15700( 4) - 01-May-2019 14:12:14 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 15700 Version: 4 Check-in Time: 01-May-2019 14:12:14 STScI Edit Number: 1 Title Down the Tube: A 21st Century Study of a Unique Stellar Jet ------------------------------------------------------------------------------------ Type Cycle GO 26 ------------------------------------------------------------------------------------ Investigators Contact? PI: Dr. Frederick C. Bruhweiler American University Y CoI: Mr. Bruce McCollum American University Y ------------------------------------------------------------------------------------ Abstract 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. ------------------------------------------------------------------------------------ Observations Description ------------------------ 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. 15700( 4) - 01-May-2019 14:12:14 - [ 2] 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 ------------------------------------------------------------------------------------ 15700( 4) - 01-May-2019 14:12:14 - [ 3] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 2 S3UE001085 STAR, CIRCUMSTELLAR RA=07H25M51.2842S, J2000 V = 9.71294 MATTER, INTERACTING DEC=-07D44'8.15" BINARY, JET, M III-I, SYMBIOTIC STAR Reference Frame: ICRS Comments: This object was generated by the targetselector and retrieved from the GSC 2.3 database. Epoch of Position RA proper motion (seconds of time/yr) DEC Proper Motion (arcsec/yr) Annual Parallax (arcsec) 2000 1.0764627333931312E-4 -0.004699999999999989 0.0 ------------------------------------------------------------------------------------------------------------------------------------ 15700( 4) - 01-May-2019 14:12:14 - [ 4] Visit: 01 Visit Requirements: On Hold Comments: Additional Comments: Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 S3UE001085 STIS/CCD ACQ F28X50OII MIRROR 1 1.0 S (1 I S) Comments: ACQ for Orbit 1 and E140M Observations. ------------------------------------------------------------------------------------------------------------------------------------ 2 S3UE001085 STIS/FUV TIME-TA 0.2X0.2 E140M 1425 BUFFER-TIME=467 1 1035 S -MAMA G (1035 S) Comments: First in a series of two E140M exposures for Orbit 1. ------------------------------------------------------------------------------------------------------------------------------------ 3 S3UE001085 STIS/FUV TIME-TA 0.2X0.2 E140M 1425 BUFFER-TIME=467 1 1035 S -MAMA G (1035 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 S3UE001085 STIS/CCD ACQ F28X50OII MIRROR 1 1.0 S (1 I S) Comments: ACQ for orbit 2 and the continuation of the E140M exposures ------------------------------------------------------------------------------------------------------------------------------------ 5 S3UE001085 STIS/FUV TIME-TA 0.2X0.2 E140M 1425 BUFFER-TIME=467 1 1030 S -MAMA G (1030 S) ------------------------------------------------------------------------------------------------------------------------------------ 6 S3UE001085 STIS/FUV TIME-TA 0.2X0.2 E140M 1425 BUFFER-TIME=467 1 1030 S -MAMA G (1030 S) ------------------------------------------------------------------------------------------------------------------------------------ 7 S3UE001085 STIS/CCD ACQ F28X50OII MIRROR 1 1.0 S (1 I S) Comments: ACQ for Orbit 3 and the E230M exposures. ------------------------------------------------------------------------------------------------------------------------------------ 8 S3UE001085 STIS/NUV TIME-TA 0.2X0.2 E230M 2415 BUFFER-TIME=110 1 402 S (402 -MAMA G S) Comments: First in a series of four E230M exposures ------------------------------------------------------------------------------------------------------------------------------------ 9 S3UE001085 STIS/NUV TIME-TA 0.2X0.2 E230M 2415 BUFFER-TIME=110 1 402 S (402 -MAMA G S) Comments: One of a series of E230M exposures ------------------------------------------------------------------------------------------------------------------------------------ 10 S3UE001085 STIS/NUV TIME-TA 0.2X0.2 E230M 2415 BUFFER-TIME=110 1 402 S (402 -MAMA G S) Comments: One of a series of E230M exposures ------------------------------------------------------------------------------------------------------------------------------------ 11 S3UE001085 STIS/NUV TIME-TA 0.2X0.2 E230M 2415 BUFFER-TIME=110 1 402 S (402 -MAMA G S) Comments: One of a series of E230M exposures 15700( 4) - 01-May-2019 14:12:14 - [ 5] Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ ------------------------------------------------------------------------------------------------------------------------------------ Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ S3UE001085 1 STIS/CCD ACQ F28X50OI MIRROR none none none none 1 N/A II S3UE001085 2 STIS/FUV TIME-TA 0.2X0.2 E140M 1425 none none none none 1 N/A -MAMA G S3UE001085 3 STIS/FUV TIME-TA 0.2X0.2 E140M 1425 none none none none 1 N/A -MAMA G S3UE001085 4 STIS/CCD ACQ F28X50OI MIRROR none none none none 2 N/A II S3UE001085 5 STIS/FUV TIME-TA 0.2X0.2 E140M 1425 none none none none 2 N/A -MAMA G S3UE001085 6 STIS/FUV TIME-TA 0.2X0.2 E140M 1425 none none none none 2 N/A -MAMA G S3UE001085 7 STIS/CCD ACQ F28X50OI MIRROR none none none none 3 N/A II S3UE001085 8 STIS/NUV TIME-TA 0.2X0.2 E230M 2415 none none none none 3 N/A -MAMA G S3UE001085 9 STIS/NUV TIME-TA 0.2X0.2 E230M 2415 none none none none 3 N/A -MAMA G S3UE001085 10 STIS/NUV TIME-TA 0.2X0.2 E230M 2415 none none none none 3 N/A -MAMA G S3UE001085 11 STIS/NUV TIME-TA 0.2X0.2 E230M 2415 none none none none 3 N/A -MAMA G 15700( 4) - 01-May-2019 14:12:14 - [ 6] Summary Form for Proposal 15700 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures 0.2X0.2, F28X50OIII ------------------------------------------------------------------------------------------------------------------------------------ Configurations STIS/CCD, STIS/FUV-MAMA, STIS/NUV-MAMA ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACQ, TIME-TAG ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters BUFFER-TIME=110, BUFFER-TIME=467 ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements E140M, E230M, MIRROR ------------------------------------------------------------------------------------------------------------------------------------ Target Names S3UE001085 ------------------------------------------------------------------------------------------------------------------------------------