Color composite thumbnail image of M31-004526.62M31-004526.62 (J004526.62+415006.3)



Target Notes

Color composite thumbnail image of M31-004526.62

Classification: LBV

Not resolved from J004526.58+415005.8 less than one arcsecond N. According to LGGS the unresolved neighbor has odd colors with comparable brightness in BRI but contributes -0.04 mag in V.

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
56537.24 16.35± 0.05bM31-004526.62 in filter V on MJD  56537.240
---- 15.99± 0.06BM31-004526.62 in filter R on MJD  56537.240
----
56593.10 16.35± 0.03bM31-004526.62 in filter V on MJD  56593.100
---- 16.00± 0.04BM31-004526.62 in filter R on MJD  56593.100
----
56951.07 16.50± 0.05bM31-004526.62 in filter V on MJD  56951.070
16.86± 0.04BM31-004526.62 in filter B on MJD  56951.070
16.17± 0.06BM31-004526.62 in filter R on MJD  56951.070
----
56982.20 16.51± 0.06bM31-004526.62 in filter V on MJD  56982.200
16.88± 0.05BM31-004526.62 in filter B on MJD  56982.200
--------
57036.13 16.47± 0.06bM31-004526.62 in filter V on MJD  57036.130
16.83± 0.04BM31-004526.62 in filter B on MJD  57036.130
--------
57309.14 16.41± 0.05bM31-004526.62 in filter V on MJD  57309.140
16.75± 0.04BM31-004526.62 in filter B on MJD  57309.140
16.09± 0.06BM31-004526.62 in filter R on MJD  57309.140
----
57340.21 16.47± 0.03bM31-004526.62 in filter V on MJD  57340.210
-------- 15.86± 0.06BM31-004526.62 in filter I on MJD  57340.210
57633.35 16.78± 0.05bM31-004526.62 in filter V on MJD  57633.350
17.05± 0.05BM31-004526.62 in filter B on MJD  57633.350
16.38± 0.05BM31-004526.62 in filter R on MJD  57633.350
----
57638.29 16.78± 0.04bM31-004526.62 in filter V on MJD  57638.290
-------- 16.19± 0.05BM31-004526.62 in filter I on MJD  57638.290
57958.32 17.50± 0.06bM31-004526.62 in filter V on MJD  57958.320
17.82± 0.07BM31-004526.62 in filter B on MJD  57958.320
---- 17.06± 0.13BM31-004526.62 in filter I on MJD  57958.320
57963.28 17.53± 0.06bM31-004526.62 in filter V on MJD  57963.280
17.88± 0.08BM31-004526.62 in filter B on MJD  57963.280
17.17± 0.06BM31-004526.62 in filter R on MJD  57963.280
----
58045.07 17.39± 0.05bM31-004526.62 in filter V on MJD  58045.070
17.71± 0.05BM31-004526.62 in filter B on MJD  58045.070
17.18± 0.06BM31-004526.62 in filter R on MJD  58045.070
----
58067.12 17.53± 0.05bM31-004526.62 in filter V on MJD  58067.120
-------- 17.01± 0.07BM31-004526.62 in filter I on MJD  58067.120
58098.12 17.56± 0.07bM31-004526.62 in filter V on MJD  58098.120
17.79± 0.06BM31-004526.62 in filter B on MJD  58098.120
--------
58312.32 17.52± 0.05bM31-004526.62 in filter V on MJD  58312.320
17.75± 0.05BM31-004526.62 in filter B on MJD  58312.320
17.18± 0.06BM31-004526.62 in filter R on MJD  58312.320
----
58316.28 17.50± 0.04bM31-004526.62 in filter V on MJD  58316.280
-------- 16.98± 0.06BM31-004526.62 in filter I on MJD  58316.280
58341.25 17.62± 0.06bM31-004526.62 in filter V on MJD  58341.250
17.96± 0.10BM31-004526.62 in filter B on MJD  58341.250
--------
58366.14 17.51± 0.05bM31-004526.62 in filter V on MJD  58366.140
17.71± 0.04BM31-004526.62 in filter B on MJD  58366.140
--------
58372.12 17.41± 0.04bM31-004526.62 in filter V on MJD  58372.120
-------- 17.07± 0.06BM31-004526.62 in filter I on MJD  58372.120
58403.12 17.53± 0.05bM31-004526.62 in filter V on MJD  58403.120
---- 17.20± 0.06BM31-004526.62 in filter R on MJD  58403.120
----
58420.03 17.60± 0.08bM31-004526.62 in filter V on MJD  58420.030
17.70± 0.07BM31-004526.62 in filter B on MJD  58420.030
--------
58436.02 17.46± 0.06bM31-004526.62 in filter V on MJD  58436.020
17.55± 0.04BM31-004526.62 in filter B on MJD  58436.020
17.25± 0.10BM31-004526.62 in filter R on MJD  58436.020
----
58671.30 17.11± 0.04bM31-004526.62 in filter V on MJD  58671.300
17.39± 0.05BM31-004526.62 in filter B on MJD  58671.300
--------
58672.32 16.96± 0.05bM31-004526.62 in filter V on MJD  58672.320
---- 16.68± 0.07BM31-004526.62 in filter R on MJD  58672.320
16.39± 0.07BM31-004526.62 in filter I on MJD  58672.320
58695.30 16.93± 0.04AbM31-004526.62 in filter V on MJD  58695.300
M31-004526.62 in filter V on MJD  58695.300
17.21± 0.04BM31-004526.62 in filter B on MJD  58695.300
16.66± 0.04BM31-004526.62 in filter R on MJD  58695.300
16.45± 0.05BM31-004526.62 in filter I on MJD  58695.300
58696.28 16.95± 0.04bM31-004526.62 in filter V on MJD  58696.280
---- 16.65± 0.04BM31-004526.62 in filter R on MJD  58696.280
M31-004526.62 in filter R on MJD  58696.280
16.43± 0.06BM31-004526.62 in filter I on MJD  58696.280
M31-004526.62 in filter I on MJD  58696.280
58757.08 16.91± 0.04bM31-004526.62 in filter V on MJD  58757.080
---- 16.57± 0.04BM31-004526.62 in filter R on MJD  58757.080
----
58784.04 16.91± 0.04bM31-004526.62 in filter V on MJD  58784.040
17.18± 0.04BM31-004526.62 in filter B on MJD  58784.040
--------
58812.10 16.93± 0.03bM31-004526.62 in filter V on MJD  58812.100
---- 16.60± 0.04BM31-004526.62 in filter R on MJD  58812.100
----
58836.18 16.86± 0.03bM31-004526.62 in filter V on MJD  58836.180
-------- 16.30± 0.04BM31-004526.62 in filter I on MJD  58836.180
59001.39 16.95± 0.05bM31-004526.62 in filter V on MJD  59001.390
---- 16.50± 0.04BM31-004526.62 in filter R on MJD  59001.390
----
59059.31 16.95± 0.03bM31-004526.62 in filter V on MJD  59059.310
17.24± 0.03BM31-004526.62 in filter B on MJD  59059.310
16.64± 0.04BM31-004526.62 in filter R on MJD  59059.310
----
59077.22 16.97± 0.06bM31-004526.62 in filter V on MJD  59077.220
---- 16.61± 0.05BM31-004526.62 in filter R on MJD  59077.220
----
59081.22 16.90± 0.04bM31-004526.62 in filter V on MJD  59081.220
-------- 16.35± 0.05BM31-004526.62 in filter I on MJD  59081.220
59131.05 16.88± 0.04bM31-004526.62 in filter V on MJD  59131.050
17.21± 0.05BM31-004526.62 in filter B on MJD  59131.050
--------
59136.11 17.23± 0.11bM31-004526.62 in filter V on MJD  59136.110
17.23± 0.11BM31-004526.62 in filter B on MJD  59136.110
16.84± 0.10BM31-004526.62 in filter R on MJD  59136.110
----
59166.07 16.84± 0.05bM31-004526.62 in filter V on MJD  59166.070
M31-004526.62 in filter V on MJD  59166.070
-------- 16.23± 0.06BM31-004526.62 in filter I on MJD  59166.070
M31-004526.62 in filter I on MJD  59166.070
59166.25 16.82± 0.03bM31-004526.62 in filter V on MJD  59166.250
M31-004526.62 in filter V on MJD  59166.250
-------- 16.24± 0.05BM31-004526.62 in filter I on MJD  59166.250
M31-004526.62 in filter I on MJD  59166.250
59376.36 16.82± 0.04bM31-004526.62 in filter V on MJD  59376.360
17.17± 0.06BM31-004526.62 in filter B on MJD  59376.360
--------
59380.36 16.70± 0.03bM31-004526.62 in filter V on MJD  59380.360
---- 16.49± 0.09BM31-004526.62 in filter R on MJD  59380.360
----
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 M31-004526.62Plot of color for M31-004526.62

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 [1.21 mag]B [1.27 mag]R [1.26 mag]
B [1.21 mag]0.95 (21)
R [1.26 mag]0.98 (20)0.91 (10)
I [1.21 mag]0.98 (13)-.-- (2) 0.73 (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 M31-004526.62

Plot to assess correlation between bands for M31-004526.62

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)
56.09 | 0.95
R
(I|R)
54.03 | 1.2450.67 | 0.72
I
(I|R)
42.78 | 1.24--- | --- --- | ----

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