Illegal selection: 28. 0 Assigned ID: 1365 ----- Attempting Submission 1 (Sat Jan 30 18:25:13 GMT 2021) ----- ----- Attempting Submission 2 (Sun Jan 31 04:33:14 GMT 2021) ----- bb I removed the orient from the first visit, and added the details of the Swift UVOT observations under "Proposal description". 358471237 ----- Attempting Submission 1 (Tue Mar 23 17:45:08 GMT 2021) ----- ----- Attempting Submission 2 (Wed Apr 14 07:59:43 GMT 2021) ----- Could not connect to APT Status Server 0 The remnants of planetary systems that survived the metamorphosis of their host stars into white dwarfs are identified in the form of compact debris disks, formed from the tidal disruption of planetesimals. These disks are detectable as IR flux excess, and, in rare occasions, as metallic emission lines from a gaseous disk component in optical spectra. These gaseous disks are thought to host embedded solid fragments, maybe the core, of the disrupted planetesimal, and represent ideal targets for joint ultraviolet, optical and infrared observations that provide unrivalled insight into the formation of these disks, the nature of the disrupting planetesimal, the elemental abundances of the planetary debris, and its mineralogical make-up. Here, we propose COS far-ultraviolet spectroscopy of a new, bright, and nearby gaseous disk system that we identified in December 2020, to measure the elemental abundances of the planetary material. The far-ultraviolet wavelength range is critically important to access transitions of core (Fe, Ni), mantle (Si, Mg, O), and crust (Ca, Al), as well as volatiles (C, N, S, P) species that have no transitions at optical wavelengths, or are contaminated by the disk emission lines. This system is also a prime target for JWST Cycle 2 MIRI spectroscopy of the circumstellar dust, and this mid-cycle program will ensure that the composition of the debris is known well in time for the next JWST proposal round. The goal of this proposal is to obtain full spectroscopic coverage over ~1100 - 1430A. For this purpose, we will use the G130M grating with two different central wavelengths, 1291A and 1222A. At each central wavelength, we use all available FP-POS settings to mitigate fixed pattern noise. The target is a single white dwarf, not variable, and an acquisition with NUV imaging using MIRROR-B is safe and efficient. We split the @1291A and @1222A observations into two separate visits to facilitate the scheduling. We obtained a Swift ToO UVOT UVW2 observation of the target https://www.swift.psu.edu/operations/obsSchedule.php?t=14167&perc=1 to establish the UV flux to be 2.1e-14A @ 1928A (see below). The intrinsic spectrum of this white dwarf is close to a blackbody with Teff=20500K, which we adopted for the ETC calculations, scaled to the Swift UVW2 flux. uvotsource: Source Position: RA = 00h 05m 45.13s, Dec = +58d 05m 39.0s (J2000) Position: RA = 1.43806, Dec = 58.09418 (J2000) Exposure: 654.53 s Filter: UVW2 Significance: 136.0 sigma (stat) Background-limit: 3.0 sigma (stat) uvotsource: UVOT uvw2 magnitude (AB system) Source: 15.25 +/- 0.02 (stat) +/- 0.03 (sys) Background: 24.22 arcsec^-2 Background-limit: 21.04 Coincidence-limit: 12.68 uvotsource: Flux density [erg/s/cm^2/A] Source: 2.08 +/- 0.04 (stat) +/- 0.05 (sys) x 10^-14 Background: 5.41 +/- 0.04 (stat) +/- 0.12 (sys) x 10^-18 arcsec^-2 Background-limit: 1.01 x 10^-16 Coincidence-limit: 2.22 x 10^-13 Gaensicke has been PI of 20 HST programs, carrying out far-ultraviolet spectroscopy of white dwarfs, including large, medium, small GO programs and several snapshot programs. He has in-depth experience in the analysis and interpretation of the observations of accreting white dwarfs, both in binary systems, and evolved planetary systems. He will implement the observations, and lead the analysis. Toloza is an expert in the analysis of COS time-tag observations. She will carry out the data reduction and the computation of white dwarf model atmospheres using the code of Detlev Koester. Inight is leading the development of a spectroscopic white dwarf data base for the observations from SDSS-V, from which WDJ0005+5805 was identified. Schreiber is leading the dynamical modelling of the evolution of the system. Exoplanets and Exoplanet Formation 3 false false false false false false false SUPPORTED STAR DB NO J2000 J2000 Swift uvw2(lambda_eff=1928A)=15.25 AB mag COS/FUV Spectroscopic No No G130M 1222 COS/FUV Spectroscopic No No G130M 1291 1618387025105 The scheduling data was generated by CASM 29.0. CASM was run in Phase II mode. /tmp/OPVisit15635639511461768224.xml Only two FP-POS settings allowed for the 1291A central wavelength. (Tic-Visit :proposal-id 16502 :visit-id "01" :proposal-version -1 :trans-version "20200619" :date "14-Apr-2021 08:57:04.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 2 :saa-model "31" :si-bright-earth-limb-angle 20.0 :data-volume 469728 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 16502 :visit-id "01" :obset-id "01" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 16502 :visit-id "01" :orbit-number 1 :pcs-time 393 :si-vis-utilization 2996 :al-overhead-at-end 0 :internal-dur-at-end 95 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3389 :pcs-gap 0 ) (Tic-Orbit :proposal-id 16502 :visit-id "01" :orbit-number 2 :pcs-time 392 :si-vis-utilization 2997 :al-overhead-at-end 0 :internal-dur-at-end 407 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3389 :pcs-gap 0 ) true 2 0 1616521016964 The scheduling data was generated by CASM 29.0. CASM was run in Phase II mode. (Tic-Visit :proposal-id 16502 :visit-id "02" :proposal-version -1 :trans-version "20200619" :date "23-Mar-2021 17:36:56.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 2 :saa-model "31" :si-bright-earth-limb-angle 20.0 :data-volume 365504 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 16502 :visit-id "02" :obset-id "02" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 16502 :visit-id "02" :orbit-number 1 :pcs-time 393 :si-vis-utilization 2996 :al-overhead-at-end 0 :internal-dur-at-end 38 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3389 :pcs-gap 0 ) (Tic-Orbit :proposal-id 16502 :visit-id "02" :orbit-number 2 :pcs-time 392 :si-vis-utilization 2997 :al-overhead-at-end 0 :internal-dur-at-end 331 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3389 :pcs-gap 0 ) true 2 0