0 Assigned ID: 4039 ----- Attempting Submission 1 (Mon May 22 18:32:01 GMT 2023) ----- HST Phase I Proposal 4039 successfully submitted. Receipt: # 4039-1 ----- Attempting Submission 2 (Wed May 24 16:22:00 GMT 2023) ----- 0 ----- Attempting Submission 1 (Wed Sep 13 21:07:24 GMT 2023) ----- HST Phase II Proposal 17521 successfully submitted. Receipt: # 17521-1 ----- Attempting Submission 2 (Thu Sep 14 20:43:27 GMT 2023) ----- HST Phase II Proposal 17521 successfully submitted. Receipt: # 17521-2 ----- Attempting Submission 3 (Thu Sep 14 20:44:22 GMT 2023) ----- ----- Attempting Submission 4 (Thu Mar 28 00:19:59 GMT 2024) ----- ----- Attempting Submission 5 (Thu May 02 20:34:30 GMT 2024) ----- These three errors are related to not listing ETC numbers for T 54. For the ACS observations, we use the same exposture time as previous successful archival observations. For the NUV MAMA observations, we use the same exposure time as SZ Cha since T 54 and SZ Cha have similar brightness and properties. The SZ Cha observations have ETC numbers and also have previous successful archival observations using these same exposure times. A multiwavelength study of protoplanetary disk ionization We aim to determine whether the magnetorotational instability (MRI) could be the elusive driver of turbulent accretion in protoplanetary disks. To accomplish this, we will measure the amount of X-ray induced disk ionization in a sample of three protoplanetary disks, leveraging the unique synergy provided by Chandra, HST, and JWST to simultaneously measure X-ray through UV luminosities and the fluxes of mid-infrared [Ne II] and [Ne III] fine structure lines. When combined with thermochemical modeling, these simultaneous Chandra, HST, and JWST observations will characterize the high-energy radiation spectrum impinging on the disk and lead to a measurement of the disk ionization fraction, which will test if the MRI is responsible for accretion in protoplanetary disks. We request a total of 6 orbits with HST, two per object. We calculate exposure times using existing HST data for our targets and the appropriate ETC. We request simultaneous observations with Chandra and JWST taken within 1 hr of the HST observations since the Ne line luminosities are expected to change within 1 hr in response to a change in the X-ray luminosity. Since this program requires coordinated observations between three telescopes, if there are fewer observing windows due to failure of a gyro, that would make this program very difficult to schedule. For SZ Cha and TW Hya, we will use STIS to cover the FUV. T54 is very faint in the FUV, and we will use ACS. For SZ Cha, we will use the G140L grating. Given the brightness of TW Hya, we will use the E140M grating. For each, we will begin with a brief image with the F28X50OIII filter for target acquisition. We will observe T54 with ACS SBC and PR130L. The overhead for guide star and target acquisition is ~10 minutes. T54 will also need a short (< 1 min) FUV image with the F140LP filter on the SBC for wavelength calibration. Using archival STIS FUV data of SZ Cha and TW Hya and ACS data of T 54, we estimate reaching SNR~10 in the FUV continuum with 1 orbit per target. Each object will need MAMA NUV spectra to measure the mass accretion rates, so we choose the G230L gratings covering 1570 - 3180 Angstroms. Obtaining nearly simultaneous optical and NIR spectra is crucial to measure the extinction precisely and accurately calculate the NUV excess above the stellar photosphere. We will use the CCD G430L grating (2900 - 5700 Angstroms) and the CCD G750L grating (5240-11490 Angstroms). In addition, we will obtain contemporaneous fringe flats to correct the spectra beyond 7000 Angstroms where severe fringing occurs. Low resolution is sufficient for this study since we are not attempting to measure individual FUV to optical lines in detail. Using archival STIS NUV and CCD data of SZ Cha and TW Hya, we will achieve SNR~15 in the NUV continuum and SNR>50 in the optical with 1 orbit per target. For T 54, there are no HST NUV or CCD observations and so we created a synthetic NUV and optical spectrum using the accretion shock model and optical photometry. In 1 orbit, we will achieve an SNR of >50 for the optical and NIR observations and SNR~15 for the NUV observations. We have considered the typical ranges seen in CTTS variability and checked the brightness limits of MAMA and the saturation levels of the CCD. Our targets fall within the acceptable limits for variable objects. We will enable TIME-TAG to test for short-scale variability by tracking every photon's position and detection time. Espaillat is an expert on FUV observations and will reduce and interpret the FUV data. Espaillat and Pittman are experts on NUV observations and will reduce and interpret the NUV data. Espaillat and McClure are experts on MIR observations and will reduce and interpret the MIR data. Reynolds is an expert on X-ray observations and will reduce and interpret the X-ray data. Calvet, Franco-Hernandez, Thanathibodee, and Macias are experts in chemical modeling and will work to interpret the Ne line luminosities. Babb and Yan are experts in fine-structure lines and will provide new cross-sections through neutral collision rates and charge exchange rate coefficients for Ne. Stellar Physics and Stellar Types Exoplanets and Exoplanet Formation 6 false false true false false false false 5.08 true SUPPORTED STAR T TAURI STAR This object was generated by the targetselector and retrieved from the SIMBAD database. J2000 J2000 STAR T TAURI STAR This object was generated by the targetselector and retrieved from the SIMBAD database. J2000 J2000 STAR T TAURI STAR This object was generated by the targetselector and retrieved from the SIMBAD database. J2000 J2000 STIS/CCD Spectroscopic No No G750L 7751 STIS/CCD Spectroscopic No No G430L 4300 STIS/NUV-MAMA Spectroscopic No No G230L 2376 STIS/FUV-MAMA Spectroscopic No No G140L 1425 STIS/CCD Spectroscopic No No G750L 7751 STIS/CCD Spectroscopic No No G430L 4300 STIS/NUV-MAMA Spectroscopic No No G230L 2376 STIS/FUV-MAMA Spectroscopic No No E140M 1425 STIS/CCD Spectroscopic No No G750L 7751 STIS/CCD Spectroscopic No No G430L 4300 STIS/NUV-MAMA Spectroscopic No No G230L 2376 ACS/SBC Spectroscopic No No PR130L The scheduling data was generated by CASM 32.1.3. CASM was run in Phase II mode. /System/Volumes/Data/solaris/user1/wskipper/OP-cache/17521-v01.xml This is a joint HST, JWST, Chandra proposal and these HST observations should be scheduled to be as simultaneous as possible with the JWST and Chandra observations of this target. In the approved proposal, we requested within 1 hour. (Tic-Visit :proposal-id 17521 :visit-id "01" :proposal-version -1 :trans-version "20240604" :date "02-Jul-2024 08:38:20.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 2 :saa-model "24" :si-bright-earth-limb-angle 20.0 :data-volume 547728 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 17521 :visit-id "01" :obset-id "01" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 17521 :visit-id "01" :orbit-number 1 :pcs-time 380 :si-vis-utilization 2837 :al-overhead-at-end 0 :internal-dur-at-end 2093 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3218 :pcs-gap 0 ) (Tic-Orbit :proposal-id 17521 :visit-id "01" :orbit-number 2 :pcs-time 380 :si-vis-utilization 2838 :al-overhead-at-end 0 :internal-dur-at-end 623 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3218 :pcs-gap 0 ) true 2 0 The scheduling data was generated by CASM 32.1.3. CASM was run in Phase II mode. /System/Volumes/Data/solaris/user1/wskipper/OP-cache/17521-v02.xml This is a joint HST, JWST, Chandra proposal and these HST observations should be scheduled to be as simultaneous as possible with the JWST and Chandra observations of this target. In the approved proposal, we requested within 1 hour. 1716345588000 75.85431223784579 (Tic-Visit :proposal-id 17521 :visit-id "02" :proposal-version -1 :trans-version "20240604" :date "02-Jul-2024 08:38:27.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 2 :saa-model "28" :si-bright-earth-limb-angle 20.0 :data-volume 378272 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 17521 :visit-id "02" :obset-id "02" :pcs-mode "FGS" ) (Tic-Obset :proposal-id 17521 :visit-id "02" :obset-id "A2" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 17521 :visit-id "02" :orbit-number 1 :pcs-time 380 :si-vis-utilization 2780 :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 3218 :pcs-gap 0 ) (Tic-Orbit :proposal-id 17521 :visit-id "02" :orbit-number 2 :pcs-time 380 :si-vis-utilization 2837 :al-overhead-at-end 0 :internal-dur-at-end 117 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3218 :pcs-gap 0 ) true 2 0 The scheduling data was generated by CASM 32.1.3. CASM was run in Phase II mode. /System/Volumes/Data/solaris/user1/wskipper/OP-cache/17521-v03.xml This is a joint HST, JWST, Chandra proposal and these HST observations should be scheduled to be as simultaneous as possible with the JWST and Chandra observations of this target. In the approved proposal, we requested within 1 hour. (Tic-Visit :proposal-id 17521 :visit-id "03" :proposal-version -1 :trans-version "20240604" :date "02-Jul-2024 08:38:38.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 2 :saa-model "24" :si-bright-earth-limb-angle 20.0 :data-volume 617264 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 17521 :visit-id "03" :obset-id "03" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 17521 :visit-id "03" :orbit-number 1 :pcs-time 380 :si-vis-utilization 2641 :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 3034 :pcs-gap 0 ) (Tic-Orbit :proposal-id 17521 :visit-id "03" :orbit-number 2 :pcs-time 380 :si-vis-utilization 2654 :al-overhead-at-end 0 :internal-dur-at-end 578 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3034 :pcs-gap 0 ) true 2 0