Central Bureau for Astronomical Telegrams
IAUC 4362: N Cir 1987; IRAS 1211+03; N Her 1987
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Circular No. 4362
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
NOVA CIRCINI 1987
S. A. Ilovaisky, Observatoire de Haute Provence; H. Pedersen,
European Southern Observatory; and M. van der Klis, EXOSAT Observatory,
report: "Analysis of CCD photometry of the optical counterpart
of the Ginga x-ray nova 1354-64 (Pedersen et al., IAUC 4357),
obtained with the Danish 1.54-m telescope at La Silla between Mar.
29 and Apr. 1, reveals that the brightness variations we observed
are consistent with a 46-hr periodic modulation of 0.3-0.4 mag
amplitude in V and a secular decrease in brightness by 0.04 mag/day.
Further observations obtained during the following week with the
1.54-m and ESO 3.6-m telescopes show that the brightness decrease
has probably steepened. Our last measurement on Apr. 7 UT gives V
= 17.5. Further spectroscopic observations with the ESO 3.6-m
telescope on Apr. 6 and 7 show the appearance of H-alpha and H-beta
in emission. Observers are urged to monitor the object."
IRAS 1211+03
I. Kazes, Observatoire de Paris, Meudon; I. F. Mirabel, Instituto
de Astronomia y Fisica del Espacia, Buenos Aires, and University
of Puerto Rico; and D. B. Sanders, California Institute of
Technology, report: "OH maser emission (nonrelativistic recession
velocity of 21 780 km/s) was discovered in the galaxy IRAS 1211+03
(distance 290 Mpc, assuming H = 75 km/s/Mpc) with the Nancay radio
telescope, and H I absorption was found with the Arecibo radio telescope.
The isotropic luminosity at 1667 MHz is 830 solar luminosities (L_o)
and the line-intensity ratio of 1667 to 1665 MHz is > 7. The H I spectrum
displays a broad absorption feature of several hundred km/s; the
peak absorption is at the same velocity as the OH emission. CO
emission was detected using the 12-m radio telescope of the National
Radio Astronomy Observatory at Kitt Peak. Among the ultraluminous
IRAS galaxies, 1211+03 is the second most luminous galaxy after
Markarian 231, with L(8-1000 microns) = 1.94 x 10E12 L_o (Soifer 1987,
Infrared Processing and Analysis Center preprint no. 24).
NOVA HERCULIS 1987
Visual magnitude estimates (cf. IAUC 4331): Mar. 4.13 UT, 9.8
(P. Schmeer, Bischmisheim, West Germany); 6.10, 9.9 (Schmeer);
6.18, 9.7 (E. Wunder, Ruckersdorf, West Germany); 9.07, 10.0
(Schmeer); 15.16, 10.0 (A. Pereira, Linda-A-Velha, Portugal).
1987 April 10 (4362) Daniel W. E. Green
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