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J/MNRAS/308/473 Cygnus X-3 IR spectra (Fender+, 1999)
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Infrared spectroscopic variability of Cygnus X-3 in outburst and quiescence.
Fender R.P., Hanson M.M., Pooley G.G.
<Mon. Not. R. Astron. Soc. 308, 473 (1999)>
=1999MNRAS.308..473F (SIMBAD/NED BibCode)
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ADC_Keywords: Binaries, X-ray ; Spectra, infrared
Keywords: binaries: close - stars : individual : Cygnus X-3 -
circumstellar matter - infrared : stars
Description:
We present four epochs, A, B, C and D, of resolution
({lambda}/{delta}{lambda}) = 1200, 2.12 micron spectroscopy of the
peculiar X-ray binary Cygnus X-3. About a half dozen spectra taken
with resolution 900, and at 1.62 micron are also included. These data
were obtained using the FSpec near-infrared spectrometer (Williams,
D., Thompson, C.L., Rieke, G.H., Montgomery, E. 1993, Proc. SPIE 1308,
482) on the Multiple Mirror Telescope (MMT). The MMT is located at an
elevation of 2600 m at the top of Mt. Hopkins in southern Arizona and
is jointly operated by the Smithsonian Astrophysics Observatory and
the University of Arizona.
The spectra are stored as ascii files, listing wavelength in Angstroms
and relative flux. Each file contains a five line header, giving the
UT, Heliocentric Julian date and phase of the X-ray system at the
start of the integration, followed by the data points. Additional
information about the spectra can be obtained in the paper.
Objects:
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RA (2000) DE Designation(s)
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20 32 26.6 +40 57 09 Cyg X-3 = V1521 Cyg = H 2030+407
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 69 111 Description of Cyg X-3 ascii spectra
sp/* . 111 Individual spectra in ascii format
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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- 11 A11 --- File Spectrum file name in subdirectory sp
13- 20 A8 "DD/MM/YY" OBSdate Start of exposure
22- 23 I2 h OBSh Observation time
24 A1 --- --- [:]
25- 26 I2 min OBSm Observation time
27 A1 --- --- [:]
28- 29 I2 s OBSs Observation time
31- 46 F16.8 d HJD Heliocentric Julian date
48- 54 A7 --- Exp Exposures (1)
56- 68 F13.7 --- Phase Phase (2)
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Note (1): Exposures defined as offsets
in slit x sampled spectra x integration time per spectrum in seconds
Note (2): Phases represents start of exposure, using ephemeris of
Kitamoto et al. (1995PASJ...47..233K)
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Structure of files: sp/*
Each file starts by a header made of 5 lines, including UT,
Heliocentric Julian date and Phase, and the column headers.
The remaining lines contain the data points as a 2-column data table
(format F12.1,F16.9)
Acknowledgements: Margaret M. Hanson <hanson@physics.uc.edu>
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(End) Patricia Bauer [CDS] 02-May-1999