Автор Тема: Новая Стрельца 2005 № 2  (Прочитано 5568 раз)

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Новая Стрельца 2005 № 2
« : 06 Июль 2005, 13:08:26 »
Circular No. 8559

 NOVA SAGITTARII 2005 No. 2
     W. Liller, Vina del Mar, Chile, reports his discovery of an
apparent nova (mag approximately 8.0) on two red photographs taken
on July 4.049 UT (85-mm camera lens + Technical Pan film + deep
orange filter), the new object appearing at R.A. = 18h17m.9, Decl.
= -30o27' (equinox 2000.0); nothing was visible at this location on
films taken by Liller on June 12 (limiting mag about 11.0).  Liller
adds that an unfiltered CCD image taken on July 5.085 shows the
nova at mag 7.2, and that a spectrum taken at July 5.099 shows
H_alpha peaking at about 2.1 times the brightness of the nearby
continuum; its FWHM is approximately 970 km/s, while the expansion
velocity derived from the sharp P-Cyg line is approximately 1300
km/s.
     A. C. Gilmore and P. M. Kilmartin report the following precise
position for the nova from an unfiltered 0.4-s CCD exposure taken
on July 5.380 UT with the 1-m f/3.8 reflector at the University of
Canterbury's Mt. John Observatory (measured by Gilmore using
'Astrometrica' with UCAC2 stars):  R.A. = 18h17m50s.77, Decl. =
-30o26'31".2 (equinox 2000.0).  Photoelectric photometry by
Kilmartin and Gilmore with the 0.6-m f/16 reflector in marginal
conditions (occasional fog and low cloud crossing) yields:  July
5.408, V = 8.15, U-B = -0.04, B-V = +0.48, V-R = +0.38, V-I = +0.75,
air mass 1.167; 5.456, 8.17, +0.03, +0.46, +0.33, +0.67, 1.064
(comparison star Cousins' E749).  Attempts to identify a precursor
star on the Digitized Sky Survey were unsuccessful; a 15th-mag star
that is near the nova position, but too far off to be a likely
precursor, hides fainter stars.
     C. Jacques, Belo Horizonte, Brazil, reports the following
position end figures for the nova (whose unfiltered magnitude was
7.9) from CCD astrometry obtained on July 5.1 UT with a 0.30-m
reflector:  50s.79, 32".4.
     Visual magnitude estimates, in part via E. Waagen, AAVSO:
July 5.014 UT, 7.6 (R. Shida, Sao Paulo, Brazil); 5.271, 8.0 (M.
Linnolt, Woodside, CA); 5.359, 8.0 (J. Bedient, Hololulu, HI);
5.438, 8.1 (A. Pearce, Nedlands, W. Australia).

 5 июля
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Re: Новая Стрельца 2005 № 2
« Ответ #1 : 06 Июль 2005, 13:11:43 »

 Поисковая карта: http://www.aavso.org/charts/SGR/NSGR05_2/NSGR05_2-D.PNG

 И сообщение на сайте AAVSO: http://www.aavso.org/publications/alerts/alert320.shtml
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Re: Новая Стрельца 2005 № 2
« Ответ #2 : 03 Август 2005, 22:18:05 »
Циркуляр IAUC №8579

V5116 SAGITTARII
     R. W. Russell, D. K. Lynch, and R. J. Rudy, The Aerospace Corporation, report 0.8-2.5-micron spectroscopy of V5116 Sgr on July 15 UT using SpeX at the Infrared Telescope Facility.  The nova showed emission lines of H I, He I, C I, N I, Ca II, and O I with FWHM about 2200 km/s.  P-Cyg profiles were observed on the He I lines at 1.0830 and 2.0581 microns.  There was no evidence of thermal emission from dust.
     Additional visual magnitude estimates (cf. IAUC 8561):  July9.892 UT, 9.4 (A. Kammerer, Malsch, Germany); 12.93, 9.3 (J.Carvajal, Madrid, Spain); 30.91, 10.6 (J. G. de S. Aguiar,Campinas, Brazil).

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