CCD%20monitoring%20of%20faint%20eclipsing%20binaries

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CCD fotometrie zákrytových dvojhvezd
Miloslav Zejda
Seminár Astronomického ústavu UK, 19. brezna 2003
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Fáze projektu

1. získání fotometrických dat ze CCD pozorování
2. výber astrofyzikálne zajímavých dvojhvezd
3. spektroskopická pozorování?
4. rešení svetelné krivky - výpocet modelu
5. publikace

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RL400 Nasmyth s fotometrem (1996)
RL400 Newton se CCD SBIG ST 7 (2001)
Newton, primar,Cassegrain/Ritchey-Crétien,Coudé/Na
smyth
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Redukcní software - Munipack Autori Filip
Hroch, Rudolf Novák, Lukáš Král Inspirace - ESO
MIDAS, PC Vista (Treffers Richmond
(1989)) Založen na DAOPHOTu (P. B. Stetson
(1987)) OS DOS/Win, Linux/Unix Možnosti -
poloautomatické zpracování sady snímku -
konverze do FITS - fotometrie všech hvezd na
snímcích - automatický flat field - fotometrie
pohybujících se objektu Doplnky Varfind (Král)
procedura pro hledání nových promenných
hvezd - Symb_soft (Pejcha) automatické
zpracování rady nocí - Absolut (Brož)
procedury pro absolutní fotometrii - xebm (Brož)
grafické rozhraní pro Linux, minima promenných
hvezd
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• Soucasné výsledky
• - pozorování nekolika set promenných hvezd
• - cca 7 GB dat tj. 26000 snímku
• astrometrie promenných hvezd (zpresnené
  souradnice)
• informace o svetelných zmenách, svetelné krivky
• pozorování opomíjených, nesledovaných promenných
  hvezd
• - nové promenné hvezdy
• - publikace IBVS, Práce HaP MK Brno, katalog
  BRKA

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BRno KAtalog (catalogue) 2002

• N. Copernicus Observatory and Planetarium, Kraví
  hora 2, 616 00 Brno, Czech Republic
• Miloslav Zejda (zejda_at_hvezdarna.cz)
• B.R.N.O. Catalogue of Eclipsing Binaries
• BRKA 2002 (Basic)
• Version 1.1
• The catalogue contains basic data about eclipsing
  variable filed in the observational programme of
  B.R.N.O. Variable Star Section of Czech
  Astronomical Society. Light elements given here
  serves also for predictions of times of minima
  available at N. Copernicus Observatory and
  Planetarium Brno or through web page
  http//var.astro.cz/brno.
• Introduction
• Before 1999 the catalogue contained only seven
  hundreds of short period eclipsing binaries with
  known light elements. That year the main (basic)
  catalogue was enlarged practically twice and two
  new catalogues were created. The first one is
  devoted to eclipsing binaries without known light
  elements. It was named (BRKA 1999) Prospector for
  observers of such type of variable stars are
  often in the same position as adventures
  prospecting gold nuggets in heaps of rubbish. The
  project Prospector (and the pertinent catalogue
  as well) was adopted by Michal Haltuf this year.
  The second new catalogue created in 1999
  contained data on two hundreds eclipsing binaries
  with eclipses of long duration. Unfortunately,
  this BRKA 1999 L(ong) has not been not updated up
  to now and it is still waiting for a new manager.
• All catalogues are available upon request at N.
  Copernicus Observatory and Planetarium Brno or
  free through http//var.astro.cz/brno.
• The present basic catalogue BRKA 2001 contains
  1488 records of 1444 stars amplitudes of light
  changes of which are larger then approximately
  0.5 mag. In comparison with its contiguous issue
  it presents revised light elements of 532
  eclipsing binaries, the further 24 corrections
  concern to

• secondary minima of stars. 61 variable stars were
  added (in 2 cases are given light elements for
  secondary minima, too).
• Acknowledgement
• Author of the catalogue thanks especially to F.
  Agerer, M. Haltuf, Z. Mikulášek, A. Paschke, J.
  Šafár, V. Šimon, M. Wolf for their help and
  providing of valuable data and literature.
• The following sources of data were used
• ADS (Astrophysics Data System Article Service,
  NASA) http//cdsads.u-strasbg.fr/ads_articles.htm
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• BAV (Bundesdeutsche Arbeitsgemeinschaft für
  Veränderliche Sterne e.V.) http//www.var-mo.de
• BBSAG (Bedeckungveränderlichen Beobachter der
  Sweizerischen Astronomischenv Gesellschaft)http//
  www.astroinfo.ch/bbsag/bbsag.html
• GCVS (General Catalogue of Variable
  Stars) http//www.sai.msu.su/groups/cluster/gcvs/g
  cvs
• Hipparcos Catalogue http//astro.estec.esa.nl/Hipp
  arcos
• IBVS (Information Bulletin on Variable
  Stars) http//www.konkoly.hu/IBVS/IBVS.html
• SAC (Rocznik Astronomiczny Obserwatorium
  Krakowskiego)http//www.oa.uj.edu.pl/ktt/rcznk.htm
  l
• Simbad Astronomical Database (CDS, Strasbourg,
  Francie) http//simbad.u-strasbg.fr/Simbad
• VSNET http//www.kusastro.kyoto-u.ac.jp/vsnet
• Appeal
• The author of the catalogue and at the same time
  the manager of the database tried to use all
  available information about given stars during
  last several years. Unfortunately, not all
  relevant information has been in his disposal. If
  you know both from your own observation and from
  literature new

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Opomíjené hvezdy
V 784 Aql
a20h07m07.1s d132959 (2000.0) Mo 29108.388
P0.457394 (GCVS) Mo 51467.3833 P0.587694
(BRKA) 14.2-14.8 mag (P) W UMa typ
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Nesledované hvezdy
V 789 Her
Soucasný stav a17h05m43.1s d423102
(2000.0) Mo 51679.4219 P 0.3200554 d amplituda
0.6 mag (R)

• Pred monitorováním
• svetelné elementy neznámy,
• typ W UMa
• 14.6-15.6 mag (P)

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Nové promenné hvezdy
GSC 23360281 Tri
a02h41m41.0s d354254 (2000.0) Mo
51550.3065 P0.3742 13.55-14.13 mag (P) typ W
UMa
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TU CrB
a16h09m39.7s d393513 (2000.0) 12.6-13.6
mag (P) D? h, d? h M052139.4019 P1.6136929
d zjišteno O-C-11.5 h (GCVS)
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PY Lyr
a19h20m26.0s d285647 (2000.0) 12.5-13.5
mag (P) M051663,5696 P0.38577770 d typ W UMa
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KV Gem
a06h47m12.2s d154317 (2000.0) Mo 31028.619
P0.2185467 (GCVS) Mo 47872.914 P0.43713
(AJ 102,1991) Mo 51786.534 P0.358519
(BRKA) 12.2-12.63 mag (V) typ W UMa
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KV Gem Nightfall
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KV Gem Nightfall preliminary results
System Parameters (circular orbit) ltInclinationgt
85.000 (degree) ltMass Ratiogt 0.383
(dimensionless) ltLagrange Onegt 0.597
(dimensionless)
System Size ltPeriodgt 0.359
(days) ltTotal Massgt 2.000 (solar
mass) ltDistancegt 2.675 (solar
radius) ltLagrange Onegt 1.597 (solar radius)
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Component Parameters Primary Secondary ltMax
Velocitygt 104.156 272.019 (km/sec)
ltMassgt 0.723 0.277
(dimensionless) ltPolar Radiusgt 0.444
0.287 (dimensionless) ltMassgt
1.446 0.554 (solar mass) ltPolar Radiusgt
1.188 0.769 (solar radius) ltMean Temp.gt
6871.6 7136.5 (Kelvin) ltFill Factorgt
1.018 (dimensionless) ltTemperatu
regt 7252.0 7772.7 (Kelvin) ltAsynchronic
itygt 1.000 1.000 (dimensionless) ltAlbedo
gt 1.000 1.000 (dimensionless) ltG
rav. Dark.gt 0.250 0.250
(dimensionless) ltSurface Potential Primarygt
2.6015 (dimensionless) ltLagrange 1
Potentialgt 2.6430
(dimensionless) ltLagrange 2 Potentialgt
2.4086 (dimensionless) ltFillout Factorgt
0.1772 (dimensionless) ltSurface
Potential Secondarygt 5.9883
(dimensionless)
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KV Gem predbežný model (Binary Maker 2.0)
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V 361 Lyr

• P 0.309614 d (7.5 h),
• V 13.7-14.9 mag
• Objev - C. Hoffmeister (1966) typ RR Lyr
• poté rada studií Galkina Shugarov (1985),
  Andronov Richter (1987) , Hegedüs (1988), J.
  Kaluzny (1990, 1991), Shugarov et al. (1990),
  Nations et al. (1994), Gray et al. (IBVS, 1995)
• Poslední detailní studie Hilditch, Collier
  Cameron, Hill, Bell, Harries(MNRAS 291, 1997,
  749)

Pozorování provádena v Brne a Ondrejove
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V 361 Lyr - parametry

• spektrální trída F8 - G0
• q m2 / m1 0.694 (urcen spektroskopicky)
• T1 6200 K, T2 4500 K
• horká skvrna T 10 000 K na sekundární složce
• d 520 pc,
• E(B -V) 0.43
• Min 44523.3088 0.30961493 E - 3.97 10-11
  E2

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V361 Lyr Nightfall
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To je všechno, prátelé.
Ale jen pro dnešek
Dekuji vám za pozornost.
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V919 Aql
a19h22m55.7s d-010232 (2000.0) Mo
50667.42432 P0.79520970 0.00019
0.00000003 13.0-14.0 mag (P) sec.13.8
mag typ b Lyrae
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