Color composite thumbnail image of M31-004341.84M31-004341.84 (J004341.84+411112.0)



Target Notes

Color composite thumbnail image of M31-004341.84

Classification: Of/late-WN

One LGGS star 2 magnitudes fainter 4 arcseconds to S does not interfere sigificantly with PSF fit. Seven other LGGS stars >3.5 magnitudes fainter within 5 arcseconds.

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
56142.33 17.41± 0.06TbM31-004341.84 in filter V on MJD  56142.330
M31-004341.84 in filter V on MJD  56142.330
------------
56267.15-------- 17.00± 0.05TbM31-004341.84 in filter R on MJD  56267.150
M31-004341.84 in filter R on MJD  56267.150
----
56490.38 17.40± 0.04TbM31-004341.84 in filter V on MJD  56490.380
------------
56536.26 17.46± 0.05bM31-004341.84 in filter V on MJD  56536.260
---- 17.01± 0.06bM31-004341.84 in filter R on MJD  56536.260
----
56537.18 17.50± 0.04AbM31-004341.84 in filter V on MJD  56537.180
M31-004341.84 in filter V on MJD  56537.180
17.96± 0.06AbM31-004341.84 in filter B on MJD  56537.180
M31-004341.84 in filter B on MJD  56537.180
17.14± 0.04bM31-004341.84 in filter R on MJD  56537.180
M31-004341.84 in filter R on MJD  56537.180
----
56915.16 17.51± 0.04bM31-004341.84 in filter V on MJD  56915.160
17.89± 0.06bM31-004341.84 in filter B on MJD  56915.160
17.02± 0.05bM31-004341.84 in filter R on MJD  56915.160
----
57227.34 17.50± 0.04bM31-004341.84 in filter V on MJD  57227.340
17.94± 0.05bM31-004341.84 in filter B on MJD  57227.340
16.99± 0.04bM31-004341.84 in filter R on MJD  57227.340
----
57310.10 17.46± 0.04bM31-004341.84 in filter V on MJD  57310.100
-------- 16.69± 0.07bM31-004341.84 in filter I on MJD  57310.100
57633.35 17.43± 0.05AbM31-004341.84 in filter V on MJD  57633.350
M31-004341.84 in filter V on MJD  57633.350
17.87± 0.06AbM31-004341.84 in filter B on MJD  57633.350
M31-004341.84 in filter B on MJD  57633.350
16.96± 0.04AbM31-004341.84 in filter R on MJD  57633.350
M31-004341.84 in filter R on MJD  57633.350
----
57635.35 17.44± 0.05bM31-004341.84 in filter V on MJD  57635.350
-------- 16.66± 0.06bM31-004341.84 in filter I on MJD  57635.350
57638.25 17.44± 0.04bM31-004341.84 in filter V on MJD  57638.250
-------- 16.71± 0.07bM31-004341.84 in filter I on MJD  57638.250
57888.07 17.59± 0.10XM31-004341.84 in filter V on MJD  57888.070
17.97± 0.21XM31-004341.84 in filter B on MJD  57888.070
16.90± 0.08XM31-004341.84 in filter R on MJD  57888.070
----
57928.32 17.34± 0.05bM31-004341.84 in filter V on MJD  57928.320
17.80± 0.07bM31-004341.84 in filter B on MJD  57928.320
16.85± 0.06bM31-004341.84 in filter R on MJD  57928.320
16.51± 0.08bM31-004341.84 in filter I on MJD  57928.320
57958.26 17.60± 0.07bM31-004341.84 in filter V on MJD  57958.260
18.00± 0.08bM31-004341.84 in filter B on MJD  57958.260
---- 16.75± 0.06bM31-004341.84 in filter I on MJD  57958.260
57963.26 17.44± 0.06bM31-004341.84 in filter V on MJD  57963.260
17.84± 0.07bM31-004341.84 in filter B on MJD  57963.260
--------
57988.22 17.54± 0.07bM31-004341.84 in filter V on MJD  57988.220
18.01± 0.08bM31-004341.84 in filter B on MJD  57988.220
---- 16.61± 0.06bM31-004341.84 in filter I on MJD  57988.220
58035.03 17.45± 0.04bM31-004341.84 in filter V on MJD  58035.030
---- 17.00± 0.04bM31-004341.84 in filter R on MJD  58035.030
----
58043.05 17.51± 0.05bM31-004341.84 in filter V on MJD  58043.050
17.99± 0.06bM31-004341.84 in filter B on MJD  58043.050
17.04± 0.04bM31-004341.84 in filter R on MJD  58043.050
----
58045.05 17.53± 0.05bM31-004341.84 in filter V on MJD  58045.050
-------- 16.68± 0.07bM31-004341.84 in filter I on MJD  58045.050
58067.10 17.40± 0.05bM31-004341.84 in filter V on MJD  58067.100
-------- 16.61± 0.06bM31-004341.84 in filter I on MJD  58067.100
58073.09 17.50± 0.06bM31-004341.84 in filter V on MJD  58073.090
17.90± 0.07bM31-004341.84 in filter B on MJD  58073.090
--------
58077.08 17.46± 0.08bM31-004341.84 in filter V on MJD  58077.080
-------- 16.74± 0.07bM31-004341.84 in filter I on MJD  58077.080
58098.07 17.36± 0.06bM31-004341.84 in filter V on MJD  58098.070
17.86± 0.08bM31-004341.84 in filter B on MJD  58098.070
--------
58103.08 17.44± 0.05bM31-004341.84 in filter V on MJD  58103.080
-------- 16.62± 0.07bM31-004341.84 in filter I on MJD  58103.080
58312.26 17.55± 0.06bM31-004341.84 in filter V on MJD  58312.260
18.04± 0.08bM31-004341.84 in filter B on MJD  58312.260
17.05± 0.06bM31-004341.84 in filter R on MJD  58312.260
----
58316.24 17.49± 0.06bM31-004341.84 in filter V on MJD  58316.240
-------- 16.62± 0.06bM31-004341.84 in filter I on MJD  58316.240
58339.26 17.51± 0.06bM31-004341.84 in filter V on MJD  58339.260
-------- 16.67± 0.07bM31-004341.84 in filter I on MJD  58339.260
58342.26 17.50± 0.04bM31-004341.84 in filter V on MJD  58342.260
17.90± 0.07bM31-004341.84 in filter B on MJD  58342.260
--------
58366.11 17.45± 0.04bM31-004341.84 in filter V on MJD  58366.110
17.85± 0.07bM31-004341.84 in filter B on MJD  58366.110
--------
58375.09 17.44± 0.04bM31-004341.84 in filter V on MJD  58375.090
---- 17.01± 0.04bM31-004341.84 in filter R on MJD  58375.090
----
58403.06 17.34± 0.03bM31-004341.84 in filter V on MJD  58403.060
-------- 16.56± 0.05bM31-004341.84 in filter I on MJD  58403.060
58420.01 17.33± 0.06bM31-004341.84 in filter V on MJD  58420.010
17.74± 0.08bM31-004341.84 in filter B on MJD  58420.010
--------
58436.04 17.36± 0.04bM31-004341.84 in filter V on MJD  58436.040
17.72± 0.06bM31-004341.84 in filter B on MJD  58436.040
16.83± 0.04bM31-004341.84 in filter R on MJD  58436.040
----
58671.35 17.39± 0.03AbM31-004341.84 in filter V on MJD  58671.350
M31-004341.84 in filter V on MJD  58671.350
17.83± 0.04bM31-004341.84 in filter B on MJD  58671.350
16.94± 0.04bM31-004341.84 in filter R on MJD  58671.350
----
58695.41 17.54± 0.03bM31-004341.84 in filter V on MJD  58695.410
---- 17.01± 0.04bM31-004341.84 in filter R on MJD  58695.410
----
58750.11 17.36± 0.03bM31-004341.84 in filter V on MJD  58750.110
-------- 16.54± 0.05bM31-004341.84 in filter I on MJD  58750.110
58779.03 17.36± 0.03bM31-004341.84 in filter V on MJD  58779.030
17.80± 0.03bM31-004341.84 in filter B on MJD  58779.030
--------
58812.16 17.41± 0.03bM31-004341.84 in filter V on MJD  58812.160
---- 16.91± 0.03bM31-004341.84 in filter R on MJD  58812.160
----
59000.37 17.44± 0.06bM31-004341.84 in filter V on MJD  59000.370
---- 17.00± 0.05bM31-004341.84 in filter R on MJD  59000.370
----
59055.29 17.42± 0.06bM31-004341.84 in filter V on MJD  59055.290
17.90± 0.07bM31-004341.84 in filter B on MJD  59055.290
--------
59077.25 17.45± 0.07bM31-004341.84 in filter V on MJD  59077.250
---- 16.97± 0.05bM31-004341.84 in filter R on MJD  59077.250
16.65± 0.06bM31-004341.84 in filter I on MJD  59077.250
59131.11 17.44± 0.05bM31-004341.84 in filter V on MJD  59131.110
17.95± 0.06bM31-004341.84 in filter B on MJD  59131.110
--------
59166.14 17.40± 0.05bM31-004341.84 in filter V on MJD  59166.140
-------- 16.66± 0.06bM31-004341.84 in filter I on MJD  59166.140
59194.12 17.46± 0.04bM31-004341.84 in filter V on MJD  59194.120
---- 16.96± 0.04bM31-004341.84 in filter R on MJD  59194.120
----
59376.38 17.46± 0.07bM31-004341.84 in filter V on MJD  59376.380
17.95± 0.07bM31-004341.84 in filter B on MJD  59376.380
--------
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 M31-004341.84Plot of color for M31-004341.84

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 [0.32 mag]B [0.27 mag]R [0.31 mag]
B [0.32 mag]0.77 (21)
R [0.31 mag]0.69 (17)0.76 (9)
I [0.25 mag]0.52 (16)0.65 (3)-.-- (2)

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 M31-004341.84

Plot to assess correlation between bands for M31-004341.84

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)
1.83 | 0.90
R
(I|R)
1.94 | 0.892.08 | 0.06
I
(I|R)
1.20 | 1.45--- | --- --- | ----

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