Central Bureau for Astronomical Telegrams

Central Bureau for Astronomical Telegrams -- Image credits

IAUC 3363: SS 433; HM Sge; NOVALIKE OBJECT IN Vul

The following International Astronomical Union Circular may be linked-to from your own Web pages, but must not otherwise be redistributed (see these notes on the conditions under which circulars are made available on our WWW site).

Read IAUC 3362 SEARCH Read IAUC 3364
IAUC number 

                                                  Circular No. 3363
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 617-864-5758


SS 433
     I. S. Glass, South African Astronomical Observatory, reports
that JHKL observations by B. S. Carter and himself four times in
1978 Aug. and twice in early 1979 May show that SS 433 has a definite
infrared excess and variability.  Average K ~ 8.12; range in
K is 0.8 magnitude.  Average J-H = +0.62.  Average H-K = +0.70.
Measures in 1979 May only gave K-L = +0.71 for H-K = +0.64 and J-H
= +0.66.

     J. McGraw, S. Starrfield, R. Angel and N. Carleton report that
high-speed photometry with 1-s and 3-s integrations was performed
on Apr. 28 and 29 using the Smithsonian Astrophysical Observatory's
Multiple-Mirror Telescope on Mt. Hopkins.  They find no evidence
for periodic signals in their data, with upper limits of 0.003
magnitude in the period range 2-350 s and 0.006 magnitude in the range
350-500 s.  On timescales of 350 s to more than 10 min, they find
no evidence for variations, with a definite upper limit of 0.1
magnitude.  Finally, they observe no low-frequency noise (flickering)
similar to that observed in close binaries with accretion disks.
This implies that on these nights there was no occurrence of mass
transfer into an accretion disk on the time and space scales
observed in the case of the cataclysmic variables.


HM SAGITTAE
     W. A. Feibelman, Goddard Space Flight Center, reports that
image-tube spectrograms (range 3700-7300 A, dispersions 82 and 41
A/mm) taken on Apr. 29, 30 and May 8 by A. Mallama and L. Brown
with the 91-cm reflector show several changes in the emission-line
spectrum of HM Sge relative to spectrograms taken on 1978 Apr. 15
by R. Hobbs.  Microdensitometer tracings show that the [Ne III]
3868 A line is now about three times as strong as H-beta 3889 A, the
[O III] 4363 A line is now stronger than H-gamma 4340 A, the [O III] 5007 A
line is now considerably stronger than H-beta 4861 A, and the broad
Woif-Rayet feature at 4650-4700 A is now weaker than it was a year
ago.


NOVALIKE OBJECT IN VULPECULA
     Visual magnitude estimate by J. Bortle, Brooks Observatory:
May 2.18 UT, 8.8.


1979 May 23                    (3363)              Brian G. Marsden

Read IAUC 3362 SEARCH Read IAUC 3364

Our Web policy. Index to the CBAT/MPC/ICQ pages.

Valid HTML 4.01!