J/A+A/584/A40 2MASS J22560844+5954299 spectra (Kjurkchieva+, 2015)
2MASS J22560844+5954299: the newly discovered cataclysmic star with the deepest
eclipse.
Kjurkchieva D., Khruzina T., Dimitrov D., Groebel R., Ibryamov S.,
Nikolov G.
<Astron. Astrophys. 584, A40 (2015)>
=2015A&A...584A..40K 2015A&A...584A..40K (SIMBAD/NED BibCode)
ADC_Keywords: Binaries, eclipsing ; Spectra, red
Keywords: binaries: eclipsing - stars: individual: 2MASS J22560844+5954299 -
novae, cataclysmic variables - white dwarfs -
accretion, accretion disks
Abstract:
The SW Sex stars are assumed to represent a distinguished stage in CV
evolution, making it especially important to study them.
We discovered a new cataclysmic star and carried out prolonged and
precise photometric observations, as well as medium- resolution
spectral observations. Modelling these data allowed us to determine
the physical parameters and to establish its peculiarities.
To obtain a light curve solution we used model whose emission sources
are a white dwarf surrounded by an accretion disk with a hot spot, a
gaseous stream near the disk's lateral side, and a secondary star
filling its Roche lobe. The obtained physical parameters are compared
with those of other SW Sex-subtype stars.
Description:
The spectral observations of 2MASS J22560844+5954299 were carried by
the 2m RCC telescope equipped with the focal reducer FoReRo 2 and
grism with 720-lines/mm. The resolution of the spectra is 2pix or
2.7Å; and they cover the range 5600-7000Å. Most of the spectra
have a S/N of 16-22 excluding those at the eclipse where the S/N
value is around 7. The spectra were reduced using IRAF packages for
bias subtraction, flat-fielding, cosmic ray removal, and
one-dimensional spectrum extraction.
Objects:
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RA (2000) DE Designation(s)
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22 56 08.44 +59 54 30.0 J2256 = 2MASS J22560844+5954299
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
list.dat 89 22 List of fits spectra
sp/* . 22 Individual fits spectra
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Byte-by-byte Description of file: list.dat
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Bytes Format Units Label Explanations
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1- 4 I4 --- Nx Number of measurements
6- 15 A10 "DD/MM/YYYY" Obs.date Observation date
17- 24 A8 "h:m:s" Obs.time Time of observation
26- 29 I4 0.1nm blambda Lower value of wavelength interval
31- 34 I4 0.1nm Blambda Upper value of wavelength interval
36 I1 0.1nm dlambda Wavelength resolution
38- 39 I2 Kibyte size Size of the file
41- 49 A9 --- FileName Name of the fits file in subdirectory sp
51- 89 A39 --- Title Title of the fits file
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Acknowledgements:
Diana Kjurkchieva, kyurk(at)shu-bg.net
(End) Patricia Vannier [CDS] 04-Nov-2015