QQ Vir at Shanghai

Time-resolved high-resolution spectroscopy
of the pulsating sdB star QQ Vir (PG1325+101)
John Telting et al., Shanghai, July 2009

-5	-1	+1	+5
page 12

New time-resolved high-resolution spectroscopy of QQ Vir

observing date 2008 Mar 25 Mar 26 total

# spectra 380 396 776

Telescope VLT ESO

Instrument UVES

Resolution R = 40000

FWHM = 7.5km/s

Gaussian broadening σ = 3 km/s

Exposure time 20 sec (main period QQ Vir 137.8 s)

Cycle time 66 sec

Binning 2x2

S/N per spectrum 4 - 11

S/N in 12 phase-folded spectra ~ 75

S/N average spectrum ~ 180

Apparent frequency f1 7.25560 mHz

Radial-velocity amplitude f1 2008 11.9 km/s

Radial-velocity amplitude f1 2003 11.7 km/s (ALFOSC @ NOT)

Telescope	VLT ESO
Instrument	UVES

Resolution	R = 40000
	FWHM = 7.5km/s
	Gaussian broadening σ = 3 km/s

Exposure time	20 sec (main period QQ Vir 137.8 s)
Cycle time	66 sec
Binning	2x2

S/N per spectrum	4 - 11
S/N in 12 phase-folded spectra	~ 75
S/N average spectrum	~ 180

Apparent frequency f1	7.25560 mHz
Radial-velocity amplitude f1 2008	11.9 km/s
Radial-velocity amplitude f1 2003	11.7 km/s (ALFOSC @ NOT)