14229( 4) - 15-Aug-2016 13:01:42 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 14229 Version: 4 Check-in Time: 15-Aug-2016 13:01:42 STScI Edit Number: 0 Title Characterizing a Magnetic CV Associated with a PNe via COS UV Spectroscopy ------------------------------------------------------------------------------------ Type Cycle GO 23 ------------------------------------------------------------------------------------ Investigators Contact? PI: Dr. Mark Reynolds University of Michigan Y CoI: Dr. Jon Matthew Miller University of Michigan N ------------------------------------------------------------------------------------ Abstract Cataclysmic variables (CVs) are the most abundant class of X-ray binary system. We have recently discovered a new CV that is consistent with the position of a known planetary nebula. The discovery of a compact binary system in a planetary nebula comes with the promise of insight into common envelope physics and SN Ia progenitors if the binary mass is greater than Chandrasekhar. Herein, we propose to obtain 2 orbits of HST/COS FUV moderate resolution spectroscopy to further characterize this intriguing binary system. The requested science exposure will enable the first constraints to be placed on the FUV emission, including the potential emission from the WD and the truncated accretion disk. ------------------------------------------------------------------------------------ Observations Description ------------------------ Proposed Observation: ================== We propose to obtain a high quality FUV spectrum of the cataclysmic variable G343.3-0.6, with HST/COS. This observation will enable constraints to be placed on the nature of the accretion flow via detection of the high energy flux from the inner accretion disk and perhaps even the surface of the white dwarf (e.g., Gansicke et al. 2006, Sion et al. 2013). Observing Mode: ============= We plan to use the FUV grating G140L with a central wavelength of lambda_c=1105Ang. This will provide continuous spectral coverage between 1121 - 2148Ang (segment A), while turning segment B off. This wavelength range includes most of the high and medium ionization lines from C, N, O, Si and HeII which we expect to be strong for this source. We prefer lambda_c=1105 over lambda_c=1280 because we are especially interested in the N V line emission near 1240Ang (to determine the elemental abundances, ionization structure), which would fall between the A and B segments for lambda_c=1280Ang setting. The bright geo-coronal Ly_alpha emission will make a region of 10Ang width unusable around 1216Ang, but should not affect the N V line. All observations will be carried out in TIME-TAG, FLASH=YES, SEGMENT=A mode so that the position, arrival time, and pulse height of each detected photon are recorded, and science and wavelength-calibration spectra are obtained concurrently. The spectral lines we are interested in are significantly far 14229( 4) - 15-Aug-2016 13:01:42 - [ 2] from the prominent geo-coronal emission lines like Ly_alpha and O I 1304Ang. Furthermore, TIME-TAG mode will allow us to filter out any unpredictable transient changes in the background. Based on the detailed orbit planning, the entire program will be completed in 2 HST orbits. ------------------------------------------------------------------------------------ 14229( 4) - 15-Aug-2016 13:01:42 - [ 3] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 PNEG343 STAR, ACCRETION DISK, RA=17H01M28.1600S +/- 0.1", J2000 V = 16 +/- 0.5 0.06 mJy @ 2000 Angstrom INTERMEDIATE POLAR, DEC=-43D06'12.40" +/- 0.1" PLANETARY NEBULA CENTRAL STAR Reference Frame: ICRS Extended: NO ------------------------------------------------------------------------------------------------------------------------------------ 2 PNEG343-SAFE UNIDENTIFIED, BLANK RA-OFF=0.69S, DEC-OFF=5.033", J2000 V = 16 +/- 0.5 -TARGET FIELD FROM 1 Extended: NO Comments: This target is a blank piece of sky which is the bright object safe pointing and is 9.163 arseconds away at a PA 56.7 degrees from PNEG343. Based on observations for day 16.280 (U3=105) ------------------------------------------------------------------------------------------------------------------------------------ 14229( 4) - 15-Aug-2016 13:01:42 - [ 4] Visit: 01 (orbit I) Visit Requirements: ORIENT 260D TO 120 D On Hold Comments: Additional Comments: This should be scheduled in evening, local time. Flags need to be cleared during the work day. 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 PNEG343 COS/NUV ACQ/IMA PSA MIRRORA 1 15 S (15 USE OFFSET V01SAF GE S) ------------------------------------------------------------------------------------------------------------------------------------ 2 PNEG343 COS/FUV TIME-TA PSA G140L 1105 FP-POS=ALL, BUFFER-TIME=1150, 1 1250 S USE OFFSET V01SAF G SEGMENT=A, FLASH=YES see below (5370 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 | ------------------------------------------------------------------------------------------------------------------------------------ PNEG343 1 COS/NUV ACQ/IMA PSA MIRRORA none none none none 1 N/A GE PNEG343 2 COS/FUV TIME-TA PSA G140L 1105 none none none 1 1 1250.0 S G PNEG343 2 COS/FUV TIME-TA PSA G140L 1105 none none none 2 1 1230.0 S G PNEG343 2 COS/FUV TIME-TA PSA G140L 1105 none none none 3 2 1440.0 S G PNEG343 2 COS/FUV TIME-TA PSA G140L 1105 none none none 4 2 1450.0 S G 14229( 4) - 15-Aug-2016 13:01:42 - [ 5] Visit: B1 (SCIENCETARGET-BOP-ONLY) Visit Requirements: ORIENT 260D TO 120 D On Hold Comments: Additional Comments: This visit is for BOP checking the safe target only and should not execute onboard HST 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 PNEG343-SAF COS/NUV ACQ/IMA PSA MIRRORA 1 12 S (12 E-TARGET GE S) ------------------------------------------------------------------------------------------------------------------------------------ 2 PNEG343-SAF COS/FUV TIME-TA PSA G140L 1105 FP-POS=ALL, BUFFER-TIME=1150, 1 1250 S E-TARGET G SEGMENT=A, FLASH=YES see below (5380 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 | ------------------------------------------------------------------------------------------------------------------------------------ PNEG343-SAFE-TARGET 1 COS/NUV ACQ/IMA PSA MIRRORA none none none none 1 N/A GE PNEG343-SAFE-TARGET 2 COS/FUV TIME-TA PSA G140L 1105 none none none 1 1 1250 S G PNEG343-SAFE-TARGET 2 COS/FUV TIME-TA PSA G140L 1105 none none none 2 1 1250 S G PNEG343-SAFE-TARGET 2 COS/FUV TIME-TA PSA G140L 1105 none none none 3 2 1440.0 S G PNEG343-SAFE-TARGET 2 COS/FUV TIME-TA PSA G140L 1105 none none none 4 2 1440.0 S G 14229( 4) - 15-Aug-2016 13:01:42 - [ 6] Visit: T1 (Offset SC visit) Visit Requirements: ORIENT 260D TO 120 D On Hold Comments: Additional Comments: This visit allocates and sets up the safe position offset slot for 01 which will use that slot. This S/C visit should go early in the week while visit 01 will be at least 3 days later. The S/C visit will contain only 1 exposure. Offset based on 16.280, U3=105 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 PNEG343 S/C DATA V1 1 5 S (5 S) POS TARG 232.723, -237.515; SAVE OFFSET V01SAF; SPEC COM INSTR ECSLOTSET; QESIPARM ANGLE 56.7; QESIPARM DIST 9.163 ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ PNEG343 1 S/C DATA V1 none none none none 1 N/A 14229( 4) - 15-Aug-2016 13:01:42 - [ 7] Summary Form for Proposal 14229 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures PSA, V1 ------------------------------------------------------------------------------------------------------------------------------------ Configurations COS/FUV, COS/NUV, S/C ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACQ/IMAGE, DATA, TIME-TAG ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters BUFFER-TIME=1150, FLASH=YES, FP-POS=ALL, SEGMENT=A ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements ORIENT 260D TO 120 D, POS TARG 232.723, -237.515, QESIPARM ANGLE 56.7, QESIPARM DIST 9.163, SAVE OFFSET V01SAF, SPEC COM INSTR ECSLOTSET, USE OFFSET V01SAF ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements G140L, MIRRORA ------------------------------------------------------------------------------------------------------------------------------------ Target Names PNEG343, PNEG343-SAFE-TARGET ------------------------------------------------------------------------------------------------------------------------------------