Central Bureau for Astronomical Telegrams
IAUC 4629: N And 1988; TWO NEW OH MEGAMASERS
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Read IAUC 4630
Circular No. 4629
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Postal Address: Central Bureau for Astronomical Telegrams
Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
TWX 710-320-6842 ASTROGRAM CAM Telephone 617-495-7244/7440/7444
MARSDEN or GREEN@CFA.BITNET MARSDEN or GREEN@CFAPS2.SPAN
NOVA ANDROMEDAE 1988
R. A. Wade, Steward Observatory, University of Arizona, writes:
"Spectroscopic observations were obtained of this object using a
CCD on the Steward Observatory 2.3-m telescope. A medium-resolution
spectrogram covering 368-517 nm (obtained July 9.45) shows broad
absorption at H-beta (FWZI = 8000 km/s) upon which is superposed strong
emission (equivalent width 2.5 +/- 0.3 nm, full width at base = 3500
km/s) that is itself reversed at the peak (separation between peaks
= 1000 km/s). Similar absorption and emission structure is visible
at H-gamma. No CLEAR emission is seen at 500.7 nm, 468.6 nm, or 372.7 nm.
Low-dispersion spectrograms were obtained under adverse weather
conditions (clouds and lightning) on July 13.44 (covering 575-869
nm) and July 13.46 (315-607 nm). They show H-alpha emission with equivalent
width 10 +/- 1.5 nm, FWZI = 3000 km/s, emission peak separation =
900 km/s; H-beta emission with equivalent width 4 +/- 1 nm, FWZI = 3500
km/s, peak splitting = 1400 km/s; and [O II] 372.7 nm emission
with equivalent width about 3 nm (probably not doubled). Again, no [O
III] 500.7 nm emission is apparent, nor is O I 844.6 nm emission.
Further broad emission features may be present but require additional
analysis to be confirmed. The spectra are reminiscent of the recurrent
nova WZ Sge at minimum light. CCD photometry by D. Hamilton with the
2.1-m Kitt Peak reflector on July 9.5 gave B about 18.8, Kron R about 18.3;
no other object not on the Palomar Sky Survey is visible, suggesting
that Hurst's (IAUC 4620) object is indeed the pre-nova."
TWO NEW OH MEGAMASERS
I. Kazes, Observatoire de Paris, Meudon; I. F. Mirabel, Instituto
de Astronomia y Fisica del Espacia, Buenos Aires, and University of
Puerto Rico; and F. Combes, Observatoire de Paris, Meudon, telex: "OH
megamaser and H I emissions were discovered in the galaxies IRAS
0005+40 and IRAS 1003-33 with the Nancay radio telescope. The H I
masses of these galaxies are well above those of luminous infrared
galaxies. The OH emission in IRAS 1003-33 reveals several bright
individual megamasers, as narrow as 15 km/s FWHM, one of which is
shifted in velocity by 120 km/s with respect to the brightest one.
Physical characteristics of the two sources are: IRAS 0005+40,
L(1667)/L(sun) = 90, I(1667)/I(1665) = 1.8, log M(H I)/M(sun = 10.65,
10E11 L(60 microns)/L(sun) = 1.52; IRAS 1003-33, 380, > 20.0, 10.00, 1.74."
1988 July 18 (4629) Daniel W. E. Green
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