14665( 4) - 26-Jun-2017 18:46:45 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 14665 Version: 4 Check-in Time: 26-Jun-2017 18:46:45 STScI Edit Number: 0 Title Ultraviolet Spectra of a Normal Standard Candle ------------------------------------------------------------------------------------ Type Cycle GO 24 ------------------------------------------------------------------------------------ Investigators Contact? PI: Dr. Peter J. Brown Texas A & M University Y ------------------------------------------------------------------------------------ Abstract Type Ia Supernovae (SNe Ia) are important tools in the study of our universe, but are not fully understood at rest-frame ultraviolet (UV) wavelengths. High quality spectra in the mid-UV (<2500 Angstroms) are scarce because of the need for space based observations and the faint flux levels in the UV due to the absorption of iron peak elements. While bad for flux levels, the iron line blanketing makes the UV spectrum very sensitive to differences in the temperature, density, and metallicity--important ingredients for SN modeling. An explosion of ultraviolet observations of type Ia Supernovae (SNe Ia) has revealed a diversity in the UV properties of even optically normal SNe. HST has recently obtained several excellent UV spectra reaching mid-UV wavelengths for examples of SNe that are "UV-blue" or have broad or moderately narrow optical light curves. Yet we are still lacking a good UV spectrum of an UV and optically normal SN Ia. Dozens of UV light curves from Swift/UVOT and dozens of rest-frame UV observations of high redshift SNe observed from the ground and HST will benefit from the physical insight gained from high quality UV spectra. These spectra will be crucial to modelling the varied behavior we observe in the UV. We propose target of opportunity observations with HST to provide mid-UV photometry and spectroscopy of a normal SN Ia this cycle. These will serve as benchmarks against which to compare photometry, other spectroscopy, and theoretical models. ------------------------------------------------------------------------------------ Observations Description ------------------------ This is a target of opportunity program for UV observations of one type Ia supernova to be discovered during cycle 24. We will observe at four epochs spaced by five days for 3, 3, 3, and 5 orbits each for our nominal target. Swift UV observations will have been performed prior to triggering and will be used to perform the STIS-MAMA safety checks. Some modifications might be required once we trigger based on the brightness of the object. For example, a brighter object might have 6 visits with fewer orbits per visit. ------------------------------------------------------------------------------------ 14665( 4) - 26-Jun-2017 18:46:45 - [ 2] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 2 SN2017ERP EXT-STAR, SUPERNOVA RA=15H09M14.8220S +/- 0.2", J2000 Z = V = 13.6 +/- 0.1 uvw1=15.3 +/- 0.1, TYPE IA DEC=-11D20'3.06" +/- 0.2" 0.006 uvm2=18.5 +- 0.2 Reference Frame: ICRS Extended: NO ------------------------------------------------------------------------------------------------------------------------------------ 14665( 4) - 26-Jun-2017 18:46:45 - [ 3] Visit: 05 (first visit) Visit Requirements: SCHED 90%; BETWEEN 26-JUN-2017:00:00:00 AND 01-JUL-2017:00:00:00; ON HOLD ; TOO RESPONSE TIME 3.0D On Hold Comments: ToO trigger 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 SN2017ERP STIS/CCD ACQ F28X50LP MIRROR 1 0.1 S (0.1 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 SN2017ERP STIS/CCD ACQ/PEA 52X0.1E1 MIRROR 1 0.1 S (0.1 K S) ------------------------------------------------------------------------------------------------------------------------------------ 3 SN2017ERP STIS/CCD ACCUM 52X0.2E1 G430L 4300 1 500 S see below (1912 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 SN2017ERP STIS/NUV ACCUM 52X0.1 G230L 2376 1 1500 S -MAMA see below (2749 S) ------------------------------------------------------------------------------------------------------------------------------------ 5 SN2017ERP STIS/NUV ACCUM 52X0.1 G230L 2376 1 3000 S -MAMA see below (1307 S) ------------------------------------------------------------------------------------------------------------------------------------ 6 SN2017ERP STIS/NUV ACCUM 52X0.1 G230L 2376 1 3000 S -MAMA see below (1307 S) ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ SN2017ERP 1 STIS/CCD ACQ F28X50LP MIRROR none none none none 1 N/A SN2017ERP 2 STIS/CCD ACQ/PEA 52X0.1E1 MIRROR none none none none 1 N/A K SN2017ERP 3 STIS/CCD ACCUM 52X0.2E1 G430L 4300 none none none 1 1 956.0 S SN2017ERP 3 STIS/CCD ACCUM 52X0.2E1 G430L 4300 none none none 2 1 956.0 S SN2017ERP 4 STIS/NUV ACCUM 52X0.1 G230L 2376 none none none none 2 2749.0 S -MAMA SN2017ERP 5 STIS/NUV ACCUM 52X0.1 G230L 2376 none none none none 3 1307.0 S -MAMA SN2017ERP 6 STIS/NUV ACCUM 52X0.1 G230L 2376 none none none none 3 1307.0 S -MAMA 14665( 4) - 26-Jun-2017 18:46:45 - [ 4] Visit: 06 (second visit) Visit Requirements: AFTER 05 BY 2 D TO 5 D; ON HOLD ; TOO RESPONSE TIME 3.0D On Hold Comments: ToO trigger 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 SN2017ERP STIS/CCD ACQ F28X50LP MIRROR 1 0.1 S (0.1 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 SN2017ERP STIS/CCD ACQ/PEA 52X0.1E1 MIRROR 1 0.1 S (0.1 K S) ------------------------------------------------------------------------------------------------------------------------------------ 3 SN2017ERP STIS/CCD ACCUM 52X0.1E1 G430L 4300 1 500 S see below (726 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 SN2017ERP STIS/NUV ACCUM 52X0.1 G230L 2376 1 1000 S -MAMA see below (1113 S) ------------------------------------------------------------------------------------------------------------------------------------ 5 SN2017ERP STIS/NUV ACCUM 52X0.1 G230L 2376 1 3000 S -MAMA see below (2959 S) ------------------------------------------------------------------------------------------------------------------------------------ 6 SN2017ERP STIS/NUV ACCUM 52X0.1 G230L 2376 1 3000 S -MAMA see below (2959 S) ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ SN2017ERP 1 STIS/CCD ACQ F28X50LP MIRROR none none none none 1 N/A SN2017ERP 2 STIS/CCD ACQ/PEA 52X0.1E1 MIRROR none none none none 1 N/A K SN2017ERP 3 STIS/CCD ACCUM 52X0.1E1 G430L 4300 none none none 1 1 363.0 S SN2017ERP 3 STIS/CCD ACCUM 52X0.1E1 G430L 4300 none none none 2 1 363.0 S SN2017ERP 4 STIS/NUV ACCUM 52X0.1 G230L 2376 none none none none 1 1113.0 S -MAMA SN2017ERP 5 STIS/NUV ACCUM 52X0.1 G230L 2376 none none none none 2 2959.0 S -MAMA SN2017ERP 6 STIS/NUV ACCUM 52X0.1 G230L 2376 none none none none 3 2959.0 S -MAMA 14665( 4) - 26-Jun-2017 18:46:45 - [ 5] Visit: 07 (third visit) Visit Requirements: AFTER 06 BY 4 D TO 6 D; ON HOLD ; TOO RESPONSE TIME 3.0D On Hold Comments: ToO trigger 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 SN2017ERP STIS/CCD ACQ F28X50LP MIRROR 1 0.2 S (0.2 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 SN2017ERP STIS/CCD ACQ/PEA 52X0.1E1 MIRROR 1 0.1 S (0.1 K S) ------------------------------------------------------------------------------------------------------------------------------------ 3 SN2017ERP STIS/CCD ACCUM 52X0.1E1 G430L 4300 1 500 S see below (726 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 SN2017ERP STIS/NUV ACCUM 52X0.1 G230L 2376 1 1000 S -MAMA see below (1113 S) ------------------------------------------------------------------------------------------------------------------------------------ 5 SN2017ERP STIS/NUV ACCUM 52X0.1 G230L 2376 1 3000 S -MAMA see below (2959 S) ------------------------------------------------------------------------------------------------------------------------------------ 6 SN2017ERP STIS/NUV ACCUM 52X0.1 G230L 2376 1 3000 S -MAMA see below (2959 S) ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ SN2017ERP 1 STIS/CCD ACQ F28X50LP MIRROR none none none none 1 N/A SN2017ERP 2 STIS/CCD ACQ/PEA 52X0.1E1 MIRROR none none none none 1 N/A K SN2017ERP 3 STIS/CCD ACCUM 52X0.1E1 G430L 4300 none none none 1 1 363.0 S SN2017ERP 3 STIS/CCD ACCUM 52X0.1E1 G430L 4300 none none none 2 1 363.0 S SN2017ERP 4 STIS/NUV ACCUM 52X0.1 G230L 2376 none none none none 1 1113.0 S -MAMA SN2017ERP 5 STIS/NUV ACCUM 52X0.1 G230L 2376 none none none none 2 2959.0 S -MAMA SN2017ERP 6 STIS/NUV ACCUM 52X0.1 G230L 2376 none none none none 3 2959.0 S -MAMA 14665( 4) - 26-Jun-2017 18:46:45 - [ 6] Visit: 08 (fourth visit) Visit Requirements: AFTER 07 BY 4 D TO 8 D; ON HOLD ; TOO RESPONSE TIME 3.0D On Hold Comments: ToO trigger 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 SN2017ERP STIS/CCD ACQ F28X50LP MIRROR 1 0.3 S (0.3 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 SN2017ERP STIS/CCD ACQ/PEA 52X0.1E1 MIRROR 1 0.1 S (0.1 K S) ------------------------------------------------------------------------------------------------------------------------------------ 3 SN2017ERP STIS/CCD ACCUM 52X0.1E1 G430L 4300 1 800 S see below (958 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 SN2017ERP STIS/NUV ACCUM 52X0.1 G230L 2376 1 800 S -MAMA see below (879 S) ------------------------------------------------------------------------------------------------------------------------------------ 5 SN2017ERP STIS/NUV ACCUM 52X0.1 G230L 2376 1 3000 S -MAMA see below (2959 S) ------------------------------------------------------------------------------------------------------------------------------------ 6 SN2017ERP STIS/NUV ACCUM 52X0.1 G230L 2376 1 3000 S -MAMA see below (2959 S) ------------------------------------------------------------------------------------------------------------------------------------ 7 SN2017ERP STIS/CCD ACQ/PEA 52X0.1E1 MIRROR 1 1 S (1 S) K ------------------------------------------------------------------------------------------------------------------------------------ 8 SN2017ERP STIS/CCD ACQ/PEA 52X0.1E1 MIRROR 1 0.1 S (0.1 K S) ------------------------------------------------------------------------------------------------------------------------------------ 9 SN2017ERP STIS/NUV ACCUM 52X0.1 G230L 2376 1 1200 S -MAMA see below (2113 S) ------------------------------------------------------------------------------------------------------------------------------------ 10 SN2017ERP STIS/NUV ACCUM 52X0.1 G230L 2376 1 2500 S -MAMA see below (2959 S) ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ 14665( 4) - 26-Jun-2017 18:46:45 - [ 7] 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 | ------------------------------------------------------------------------------------------------------------------------------------ SN2017ERP 1 STIS/CCD ACQ F28X50LP MIRROR none none none none 1 N/A SN2017ERP 2 STIS/CCD ACQ/PEA 52X0.1E1 MIRROR none none none none 1 N/A K SN2017ERP 3 STIS/CCD ACCUM 52X0.1E1 G430L 4300 none none none 1 1 479.0 S SN2017ERP 3 STIS/CCD ACCUM 52X0.1E1 G430L 4300 none none none 2 1 479.0 S SN2017ERP 4 STIS/NUV ACCUM 52X0.1 G230L 2376 none none none none 1 879.0 S -MAMA SN2017ERP 5 STIS/NUV ACCUM 52X0.1 G230L 2376 none none none none 2 2959.0 S -MAMA SN2017ERP 6 STIS/NUV ACCUM 52X0.1 G230L 2376 none none none none 3 2959.0 S -MAMA SN2017ERP 7 STIS/CCD ACQ/PEA 52X0.1E1 MIRROR none none none none 4 N/A K SN2017ERP 8 STIS/CCD ACQ/PEA 52X0.1E1 MIRROR none none none none 4 N/A K SN2017ERP 9 STIS/NUV ACCUM 52X0.1 G230L 2376 none none none none 4 2113.0 S -MAMA SN2017ERP 10 STIS/NUV ACCUM 52X0.1 G230L 2376 none none none none 5 2959.0 S -MAMA 14665( 4) - 26-Jun-2017 18:46:45 - [ 8] Summary Form for Proposal 14665 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures 52X0.1, 52X0.1E1, 52X0.2E1, F28X50LP ------------------------------------------------------------------------------------------------------------------------------------ Configurations STIS/CCD, STIS/NUV-MAMA ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACCUM, ACQ, ACQ/PEAK ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements AFTER 05 BY 2 D TO 5 D, AFTER 06 BY 4 D TO 6 D, AFTER 07 BY 4 D TO 8 D, BETWEEN 26-JUN-2017:00:00:00 AND 01-JUL-2017:00:00:00, ON HOLD , SCHED 90%, TOO RESPONSE TIME 3.0D ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements G230L, G430L, MIRROR ------------------------------------------------------------------------------------------------------------------------------------ Target Names SN2017ERP ------------------------------------------------------------------------------------------------------------------------------------