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J/A+A/531/A49    UBV and spectroscopic variations of V2368 Oph (Harmanec+, 2011)

V2368 Ophiuchi: An eclipsing and double-lined spectroscopic binary used as a photometric comparison star for U Oph. Harmanec P., Bozic H., Mayer P., Eenens P., Broz M., Wolf M., Yang S., Slechta M., Ruzdjak D., Sudar D., Ak H. <Astron. Astrophys. 531, A49 (2011)> =2011A&A...531A..49H
ADC_Keywords: Binaries, spectroscopic ; Photometry, UBV ; Radial velocities ; Spectroscopy Keywords: stars: early-type - stars: binaries - stars: individual: V2368 Oph - stars: individual: U Oph - binaries: spectroscopic Abstract: The A-type star HR 6412 = V2368 Oph was used by several investigators as a photometric comparison star for the known eclipsing binary U Oph but was found to be variable by three independent groups, including us. By analysing series of new spectral and photometric observations and a critical compilation of available radial velocities, we were able to find the correct period of light and radial-velocity variations and demonstrate that the object is an eclipsing and double-lined spectroscopic binary moving in a highly eccentric orbit. We derived a linear ephemeris Tmin.I=HJD(2454294.67±0.01)+(38.32712±0.00004)d*E and estimated preliminary basic physical properties of the binary. Description: After realising that V2368 Oph is a variable star, we started systematic UBV observations of it at Hvar and SPM observatories. A limited set of UBV observations was also obtained by HA at the Turkish National Observatory. Simultaneously with photometric observations, we also begun to collect electronic spectra in Ondrejov, San Pedro Martir, and Dominion Astrophysical Observatory. Objects: ---------------------------------------------------- RA (2000) DE Designation(s) ---------------------------------------------------- 17 16 14.25 +02 11 10.5 V2368 Oph = HR 6412 ---------------------------------------------------- File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table2a.dat 37 158 All-sky Johnson V photometry of V2368 Oph table2b.dat 37 585 Standard UBV photometry of V2368 Oph from three stations table3a.dat 40 153 Hα radial velocities of the primary of V2368 Oph measured with the SPEFO program (Horn et al. 1996A&A...309..521H) table3b.dat 40 135 SiII, Hα, and MgII radial velocities of both components of V2368 Oph measured via Gaussian fits to the line profiles rjd.dat 48 217 List of Hα, SiII and MgII spectra spectra/* 18 188 Individual spectra
Byte-by-byte Description of file: table2?.dat
Bytes Format Units Label Explanations
1- 12 F12.4 d HJD Heliocentric Julian date 14- 18 F5.3 mag Vmag Johnson V magnitude 20- 24 F5.3 mag Bmag ? Johnson B magnitude 26- 30 F5.3 mag Umag ? Johnson U magnitude 32- 34 F3.1 --- w Weight of the data point 36- 37 I2 --- Obs Code of the observatory (1)
Note (1): Code of the observatory as follows: 1 = Hvar observatory 30 = San Pedro Martir 0.84-m 61 = Hipparcos satellite Hp photometry transformed to Johnson V 66 = Tubitak National Observatory 93 = ASAS3 automatic telescope
Byte-by-byte Description of file: table3?.dat
Bytes Format Units Label Explanations
1- 12 F12.4 d HJD Heliocentric Julian date 15- 20 F6.2 km/s RV1 Radial velocity of the primary 22- 27 F6.1 km/s RV2 ? Radial velocity of the secondary (2) 30- 34 F5.3 --- w ? Weight of the data point (2) 37- 40 A4 --- Line [MgII Ha SiII] Line (G1) (2)
Note (2): Only in table3b.dat
Byte-by-byte Description of file: rjd.dat
Bytes Format Units Label Explanations
1- 4 I4 0.1nm lam.min Lower limit of wavelength range 6- 9 I4 0.1nm lam.max Upper limit of wavelength range 11- 14 A4 --- Line [MgII Ha SiII] Line (G1) 16- 27 A12 --- FileName Filename of individual spectra 29- 40 F12.4 d HJD Heliocentric Julian date 44- 48 F5.3 --- w weights of individual spectra from S/N
Byte-by-byte Description of file (# headlines): spectra/*
Bytes Format Units Label Explanations
1- 10 F10.4 0.1nm lambda Wavelength 13- 18 F6.4 --- RFlux Relative rectified flux
Global notes: Note (G1): Lines as follows: MgII = Mg II λ4481 line SiII = Si II doublet lines λ6347 and 6371Å Ha = Hα line
Acknowledgements: Petr Harmanec, hec(at) History: * 06-Jun-2011: Original version * 07-Aug-2011: added the limits in the wavelength in the list of spectra (file "rjd.dat")
(End) Patricia Vannier [CDS] 06-Jun-2011
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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