Color composite thumbnail image of M31-004320.97M31-004320.97 (J004320.97+414039.6)



Target Notes

Color composite thumbnail image of M31-004320.97

Classification: B[e]sg

No blend concerns

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 19.25± 0.23TM31-004320.97 in filter V on MJD  56142.310
------------
56267.16-------- 18.47± 0.05TM31-004320.97 in filter R on MJD  56267.160
----
56490.35 19.27± 0.08-M31-004320.97 in filter V on MJD  56490.350
19.79± 0.09-M31-004320.97 in filter B on MJD  56490.350
--------
56536.22 19.23± 0.13-M31-004320.97 in filter V on MJD  56536.220
---- 18.48± 0.06-M31-004320.97 in filter R on MJD  56536.220
----
56923.11 19.22± 0.08-M31-004320.97 in filter V on MJD  56923.110
19.73± 0.12-M31-004320.97 in filter B on MJD  56923.110
18.46± 0.06-M31-004320.97 in filter R on MJD  56923.110
----
57227.36 19.28± 0.07-M31-004320.97 in filter V on MJD  57227.360
19.70± 0.08-M31-004320.97 in filter B on MJD  57227.360
--------
57314.12 19.19± 0.07-M31-004320.97 in filter V on MJD  57314.120
-------- 18.28± 0.09-M31-004320.97 in filter I on MJD  57314.120
57633.25 19.28± 0.11-M31-004320.97 in filter V on MJD  57633.250
19.85± 0.11-M31-004320.97 in filter B on MJD  57633.250
18.52± 0.05-M31-004320.97 in filter R on MJD  57633.250
----
57635.36 19.28± 0.07-M31-004320.97 in filter V on MJD  57635.360
-------- 18.23± 0.07-M31-004320.97 in filter I on MJD  57635.360
57958.35 19.24± 0.08-M31-004320.97 in filter V on MJD  57958.350
---- 18.43± 0.05-M31-004320.97 in filter R on MJD  57958.350
18.02± 0.06-M31-004320.97 in filter I on MJD  57958.350
57963.38 19.48± 0.08-M31-004320.97 in filter V on MJD  57963.380
19.84± 0.12-M31-004320.97 in filter B on MJD  57963.380
--------
57988.34 19.29± 0.07-M31-004320.97 in filter V on MJD  57988.340
19.86± 0.09-M31-004320.97 in filter B on MJD  57988.340
18.59± 0.05-M31-004320.97 in filter R on MJD  57988.340
18.21± 0.07-M31-004320.97 in filter I on MJD  57988.340
58067.17 19.40± 0.07-M31-004320.97 in filter V on MJD  58067.170
-------- 18.34± 0.08-M31-004320.97 in filter I on MJD  58067.170
58077.11 19.26± 0.11-M31-004320.97 in filter V on MJD  58077.110
19.93± 0.20-M31-004320.97 in filter B on MJD  58077.110
18.66± 0.09-M31-004320.97 in filter R on MJD  58077.110
18.31± 0.13-M31-004320.97 in filter I on MJD  58077.110
58312.35 19.26± 0.08-M31-004320.97 in filter V on MJD  58312.350
19.68± 0.09-M31-004320.97 in filter B on MJD  58312.350
--------
58339.35 19.37± 0.07-M31-004320.97 in filter V on MJD  58339.350
19.82± 0.08-M31-004320.97 in filter B on MJD  58339.350
18.43± 0.04-M31-004320.97 in filter R on MJD  58339.350
----
58341.28 19.29± 0.09-M31-004320.97 in filter V on MJD  58341.280
---- 18.44± 0.06-M31-004320.97 in filter R on MJD  58341.280
18.25± 0.08-M31-004320.97 in filter I on MJD  58341.280
58342.31 19.36± 0.10-M31-004320.97 in filter V on MJD  58342.310
-------- 18.08± 0.08-M31-004320.97 in filter I on MJD  58342.310
M31-004320.97 in filter I on MJD  58342.310
58366.16 19.32± 0.08-M31-004320.97 in filter V on MJD  58366.160
19.59± 0.10-M31-004320.97 in filter B on MJD  58366.160
--------
58372.15 19.39± 0.09-M31-004320.97 in filter V on MJD  58372.150
-------- 18.45± 0.11-M31-004320.97 in filter I on MJD  58372.150
58433.11 19.20± 0.07-M31-004320.97 in filter V on MJD  58433.110
19.61± 0.13-M31-004320.97 in filter B on MJD  58433.110
--------
58671.33 19.39± 0.11-M31-004320.97 in filter V on MJD  58671.330
19.55± 0.17-M31-004320.97 in filter B on MJD  58671.330
--------
58696.25 19.24± 0.09-M31-004320.97 in filter V on MJD  58696.250
20.03± 0.12-M31-004320.97 in filter B on MJD  58696.250
18.37± 0.05-M31-004320.97 in filter R on MJD  58696.250
18.06± 0.06-M31-004320.97 in filter I on MJD  58696.250
58757.10 19.29± 0.07-M31-004320.97 in filter V on MJD  58757.100
---- 18.46± 0.04-M31-004320.97 in filter R on MJD  58757.100
----
58784.07 19.26± 0.06-M31-004320.97 in filter V on MJD  58784.070
19.83± 0.09-M31-004320.97 in filter B on MJD  58784.070
--------
58812.12 19.37± 0.06-M31-004320.97 in filter V on MJD  58812.120
-------- 18.07± 0.05-M31-004320.97 in filter I on MJD  58812.120
59019.35 19.34± 0.09-M31-004320.97 in filter V on MJD  59019.350
20.12± 0.17-M31-004320.97 in filter B on MJD  59019.350
--------
59059.34 19.24± 0.06-M31-004320.97 in filter V on MJD  59059.340
---- 18.51± 0.04-M31-004320.97 in filter R on MJD  59059.340
----
59077.17 19.39± 0.12-M31-004320.97 in filter V on MJD  59077.170
-------- 18.22± 0.09-M31-004320.97 in filter I on MJD  59077.170
59082.22 19.26± 0.07-M31-004320.97 in filter V on MJD  59082.220
19.95± 0.11-M31-004320.97 in filter B on MJD  59082.220
--------
59136.09 19.26± 0.10-M31-004320.97 in filter V on MJD  59136.090
19.80± 0.13-M31-004320.97 in filter B on MJD  59136.090
18.57± 0.06-M31-004320.97 in filter R on MJD  59136.090
----
59166.10 19.33± 0.07-M31-004320.97 in filter V on MJD  59166.100
-------- 17.99± 0.06-M31-004320.97 in filter I on MJD  59166.100
59379.36 19.40± 0.16-M31-004320.97 in filter V on MJD  59379.360
---- 18.61± 0.07-M31-004320.97 in filter R on MJD  59379.360
----
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 M31-004320.97Plot of color for M31-004320.97

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 [0.57 mag]B [0.29 mag]R [0.29 mag]
B [0.57 mag]0.00 (17)
R [0.29 mag]0.05 (13)0.01 (7)
I [0.46 mag]0.03 (13)0.45 (3)0.59 (5)

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 M31-004320.97

Plot to assess correlation between bands for M31-004320.97

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)
0.07 | 1.60
R
(I|R)
0.03 | 0.36-0.97 | 0.02
I
(I|R)
0.21 | 0.44--- | --- 1.97 | 1.18

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