From VBOG@srdlan.npi.msu.su Tue Feb 22 12:32:44 2000 Return-Path: Received: from satty.npi.msu.su (satty.npi.msu.su [158.250.20.4]) by xray.sai.msu.su (8.9.3/8.9.3) with ESMTP id MAA15388 for ; Tue, 22 Feb 2000 12:32:43 +0300 Received: from king.npi.msu.su (king.npi.msu.su [158.250.20.11]) by satty.npi.msu.su (8.9.3/8.9.3) with ESMTP id MAA16855 for ; Tue, 22 Feb 2000 12:32:39 +0300 (MSK) (envelope-from VBOG@srdlan.npi.msu.su) Received: from KING/SpoolDir by king.npi.msu.su (Mercury 1.43); 22 Feb 100 12:37:58 +0300 Received: from SpoolDir by KING (Mercury 1.43); 22 Feb 100 12:37:33 +0300 From: "Vitaliy Bogomolov" Organization: SINP MSU To: polar@xray.sai.msu.su Date: Tue, 22 Feb 2000 12:37:28 MSK-3MSD MIME-Version: 1.0 Content-type: text/plain; charset=US-ASCII Content-transfer-encoding: 7BIT Subject: BH-2000 Reply-to: VBOG@srdlan.npi.msu.su Priority: normal X-mailer: Pegasus Mail v3.30 Message-ID: <318C465C4E@king.npi.msu.su> Status: RO Dear collegues, If it is not too late, please, include our 10 min report into BH-2000 colloquium program: PERIODIC PROCESSES IN HARD RADIATION OF X-RAY NOVAES: RESULTS OF PROGNOZ_9 OBSERVATIONS AND PERSPECTIVES OF MIR-SPECTR DATA PROCEEDING V.V.Bogomolov, M.I.Kudriavtsev, S.I.Svertilov Periodic components in hard X-rays (10-200 keV) from some objects near the Galactic Center were discovered in the experiment during Prognoz-9 mission. The period values lay in the range from several hours to several days. 6 of 13 periodic processes were identified with known X-ray binaries. Among them are 4 x-ray novaes: H1705-25 (Nov Oph 1977) - 152 h, GRO J1655-40 - 62 h, 4U1543-47 - 13.3 h and Cen X-4 - 8.2h., first 3 of them are BH ones. The common property of all detected processes is the complicated form of mean light curves. The energy spectra of periodic components are hard up to kT>40keV for 152h periodicity. The properties of unidentified periodic components are similar, so some of them may also have BH novae nature. The 2 year data of hard x-ray instrument in GRIF-1 experiment onboard MIR-SPECTR gives the future perspectives in X-ray novaes investigations.