Everything looks fine to me except there is some unused visibility of a few tens of seconds that I can't quite improve, perhaps because of WFPC fixed exposure times? STScI did a nice job on phase 2. I liked Aladin a lot. Did some doublechecking of coords Aladin shows and they were correct. Also, the ORIENTs were easy to change and to align optimally with the target. By running the schedule tool I could understand the scheduling constraints. Having the software determine the WF-ALL coord with me simply orienting the WFPC on the sky is a very nice feature. Also, I made a lot of use of the help videos StScI had on line. The tutorials were all very clear and saved me a lot of time. Most of this stuff isn't difficult, but you can waste a lot of time trying to figure out the correct sequence of clicks, and the videos solved that problem. ----- Attempting Submission 1 (Tue May 08 20:22:47 GMT 2007) ----- Assigned ID: 398 ----- Attempting Submission 1 (Fri Jan 26 20:48:45 GMT 2007) ----- Dynamics of Clumpy Supersonic Flows in Stellar Jets and in the Laboratory We propose to reobserve three stellar jets in order to quantify how rapidly clumps in these flows accelerate and decelerate, and to compare the results with ongoing numerical simulations and laboratory experiments. Each jet has been imaged twice before with HST, and precise proper motions have been measured for all emitting knots in the jets. Images from the first two epochs show clear differential motions between adjacent clumps, as well as shear, and possibly fragmentation. The proposed third epoch will enable us to measure the first ever accelerations in jets, quantify errors in existing proper motion measurements, and observe in real time how fluid instabilities develop in supersonic flows. The new images will make it possible to compare the behavior of astrophysical flows directly with numerical simulations and with laboratory experiments of bow shocks and clumpy flows in progress at the Omega laser facility.
Observations of three stellar jets in two narrow band filters, H-alpha and [S II]. All images CR-split. HH 34: Oriented to put the jet on WF2 and the bow shock on WF3. 8 orbits total, 4 in each filter. Dither pattern is a box, with one point for each orbit. Do both filters then dither to save overhead. Tweak exposure times in each CR-split to reduce unused visibiility. Note only specific set of exposure times are allowed. HH 47: Spun 180 degrees relative to previous observations. Will miss 47D, but instead get redshifted counterflow. Blue jet is all on WF2. 6 orbits, 3 per filter. Dither is a 3-point line, with one point per orbit. HH1&2: A tight fit owing to other ORIENT constraints. Requires use of WF4 (HH2) and WF2 (HH1). 2 orbits, one per filter. Dither is a 2-point line, one position per orbit. ISM AND CIRCUMSTELLAR MATTER 12 false 0.0 false false false false false false SUPPORTED GALAXY JET EMISSION LINE NEBULA SHOCK FRONT STAR FORMING REGION This object was generated by the targetselector and retrieved from the SIMBAD database. f-line(6563) = 5 +/- 1 e-16 J2000 05 35 31.5000 -06 27 58.00 J2000 GALAXY JET EMISSION LINE NEBULA SHOCK FRONT STAR FORMING REGION This object was generated by the targetselector and retrieved from the SIMBAD database. f-line(6563) = 5 +/- 1 e-16 J2000 08 25 52.5000 -51 00 0.00 J2000 GALAXY JET SHOCK FRONT STAR FORMING REGION EMISSION LINE NEBULA This object was generated by the targetselector and retrieved from the SIMBAD database. 5 +/- 1 e-15 J2000 05 36 23.8000 -06 46 20.00 J2000 WFPC2 Imaging No F673N WFPC2 Imaging No F656N WFPC2 Imaging No F673N WFPC2 Imaging No F656N WFPC2 Imaging No F673N WFPC2 Imaging No F656N POS-TARG DITHER 0.559017 LINE 0.559017 false false 143.130096 4 26.56505 WFPC2-BOX 1 false POS-TARG DITHER 0.3535 LINE false false 3 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