Color composite thumbnail image of M31-004522.58M31-004522.58 (J004522.58+415034.8)



Target Notes

Color composite thumbnail image of M31-004522.58

Classification: Warm-Hypergiant

No blend concerns. PSF fits with parameters outside acceptable range are marked "X."

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 18.56± 0.07-M31-004522.58 in filter V on MJD  56537.240
---- 18.28± 0.08-M31-004522.58 in filter R on MJD  56537.240
----
56593.10 18.52± 0.05-M31-004522.58 in filter V on MJD  56593.100
---- 18.27± 0.06-M31-004522.58 in filter R on MJD  56593.100
----
56951.07 18.58± 0.07-M31-004522.58 in filter V on MJD  56951.070
18.80± 0.06-M31-004522.58 in filter B on MJD  56951.070
18.15± 0.07-M31-004522.58 in filter R on MJD  56951.070
----
56982.20 18.50± 0.06-M31-004522.58 in filter V on MJD  56982.200
18.62± 0.05-M31-004522.58 in filter B on MJD  56982.200
--------
57036.13 18.50± 0.08-M31-004522.58 in filter V on MJD  57036.130
18.66± 0.07-M31-004522.58 in filter B on MJD  57036.130
--------
57309.14 18.51± 0.06-M31-004522.58 in filter V on MJD  57309.140
18.68± 0.05-M31-004522.58 in filter B on MJD  57309.140
18.13± 0.07-M31-004522.58 in filter R on MJD  57309.140
----
57340.21 18.63± 0.05-M31-004522.58 in filter V on MJD  57340.210
-------- 18.18± 0.09XM31-004522.58 in filter I on MJD  57340.210
57633.35 18.45± 0.05-M31-004522.58 in filter V on MJD  57633.350
18.59± 0.06-M31-004522.58 in filter B on MJD  57633.350
18.11± 0.06-M31-004522.58 in filter R on MJD  57633.350
----
57638.29 18.46± 0.06-M31-004522.58 in filter V on MJD  57638.290
-------- 18.03± 0.07-M31-004522.58 in filter I on MJD  57638.290
57958.32 18.65± 0.09-M31-004522.58 in filter V on MJD  57958.320
18.72± 0.11-M31-004522.58 in filter B on MJD  57958.320
---- 17.77± 0.10XM31-004522.58 in filter I on MJD  57958.320
57963.28 18.53± 0.07-M31-004522.58 in filter V on MJD  57963.280
18.66± 0.07-M31-004522.58 in filter B on MJD  57963.280
18.10± 0.07-M31-004522.58 in filter R on MJD  57963.280
----
58045.07 18.54± 0.06-M31-004522.58 in filter V on MJD  58045.070
18.73± 0.06-M31-004522.58 in filter B on MJD  58045.070
18.20± 0.07-M31-004522.58 in filter R on MJD  58045.070
----
58067.12 18.49± 0.06-M31-004522.58 in filter V on MJD  58067.120
-------- 18.10± 0.10-M31-004522.58 in filter I on MJD  58067.120
58098.12 18.46± 0.07-M31-004522.58 in filter V on MJD  58098.120
18.64± 0.06-M31-004522.58 in filter B on MJD  58098.120
--------
58312.32 18.50± 0.06-M31-004522.58 in filter V on MJD  58312.320
18.68± 0.06-M31-004522.58 in filter B on MJD  58312.320
18.16± 0.06-M31-004522.58 in filter R on MJD  58312.320
----
58316.28 18.55± 0.05-M31-004522.58 in filter V on MJD  58316.280
-------- 18.14± 0.08-M31-004522.58 in filter I on MJD  58316.280
58341.25 18.46± 0.06-M31-004522.58 in filter V on MJD  58341.250
18.60± 0.07-M31-004522.58 in filter B on MJD  58341.250
--------
58366.14 18.55± 0.06-M31-004522.58 in filter V on MJD  58366.140
18.71± 0.06-M31-004522.58 in filter B on MJD  58366.140
--------
58372.12 18.66± 0.07-M31-004522.58 in filter V on MJD  58372.120
-------- 18.34± 0.10-M31-004522.58 in filter I on MJD  58372.120
58403.12 18.60± 0.07-M31-004522.58 in filter V on MJD  58403.120
---- 18.22± 0.07-M31-004522.58 in filter R on MJD  58403.120
----
58420.03 18.64± 0.07-M31-004522.58 in filter V on MJD  58420.030
18.75± 0.06-M31-004522.58 in filter B on MJD  58420.030
--------
58436.02 18.51± 0.06-M31-004522.58 in filter V on MJD  58436.020
18.68± 0.06-M31-004522.58 in filter B on MJD  58436.020
18.17± 0.07-M31-004522.58 in filter R on MJD  58436.020
----
58671.30 18.58± 0.06-M31-004522.58 in filter V on MJD  58671.300
18.80± 0.06-M31-004522.58 in filter B on MJD  58671.300
--------
58672.32 18.53± 0.06-M31-004522.58 in filter V on MJD  58672.320
---- 18.15± 0.06-M31-004522.58 in filter R on MJD  58672.320
17.95± 0.09-M31-004522.58 in filter I on MJD  58672.320
58695.30 18.47± 0.05AM31-004522.58 in filter V on MJD  58695.300
M31-004522.58 in filter V on MJD  58695.300
18.67± 0.06-M31-004522.58 in filter B on MJD  58695.300
18.22± 0.05-M31-004522.58 in filter R on MJD  58695.300
18.12± 0.07-M31-004522.58 in filter I on MJD  58695.300
58696.28 18.51± 0.05-M31-004522.58 in filter V on MJD  58696.280
---- 18.19± 0.05-M31-004522.58 in filter R on MJD  58696.280
M31-004522.58 in filter R on MJD  58696.280
18.21± 0.08-M31-004522.58 in filter I on MJD  58696.280
M31-004522.58 in filter I on MJD  58696.280
58757.08 18.51± 0.05-M31-004522.58 in filter V on MJD  58757.080
---- 18.15± 0.05-M31-004522.58 in filter R on MJD  58757.080
----
58784.04 18.45± 0.04-M31-004522.58 in filter V on MJD  58784.040
18.63± 0.05-M31-004522.58 in filter B on MJD  58784.040
--------
58812.10 18.49± 0.04-M31-004522.58 in filter V on MJD  58812.100
---- 18.14± 0.05-M31-004522.58 in filter R on MJD  58812.100
----
58836.18 18.56± 0.05-M31-004522.58 in filter V on MJD  58836.180
-------- 18.14± 0.09-M31-004522.58 in filter I on MJD  58836.180
59001.38 18.53± 0.06AM31-004522.58 in filter V on MJD  59001.380
M31-004522.58 in filter V on MJD  59001.380
---- 18.16± 0.07AM31-004522.58 in filter R on MJD  59001.380
M31-004522.58 in filter R on MJD  59001.380
----
59055.33 18.51± 0.04-M31-004522.58 in filter V on MJD  59055.330
18.74± 0.05-M31-004522.58 in filter B on MJD  59055.330
---- 18.09± 0.07-M31-004522.58 in filter I on MJD  59055.330
59059.31 18.46± 0.04-M31-004522.58 in filter V on MJD  59059.310
18.64± 0.04-M31-004522.58 in filter B on MJD  59059.310
18.14± 0.04-M31-004522.58 in filter R on MJD  59059.310
----
59077.22 18.54± 0.06-M31-004522.58 in filter V on MJD  59077.220
---- 18.12± 0.05-M31-004522.58 in filter R on MJD  59077.220
----
59081.22 18.52± 0.05-M31-004522.58 in filter V on MJD  59081.220
-------- 18.14± 0.07-M31-004522.58 in filter I on MJD  59081.220
59131.05 18.47± 0.06-M31-004522.58 in filter V on MJD  59131.050
18.73± 0.07-M31-004522.58 in filter B on MJD  59131.050
--------
59136.11 18.50± 0.05-M31-004522.58 in filter V on MJD  59136.110
18.72± 0.05-M31-004522.58 in filter B on MJD  59136.110
18.24± 0.05-M31-004522.58 in filter R on MJD  59136.110
----
59166.07 18.53± 0.05-M31-004522.58 in filter V on MJD  59166.070
M31-004522.58 in filter V on MJD  59166.070
-------- 18.18± 0.08-M31-004522.58 in filter I on MJD  59166.070
M31-004522.58 in filter I on MJD  59166.070
59166.25 18.53± 0.04-M31-004522.58 in filter V on MJD  59166.250
M31-004522.58 in filter V on MJD  59166.250
-------- 18.19± 0.08-M31-004522.58 in filter I on MJD  59166.250
M31-004522.58 in filter I on MJD  59166.250
59194.07 18.52± 0.04-M31-004522.58 in filter V on MJD  59194.070
---- 18.18± 0.05-M31-004522.58 in filter R on MJD  59194.070
----
59380.36 18.60± 0.07-M31-004522.58 in filter V on MJD  59380.360
---- 18.20± 0.06-M31-004522.58 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 M31-004522.58Plot of color for M31-004522.58

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 [0.21 mag]B [0.21 mag]R [0.18 mag]
B [0.21 mag]0.47 (21)
R [0.18 mag]0.10 (21)0.21 (10)
I [0.39 mag]0.46 (12)-.-- (2) 0.44 (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 M31-004522.58

Plot to assess correlation between bands for M31-004522.58

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)
0.62 | 1.23
R
(I|R)
0.18 | 0.740.79 | 0.08
I
(I|R)
0.54 | 0.73--- | --- --- | ----

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