0 Assigned ID: 683 ----- Attempting Submission 1 (Wed Jan 30 23:35:18 GMT 2019) ----- HST Phase I Proposal 683 (mwc560-2.apt) successfully submitted. Receipt: # 683-1 ----- Attempting Submission 2 (Wed Jan 30 23:54:10 GMT 2019) ----- Our Contact Person is Tony Sohn. The buffer-time for the E230M were updated per suggestion of Tony Sohn. Added ETC exposure IDs for ACQ and STIS E140M and E230M exposures. Other information is still valid. 1006248289 ----- Attempting Submission 1 (Wed Apr 17 20:32:11 GMT 2019) ----- ----- Attempting Submission 2 (Tue Apr 30 20:18:18 GMT 2019) ----- The symbiotic system MWC 560 has the only known spectroscopically observable stellar jet in which we are looking "down the tube" because the jet is oriented directly toward Earth. This orientation, when we take advantage of one of MWC 560's infrequent outbursts to obtain high-resolution UV spectra, offers a unique opportunity to get information about the temperatures, densities, and velocity structure of a stellar jet, probing structures on scales orders of magnitude smaller than can be resolved spatially in any other jet. MWC 560 is having one of the three brightest outbursts in its century-long photometric history. The only other high-resolution UV spectra of MWC 560 were obtained during its 1990 outburst by the IUE satellite. The IUE spectra revealed a rich spectrum of absorption features displaying complext blueshifted absorption up to -6000 km/s with short-timecale variations. These spectra supported a surge of stellar jet modeling. We will obtain UV spectra of MWC 560 using STIS, giving two orders of magnitude improvement over the IUE data in resolution and time sampling. The vastly improved quality of the STIS data will test and constrain the jet models which were based on the lower-resolution IUE data, and probe jet structure on small scales impossible to resolve spatially in any stellar jet by examining a number of features which were too faint and narrow to be used in the IUE data. Stellar jets are considered physically analogous enough that a detailed study of any jet is valuable and applicable to models of all jets from compact stellar remnants to QSOs. This new data set will support a new generation of jet modeling. We will use the E140M and E230M to sample the complex spectrum of the "jet" of MWC560. The spectrum shows long and short timescale variability both in the continuum and in the line profiles that sometimes show velocity displacements up to -6000 km/s. Consequently, we are using the E140M and E230M (centered at 2415 and spanning 2011-2819Ang) in time-tag mode to detect these variations. Of our three orbits, we are devoting 2 orbits to the E140M and 1 orbit to the E230M. Because we want photometric reliability, we are using the 0.2" x 0.2" aperture with no dithering. Based upon a recent very low resolution Swift spectrum ( within the past few weeks) we use a flat continuum with 3.5 to 4.5E-13 ergs/cm^2/s/A in the 2000-2200A region. The continuum has a complex spectrum of strong absorption lines supperposed upon it. We will take multiple 1030 to 1035 sec time-tag exposures with the E140M in two orbits, and 400s exposures with the E230M in the remaining orbit. We stress that this object is an irregular variable. We continue to monitor the AAVSO data. And we will try to obtain another Swift exposure closer to time of the scheduled observations. Fluxes can vary by +/- 50%. Our source is bright. we use buffer times of 100 sec and 467 sec for the E230M and e140M, respectively. To estimate conservative buffer times, we have used an upper limit assuming a constant continnum flux level of 7E-13. The buffer times were derived using the STIS ETC. Previous IUE spectra of MWC560 obtainied in the 1990 outburst, over a range of flux levels, can be found in Michalitsianos et al (1991), ApJ, 371, 761 Stellar Physics 3 false false true false false false false SUPPORTED STAR CIRCUMSTELLAR MATTER INTERACTING BINARY JET M III-I SYMBIOTIC STAR This object was generated by the targetselector and retrieved from the GSC 2.3 database. J2000 STIS/FUV-MAMA Spectroscopic No No E140M 1425 STIS/NUV-MAMA Spectroscopic No No E230M 2415 STIS/FUV-MAMA Spectroscopic No No E140M 1425 1556655291667 The scheduling data was generated by CASM 27.0. CASM was run in Phase II mode. /private/var/folders/mc/xvxbybvd4lx37pqmrmm4r9wh0000gn/T/OPVisit7943758758670331260.xml (Tic-Visit :proposal-id 15700 :visit-id "01" :proposal-version -1 :trans-version "20181130" :date "30-Apr-2019 16:14:49.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 3 :saa-model "24" :si-bright-earth-limb-angle 20.0 :data-volume 2001488 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 15700 :visit-id "01" :obset-id "01" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 15700 :visit-id "01" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2808 :al-overhead-at-end 0 :internal-dur-at-end 178 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3145 :pcs-gap 0 ) (Tic-Orbit :proposal-id 15700 :visit-id "01" :orbit-number 2 :pcs-time 302 :si-vis-utilization 2842 :al-overhead-at-end 0 :internal-dur-at-end 178 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3145 :pcs-gap 0 ) (Tic-Orbit :proposal-id 15700 :visit-id "01" :orbit-number 3 :pcs-time 302 :si-vis-utilization 2836 :al-overhead-at-end 0 :internal-dur-at-end 440 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3145 :pcs-gap 0 ) true 3 0 ACQ for Orbit 1 and E140M Observations. First in a series of two E140M exposures for Orbit 1. ACQ for orbit 2 and the continuation of the E140M exposures ACQ for Orbit 3 and the E230M exposures. First in a series of four E230M exposures One of a series of E230M exposures One of a series of E230M exposures One of a series of E230M exposures