BSM_NM transformation coefficients

Affiliation
American Association of Variable Star Observers (AAVSO)
Thu, 08/18/2016 - 12:11

Here are the transformation coefficients for BSM_NM, from 5 photometric nights using Landolt standards at the beginning of 2016.

Tb_bv = 0.0744

Tv_bv = 0.0075

Tr_vi = 0.0202

Ti_vi = -0.0168

Tbv = 0.9548

Tvi = 1.0157

Arne

Affiliation
American Association of Variable Star Observers (AAVSO)
Revised Coeffs

Revised Transformation Coeffs generated on 190227 from images from 180224.

description= TG - Version TG_V7.3 beta 5, Telescope= BSM_NM, Time created (UT) = 2019_03_01_02:04:48
[Coefficients]
Tbv= 1.004
Tb_bv= -0.050
Tv_bv= 0.003
Tvr= 1.016
Tv_vr= 0.004
Tr_vr= -0.007
Tri= 1.095
Tr_ri= -0.031
Ti_ri= -0.035
Tvi= 1.043
Tv_vi= 0.016
Ti_vi= -0.031
Tr_vi= -0.017
[Error]
Tbv= 0.030
Tb_bv= 0.074
Tv_bv= 0.044
Tvr= 0.048
Tv_vr= 0.096
Tr_vr= 0.104
Tri= 0.052
Tr_ri= 0.140
Ti_ri= 0.063
Tvi= 0.028
Tv_vi= 0.036
Ti_vi= 0.042
Tr_vi= 0.070
[R Squared Values]
Tbv= 0.925
Tb_bv= 0.015
Tv_bv= 0.011
Tvr= 0.858
Tv_vr= 0.015
Tr_vr= 0.011
Tri= 0.876
Tr_ri= 0.012
Ti_ri= 0.006
Tvi= 0.959
Tv_vi= 0.018
Ti_vi= 0.010
Tr_vi= 0.013

Affiliation
American Association of Variable Star Observers (AAVSO)
BSM_NM2 New Coefficients

Transformation coefficients for new NM2 system including an E180 scope and ASI183 CMOS camera.

[Setup]
description= TG - Version TG_V7.4, Telescope= BSM_NM2, Time created (UT) = 2020_04_13_15:56:58
[Coefficients]
Tbv= 1.057
Tb_bv= -0.002
Tv_bv= -0.032
Tvr= 1.035
Tv_vr= -0.050
Tr_vr= -0.110
Tri= 0.941
Tr_ri= -0.117
Ti_ri= -0.054
Tvi= 0.990
Tv_vi= -0.029
Ti_vi= -0.014
Tr_vi= -0.057
[Error]
Tbv= 0.029
Tb_bv= 0.043
Tv_bv= 0.036
Tvr= 0.025
Tv_vr= 0.070
Tr_vr= 0.068
Tri= 0.049
Tr_ri= 0.074
Ti_ri= 0.099
Tvi= 0.024
Tv_vi= 0.036
Ti_vi= 0.039
Tr_vi= 0.035
[R Squared Values]
Tbv= 0.950
Tb_bv= 0.000
Tv_bv= 0.008
Tvr= 0.938
Tv_vr= 0.005
Tr_vr= 0.022
Tri= 0.889
Tr_ri= 0.022
Ti_ri= 0.007
Tvi= 0.966
Tv_vi= 0.007
Ti_vi= 0.002
Tr_vi= 0.024

Affiliation
American Association of Variable Star Observers (AAVSO)
BSM_NM2 Transformation Coeffs 210408

BSM_NM2 New Coefficients - Updated 210408

Transformation coefficients for NM2 system including an E180 scope and ASI183 CMOS camera. Coeffs updated in VPhot.

SR filter was used rather than a Cousins R filter for these coefficients.

[Setup]
description= TG - Version 6.6, Telescope= BSM_NM2, Time created (UT) = 2021_04_09_00:24:01
[Coefficients]
Tbv= 1.065
Tb_bv= -0.001
Tbr= 1.091
Tb_br= -0.004
Tb_bi= -0.004
Tbi= 0.998
Tv_bv= -0.078
Tvr= 1.114
Tv_vr= -0.167
Tr_vr= -0.264
Tri= 0.836
Tr_ri= -0.301
Ti_ri= -0.034
Tvi= 0.948
Tv_vi= -0.093
Ti_vi= -0.008
Tr_vi= -0.141
[Error]
Tbv= 0.025
Tb_bv= 0.029
Tbr= 0.021
Tb_br= 0.020
Tb_bi= 0.015
Tbi= 0.019
Tv_bv= 0.032
Tvr= 0.063
Tv_vr= 0.068
Tr_vr= 0.072
Tri= 0.060
Tr_ri= 0.083
Ti_ri= 0.124
Tvi= 0.043
Tv_vi= 0.035
Ti_vi= 0.057
Tr_vi= 0.040
[R Squared Values]
Tbv= 0.970
Tb_bv= 0.000
Tbr= 0.976
Tb_br= 0.001
Tb_bi= 0.001
Tbi= 0.977
Tv_bv= 0.081
Tvr= 0.842
Tv_vr= 0.090
Tr_vr= 0.178
Tri= 0.786
Tr_ri= 0.181
Ti_ri= 0.003
Tvi= 0.894
Tv_vi= 0.100
Ti_vi= 0.002
Tr_vi= 0.159

Affiliation
American Association of Variable Star Observers (AAVSO)
BSM NM2 Transformation Coefficients 210430 with Cousins Rc

Attached coeffs were generated on 210430 for NM2 using E180 scope and ASI183 camera. A Cousins R filter was used for these coeffs. They are different than those shown above using SR filter. Coeffs updated in VPhot.

[Setup]
description= TG - Version 6.6, Telescope= BSM_NM2, Time created (UT) = 2021_04_30_19:14:23
[Coefficients]
Tbv= 1.039
Tb_bv= 0.012
Tbr= 1.028
Tb_br= 0.006
Tb_bi= -0.000
Tbi= 1.015
Tv_bv= -0.033
Tvr= 1.001
Tv_vr= -0.085
Tr_vr= -0.072
Tri= 0.974
Tr_ri= -0.100
Ti_ri= -0.104
Tvi= 0.989
Tv_vi= -0.049
Ti_vi= -0.046
Tr_vi= -0.048
[Error]
Tbv= 0.015
Tb_bv= 0.025
Tbr= 0.010
Tb_br= 0.017
Tb_bi= 0.011
Tbi= 0.008
Tv_bv= 0.018
Tvr= 0.019
Tv_vr= 0.034
Tr_vr= 0.033
Tri= 0.023
Tr_ri= 0.036
Ti_ri= 0.034
Tvi= 0.013
Tv_vi= 0.018
Ti_vi= 0.016
Tr_vi= 0.018
[R Squared Values]
Tbv= 0.988
Tb_bv= 0.013
Tbr= 0.996
Tb_br= 0.011
Tb_bi= 0.004
Tbi= 0.997
Tv_bv= 0.050
Tvr= 0.977
Tv_vr= 0.083
Tr_vr= 0.073
Tri= 0.982
Tr_ri= 0.102
Ti_ri= 0.203
Tvi= 0.992
Tv_vi= 0.095
Ti_vi= 0.200
Tr_vi= 0.099