Color composite thumbnail image of M31-004411.36M31-004411.36 (J004411.36+413257.2)



Target Notes

Color composite thumbnail image of M31-004411.36

Classification: Fe_emission

(Candidate LBV) 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
56142.31 18.02± 0.08TM31-004411.36 in filter V on MJD  56142.310
M31-004411.36 in filter V on MJD  56142.310
------------
56267.15-------- 17.35± 0.03TM31-004411.36 in filter R on MJD  56267.150
M31-004411.36 in filter R on MJD  56267.150
----
56490.36 17.94± 0.05AM31-004411.36 in filter V on MJD  56490.360
M31-004411.36 in filter V on MJD  56490.360
18.67± 0.07AM31-004411.36 in filter B on MJD  56490.360
M31-004411.36 in filter B on MJD  56490.360
--------
56536.23 17.92± 0.07AM31-004411.36 in filter V on MJD  56536.230
M31-004411.36 in filter V on MJD  56536.230
---- 17.38± 0.04AM31-004411.36 in filter R on MJD  56536.230
M31-004411.36 in filter R on MJD  56536.230
----
56915.13 17.99± 0.05-M31-004411.36 in filter V on MJD  56915.130
18.62± 0.07-M31-004411.36 in filter B on MJD  56915.130
17.26± 0.04-M31-004411.36 in filter R on MJD  56915.130
----
57227.31 18.02± 0.04-M31-004411.36 in filter V on MJD  57227.310
18.71± 0.05-M31-004411.36 in filter B on MJD  57227.310
17.34± 0.04-M31-004411.36 in filter R on MJD  57227.310
----
57310.08 18.15± 0.05XM31-004411.36 in filter V on MJD  57310.080
-------- 17.22± 0.07XM31-004411.36 in filter I on MJD  57310.080
57633.28 17.96± 0.04-M31-004411.36 in filter V on MJD  57633.280
18.66± 0.06-M31-004411.36 in filter B on MJD  57633.280
17.29± 0.04-M31-004411.36 in filter R on MJD  57633.280
----
57638.27 17.96± 0.05-M31-004411.36 in filter V on MJD  57638.270
-------- 16.89± 0.04-M31-004411.36 in filter I on MJD  57638.270
57928.37 18.02± 0.04-M31-004411.36 in filter V on MJD  57928.370
18.57± 0.07-M31-004411.36 in filter B on MJD  57928.370
17.31± 0.05-M31-004411.36 in filter R on MJD  57928.370
16.88± 0.07-M31-004411.36 in filter I on MJD  57928.370
57958.29 18.05± 0.05-M31-004411.36 in filter V on MJD  57958.290
18.59± 0.06-M31-004411.36 in filter B on MJD  57958.290
---- 16.89± 0.05-M31-004411.36 in filter I on MJD  57958.290
57988.34 18.16± 0.04-M31-004411.36 in filter V on MJD  57988.340
18.79± 0.04-M31-004411.36 in filter B on MJD  57988.340
17.45± 0.03-M31-004411.36 in filter R on MJD  57988.340
17.14± 0.04-M31-004411.36 in filter I on MJD  57988.340
58043.06 18.00± 0.04-M31-004411.36 in filter V on MJD  58043.060
18.55± 0.06-M31-004411.36 in filter B on MJD  58043.060
---- 16.97± 0.06-M31-004411.36 in filter I on MJD  58043.060
58077.11 18.30± 0.07-M31-004411.36 in filter V on MJD  58077.110
18.81± 0.08-M31-004411.36 in filter B on MJD  58077.110
17.62± 0.06-M31-004411.36 in filter R on MJD  58077.110
17.09± 0.06-M31-004411.36 in filter I on MJD  58077.110
58098.09 18.06± 0.05-M31-004411.36 in filter V on MJD  58098.090
18.74± 0.05-M31-004411.36 in filter B on MJD  58098.090
17.32± 0.04AM31-004411.36 in filter R on MJD  58098.090
M31-004411.36 in filter R on MJD  58098.090
----
58312.29 18.08± 0.05-M31-004411.36 in filter V on MJD  58312.290
18.72± 0.06-M31-004411.36 in filter B on MJD  58312.290
17.38± 0.04-M31-004411.36 in filter R on MJD  58312.290
----
58316.26 17.99± 0.05-M31-004411.36 in filter V on MJD  58316.260
-------- 16.91± 0.04-M31-004411.36 in filter I on MJD  58316.260
58341.23 18.07± 0.06-M31-004411.36 in filter V on MJD  58341.230
18.77± 0.08-M31-004411.36 in filter B on MJD  58341.230
--------
58366.12 18.07± 0.04-M31-004411.36 in filter V on MJD  58366.120
18.72± 0.06-M31-004411.36 in filter B on MJD  58366.120
--------
58375.12 18.00± 0.04-M31-004411.36 in filter V on MJD  58375.120
---- 17.38± 0.04-M31-004411.36 in filter R on MJD  58375.120
----
58403.08 18.08± 0.04-M31-004411.36 in filter V on MJD  58403.080
-------- 16.95± 0.06-M31-004411.36 in filter I on MJD  58403.080
58433.09 17.97± 0.07-M31-004411.36 in filter V on MJD  58433.090
18.66± 0.07-M31-004411.36 in filter B on MJD  58433.090
17.31± 0.06-M31-004411.36 in filter R on MJD  58433.090
----
58671.33 18.00± 0.06AM31-004411.36 in filter V on MJD  58671.330
M31-004411.36 in filter V on MJD  58671.330
18.74± 0.08AM31-004411.36 in filter B on MJD  58671.330
M31-004411.36 in filter B on MJD  58671.330
--------
58673.29 17.99± 0.07-M31-004411.36 in filter V on MJD  58673.290
---- 17.30± 0.07-M31-004411.36 in filter R on MJD  58673.290
16.80± 0.08-M31-004411.36 in filter I on MJD  58673.290
58695.34 17.85± 0.05-M31-004411.36 in filter V on MJD  58695.340
---- 17.23± 0.04-M31-004411.36 in filter R on MJD  58695.340
16.80± 0.04-M31-004411.36 in filter I on MJD  58695.340
58696.30 17.93± 0.07-M31-004411.36 in filter V on MJD  58696.300
18.56± 0.07-M31-004411.36 in filter B on MJD  58696.300
17.27± 0.07-M31-004411.36 in filter R on MJD  58696.300
M31-004411.36 in filter R on MJD  58696.300
----
58750.10 17.94± 0.06AM31-004411.36 in filter V on MJD  58750.100
M31-004411.36 in filter V on MJD  58750.100
18.59± 0.06AM31-004411.36 in filter B on MJD  58750.100
M31-004411.36 in filter B on MJD  58750.100
--------
58779.07 18.11± 0.06AM31-004411.36 in filter V on MJD  58779.070
M31-004411.36 in filter V on MJD  58779.070
---- 17.42± 0.04AM31-004411.36 in filter R on MJD  58779.070
M31-004411.36 in filter R on MJD  58779.070
----
58812.08 18.01± 0.06AM31-004411.36 in filter V on MJD  58812.080
M31-004411.36 in filter V on MJD  58812.080
---- 17.35± 0.07-M31-004411.36 in filter R on MJD  58812.080
16.91± 0.04-M31-004411.36 in filter I on MJD  58812.080
59000.39 18.02± 0.09-M31-004411.36 in filter V on MJD  59000.390
---- 17.37± 0.13-M31-004411.36 in filter R on MJD  59000.390
----
59055.31 17.99± 0.08-M31-004411.36 in filter V on MJD  59055.310
---- 17.34± 0.09-M31-004411.36 in filter R on MJD  59055.310
----
59077.20 18.00± 0.07-M31-004411.36 in filter V on MJD  59077.200
18.54± 0.08-M31-004411.36 in filter B on MJD  59077.200
17.34± 0.07-M31-004411.36 in filter R on MJD  59077.200
16.87± 0.10-M31-004411.36 in filter I on MJD  59077.200
59131.09 17.94± 0.07-M31-004411.36 in filter V on MJD  59131.090
---- 17.35± 0.07-M31-004411.36 in filter R on MJD  59131.090
----
59166.12 18.01± 0.07-M31-004411.36 in filter V on MJD  59166.120
-------- 16.95± 0.09-M31-004411.36 in filter I on MJD  59166.120
59194.11 18.00± 0.07-M31-004411.36 in filter V on MJD  59194.110
18.66± 0.07-M31-004411.36 in filter B on MJD  59194.110
--------
59376.35 17.99± 0.07-M31-004411.36 in filter V on MJD  59376.350
18.66± 0.08-M31-004411.36 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 M31-004411.36Plot of color for M31-004411.36

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 [0.27 mag]B [0.45 mag]R [0.38 mag]
B [0.27 mag]0.44 (20)
R [0.38 mag]0.76 (20)0.53 (11)
I [0.35 mag]0.69 (13)0.83 (6)0.75 (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 M31-004411.36

Plot to assess correlation between bands for M31-004411.36

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)
1.29 | 0.94
R
(I|R)
2.47 | 0.971.68 | 0.04
I
(I|R)
3.30 | 0.943.81 | 0.955.86 | 0.88

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