJD 60251.020
60290.08 17.16± 0.07AM31-004427.76 in filter V on MJD 60290.080
M31-004427.76 in filter V on MJD 60290.080
---- 16.49± 0.07-M31-004427.76 in filter R on MJD 60290.080
 15.81± 0.09-M31-004427.76 in filter I on MJD 60290.080
60469.36 17.13± 0.07AM31-004427.76 in filter V on MJD 60469.360
M31-004427.76 in filter V on MJD 60469.360
 18.02± 0.07-M31-004427.76 in filter B on MJD 60469.360
 16.49± 0.08-M31-004427.76 in filter R on MJD 60469.360
----
60504.32 17.21± 0.07AM31-004427.76 in filter V on MJD 60504.320
M31-004427.76 in filter V on MJD 60504.320
 18.14± 0.08-M31-004427.76 in filter B on MJD 60504.320
 16.51± 0.06-M31-004427.76 in filter R on MJD 60504.320
----
60529.23 17.15± 0.07-M31-004427.76 in filter V on MJD 60529.230
-------- 15.84± 0.06-M31-004427.76 in filter I on MJD 60529.230
60533.25 17.19± 0.07TM31-004427.76 in filter V on MJD 60533.250
------------
60555.14 17.14± 0.06AM31-004427.76 in filter V on MJD 60555.140
M31-004427.76 in filter V on MJD 60555.140
 18.08± 0.07-M31-004427.76 in filter B on MJD 60555.140
 16.46± 0.06AM31-004427.76 in filter R on MJD 60555.140
M31-004427.76 in filter R on MJD 60555.140
 15.84± 0.09-M31-004427.76 in filter I on MJD 60555.140
60587.10 17.09± 0.06-M31-004427.76 in filter V on MJD 60587.100
-------- 15.79± 0.06-M31-004427.76 in filter I on MJD 60587.100
60594.07 17.09± 0.07-M31-004427.76 in filter V on MJD 60594.070
 18.05± 0.08-M31-004427.76 in filter B on MJD 60594.070
 16.40± 0.07-M31-004427.76 in filter R on MJD 60594.070
----
60649.08 17.16± 0.07-M31-004427.76 in filter V on MJD 60649.080
 18.15± 0.07-M31-004427.76 in filter B on MJD 60649.080
 16.50± 0.07-M31-004427.76 in filter R on MJD 60649.080
----
60651.11 17.11± 0.06-M31-004427.76 in filter V on MJD 60651.110
-------- 15.77± 0.09-M31-004427.76 in filter I on MJD 60651.110
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 M31-004427.76Plot of color for M31-004427.76

Key for Plot Variability Photometry Table Target Notes

Variability

Plot/Graph Photometry Table Target Notes

It is 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 [0.23 mag]B [0.29 mag]R [0.27 mag]
B [0.29 mag]0.33 (38)
R [0.27 mag]0.76 (34)0.34 (21)
I [0.18 mag]0.68 (28)0.26 (10)0.30 (7)

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 M31-004427.76

Plot to assess correlation between bands for M31-004427.76

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)		0.32 | 1.21
R
(I|R)		0.61 | 0.94-2.09 | 0.02
I
(I|R)		0.42 | 0.970.25 | 1.810.10 | 0.86

Back to catalog index

By John C. Martin, University of Illinois Springfield Henry R. Barber Research Observatory

Generated on 2025-08-04 15:53:14 UT-5