Hi Galina, i've been having some problems with apt...the "auto fill" mode was giving inconsistent results with the previous version of the program, so i re-did the exposures in a different way to allow apt to fill the orbits without errors, and still have multiple exposures for CR removal...Note that all of the subexposures have specified exposure times. I was able to squeeze 2X1200s out of the first target, but only 2X1100s for the second...i think that's about the best that can be done given the quantized WFPC2 exposure times and overheads....let me know if you find any more problems, or if you can think of a way to improve the program. thanks, -tom ----- Submission 1 (Thu Oct 06 17:42:14 GMT 2005) ----- Phase II Proposal 10767 (chan_prop) successfully submitted. ----- Submission 2 (Thu Oct 13 23:02:44 GMT 2005) ----- this is the HST part of a Cycle 7 Chandra program Assigned ID: 1022 ----- Submission 1 (Mon Aug 22 21:41:11 GMT 2005) ----- Phase I Proposal 1022 (chan_prop) successfully submitted. This is a Chandra proposal Further Resolving the Puzzle of Hybrid Star X-rays Do Alpha TrA (K2II) and Beta Ind (K1II) have previously unrecognized X-ray active dwarf companions, leading us astray concerning the coronal properties of the "hybrid-chromosphere" class? Establishing the true X-ray luminosities of the hybrids is a basis for understanding magnetic field generation in evolved supergiants, the driving of their winds, and the seeding of coronal conditions in their extended outer envelopes. It also bears on the issue of late-type dwarfs orbiting main sequence B stars, the evolutionary predecessors of K bright giants. We propose to directly image the putative hybrid companions using Chandra, with supporting observations from HST/WFPC2.
The two targets, both K-type supergiants, will be observed with the WFPC2/F160BW in an attempt to detect close UV-bright companions, thought to be responsible for the anomalous X-ray lproperties. Three HST orbits will be devoted to each star, each visit at a different ORIENT to avoid hiding the companion under a psf artifact. During each visit, six 300 s exposures will be taken, in a 2-pt spatial dither with 3 images at each pointing to mitigate cosmic rays. 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