Search Publications
Search for outbursts in the narrow 511-keV line from compact sources based on INTEGRAL data
Tsygankov, S. S.; Churazov, E. M.
We present the results of a systematic search for outbursts in the narrow positron annihilation line on various time scales (5 × 104-106 s) based on the SPI/INTEGRAL data obtained from 2003 to 2008. We show that no outbursts were detected with a statistical significance higher than ∼6 σ for any of the time scales considered o…
New fast X-ray transient IGR J18462-0223 discovered by the INTEGRAL observatory
Sunyaev, R. A.; Grebenev, S. A.
Details of the discovery of a new X-ray source, IGR J18462-0223, on October 12, 2007, during a short (several hours), intense (∼35 mCrab at the peak) outburst of hard radiation by the IBIS/ISGRI gamma-ray telescope onboard the INTEGRAL observatory are given. The detection of another earlier outburst from this source occurred on April 28, 2006, in …
Star formation history in the central region of the barred galaxy NGC 7177
Sil'Chenko, O. K.; Smirnova, A. A.
Using the method of two-dimensional spectroscopy, we have investigated the kinematics and distribution of the gas and stars at the center of the early-type spiral galaxy NGC 7177 with a mediumscale bar as well as the change in the mean age of the stellar population along the radius. A classical picture of radial gas inflow to the galactic center a…