ZC600 600/2400
#Observatory>Hlohovec
#Observer>DPV + Karol Petrík
#Telescope>ZC600
#Instrument>Atik 383L
#Filter/Exposure>B 10s
#Target>V471 Tau
#Position>03:50:24.97;+17:14:47.4
#MainComp>03:50:23.14;+17:28:29.4;B=8.15;V=7.50
#Source>Hipparcos
#Time system>JD heliocentric
#Magnitude system>DIF
#Reduction process>Ensemble photometry with IRAF
#Comment>

VNT RL 1000/9000
#Observatory>Kolonica
#Observer>DPV
#Telescope>VNT
#Instrument>FLI
#Filter/Exposure>B 10s
#Target>V471 Tau
#Position>03:50:24.97;+17:14:47.4
#MainComp>03:49:56.26;+17:07:53.8;B=10.62;V=9.43
#Source>Tycho-2
#Time system>JD geocentric
#Magnitude system>DIF
#Reduction process>Ensemble photometry with CoLiTecVS & MaximDL
#Comment>


----- EBFit result: -----
TminGJD = 2459491.49447
Error (1 sigma): +0.00005/-0.00005 (Bootstrapping), +0.00019/-0.00031 (Prayer bead), +0.00026/-0.00026 (LSM)
Error (95% CI): +0.00010/-0.00009 (Bootstrapping), +0.00031/-0.00042 (Prayer bead)
LSM: chi^2 = 66.8, n_freedom = 940

Ziga CDK20
#Observatory>Kolonica
#Observer>Medulka
#Telescope>Ziga
#Instrument>MII G4-16000
#Filter>B
#Exposure>10.0
#Target>V471 Tau
#Position>03:50:24.97;+17:14:47.4
#MainComp>03:49:56.26;+17:07:53.8;B=10.62;V=9.43
#Source>Tycho-2
#Time system>JD geocentric
#Magnitude system>DIF
#Reduction process>Ensemble photometry with CoLiTecVS and MCV
#Comment>fullframe


----- EBFit result: -----
TminGJD = 2458372.51461
Error (1 sigma): +0.00011/-0.00022 (Bootstrapping), +0.00025/-0.00011 (Prayer bead), +0.00005/-0.00005 (LSM)
Error (95% CI): +0.00023/-0.00046 (Bootstrapping), +0.00040/-0.00017 (Prayer bead)
LSM: chi^2 = 1602.9, n_freedom = 181

Ziga CDK20
#Observatory>Kolonica
#Observer>DPV
#Telescope>Ziga
#Instrument>MII G4-16000
#Filter>B
#Exposure>10.0
#Target>V471 Tau
#Position>03:50:24.97;+17:14:47.4
#MainComp>03:49:56.26;+17:07:53.8;B=10.62;V=9.43
#Source>Tycho-2
#Time system>JD geocentric
#Magnitude system>DIF
#Reduction process>Ensemble photometry with CoLiTecVS and MCV
#Comment>fullframe


----- EBFit result: -----
TminGJD = 2458371.47213
Error (1 sigma): +0.00009/-0.00009 (Bootstrapping), +0.00020/-0.00009 (Prayer bead), +0.00003/-0.00003 (LSM)
Error (95% CI): +0.00018/-0.00024 (Bootstrapping), +0.00033/-0.00144 (Prayer bead)
LSM: chi^2 = 2284.4, n_freedom = 322

VNT RL 1000/9000
CCD+B; exp 10s; VNT
VNT 1000/9000 + FLI PL1001E in Cassegrain focus + DPV
Differential photometry with C-Munipack and MCV, Comparison = TYC1252-00770-1, V=9.43, B-V=1.19;
JD geocentric, V-C magnitudes

Ziga CDK20
CCD+B; exp 10s; Ziga binning 2x2 subframe 1024x1024
Ziga 508/3454 + MII G4-16000 + DPV
Images calibrated with OLDAS, Differential photometry with C-Munipack and MCV, Comparison = TYC1252-00770-1, V=9.43, B-V=1.19;
JD geocentric, V-C magnitudes

Ziga CDK20
CCD+B; exp 10s; Ziga binning 2x2 subframe 1024x1024
Ziga 508/3454 + MII G4-16000 + DPV
Differential photometry with C-Munipack and MCV, Comparison = TYC1252-00770-1, V=9.43, B-V=1.19;
JD geocentric, V-C magnitudes

Refraktor 90/500 + Canon 450D
exp 60s; Differential photometry with C-Munipack

Refraktor 90/500 + Canon 450D
exp 60s; Differential photometry with C-Munipack

----- EBFit result: -----
Tmin = 2456977.30329
Error (1 sigma): +0.00132/-0.00130 (Bootstrapping), +0.00018/-0.00028 (Prayer bead), +0.00112/-0.00112 (LSM)
Error (95% CI): +0.00260/-0.00257 (Bootstrapping), +0.00082/-0.00051 (Prayer bead)
LSM: chi^2 = 33.0, n_freedom = 28

VNT RL 1000/9000
CCD+B; exp 10s; VNT
VNT 1000/9000 + FLI PL1001E in Cassegrain focus + DPV
Differential photometry with C-Munipack and MCV, Comparison = TYC1252-00770-1, V=9.43, B-V=1.19;
JD geocentric, V-C magnitudes

VNT RL 1000/9000
CCD+B; exp 10s; VNT
VNT 1000/9000 + FLI PL1001E in Cassegrain focus + DPV
Differential photometry with Maxim DL and MCV, Comparison = TYC1252-00770-1, V=9.43, B-V=1.19;
JD geocentric, V-C magnitudes

VNT RL 1000/9000
CCD+B; exp 10s; VNT
VNT 1000/9000 + FLI PL1001E in Cassegrain focus + DPV
Differential photometry with C-Munipack and MCV, Comparison = TYC1252-00770-1, V=9.43, B-V=1.19;
JD geocentric, V-C magnitudes

VNT RL 1000/9000
CCD+B; exp 10s; VNT
VNT 1000/9000 + FLI PL1001E in Cassegrain focus + DPV
Differential photometry with C-Munipack and MCV, Comparison = TYC1252-00770-1, V=9.43, B-V=1.19;
JD geocentric, V-C magnitudes

VNT RL 1000/9000
CCD+B; exp 10s;
VNT 1000/9000 + FLI PL1001E in Cassegrain focus + DPV
Differential photometry with C-Munipack and MCV, Comparison = TYC1252-00770-1, V=9.43, B-V=1.19;
JD geocentric, V-C magnitudes

VNT photometer
Instrument: VNT 1000/9000; two channel photoelectric photometer


2. channel - var = V471 Tau


1. channel - comp = HD 26040 V=7.50, B=8.14 (Hipparcos)


autoguiding on pointer telescope


Diafragma No: 4 (45\")


Star/Sky aperture= 1.3, 1.3


calibration on comparison star


ka=0.55


Exp: 2s


Filter: B


Serie: 10xK, 120xB, 3xBsky,


JD geocentric; differencial magnitudes untransformed

VNT photometer
Instrument: VNT 1000/9000; two channel photoelectric photometer


2. channel - var = V471 Tau


1. channel - comp = HD 26040 V=7.50, B=8.14 (Hipparcos)


autoguiding on pointer telescope


Diafragma No: 4 (45\")


Star/Sky aperture= 1.3, 1.3


calibration on comparison star


ka=0.50


Exp: 1s


Filter: B


Serie: 10xK, 120xB, 3xBsky,


JD geocentric; differencial magnitudes untransformed

VNT RL 1000/9000
CCD+B; exp 30s, clouds


VNT 1000/9000 + FLI PL1001E in Cassegrain focus + DPV





Comp: TYC1252-00770-1, V=9.43, B-V=1.19


JD geocentric, V-C magnitudes

VNT RL 1000/9000
CCD+B; exp 30s, 10s during the ingres and egres of the eclipse

VNT 1000/9000 + FLI PL1001E in Cassegrain focus + DPV



Comp: TYC1252-00770-1, V=9.43, B-V=1.19

JD geocentric, V-C magnitudes

VNT RL 1000/9000
CCD+B; exp 10s

VNT 1000/9000 + FLI PL1001E in Cassegrain focus + DPV



Comp: TYC1252-00770-1, V=9.43, B-V=1.19

JD geocentric, V-C magnitudes

VNT RL 1000/9000
CCD+B; exp 10s

VNT 1000/9000 + FLI PL1001E in Cassegrain focus + DPV



Comp: TYC1252-00770-1, V=9.43, B-V=1.19

JD geocentric, V-C magnitudes

Pointer RL 300/2400
CCD+B; exp 10s, out of eclipse 30s

Pointer 300/2400 + FLI PL1001E + DPV



Comp: HD 24040, V=7.50, B-V=0.65

JD geocentric, V-C magnitudes

VNT RL 1000/9000
CCD+B; exp 10s

VNT 1000/9000 + FLI PL1001E in Cassegrain focus + DPV



Comp: TYC1252-00770-1, V=9.43, B-V=1.19

JD geocentric, V-C magnitudes

VNT RL 1000/9000
CCD+B; exp 10s

VNT 1000/9000 + FLI PL1001E in Cassegrain focus + DPV



Comp: TYC1252-00770-1, V=9.43, B-V=1.19

JD geocentric, V-C magnitudes

VNT RL 1000/9000
CCD+B; exp 10s

VNT 1000/9000 + FLI PL1001E in Cassegrain focus + DPV



Comp: TYC1252-00770-1, V=9.43, B-V=1.19

JD geocentric, V-C magnitudes

Pointer RL 300/2400
CCD+B; exp 30s

Pointer 300/2400mm + SBIG ST9-XE + DPV