HK25, NWT 250/1000 + SBIG ST-7 + Rc
# NAME GR Boo
# VAR 14:59:54.55 +25:54:33.6 2451996.584 0.37667 11.45-11.9 EW (VSX 20190404)
# 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 30/31 III 2019; Rc_155_60s (136/72); 2.8h; minimum P
# NOTE 2458573.59908 +/- 0.00012; 20190331 02:22:41 (UT) GEO
# COND fine clear weather

----- EBFit result: -----
Tmin = 2458573.59909
Error (1 sigma): +0.00016/-0.00016 (Bootstrapping), +0.00015/-0.00010 (Prayer bead), +0.00012/-0.00012 (LSM)
Error (95% CI): +0.00033/-0.00032 (Bootstrapping), +0.00018/-0.00012 (Prayer bead)
LSM: chi^2 = 203.2, n_freedom = 131

HK25, NWT 250/1000 + SBIG ST-7 + Rc
# NAME GR Boo
# VAR 14:59:54.55 +25:54:33.6 2451996.584 0.37667 11.45-11.9 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_106_60s (104/56); 1.9h; minimum P
# NOTE 2458302.40107 +/- 0.00015; 20180702 21:37:32 (UT) GEO
# COND fine clear weather

----- EBFit result: -----
Tmin = 2458302.40106
Error (1 sigma): +0.00017/-0.00015 (Bootstrapping), +0.00010/-0.00009 (Prayer bead), +0.00015/-0.00015 (LSM)
Error (95% CI): +0.00033/-0.00032 (Bootstrapping), +0.00021/-0.00011 (Prayer bead)
LSM: chi^2 = 134.9, n_freedom = 99

HK25, NWT 250/1000 + SBIG ST-7 + Rc
# NAME GR Boo
# VAR 14:59:54.55 +25:54:33.6 2451996.584 0.37667 11.45-11.9 EW (VSX 20180418)
# 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 17/18 IV 2018; Rc_140_60s (136/87); 2.5h; minimum S
# NOTE 2458226.49817 +/- 0.00013; 20180417 23:57:22 (UT) GEO
# COND clear weather

----- EBFit result: -----
Tmin = 2458226.49818
Error (1 sigma): +0.00019/-0.00019 (Bootstrapping), +0.00006/-0.00008 (Prayer bead), +0.00013/-0.00013 (LSM)
Error (95% CI): +0.00036/-0.00037 (Bootstrapping), +0.00011/-0.00010 (Prayer bead)
LSM: chi^2 = 179.5, n_freedom = 96

HK25, NWT 250/1000 + SBIG ST-7 + BVRcIc
# NAME GR Boo
# VAR 14:59:54.55 +25:54:33.6 2451996.584 0.37667 11.45-11.9 EW (VSX 20170503)
# OBS Martin Lehky (Hradec Kralove CZ; 0.25-m f/4 reflector + CCD ST7)
# FLT VRcIc
# RED CMunipack 1.1.26 + Peranso 2.50 + SPHE/VSES Upload Form (2012) var.astro.cz
# NOTE 18/19 V 2017; V_40_90s (37/23); Rc_40_60s (38/21); Ic_40_60s (39/22); 2.5h; minimum S
# NOTE FLT V 2457892.39408 +/- 0.00032; 20170518 21:27:29 (UT) GEO
# NOTE FLT Rc 2457892.39445 +/- 0.00020; 20170518 21:28:00 (UT) GEO
# NOTE FLT Ic 2457892.39506 +/- 0.00026; 20170518 21:28:53 (UT) GEO
# NOTE FLT VRcIc average 2457892.39453 +/- 0.00032; 20170518 21:28:07 (UT) GEO
# COND fine clear weather

----- EBFit result: -----
Tmin = 2457892.39471
Error (1 sigma): +0.00040/-0.00039 (Bootstrapping), +0.00022/-0.00026 (Prayer bead), +0.00030/-0.00030 (LSM)
Error (95% CI): +0.00078/-0.00078 (Bootstrapping), +0.00035/-0.00037 (Prayer bead)
LSM: chi^2 = 35.6, n_freedom = 23

HK25, NWT 250/1000 + SBIG ST-7 + BVRcIc
# NAME GR Boo
# VAR 14:59:54.55 +25:54:33.6 2451996.584 0.37667 11.45-11.9 EW (VSX 20170503)
# OBS Martin Lehky (Hradec Kralove CZ; 0.25-m f/4 reflector + CCD ST7)
# FLT VRcIc
# RED CMunipack 1.1.26 + Peranso 2.50 + SPHE/VSES Upload Form (2012) var.astro.cz
# NOTE 18/19 V 2017; V_40_90s (37/23); Rc_40_60s (38/21); Ic_40_60s (39/22); 2.5h; minimum S
# NOTE FLT V 2457892.39408 +/- 0.00032; 20170518 21:27:29 (UT) GEO
# NOTE FLT Rc 2457892.39445 +/- 0.00020; 20170518 21:28:00 (UT) GEO
# NOTE FLT Ic 2457892.39506 +/- 0.00026; 20170518 21:28:53 (UT) GEO
# NOTE FLT VRcIc average 2457892.39453 +/- 0.00032; 20170518 21:28:07 (UT) GEO
# COND fine clear weather

----- EBFit result: -----
Tmin = 2457892.39445
Error (1 sigma): +0.00023/-0.00024 (Bootstrapping), +0.00007/-0.00006 (Prayer bead), +0.00020/-0.00020 (LSM)
Error (95% CI): +0.00050/-0.00047 (Bootstrapping), +0.00013/-0.00014 (Prayer bead)
LSM: chi^2 = 54.7, n_freedom = 33

HK25, NWT 250/1000 + SBIG ST-7 + BVRcIc
# NAME GR Boo
# VAR 14:59:54.55 +25:54:33.6 2451996.584 0.37667 11.45-11.9 EW (VSX 20170503)
# OBS Martin Lehky (Hradec Kralove CZ; 0.25-m f/4 reflector + CCD ST7)
# FLT VRcIc
# RED CMunipack 1.1.26 + Peranso 2.50 + SPHE/VSES Upload Form (2012) var.astro.cz
# NOTE 18/19 V 2017; V_40_90s (37/23); Rc_40_60s (38/21); Ic_40_60s (39/22); 2.5h; minimum S
# NOTE FLT V 2457892.39408 +/- 0.00032; 20170518 21:27:29 (UT) GEO
# NOTE FLT Rc 2457892.39445 +/- 0.00020; 20170518 21:28:00 (UT) GEO
# NOTE FLT Ic 2457892.39506 +/- 0.00026; 20170518 21:28:53 (UT) GEO
# NOTE FLT VRcIc average 2457892.39453 +/- 0.00032; 20170518 21:28:07 (UT) GEO
# COND fine clear weather

----- EBFit result: -----
Tmin = 2457892.39408
Error (1 sigma): +0.00058/-0.00053 (Bootstrapping), +0.00014/-0.00013 (Prayer bead), +0.00032/-0.00032 (LSM)
Error (95% CI): +0.00104/-0.00117 (Bootstrapping), +0.00022/-0.00021 (Prayer bead)
LSM: chi^2 = 95.4, n_freedom = 32

HK25, NWT 250/1000 + SBIG ST-7 + BVRcIc
# NAME GR Boo
# VAR 14:59:54.55 +25:54:33.6 2451996.584 0.37667 11.45-11.9 EW (VSX 20170503)
# OBS Martin Lehky (Hradec Kralove CZ; 0.25-m f/4 reflector + CCD ST7)
# FLT VRcIc
# RED CMunipack 1.1.26 + Peranso 2.50 + SPHE/VSES Upload Form (2012) var.astro.cz
# NOTE 02/03 V 2017; V_30_90s (26/16); Rc_30_60s (30/17); Ic_30_60s (30/17); 2.1h; minimum P
# NOTE FLT V 2457876.38576 +/- 0.00034; 20170502 21:15:30 (UT) GEO
# NOTE FLT Rc 2457876.38583 +/- 0.00021; 20170502 21:15:36 (UT) GEO
# NOTE FLT Ic 2457876.38622 +/- 0.00029; 20170502 21:16:09 (UT) GEO
# NOTE FLT VRcIc average 2457876.38593 +/- 0.00034; 20170502 21:15:44 (UT) GEO

----- EBFit result: -----
Tmin = 2457876.38622
Error (1 sigma): +0.00019/-0.00017 (Bootstrapping), +0.00008/-0.00010 (Prayer bead), +0.00029/-0.00029 (LSM)
Error (95% CI): +0.00039/-0.00039 (Bootstrapping), +0.00018/-0.00026 (Prayer bead)
LSM: chi^2 = 15.1, n_freedom = 21

HK25, NWT 250/1000 + SBIG ST-7 + BVRcIc
# NAME GR Boo
# VAR 14:59:54.55 +25:54:33.6 2451996.584 0.37667 11.45-11.9 EW (VSX 20170503)
# OBS Martin Lehky (Hradec Kralove CZ; 0.25-m f/4 reflector + CCD ST7)
# FLT VRcIc
# RED CMunipack 1.1.26 + Peranso 2.50 + SPHE/VSES Upload Form (2012) var.astro.cz
# NOTE 02/03 V 2017; V_30_90s (26/16); Rc_30_60s (30/17); Ic_30_60s (30/17); 2.1h; minimum P
# NOTE FLT V 2457876.38576 +/- 0.00034; 20170502 21:15:30 (UT) GEO
# NOTE FLT Rc 2457876.38583 +/- 0.00021; 20170502 21:15:36 (UT) GEO
# NOTE FLT Ic 2457876.38622 +/- 0.00029; 20170502 21:16:09 (UT) GEO
# NOTE FLT VRcIc average 2457876.38593 +/- 0.00034; 20170502 21:15:44 (UT) GEO

----- EBFit result: -----
Tmin = 2457876.38579
Error (1 sigma): +0.00029/-0.00031 (Bootstrapping), +0.00005/-0.00004 (Prayer bead), +0.00021/-0.00021 (LSM)
Error (95% CI): +0.00054/-0.00060 (Bootstrapping), +0.00006/-0.00007 (Prayer bead)
LSM: chi^2 = 36.4, n_freedom = 23

HK25, NWT 250/1000 + SBIG ST-7 + BVRcIc
# NAME GR Boo
# VAR 14:59:54.55 +25:54:33.6 2451996.584 0.37667 11.45-11.9 EW (VSX 20170503)
# OBS Martin Lehky (Hradec Kralove CZ; 0.25-m f/4 reflector + CCD ST7)
# FLT VRcIc
# RED CMunipack 1.1.26 + Peranso 2.50 + SPHE/VSES Upload Form (2012) var.astro.cz
# NOTE 02/03 V 2017; V_30_90s (26/16); Rc_30_60s (30/17); Ic_30_60s (30/17); 2.1h; minimum P
# NOTE FLT V 2457876.38576 +/- 0.00034; 20170502 21:15:30 (UT) GEO
# NOTE FLT Rc 2457876.38583 +/- 0.00021; 20170502 21:15:36 (UT) GEO
# NOTE FLT Ic 2457876.38622 +/- 0.00029; 20170502 21:16:09 (UT) GEO
# NOTE FLT VRcIc average 2457876.38593 +/- 0.00034; 20170502 21:15:44 (UT) GEO

----- EBFit result: -----
Tmin = 2457876.38578
Error (1 sigma): +0.00033/-0.00041 (Bootstrapping), +0.00015/-0.00017 (Prayer bead), +0.00035/-0.00035 (LSM)
Error (95% CI): +0.00063/-0.00075 (Bootstrapping), +0.00022/-0.00027 (Prayer bead)
LSM: chi^2 = 16.8, n_freedom = 18

EQ6 + 0.25-m f/4 + CCD ST7 + R
# NAME GR Boo
# VAR 14:59:54.55 +25:54:33.6 2452500.1923 0.3766703 11.45-11.9 EW (VSX 20110301)
# 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 07/08 V 2015; Rc_150_60s (103/67); 2.9h; minimum P
# NOTE 2457150.54905 +/- 0.00018; 20150508 01:10:38 (UT) GEO
# COND clear weather => somewhat cloudy

----- EBFit result: -----
Tmin = 2457150.54905
Error (1 sigma): +0.00019/-0.00020 (Bootstrapping), +0.00028/-0.00026 (Prayer bead), +0.00018/-0.00018 (LSM)
Error (95% CI): +0.00038/-0.00037 (Bootstrapping), +0.00070/-0.00050 (Prayer bead)
LSM: chi^2 = 125.2, n_freedom = 98

EQ6 + 0.25-m f/4 + CCD ST7 + R
# NAME GR Boo
# VAR 14:59:54.55 +25:54:33.6 2452500.1923 0.3766703 11.45-11.9 EW (VSX 20110301)
# 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 10/11 IV 2015; Rc_90_60s (76/52); 1.6h; minimum S
# NOTE 2457123.61404 +/- 0.00025; 20150411 02:44:13 (UT) GEO
# COND clear weather

----- EBFit result: -----
Tmin = 2457123.61404
Error (1 sigma): +0.00021/-0.00024 (Bootstrapping), +0.00007/-0.00008 (Prayer bead), +0.00025/-0.00025 (LSM)
Error (95% CI): +0.00047/-0.00042 (Bootstrapping), +0.00016/-0.00015 (Prayer bead)
LSM: chi^2 = 57.3, n_freedom = 71

Schmidt-Newton 0.25m F/4, CCD MX 716
Binn 2x2, 25 sec Exposure.

----- EBFit result: -----
Tmin = 2457102.52569
Error (1 sigma): +0.00021/-0.00024 (Bootstrapping), +0.00011/-0.00012 (Prayer bead), +0.00010/-0.00010 (LSM)
Error (95% CI): +0.00042/-0.00047 (Bootstrapping), +0.00019/-0.00026 (Prayer bead)
LSM: chi^2 = 415.7, n_freedom = 95

EQ6 + 0.25-m f/4 + CCD ST7 + R
# NAME GR Boo
# VAR 14:59:54.55 +25:54:33.6 2452500.1923 0.3766703 11.45-11.9 EW (VSX 20110301)
# OBS Martin Lehky (Hradec Kralove CZ; 0.25-m f/4 reflector + CCD ST7)
# FLT R
# RED CMunipack 1.1.26 + Peranso 2.50 + SPHE/VSES Upload Form (2012) var.astro.cz
# NOTE 20/21 V 2014; R_80_60s (78/40); 1.5h; minimum P
# NOTE 2456798.36305 +/- 0.00011; 20140520 20:42:48 (UT) GEO
# COND fine clear weather

----- EBFit result: -----
Tmin = 2456798.36306
Error (1 sigma): +0.00016/-0.00015 (Bootstrapping), +0.00011/-0.00011 (Prayer bead), +0.00011/-0.00011 (LSM)
Error (95% CI): +0.00031/-0.00030 (Bootstrapping), +0.00027/-0.00022 (Prayer bead)
LSM: chi^2 = 139.2, n_freedom = 72

EQ6 + 0.25-m f/4 + CCD ST7 + R
# NAME GR Boo
# VAR 14:59:54.55 +25:54:33.6 2452500.1923 0.3766703 11.45-11.9 EW (VSX 20110301)
# 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_105_60s (93/42); 2.0h; minimum S
# NOTE 2456745.44125 +/- 0.00011; 20140328 22:35:24 (UT) GEO
# COND clear weather

----- EBFit result: -----
Tmin = 2456745.44041
Error (1 sigma): +0.00018/-0.00019 (Bootstrapping), +0.00014/-0.00013 (Prayer bead), +0.00013/-0.00013 (LSM)
Error (95% CI): +0.00036/-0.00034 (Bootstrapping), +0.00015/-0.00016 (Prayer bead)
LSM: chi^2 = 153.1, n_freedom = 88

EQ6 + 0.25-m f/4 + CCD ST7 + R
# NAME GR Boo
# VAR 14:59:54.55 +25:54:33.6 2452500.1923 0.3766703 11.45-11.9 EW (VSX 20110301)
# 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 20/21 V 2013; R_105_60s (98/59); 1.9h; minimum P
# NOTE 2456433.37080 +/- 0.00014; 20130520 20:53:57 (UT) GEO
# COND clear weather => somewhat cloudy

----- EBFit result: -----
Tmin = 2456433.37156
Error (1 sigma): +0.00023/-0.00022 (Bootstrapping), +0.00058/-0.00032 (Prayer bead), +0.00014/-0.00014 (LSM)
Error (95% CI): +0.00046/-0.00046 (Bootstrapping), +0.00097/-0.00065 (Prayer bead)
LSM: chi^2 = 162.6, n_freedom = 93

EQ6 + 0.25-m f/4 + CCD ST7 + R
# NAME GR Boo
# VAR 14:59:54.55 +25:54:33.6 2452500.1923 0.3766703 11.45-11.9 EW (VSX 20110301)
# 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 2012; R_139_60s (137/66); minimum P
# NOTE 2456009.62006 +/- 0.00019; 20120323 02:52:53 (UT) GEO
# COND clear weather

EQ6 + 0.25-m f/5 + CCD ST7 + R
# NAME GR Boo
# VAR 14:59:54.55 +25:54:33.6 2452500.1923 0.3766703 11.45-11.9 EW (VSX 20110301)
# 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 19/20 IV 2011; R_140_60s (129/55); minimum S
# NOTE 2455671.55941 +/- 0.00012; 20110420 01:25:33 (UT) GEO
# COND clear weather

EQ6 + 0.25-m f/5 + CCD ST7 + R
# NAME GR Boo
# VAR 14:59:54.55 +25:54:33.6 2452500.1923 0.3766703 11.45-11.9 EW (VSX 20110301)
# 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 28 II / 01 III 2011; R_155_60s (152/86); minimum P
# NOTE 2455621.65203 +/- 0.00012; 20110301 03:38:52 (UT) GEO
# COND clear weather (cirrus)