Общие вопросы астрономии > Новости наблюдательной астрономии
Возможная вспышка южной Новой!
ctac:
В этом году план по вспышкам Новых уже давно перевыполнен, но их еще все ловят ;)
Возможно, что еще одна вспыхнула в южном полушарии, но на Кавказе и Дальнем Востоке она еще будет доступна для наблюдений.
Координаты: RA=08h 16.2m Dec=-34 15
V=7.0m
Data=2007 11 14.23
Пока данные не подтвержденные.
http://www.cfa.harvard.edu/iau/unconf/cbat_unconf.html
ctac:
Есть вспышка!
IAUC 8895 (2007 Nov. 14)
NOVA PUPPIS 2007
NOVA PUPPIS 2007
Alfredo Jose Serra Pereira, Carnaxide, Portugal, reports his
discovery of an apparent nova (mag 7.0) during his regular visual
patrol on Nov. 14.23 UT with 14x100 binoculars, the position given
as R.A. = 8h16m.2, Decl. = -34o15' (equinox 2000.0); he had nova-
hunted for 625.85 hr since his discovery of the 2001 nova V4740 Sgr
(cf. IAUC 7706). Pereira adds that nothing was detected at this
position in his visual searches during Nov. 6.23, 7.22, 8.23, 10.23,
and 11.22 down to mag about 8; additional monitoring during Nov.
14.243-14.256 also yielded mag 7.0. Following requests by the
Central Bureau, CCD astrometry for the variable has been reported
by J. E. McGaha (Tucson, AZ, U.S.A., 0.62-m f/5.1 reflector) and by
J. Young and H. Rhoades (Table Mountain 0.61-m f/16 Cassegrain
reflector). From his 1-s exposure on Nov. 14.411, McGaha measures
R.A. = 8h16m18s.01, Decl. = -34o15'24".1, red mag 6.5 (USNO-A2.0
reference-star catalogue). From four exposures "in surprisingly
good seeing for the low altitude" on Nov. 14.47-14.48, Young
measures average position end figures 17s.99, 25".0, mag 6.7 in a
red filter (USNO-B1.0 reference-star catalogue); Young also
estimated visual mag 6.4 at this time. Young adds that comparison
with a red image from the Digitized Sky Survey shows only an
extremely faint star (mag about 20) at the same spot as the
apparent nova (located in a fairly empty area surround by "a busy
star field").
ctac:
Вот последние вести о вспышке: http://ooruri.kusastro.kyoto-u.ac.jp/pipermail/vsnet-alert/2007-November/001325.html
AAVSO опубликовало циркуляр: http://www.aavso.org/publications/alerts/alert362.shtml
ctac:
IAUC 8896 (2007 Nov. 15)
V597 PUPPIS = NOVA PUPPIS 2007
N. N. Samus, Institute of Astronomy, Russian Academy of
Sciences, informs us that this nova (cf. IAUC 8895) has been given
the designation V597 Pup. A. J. S. Pereira, Carnaxide, Portugal,
writes that the nova was at visual mag 7.4 on Nov. 15.19 and 15.24
UT.
H. Naito and N. Tokimasa, Nishi-Harima Astronomical
Observatory, report that they obtained a low-resolution spectrum
(range 410-670 nm; resolution 1200 at H_alpha) of V597 Pup on Nov.
14.77 UT with the 2.0-m NAYUTA telescope (+ MALLS). The spectrum
shows broad Balmer lines and Fe II (42 multiplet) with P-Cyg
features, as well as blueshifted absorption lines of Fe II (49, 74),
O I 615.5-615.8 nm, and Si II 634.7-nm. The nova belongs to the Fe
II type and was caught near maximum light. A narrow Na I D
absorption line (EW = 0.3 nm) indicates that some interstellar
reddening exists. The expansion velocities derived from the FWHM
of the Balmer features H_alpha, H_beta, and H_gamma are 1800, 1700,
and 1800 km/s, respectively.
ctac:
Еще: http://www.aavso.org/publications/specialnotice/80.shtml
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