GU Boo (Eclipsing binary, Eruptive variable)

RA: 15h 21m 54.80s, DE: +33° 56' 10.00" (230.4783333333, 33.9361111108)

4/8/2020, 19:56 - 4/8/2020, 23:12 (UTC)

Data:
  • Observer: Martin Lehky
  • Created: 7/23/2020, 12:25
  • Station: Hradec Králové, CZ (MPC 048)
  • Instrument: 0.40-m f/5 + CCD G2-1600 + BVRcIc
  • Photometric band: V
  • Time standard: Gjd
  • Brightness in: Mag
Note:
# NAME GU Boo
# VAR 15:21:54.82 +33:56:09.9 2451275.87500 0.48873 13.1-13.7R1 EA (VSX 20200413)
# OBS Martin Lehky (Hradec Kralove CZ; 0.40-m f/5 reflector + CCD G2-1600)
# FLT VRc
# RED CMunipack 1.1.26 + Peranso 2.50 + SPHE/VSES Upload Form (2012) var.astro.cz
# NOTE 08/09 IV 2020; V_76_90s (75/59); Rc_76_60s (71/55); 3.2h; minimum P
# NOTE FLT V 2458948.43925 +/- 0.00018; 20200408 22:32:31 (UT) GEO
# NOTE FLT Rc 2458948.43953 +/- 0.00013; 20200408 22:32:55 (UT) GEO
# NOTE FLT VRc average 2458948.43939 +/- 0.00018; 20200408 22:32:43 (UT) GEO
# COND clear weather, full moon period
Determined minima
  • P: 2458948.43925 (4/8/2020, 22:32)
    HJDmin: 2458948.44285 +/- 0.00011  
    Heliocentric correction: 0.00360
    Note: 
    # NAME GU Boo
# VAR 15:21:54.82 +33:56:09.9 2451275.87500 0.48873 13.1-13.7R1 EA (VSX 20200413)
# OBS Martin Lehky (Hradec Kralove CZ; 0.40-m f/5 reflector + CCD G2-1600)
# FLT VRc
# RED CMunipack 1.1.26 + Peranso 2.50 + SPHE/VSES Upload Form (2012) var.astro.cz
# NOTE 08/09 IV 2020; V_76_90s (75/59); Rc_76_60s (71/55); 3.2h; minimum P
# NOTE FLT V 2458948.43925 +/- 0.00018; 20200408 22:32:31 (UT) GEO
# NOTE FLT Rc 2458948.43953 +/- 0.00013; 20200408 22:32:55 (UT) GEO
# NOTE FLT VRc average 2458948.43939 +/- 0.00018; 20200408 22:32:43 (UT) GEO
# COND clear weather, full moon period

----- EBFit result: -----
Tmin = 2458948.43925
Error (1 sigma): +0.00010/-0.00011 (Bootstrapping), +0.00002/-0.00002 (Prayer bead), +0.00018/-0.00018 (LSM)
Error (95% CI):  +0.00021/-0.00021 (Bootstrapping), +0.00004/-0.00004 (Prayer bead)
LSM: chi^2 = 9.2, n_freedom = 28
  • P: 2458948.43953 (4/8/2020, 22:32)
    HJDmin: 2458948.44313 +/- 0.00009  
    Heliocentric correction: 0.00360
    Note: 
    # NAME GU Boo
# VAR 15:21:54.82 +33:56:09.9 2451275.87500 0.48873 13.1-13.7R1 EA (VSX 20200413)
# OBS Martin Lehky (Hradec Kralove CZ; 0.40-m f/5 reflector + CCD G2-1600)
# FLT VRc
# RED CMunipack 1.1.26 + Peranso 2.50 + SPHE/VSES Upload Form (2012) var.astro.cz
# NOTE 08/09 IV 2020; V_76_90s (75/59); Rc_76_60s (71/55); 3.2h; minimum P
# NOTE FLT V 2458948.43925 +/- 0.00018; 20200408 22:32:31 (UT) GEO
# NOTE FLT Rc 2458948.43953 +/- 0.00013; 20200408 22:32:55 (UT) GEO
# NOTE FLT VRc average 2458948.43939 +/- 0.00018; 20200408 22:32:43 (UT) GEO
# COND clear weather, full moon period

----- EBFit result: -----
Tmin = 2458948.43953
Error (1 sigma): +0.00008/-0.00009 (Bootstrapping), +0.00005/-0.00005 (Prayer bead), +0.00013/-0.00013 (LSM)
Error (95% CI):  +0.00017/-0.00019 (Bootstrapping), +0.00008/-0.00010 (Prayer bead)
LSM: chi^2 = 13.2, n_freedom = 27
Actions:
Light curve
Neighborhood of the object, comparison and check stars
Chart - GU Boo, JD 2458948.33099
Comments