Nikon D800 + Tamron SP 70-200 mm f/2.8 @70 mm + EQ3-2
G channel used for photometry; 30 s exposure

Nikon D800 + Tamron SP 70-200 mm f/2.8 @70 mm + EQ3-2
G channel used for photometry; 30 s exposure

Vixen 20cm VMC200L

----- EBFit result: -----
Tmin = 2460377.32660
Error (1 sigma): +0.00017/-0.00017 (Bootstrapping), +0.00003/-0.00003 (Prayer bead), +0.00008/-0.00008 (LSM)
Error (95% CI): +0.00033/-0.00032 (Bootstrapping), +0.00004/-0.00005 (Prayer bead)
LSM: chi^2 = 1332.1, n_freedom = 355

MEGREZ 88 FD 88/498 + MII G2-8300
CCD+I,exp.20s., comp. HD127807.

MEGREZ 88 FD 88/498 + MII G2-8300
CCD+R,exp.16 s., comp. HD127807.

MEGREZ 88 FD 88/498 + MII G2-8300
CCD+V,exp.30s., comp. HD127807.

MEGREZ 88 FD 88/498 + MII G2-8300
CCD+B,exp.40s., comp. UCAC4-705-052735.

MEGREZ 88 FD 88/498 + MII G2-8300
CCD+R, exp.20 s., comp.
HD127807,2x2.

MEGREZ 88 FD 88/498 + MII G2-8300
CCD+V, exp.30 s., comp.
HD127807,2x2.

MEGREZ 88 FD 88/498 + MII G2-8300
CCD+B, exp.40 s., comp.
HD127807,2x2.

REF 120/600 Archo + Orion 3G CCD + 0.5x Foc. reducer
----- EBFit result: -----
Tmin = 2459345.38307
Error (1 sigma): +0.00016/-0.00015 (Bootstrapping), +0.00014/-0.00015 (Prayer bead), +0.00008/-0.00008 (LSM)
Error (95% CI): +0.00029/-0.00029 (Bootstrapping), +0.00026/-0.00019 (Prayer bead)
LSM: chi^2 = 1128.5, n_freedom = 384

REF 120/600 + Orion 3G CCD + 0.5x reducer
----- EBFit result: -----
Tmin = 2459345.38310
Error (1 sigma): +0.00015/-0.00013 (Bootstrapping), +0.00015/-0.00014 (Prayer bead), +0.00008/-0.00008 (LSM)
Error (95% CI): +0.00029/-0.00026 (Bootstrapping), +0.00027/-0.00019 (Prayer bead)
LSM: chi^2 = 1069.5, n_freedom = 377

EQ6 + 0.25-m f/4 + CCD ST7 + Rc
# NAME EF Boo
# VAR 14:32:30.54 +50:49:40.7 2448500.302 0.420512 9.43-10.00Hp EW (VSX 20200417)
# OBS Martin Lehky (Hradec Kralove CZ; 0.25-m f/4 reflector + CCD ST7)
# FLT Rc
# RED CMunipack 1.1.26 + Peranso 2.50 + SPHE/VSES Upload Form (2012) var.astro.cz
# NOTE 15/16 IV 2020; Rc_450_20s (353/184); 3.2h; minimum S
# NOTE 2458955.35371 +/- 0.00005; 20200415 20:29:21 (UT) GEO
# COND fine clear weather

----- EBFit result: -----
Tmin = 2458955.35371
Error (1 sigma): +0.00008/-0.00008 (Bootstrapping), +0.00024/-0.00025 (Prayer bead), +0.00005/-0.00005 (LSM)
Error (95% CI): +0.00015/-0.00016 (Bootstrapping), +0.00049/-0.00036 (Prayer bead)
LSM: chi^2 = 1569.2, n_freedom = 348

EQ6 + 0.25-m f/4 + CCD ST7 + Rc
# NAME EF Boo
# VAR 14:32:30.54 +50:49:40.7 2448500.302 0.420512 9.43-10.00Hp EW (VSX 20200417)
# OBS Martin Lehky (Hradec Kralove CZ; 0.25-m f/4 reflector + CCD ST7)
# FLT Rc
# RED CMunipack 1.1.26 + Peranso 2.50 + SPHE/VSES Upload Form (2012) var.astro.cz
# NOTE 15/16 IV 2020; Rc_450_20s (353/184); 3.2h; minimum S
# NOTE 2458955.35371 +/- 0.00005; 20200415 20:29:21 (UT) GEO
# COND fine clear weather

Skywatcher REF 102/600 + Canon 1000D
Canon Bayer filter G

Jasno, k ránu přechody oblačnosti.

V2_C9_90.200_V_cca22°C

----- EBFit result: -----
Tmin = 2458629.45688
Error (1 sigma): +0.00011/-0.00012 (Bootstrapping), +0.00003/-0.00004 (Prayer bead), +0.00013/-0.00013 (LSM)
Error (95% CI): +0.00024/-0.00023 (Bootstrapping), +0.00008/-0.00006 (Prayer bead)
LSM: chi^2 = 65.7, n_freedom = 71

Skywatcher REF 102/600 + Canon 1000D
Canon Bayer filter G

Jasno, k ránu přechody oblačnosti.

V2_C9_90.200_V_cca22°C

Sonnar LNS 45/180 + Canon 600D
Nezachycen konec minima. Příchod oblačnosti.
60s / ISO 1600

EQ6 + 0.25-m f/4 + CCD ST7 + Rc
# NAME EF Boo
# VAR 14:32:30.54 +50:49:40.7 2448500.302 0.420512 9.43-10.00Hp EW (VSX 20180704)
# OBS Martin Lehky (Hradec Kralove CZ; 0.25-m f/4 reflector + CCD ST7)
# FLT Rc
# RED CMunipack 1.1.26 + Peranso 2.50 + SPHE/VSES Upload Form (2012) var.astro.cz
# NOTE 02/03 VII 2018; Rc_313_20s (297/179); 2.3h; minimum P
# NOTE 2458302.50855 +/- 0.00006; 20180703 00:12:19 (UT) GEO
# COND fine clear weather

----- EBFit result: -----
Tmin = 2458302.50856
Error (1 sigma): +0.00012/-0.00012 (Bootstrapping), +0.00015/-0.00012 (Prayer bead), +0.00006/-0.00006 (LSM)
Error (95% CI): +0.00023/-0.00020 (Bootstrapping), +0.00023/-0.00015 (Prayer bead)
LSM: chi^2 = 851.4, n_freedom = 253

EQ6 + 0.25-m f/4 + CCD ST7 + Rc
# NAME EF Boo
# VAR 14:32:30.54 +50:49:40.7 2448500.302 0.420512 9.43-10.00Hp EW (VSX 20180704)
# OBS Martin Lehky (Hradec Kralove CZ; 0.25-m f/4 reflector + CCD ST7)
# FLT Rc
# RED CMunipack 1.1.26 + Peranso 2.50 + SPHE/VSES Upload Form (2012) var.astro.cz
# NOTE 02/03 VII 2018; Rc_313_20s (297/179); 2.3h; minimum P
# NOTE 2458302.50855 +/- 0.00006; 20180703 00:12:19 (UT) GEO
# COND fine clear weather

EQ6 + 0.25-m f/4 + CCD ST7 + C
# NAME EF Boo
# VAR 14:32:30.54 +50:49:40.7 2448500.302 0.420512 9.43-10.00Hp EW (VSX 20170304)
# OBS Martin Lehky (Hradec Kralove CZ; 0.25-m f/4 reflector + CCD ST7)
# FLT C
# RED CMunipack 1.1.26 + Peranso 2.50 + SPHE/VSES Upload Form (2012) var.astro.cz
# NOTE 13/14 II 2017; C_490_20s (478/256); 3.6h; minimum S
# NOTE 2457798.51825 +/- 0.00004; 20170214 00:26:17 (UT) GEO
# COND clear weather

----- EBFit result: -----
Tmin = 2457798.51825
Error (1 sigma): +0.00007/-0.00007 (Bootstrapping), +0.00006/-0.00010 (Prayer bead), +0.00004/-0.00004 (LSM)
Error (95% CI): +0.00014/-0.00014 (Bootstrapping), +0.00019/-0.00014 (Prayer bead)
LSM: chi^2 = 2210.4, n_freedom = 473

EQ6 + 0.25-m f/4 + CCD ST7 + C
# NAME EF Boo
# VAR 14:32:30.54 +50:49:40.7 2448500.302 0.420512 9.43-10.00Hp EW (VSX 20170304)
# OBS Martin Lehky (Hradec Kralove CZ; 0.25-m f/4 reflector + CCD ST7)
# FLT C
# RED CMunipack 1.1.26 + Peranso 2.50 + SPHE/VSES Upload Form (2012) var.astro.cz
# NOTE 13/14 II 2017; C_490_20s (478/256); 3.6h; minimum S
# NOTE 2457798.51825 +/- 0.00004; 20170214 00:26:17 (UT) GEO
# COND clear weather

EQ6 + 0.25-m f/4 + CCD ST7 + R
# NAME EF Boo
# VAR 14:32:30.54 +50:49:40.7 2448500.3020 0.420512 9.43-10.00Hp EW (VSX 20110211)
# OBS Martin Lehky (Hradec Kralove CZ; 0.25-m f/4 reflector + CCD ST7)
# FLT Rc
# RED CMunipack 1.1.26 + Peranso 2.50 + SPHE/VSES Upload Form (2012) var.astro.cz
# NOTE 15/16 IV 2015; R_350_20s (281/177); 3.1h; minimum P
# NOTE 2457128.42576 +/- 0.00005; 20150415 22:13:06 (UT) GEO
# COND clear weather

EQ6 + 0.25-m f/4 + CCD ST7 + R
# NAME EF Boo
# VAR 14:32:30.54 +50:49:40.7 2448500.3020 0.420512 9.43-10.00Hp EW (VSX 20110211)
# OBS Martin Lehky (Hradec Kralove CZ; 0.25-m f/4 reflector + CCD ST7)
# FLT Rc
# RED CMunipack 1.1.26 + Peranso 2.50 + SPHE/VSES Upload Form (2012) var.astro.cz
# NOTE 15/16 IV 2015; R_350_20s (281/177); 3.1h; minimum P
# NOTE 2457128.42576 +/- 0.00005; 20150415 22:13:06 (UT) GEO
# COND clear weather

----- EBFit result: -----
Tmin = 2457128.42566
Error (1 sigma): +0.00013/-0.00011 (Bootstrapping), +0.00051/-0.00040 (Prayer bead), +0.00005/-0.00005 (LSM)
Error (95% CI): +0.00024/-0.00020 (Bootstrapping), +0.00085/-0.00080 (Prayer bead)
LSM: chi^2 = 1435.6, n_freedom = 276

REF 90/500 + MII G1-300
CCD+Clear; exp 30s; Mean Comp HIP 71043; No binning; ccd photometry with C-Munipack

----- EBFit result: -----
TminGJD = 2457098.35871
Error (1 sigma): +0.00013/-0.00013 (Bootstrapping), +0.00004/-0.00003 (Prayer bead), +0.00003/-0.00003 (LSM)
Error (95% CI): +0.00024/-0.00026 (Bootstrapping), +0.00006/-0.00007 (Prayer bead)
LSM: chi^2 = 3821.4, n_freedom = 197

REF 90/500 + MII G1-300
exp 30s; Mean Comp HIP 71043; No binning; ccd photometry with C-Munipack

----- EBFit result: -----
Tmin = 2457098.35869
Error (1 sigma): +0.00013/-0.00013 (Bootstrapping), +0.00004/-0.00003 (Prayer bead), +0.00003/-0.00003 (LSM)
Error (95% CI): +0.00026/-0.00024 (Bootstrapping), +0.00006/-0.00006 (Prayer bead)
LSM: chi^2 = 3869.6, n_freedom = 199

EQ6 + 0.25-m f/4 + CCD ST7 + R
# NAME EF Boo
# VAR 14:32:30.54 +50:49:40.7 2448500.3020 0.420512 9.43-10.00Hp EW (VSX 20110211)
# OBS Martin Lehky (Hradec Kralove CZ; 0.25-m f/4 reflector + CCD ST7)
# FLT R
# RED CMunipack 1.1.26 + Peranso 2.50
# NOTE 28/29 III 2014; R_335_20s (276/139) and R_365_20s (264/130); 2.4h and 2.6h; minimum P and minimum S
# NOTE 2456745.33536 +/- 0.00004; 20140328 20:02:55 (UT) GEO
# NOTE 2456745.54505 +/- 0.00050; 20140329 01:04:52 (UT) GEO
# COND fine clear weather

----- EBFit result: -----
Tmin = 2456745.54479
Error (1 sigma): +0.00011/-0.00010 (Bootstrapping), +0.00006/-0.00007 (Prayer bead), +0.00006/-0.00006 (LSM)
Error (95% CI): +0.00020/-0.00022 (Bootstrapping), +0.00010/-0.00014 (Prayer bead)
LSM: chi^2 = 881.1, n_freedom = 259

EQ6 + 0.25-m f/4 + CCD ST7 + R
# NAME EF Boo
# VAR 14:32:30.54 +50:49:40.7 2448500.3020 0.420512 9.43-10.00Hp EW (VSX 20110211)
# OBS Martin Lehky (Hradec Kralove CZ; 0.25-m f/4 reflector + CCD ST7)
# FLT R
# RED CMunipack 1.1.26 + Peranso 2.50
# NOTE 28/29 III 2014; R_335_20s (276/139) and R_365_20s (264/130); 2.4h and 2.6h; minimum P and minimum S
# NOTE 2456745.33536 +/- 0.00004; 20140328 20:02:55 (UT) GEO
# NOTE 2456745.54505 +/- 0.00050; 20140329 01:04:52 (UT) GEO
# COND fine clear weather

----- EBFit result: -----
Tmin = 2456745.33543
Error (1 sigma): +0.00010/-0.00010 (Bootstrapping), +0.00004/-0.00002 (Prayer bead), +0.00005/-0.00005 (LSM)
Error (95% CI): +0.00019/-0.00019 (Bootstrapping), +0.00005/-0.00006 (Prayer bead)
LSM: chi^2 = 1043.4, n_freedom = 271

EQ6 + 0.25-m f/4 + CCD ST7 + R
# NAME EF Boo
# VAR 14:32:30.54 +50:49:40.7 2448500.3020 0.420512 9.43-10.00Hp EW (VSX 20110211)
# OBS Martin Lehky (Hradec Kralove CZ; 0.25-m f/4 reflector + CCD ST7)
# FLT R
# RED CMunipack 1.1.26 + Peranso 2.50
# NOTE 28/29 III 2014; R_335_20s (276/139) and R_365_20s (264/130); 2.4h and 2.6h; minimum P and minimum S
# NOTE 2456745.33536 +/- 0.00004; 20140328 20:02:55 (UT) GEO
# NOTE 2456745.54505 +/- 0.00050; 20140329 01:04:52 (UT) GEO
# COND fine clear weather

EQ6 + 0.25-m f/4 + CCD ST7 + R
# NAME EF Boo
# VAR 14:32:30.54 +50:49:40.7 2448500.3020 0.420512 9.43-10.00Hp EW (VSX 20110211)
# OBS Martin Lehky (Hradec Kralove CZ; 0.25-m f/4 reflector + CCD ST7)
# FLT R
# RED CMunipack 1.1.26 + Peranso 2.50
# NOTE 15/16 IV 2013; R_300_20s (298/140); 2.1h; minimum P
# NOTE 2456398.40990 +/- 0.00031; 20130415 21:50:15 (UT) GEO
# COND fine clear weather

----- EBFit result: -----
Tmin = 2456398.40940
Error (1 sigma): +0.00006/-0.00005 (Bootstrapping), +0.00003/-0.00003 (Prayer bead), +0.00003/-0.00003 (LSM)
Error (95% CI): +0.00010/-0.00010 (Bootstrapping), +0.00005/-0.00009 (Prayer bead)
LSM: chi^2 = 820.9, n_freedom = 293

EQ6 + 0.25-m f/4 + CCD ST7 + R
# NAME EF Boo
# VAR 14:32:30.54 +50:49:40.7 2448500.3020 0.420512 9.43-10.00Hp EW (VSX 20110211)
# OBS Martin Lehky (Hradec Kralove CZ; 0.25-m f/4 reflector + CCD ST7)
# FLT R
# RED CMunipack 1.1.26 + Peranso 2.50
# NOTE 15/16 IV 2013; R_300_20s (298/140); 2.1h; minimum P
# NOTE 2456398.40990 +/- 0.00031; 20130415 21:50:15 (UT) GEO
# COND fine clear weather

EQ6 + 0.25-m f/4 + CCD ST7 + R
# NAME EF Boo
# VAR 14:32:30.54 +50:49:40.7 2448500.3020 0.420512 9.43-10.00Hp EW (VSX 20110211)
# OBS Martin Lehky (Hradec Kralove CZ; 0.25-m f/4 reflector + CCD ST7)
# FLT R
# RED CMunipack 1.1.26 + AVE 2.51
# NOTE 02/03 III 2012; R_260_20s (255/166); minimum P
# NOTE 2455989.66619 +/- 0.00010; 20120303 03:59:19 (UT) GEO
# COND clear weather

EQ6 + 0.25-m f/4 + CCD ST7 + R
# NAME EF Boo
# VAR 14:32:30.54 +50:49:40.7 2448500.3020 0.420512 9.43-10.00Hp EW (VSX 20110211)
# OBS Martin Lehky (Hradec Kralove CZ; 0.25-m f/4 reflector + CCD ST7)
# FLT R
# RED CMunipack 1.1.26 + AVE 2.51
# NOTE 02/03 III 2012; R_260_20s (255/166); minimum P
# NOTE 2455989.66619 +/- 0.00010; 20120303 03:59:19 (UT) GEO
# COND clear weather

EQ6 + 0.25-m f/5 + CCD ST7 + R
# NAME EF Boo
# VAR 14:32:30.54 +50:49:40.7 2448500.3020 0.420512 9.43-10.00Hp EW (VSX 20110211)
# OBS Martin Lehky (Hradec Kralove CZ; 0.25-m f/4 reflector + CCD ST7)
# FLT R
# RED CMunipack 1.1.26 + AVE 2.51
# NOTE 22/23 III 2011; R_370_20s (365/221); minimum P
# NOTE 2455643.58014 +/- 0.00005; 20110323 01:55:24 (UT) GEO
# COND clear weather

EQ6 + 0.25-m f/5 + CCD ST7 + R
# NAME EF Boo
# VAR 14:32:30.54 +50:49:40.7 2448500.3020 0.420512 9.43-10.00Hp EW (VSX 20110211)
# OBS Martin Lehky (Hradec Kralove CZ; 0.25-m f/4 reflector + CCD ST7)
# FLT R
# RED CMunipack 1.1.26 + AVE 2.51
# NOTE 22/23 III 2011; R_370_20s (365/221); minimum P
# NOTE 2455643.58014 +/- 0.00005; 20110323 01:55:24 (UT) GEO
# COND clear weather

EQ6 + 0.25-m f/5 + CCD ST7 + R
# NAME EF Boo
# VAR 14:32:30.54 +50:49:40.7 2448500.3020 0.420512 9.43-10.00Hp EW (VSX 20110211)
# OBS Martin Lehky (Hradec Kralove CZ; 0.25-m f/4 reflector + CCD ST7)
# FLT R
# RED CMunipack 1.1.26 + AVE 2.51
# NOTE 09/10 II 2011; R_290_20s (267/136); minimum S
# NOTE 2455602.57977 +/- 0.00009; 20110210 01:54:52 (UT) GEO
# COND clear weather -> somewhat cloudy (very thick cirrus) -> clear weather

EQ6 + 0.25-m f/5 + CCD ST7 + R
# NAME EF Boo
# VAR 14:32:30.54 +50:49:40.7 2448500.3020 0.420512 9.43-10.00Hp EW (VSX 20110211)
# OBS Martin Lehky (Hradec Kralove CZ; 0.25-m f/4 reflector + CCD ST7)
# FLT R
# RED CMunipack 1.1.26 + AVE 2.51
# NOTE 09/10 II 2011; R_290_20s (267/136); minimum S
# NOTE 2455602.57977 +/- 0.00009; 20110210 01:54:52 (UT) GEO
# COND clear weather -> somewhat cloudy (very thick cirrus) -> clear weather