Sziasztok!
Az IAU Circular 9120. szama szerint a Nova Sco 2010 hivatalos neve:
V1310 Sco.
* * *
V1310 SCORPII = NOVA SCORPII 2010
As first announced on CBET 2183, K. Nishiyama (Kurume, Fukuoka-
ken, Japan) and F. Kabashima (Miyaki-cho, Saga-ken, Japan) reported
the discovery of a possible nova (mag 10.5) on two unfiltered CCD
frames taken around Feb. 20.857 UT using a 105-mm f/4 camera lens
(+ SBIG STL6303E camera); they confirmed the appearance of the new
object at mag 10.3 on six unfiltered CCD frames taken around Feb.
21.832 (and mag 10.7 on Feb. 22.846) using a Meade 0.40-m reflector
(+ SBIG STL1001E camera), from which they measured the following
precise position: R.A. = 17h06m07s.53, Decl. = -37o14´27".4
(equinox 2000.0). Nothing is visible at this position on two past
survey frames taken on 2009 Sept. 18.425 (limiting mag 13.6) and
Oct. 3.414 (limiting mag 12.3), or on a Digitized Sky Survey (DSS)
plate from 1997 Apr. 2.8 (limiting red mag 18.0). Following
posting on the Central Bureau´s unconfirmed-objects webpage, other
observers have reported observations of the new variable. S.
Kiyota (Tsukuba, Japan; remotely using a Global-rent-a-scope 32-cm
reflector + SBIG ST-10XE CCD camera located at Moorook, South
Australia) reports position end figures 07s.51, 26".9 and the
following magnitudes: Feb. 22.701, V = 12.03; 22.702, B = 13.09;
22.703, R_c = 10.70; 22.705, I_c = 9.65. Kiyota adds that nothing
is visible at this position on a V-band Digitized Sky Survey plate
from 1988 Apr. 14 (no limiting magnitude provided). E. Guido and
G. Sostero also imaged this object remotely through a 0.40-m
reflector from the GRAS Observatory at Moorook on Feb. 22.8,
yielding position end figures 07s.50, 27".7 and unfiltered CCD mag
about 10.1. W. Vollmann, Vienna, Austria, reports the following
green (approximately visual) magnitudes for the variable from DSLR
images taken with a 0.60-m f/3.5 reflector by H. Koberger,
Vilaflor, Tenerife: Feb. 24.279, 12.3; 25.254, 12.4. Koberger
adds that low-resolution spectra (grating 100 lines/mm) taken
around the same times clearly show strong H_alpha emission.
K. Ayani, Bisei Astronomical Observatory (BAO), writes that a
low-resolution spectrum (range 400-800 nm; resolution 0.5 nm at
H_alpha) of the new variable, obtained with the BAO 1-m telescope
on Feb. 23.88 UT, shows prominent H_alpha emission (FWHM about 1800
km/s; equivalent width 70 nm) with P-Cyg absorption upon a red
continuum; the absorption bottom is blueshifted by 1600 km/s with
respect to the emission peak. The spectrum also shows emission
lines of H_beta and Fe II (multiplet 42), which are weak and
probably due to large interstellar extinction. These features
suggest that the new object is a "Fe II"-type nova.
E. Kazarovets and N. N. Samus report that the GCVS designation
V1310 Sco has been assigned to this nova.
(C) Copyright 2010 CBAT
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Fidusz (FIDRICH Robert)
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