Color composite thumbnail image of M31-004406.32M31-004406.32 (J004406.32+420131.3)



Target Notes

Color composite thumbnail image of M31-004406.32

Classification: YSG

Unable to resolved from star J004406.24+420132.4 (4 magnitude fainter) about 1 arcsecond away. That contributes about -0.03 magnitudes in R and V and -0.06 magnitudes in B.

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
56142.35 15.55± 0.03TbM31-004406.32 in filter V on MJD  56142.350
------------
56267.17-------- 15.34± 0.04TbM31-004406.32 in filter R on MJD  56267.170
----
56537.22 15.56± 0.03bM31-004406.32 in filter V on MJD  56537.220
16.02± 0.03bM31-004406.32 in filter B on MJD  56537.220
15.30± 0.04bM31-004406.32 in filter R on MJD  56537.220
----
56593.08 15.60± 0.03bM31-004406.32 in filter V on MJD  56593.080
---- 15.32± 0.03bM31-004406.32 in filter R on MJD  56593.080
----
57282.18 15.64± 0.03bM31-004406.32 in filter V on MJD  57282.180
16.13± 0.04bM31-004406.32 in filter B on MJD  57282.180
15.36± 0.04bM31-004406.32 in filter R on MJD  57282.180
----
57314.14 15.65± 0.03bM31-004406.32 in filter V on MJD  57314.140
-------- 15.09± 0.05bM31-004406.32 in filter I on MJD  57314.140
57635.41 15.53± 0.07bM31-004406.32 in filter V on MJD  57635.410
15.98± 0.08bM31-004406.32 in filter B on MJD  57635.410
15.25± 0.07bM31-004406.32 in filter R on MJD  57635.410
14.97± 0.07bM31-004406.32 in filter I on MJD  57635.410
57958.32 15.64± 0.06bM31-004406.32 in filter V on MJD  57958.320
16.12± 0.06bM31-004406.32 in filter B on MJD  57958.320
---- 15.09± 0.06bM31-004406.32 in filter I on MJD  57958.320
57963.28 15.65± 0.06bM31-004406.32 in filter V on MJD  57963.280
16.09± 0.05bM31-004406.32 in filter B on MJD  57963.280
15.37± 0.06bM31-004406.32 in filter R on MJD  57963.280
----
58045.07 15.62± 0.04bM31-004406.32 in filter V on MJD  58045.070
16.06± 0.04bM31-004406.32 in filter B on MJD  58045.070
15.31± 0.05bM31-004406.32 in filter R on MJD  58045.070
----
58067.12 15.64± 0.05bM31-004406.32 in filter V on MJD  58067.120
-------- 15.08± 0.07bM31-004406.32 in filter I on MJD  58067.120
58098.12 15.61± 0.06bM31-004406.32 in filter V on MJD  58098.120
16.11± 0.05bM31-004406.32 in filter B on MJD  58098.120
--------
58312.32 15.62± 0.05bM31-004406.32 in filter V on MJD  58312.320
16.09± 0.04bM31-004406.32 in filter B on MJD  58312.320
15.35± 0.05bM31-004406.32 in filter R on MJD  58312.320
----
58316.28 15.67± 0.04bM31-004406.32 in filter V on MJD  58316.280
-------- 15.12± 0.06bM31-004406.32 in filter I on MJD  58316.280
58372.12------------ 15.04± 0.06TbM31-004406.32 in filter I on MJD  58372.120
58403.12 15.57± 0.04bM31-004406.32 in filter V on MJD  58403.120
---- 15.28± 0.06bM31-004406.32 in filter R on MJD  58403.120
----
58671.30 15.70± 0.03TbM31-004406.32 in filter V on MJD  58671.300
------------
58672.32 15.62± 0.05bM31-004406.32 in filter V on MJD  58672.320
---- 15.34± 0.05bM31-004406.32 in filter R on MJD  58672.320
15.02± 0.07bM31-004406.32 in filter I on MJD  58672.320
58695.31 15.61± 0.03bM31-004406.32 in filter V on MJD  58695.310
---- 15.35± 0.04bM31-004406.32 in filter R on MJD  58695.310
15.04± 0.05bM31-004406.32 in filter I on MJD  58695.310
58750.10 15.63± 0.03bM31-004406.32 in filter V on MJD  58750.100
16.06± 0.02bM31-004406.32 in filter B on MJD  58750.100
--------
58779.07 15.59± 0.03bM31-004406.32 in filter V on MJD  58779.070
---- 15.29± 0.04bM31-004406.32 in filter R on MJD  58779.070
----
58836.18 15.62± 0.03bM31-004406.32 in filter V on MJD  58836.180
-------- 15.05± 0.04bM31-004406.32 in filter I on MJD  58836.180
59001.37 15.59± 0.04bM31-004406.32 in filter V on MJD  59001.370
---- 15.30± 0.05bM31-004406.32 in filter R on MJD  59001.370
----
59019.33 15.65± 0.05bM31-004406.32 in filter V on MJD  59019.330
16.10± 0.04bM31-004406.32 in filter B on MJD  59019.330
--------
59055.32 15.62± 0.04AbM31-004406.32 in filter V on MJD  59055.320
M31-004406.32 in filter V on MJD  59055.320
16.07± 0.04bM31-004406.32 in filter B on MJD  59055.320
15.35± 0.03bM31-004406.32 in filter R on MJD  59055.320
15.05± 0.05AbM31-004406.32 in filter I on MJD  59055.320
M31-004406.32 in filter I on MJD  59055.320
59077.22 15.61± 0.04bM31-004406.32 in filter V on MJD  59077.220
---- 15.34± 0.04bM31-004406.32 in filter R on MJD  59077.220
----
59082.20 15.64± 0.03bM31-004406.32 in filter V on MJD  59082.200
16.10± 0.03bM31-004406.32 in filter B on MJD  59082.200
15.34± 0.02bM31-004406.32 in filter R on MJD  59082.200
----
59131.06 15.60± 0.03AbM31-004406.32 in filter V on MJD  59131.060
M31-004406.32 in filter V on MJD  59131.060
16.03± 0.04bM31-004406.32 in filter B on MJD  59131.060
15.30± 0.03bM31-004406.32 in filter R on MJD  59131.060
----
59166.08 15.60± 0.03AbM31-004406.32 in filter V on MJD  59166.080
M31-004406.32 in filter V on MJD  59166.080
-------- 15.03± 0.05AbM31-004406.32 in filter I on MJD  59166.080
M31-004406.32 in filter I on MJD  59166.080
59194.08 15.63± 0.03AbM31-004406.32 in filter V on MJD  59194.080
M31-004406.32 in filter V on MJD  59194.080
16.08± 0.02bM31-004406.32 in filter B on MJD  59194.080
15.34± 0.04bM31-004406.32 in filter R on MJD  59194.080
----
59376.36 15.61± 0.04bM31-004406.32 in filter V on MJD  59376.360
16.09± 0.05bM31-004406.32 in filter B on MJD  59376.360
--------
59379.35 15.60± 0.03bM31-004406.32 in filter V on MJD  59379.350
---- 15.30± 0.03bM31-004406.32 in filter R on MJD  59379.350
----
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 M31-004406.32Plot of color for M31-004406.32

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 [0.15 mag]B [0.18 mag]R [0.11 mag]
B [0.15 mag]0.72 (15)
R [0.11 mag]0.83 (18)0.89 (10)
I [0.15 mag]0.90 (10)0.98 (3)0.91 (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 M31-004406.32

Plot to assess correlation between bands for M31-004406.32

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)
0.56 | 1.41
R
(I|R)
0.41 | 0.93-0.09 | 0.04
I
(I|R)
0.49 | 1.10--- | --- --- | ----

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