J/A+A/572/A99 4U 0614+091 VLT spectrum (Baglio+, 2014)
Polarimetric and spectroscopic optical observations of the ultra-compact X-ray
binary 4U 0614+091.
Baglio M.C., Mainetti D., D'Avanzo P., Campana S., Covino S., Russell D.M.,
Shahbaz T.
<Astron. Astrophys. 572, A99 (2014)>
=2014A&A...572A..99B 2014A&A...572A..99B
ADC_Keywords: Binaries, X-ray ; Spectroscopy ; Polarization
Keywords: stars: jets - stars: neutron - X-rays: binaries - polarization
Abstract:
We present a polarimetric and spectroscopic study of the persistent
ultra-compact X-ray binary 4U 0614+091 aimed at searching for the
emission of a relativistic particle jet and at unveiling the orbital
period Porb of the system.
We obtained r-band polarimetric observations with the Telescopio
Nazionale Galileo (TNG) equipped with the PAOLO polarimeter and with
the Nordic Optical Telescope (NOT) equipped with the ALFOSC
instrument, covering ∼2h and ∼0.5h observations, respectively. We
carried out low resolution spectroscopy of the system using the ESO
Very Large Telescope equipped with FORS1 for ∼1.5h (16 spectra
covering the range 4300-8000Å).
Description:
Spectroscopic data obtained with the ESO VLT (equipped with FORS1)
Polarimetric data obtained with both the TNG (PAOLO polarimeter) and
the NOT (WeDoWo instrument).
Objects:
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RA (2000) DE Designation(s)
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06 17 07.3 +09 08 13 4U 0614+091 = V* V1055 Ori
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 36 7 Stokes parameters
table3.dat 23 2 Results of the sinusoidal fit of the equivalent
width variations for the two selected lines
ew.dat 28 8 Equivalent widths of the CII 724nm line
spectrum.dat 22 934 Average spectrum of 4U 0614+091 (440-755nm)
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Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 13 A13 --- Name Name of the object in analysis
(or "Weighted mean" in last line)
16- 20 F5.2 % Q Stokes parameter Q
22- 25 F4.2 % e_Q Stokes parameter Q error
27- 31 F5.2 % U Stokes parameter U
33- 36 F4.2 % e_U Stokes parameter U error
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 4 I4 0.1nm lambda Wavelength of the observed line
6- 9 F4.1 min Per Period of the oscillation
11- 13 F3.1 min e_Per Error of the period
15- 18 F4.2 --- chi2 Reduced χ2 of the sinusoidal fit
20- 23 F4.1 % CL [1/46] Confidence level of the fit
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Byte-by-byte Description of file: ew.dat
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Bytes Format Units Label Explanations
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1- 15 F15.13 h Time Time of the observations
17- 21 F5.3 0.1nm EW Equivalent width of the selected line
23- 28 F6.4 0.1nm e_EW Errors of the equivalent width measurements
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Byte-by-byte Description of file: spectrum.dat
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Bytes Format Units Label Explanations
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1- 7 F7.2 0.1nm lambda [4401/7552] Wavelength λ (Å)
10- 22 E13.8 cW/m2/nm Flux Flux at λ (erg/cm2/w2Å)
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Acknowledgements:
Cristina Baglio, cristina.baglio(at)brera.inaf.it
(End) Patricia Vannier [CDS] 31-Oct-2014