J/AJ/166/131 Radial velocities for 7 cataclysmic variables (Thorstensen+, 2023) ================================================================================ Optical Studies of Seven Bright Southern Cataclysmic Variable Stars. Thorstensen J.R., Alvarado-Anderson C.K., Burrows A.D., Goebel-Bain R.M., Katz D.C. =2023AJ....166..131T ================================================================================ ADC_Keywords: Stars, variable; Spectra, optical; Radial velocities Keywords: Cataclysmic variable stars ; Nova-like variable stars ; SU Ursae Majoris stars ; U Geminorum stars Abstract: We report spectroscopic observations of seven bright southern cataclysmic variable stars, collected on a single two-week observing run using the 1.9m Radcliffe telescope at the South African Astronomical Observatory. We used a radial-velocity time series, in some cases in combination with other data, to determine or clarify orbital periods for five of them, namely ATOJ061.1478-31.0634, BMAM-V547, MGAB-V202, NSV4202, and V1147Cen. For BMAM-V547, we use data from the Transiting Exoplanet Survey Satellite (TESS) to corroborate and sharpen the orbital period; the TESS data also show a photometric period near 3.93days, likely indicating precession of the accretion disk. Also, we find a periodic modulation in the radial velocities of the SU UMa-type dwarf nova Var Ret2005, but are unable to specify a unique cycle count. Finally, we show a spectrum of ASASSN-VJ061528.41-412007.3 that appears typical of a luminous novalike variable. Description: All our observations are from the 1.9m Radcliffe telescope operated by the South African Astronomical Observatory. We used the SpUpNIC spectrograph with Grating 6, which covered from 4220 to 6860{AA}. The 1.1" slit yielded a FWHM resolution of ~4.5{AA}. Most of our individual exposures were between 8 and 20 minutes. File Summary: -------------------------------------------------------------------------------- FileName Lrecl Records Explanations -------------------------------------------------------------------------------- ReadMe 80 . This file table1.dat 85 7 List of objects table2.dat 55 203 Radial velocities -------------------------------------------------------------------------------- See also: I/337 : Gaia DR1 (Gaia Collaboration, 2016) I/345 : Gaia DR2 (Gaia Collaboration, 2018) J/other/IBVS/5863 : 79th Name-List of Variable Stars (Kazarovets+, 2008) J/ApJ/696/870 : Catalina Real-time Transient Survey (CRTS) (Drake+, 2009) J/ApJS/194/28 : The evolution of cataclysmic variables (Knigge+, 2011) J/MNRAS/435/707 : H{alpha} velocity curves of IM Eri (Armstrong+, 2013) J/ApJ/788/48 : X-ray through NIR photometry of NGC 2617 (Shappee+, 2014) J/AcA/65/313 : Thousand new dwarf novae from the OGLE Survey (Mroz+, 2015) J/AJ/160/151 : RVs 5 cataclysmic variable candidates (Thorstensen, 2020) J/AJ/160/6 : OSMOS &modspec RVs of 30 catac variable (Thorstensen, 2020) Byte-by-byte Description of file: table1.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 28 A28 --- ID Object identifier 30- 31 I2 h RAh [4/13] Gaia DR2 hour of right ascension (ICRS at Ep=2016) 33- 34 I2 min RAm Gaia DR2 minute of right ascension (ICRS at Ep=2016) 36- 41 F6.3 s RAs Gaia DR2 second of right ascension (ICRS at Ep=2016) 43 A1 --- DE- [-] Gaia DR2 sign of declination (ICRS at Ep=2016) 45- 46 I2 deg DEd [31/70] Gaia DR2 degree of declination (ICRS at Ep=2016) 48- 49 I2 arcmin DEm Gaia DR2 arcminute of declination (ICRS at Ep=2016) 51- 55 F5.2 arcsec DEs Gaia DR2 arcsecond of declination (ICRS ar Ep=2016) 57- 60 F4.1 mag Gmag [12.6/16.6] G-band magnitude 62- 65 I4 pc Dist [329/1072] Gaia DR2 distance (1/plx) 67- 68 I2 pc e_Dist [3/24] Error on Dist 70- 85 A16 --- SIMBAD SIMBAD name -------------------------------------------------------------------------------- Byte-by-byte Description of file: table2.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 28 A28 --- ID Object identifier 30- 39 F10.4 d BJD [59984/59998] Barycentric Julian Date of mid-exposure BJD-2400000 (1) 41- 44 I4 km/s RVela [-134/180]? Absorption radial velocity 46- 47 I2 km/s e_RVela [8/21]? Uncertainty in RVela 49- 52 I4 km/s RVele [-247/225] Emission radial velocity 54- 55 I2 km/s e_RVele [3/28] Uncertainty in RVele -------------------------------------------------------------------------------- Note (1): The time argument is referred to UTC (not TAI) and is the barycentric julian date of mid-exposure minus 2400000., which differs from MJD by 0.5d. -------------------------------------------------------------------------------- History: From electronic version of the journal ================================================================================ (End) Prepared by [AAS], Coralie Fix [CDS], 26-Mar-2024