J/other/JAD/14.1 GSC04778-00152 photometry and spectroscopy (Tuvikene+, 2008) ================================================================================ Photometry and spectroscopy of the contact binary GSC04778-00152. Tuvikene T., Sterken C., Eenmae T., Hinojosa-Goni R., Brogt E., Longa Pena P., Liimets T., Ahumada M., Troncoso P., Vogt N. =2008JAD....14....1T ================================================================================ ADC_Keywords: Stars, variable ; Photometry, UBVRI ; Spectroscopy Keywords: technique: photometric - technique: spectroscopic - stars: individual: GSC 04778-00152 Abstract: Photometric and spectroscopic data of the southern contact binary GSC 04778-00152 are presented. Six new times of minimum are listed. For modelling purposes, we provide UBVRI phase diagrams of the contact binary with the contribution of the nearby companion removed. Description: CCD photometry of GSC04778-00152 was carried out on 54 nights during 9 observing runs. In January 2006 the observations were made with the 41-cm Meade telescope at Observatorio Cerro Armazones (OCA), Chile, using an SBIG STL-6303E CCD camera (3072x2048 pixels, FOV 23.0'x15.4') and Johnson V filter. On 3 nights in December 2006 and on 2 nights in October 2007 we used the 2.4-m Hiltner telescope at the MDM Observatory, Arizona, USA, equipped with the 8kx8k Mosaic imager (FOV 23.6'x23.6'). In December 2006 and January 2007, we also used the 41-cm Meade telescope at OCA, using an SBIG ST-7XME CCD camera (FOV 5.9'x3.9') with no filter. Figure 3 shows all OCA light curves obtained with this configuration. At Tartu Observatory the observations were carried out in December 2006 and January 2007, using the 60-cm telescope with a SpectraSource Instruments HPC-1 camera (1024x1024 pixels, FOV 11.2'x11.2') and V filter. From January to March 2007 the system was observed using the 1.0-m telescope at SAAO, Sutherland, South Africa with an STE4 CCD camera (1024x1024 pixels, FOV 5.3'x5.3') and UBVRI filters. Spectroscopic observations were carried out at the Tartu Observatory, Estonia, using the 1.5-m telescope with the Cassegrain spectrograph ASP-32 and an Andor Newton CCD camera. Objects: --------------------------------------------------------------- RA (2000) DE Designation(s) --------------------------------------------------------------- 05 31 21.46 -07 23 43.5 GSC 04778-00152 = TYC 4778-152-1 --------------------------------------------------------------- File Summary: -------------------------------------------------------------------------------- FileName Lrecl Records Explanations -------------------------------------------------------------------------------- ReadMe 80 . This file photom.dat 38 5281 Differential magnitudes of GSC 04778-00152 together with the visual companion spectro.dat 30 12051 Spectra of GSC 04778-00152 at various epochs phases.dat 17 859 Phase diagrams of the contact binary alone (excluding the companion) in the UBVRI passbands -------------------------------------------------------------------------------- Byte-by-byte Description of file: photom.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 13 F13.5 d HJD Heliocentric Julian Date 15- 21 F7.4 mag dmag Differential magnitude 23- 24 A2 --- Filt [UBVRI nf] Filter used (nf for no filter) 26- 30 A5 --- Obs Observatory (1) 32- 38 A7 --- Date Observation date -------------------------------------------------------------------------------- Note (1): Observatory code as follows: MDM = MDM Observatory, Arizona, USA (V band) OCA = Observatorio Cerro Armazones (OCA), Chile, (Johnson V band and no filter) SAAO = SAAO, Sutherland, South Africa, (UBVRI bands) TARTU = Tartu Observatory, Estonia (V band) -------------------------------------------------------------------------------- Byte-by-byte Description of file: spectro.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 6 F6.1 0.1nm lambda Wavelength 9- 17 F9.7 --- Int Relative intensity 19- 28 A10 "YYYY/MM/DD" Date Observation date 30 I1 --- n_Date [1/2]? Set number of 2007/02/10 observations -------------------------------------------------------------------------------- Byte-by-byte Description of file: phases.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 7 F7.5 --- Phase Orbital phase 9- 15 F7.4 mag mag Magnitude 17 A1 --- Filt [UBVRI] Filter -------------------------------------------------------------------------------- Acknowledgements: Taavi Tuvikene, taavi(at)aai.ee ================================================================================ (End) T. Tuvikene [Vrije Univ. Brussel], Patricia Vannier [CDS] 10-Apr-2012