HEAO-1 Pointed Observations

G. J. Fishman writes: "The HEAO-1 spacecraft is scheduled to begin limited pointing operations on Nov. 16. The table below lists the tentative dates for the objects indicated. All pointings will be some time between 15h00m and 24h00m UT and nominally for two orbits (~ 3 hours). During Nov. 16-18 the +y axis will be pointed toward the objects, during Nov. 21-23 the -y axis. At times other than pointing, the spacecraft will be in its normal scanning mode with a period of ~ 35 min. The latest pointing information may be obtained from one of the HEAO-1 investigators or from Dr. Fishman at the address: Code SA, NASA Headquarters, Washington, DC 20546, U.S.A. (telephone 202-755-3616)." Nov. Obj. Remarks Nov. Obj. Remarks 16 SMC X-1 21 SMC X-1 17 Cyg X-1 Binary phase 0 22 Cyg A Strong radio source 18 A 754 Abell cluster 23 PSR 0833-45 Vela Pulsar