CV Dra (Eclipsing binary)

RA: 17h 31m 57.24s, DE: +57° 10' 42.30" (262.9884999900, 57.1784166660)

12/8/2012, 16:24 - 12/8/2012, 17:49 (UTC)

Data:
  • Observer: Martin Lehky
  • Created: 12/9/2012, 13:08
  • Station: Hradec Králové, CZ (MPC 048)
  • Instrument: 0.40-m f/5 + CCD G2-1600 + BVRI
  • Photometric band: B
  • Time standard: Gjd
  • Brightness in: Mag
Note:
# NAME CV Dra
# VAR 17:31:57.24 +57:10:42.3 2447305.437 0.617617 9.5-10.1p EW (VSX 20110325)
# OBS Martin Lehky (Hradec Kralove CZ; 0.40-m f/5 reflector + CCD G2-1600)
# FLT BVRI
# RED CMunipack 1.1.26 + Peranso 2.50
# NOTE 08/09 XII 2012; B_75_40s (47); V_75_20s (70/32); R_75_10s (65/27); I_75_10s (67/32); minimum S
# NOTE FLT V 2456270.19995 +/- 0.00049; 20121208 16:47:56 (UT) GEO
# NOTE FLT R 2456270.19924 +/- 0.00031; 20121208 16:46:54 (UT) GEO
# NOTE FLT I 2456270.19951 +/- 0.00041; 20121208 16:47:18 (UT) GEO
# NOTE FLT VRI average 2456270.19956 +/- 0.00049; 20121208 16:47:22 (UT) GEO
# COND clear weather
Determined minima
  • S: 2456270.19973 (12/8/2012, 16:47)
    HJDmin: 2456270.19877 +/- 0.00052  
    Heliocentric correction: -0.00096
    Note: 
    # NAME CV Dra
# VAR 17:31:57.24 +57:10:42.3 2447305.437 0.617617 9.5-10.1p EW (VSX 20110325)
# OBS Martin Lehky (Hradec Kralove CZ; 0.40-m f/5 reflector + CCD G2-1600)
# FLT BVRI
# RED CMunipack 1.1.26 + Peranso 2.50
# NOTE 08/09 XII 2012; B_75_40s (47); V_75_20s (70/32); R_75_10s (65/27); I_75_10s (67/32); minimum S
# NOTE FLT V 2456270.19995 +/- 0.00049; 20121208 16:47:56 (UT) GEO
# NOTE FLT R 2456270.19924 +/- 0.00031; 20121208 16:46:54 (UT) GEO
# NOTE FLT I 2456270.19951 +/- 0.00041; 20121208 16:47:18 (UT) GEO
# NOTE FLT VRI average 2456270.19956 +/- 0.00049; 20121208 16:47:22 (UT) GEO
# COND clear weather

----- EBFit result: -----
Tmin = 2456270.19973
Error (1 sigma): +0.00054/-0.00050 (Bootstrapping), +0.00068/-0.00072 (Prayer bead), +0.00041/-0.00041 (LSM)
Error (95% CI):  +0.00106/-0.00093 (Bootstrapping), +0.00107/-0.00099 (Prayer bead)
LSM: chi^2 = 142.6, n_freedom = 65
  • S: 2456270.19904 (12/8/2012, 16:46)
    HJDmin: 2456270.19808 +/- 0.00045  
    Heliocentric correction: -0.00096
    Note: 
    # NAME CV Dra
# VAR 17:31:57.24 +57:10:42.3 2447305.437 0.617617 9.5-10.1p EW (VSX 20110325)
# OBS Martin Lehky (Hradec Kralove CZ; 0.40-m f/5 reflector + CCD G2-1600)
# FLT BVRI
# RED CMunipack 1.1.26 + Peranso 2.50
# NOTE 08/09 XII 2012; B_75_40s (47); V_75_20s (70/32); R_75_10s (65/27); I_75_10s (67/32); minimum S
# NOTE FLT V 2456270.19995 +/- 0.00049; 20121208 16:47:56 (UT) GEO
# NOTE FLT R 2456270.19924 +/- 0.00031; 20121208 16:46:54 (UT) GEO
# NOTE FLT I 2456270.19951 +/- 0.00041; 20121208 16:47:18 (UT) GEO
# NOTE FLT VRI average 2456270.19956 +/- 0.00049; 20121208 16:47:22 (UT) GEO
# COND clear weather

----- EBFit result: -----
Tmin = 2456270.19904
Error (1 sigma): +0.00044/-0.00046 (Bootstrapping), +0.00009/-0.00010 (Prayer bead), +0.00042/-0.00042 (LSM)
Error (95% CI):  +0.00090/-0.00090 (Bootstrapping), +0.00021/-0.00024 (Prayer bead)
LSM: chi^2 = 92.8, n_freedom = 60
  • S: 2456270.19855 (12/8/2012, 16:45)
    HJDmin: 2456270.19759 +/- 0.00051  
    Heliocentric correction: -0.00096
    Note: 
    # NAME CV Dra
# VAR 17:31:57.24 +57:10:42.3 2447305.437 0.617617 9.5-10.1p EW (VSX 20110325)
# OBS Martin Lehky (Hradec Kralove CZ; 0.40-m f/5 reflector + CCD G2-1600)
# FLT BVRI
# RED CMunipack 1.1.26 + Peranso 2.50
# NOTE 08/09 XII 2012; B_75_40s (47); V_75_20s (70/32); R_75_10s (65/27); I_75_10s (67/32); minimum S
# NOTE FLT V 2456270.19995 +/- 0.00049; 20121208 16:47:56 (UT) GEO
# NOTE FLT R 2456270.19924 +/- 0.00031; 20121208 16:46:54 (UT) GEO
# NOTE FLT I 2456270.19951 +/- 0.00041; 20121208 16:47:18 (UT) GEO
# NOTE FLT VRI average 2456270.19956 +/- 0.00049; 20121208 16:47:22 (UT) GEO
# COND clear weather

----- EBFit result: -----
Tmin = 2456270.19855
Error (1 sigma): +0.00050/-0.00053 (Bootstrapping), +0.00028/-0.00023 (Prayer bead), +0.00042/-0.00042 (LSM)
Error (95% CI):  +0.00101/-0.00108 (Bootstrapping), +0.00043/-0.00034 (Prayer bead)
LSM: chi^2 = 95.4, n_freedom = 62
Actions:
Light curve
Neighborhood of the object, comparison and check stars
Chart - CV Dra, JD 2456270.18363
Comments