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IAUC 5605: N Sgr 1992 No. 2; N Cyg 1992; 1992 QN

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                                                  Circular No. 5605
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Postal Address: Central Bureau for Astronomical Telegrams
Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
Telephone 617-495-7244/7440/7444 (for emergency use only)
TWX 710-320-6842 ASTROGRAM CAM     EASYLINK 62794505
MARSDEN@CFA or GREEN@CFA (.SPAN, .BITNET or .HARVARD.EDU)


NOVA SAGITTARII 1992 No. 2
     G. S. Rossano, R. J. Rudy, R. C. Puetter and D. K. Lynch, Space
and Environment Technology Center, The Aerospace Corporation, report:
"Observations of Nova Sgr 1992-2 have been obtained using the cooled
Aerospace near-infrared scanning germanium spectrometer with a 10" x
8" oval aperture on the 3-m Shane telescope of the Lick
Observatory.  Spectroscopic observations were made in the wavelength
interval 0.75 to 1.35 microns at a resolution of 300-550.  The unusual
spectrum is dominated by neutral oxygen at 844.6 and 1128.7 nm
excited by the Ly beta flourescence mechanism.  Moderate O I at
777.4 nm, 1316.4 nm and other weaker neutral oxygen lines were also
detected.  Moderately strong Paschen beta through epsilon and weak He
I 1083.0 nm were also present.  The spectrum possesses numerous
moderate and weak lines of neutral nitrogen.  Weak neutral carbon
lines may also be present.  Several lines remain unidentified.  We do
not confirm the presence of the infrared Ca II triplet but instead
identify a blend of nitrogen lines in that wavelength interval.  The
nova was observed on the four nights Aug. 16.2, 17.2, 18.3 and 20.3
UT, a 25-percent decrease in brightness being detected over this time
interval.  A monochromatic magnitude of 8.9 at 1.25 microns was
observed on Aug. 20.3 UT."


NOVA CYGNI 1992
     G. S. Rossano et al. also report that Nova Cyg 1992 was observed
in the same manner as Nova Sgr 1992-2 on Aug. 16.4, 17.4 and 20.4 UT.
It was observed to be more typical in appearance, with strong lines of
the Paschen series and strong He I 1083.0 nm, along with other lines
of He I, He II, O I, [O II], [Ar III], [N I], [S II], [S III] and [P
II].  A monochromatic magnitude of 8.4 at 1.25 microns was observed on
Aug. 20.4 UT.
     Unfiltered CCD magnitudes by W. Liller, Vina del Mar, Chile:
Aug. 22.99 UT, 7,91; 24.02, 8.04, 30.98, 8.89, 31.98, 8.77.  Comparison
star SAO 227635, mag 8.10.


1992 QN
     Corrigendum.  On IAUC 5602 the discoverers should be listed
as E. F. Helin and J. Alu.


1992 September 5               (5605)              Brian G. Marsden

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