The surprising April, 2011 explosion of the recurrent nova T Pyxidis, a potential Type Ia supernova progenitor, offers a unique opportunity to catch T Pyx on the decline and into quiescence where we expect to see the FUV continuum fade, emission lines weaken and the heated, bloated white dwarf (WD) continue to cool. Our three earlier STIS observations of T Pyx were centered on the outburst maximum, followed by a just awarded DDT proposal to obtain a single STIS and COS spectrum to cover the decline, until this standard Cycle 20 GO proposal. This will culminate in a complete and unprecedented cooling curve of the heated, bloated WD in the FUV, for the first time down to the Lyman Limit at high resolution, all the way from outburst into quiescence. Our hydrodynamic and synthetic spectral modeling of this unique spectroscopic dataset will enable us to measure the cooling rate, discriminate between the cooling of a massive (near Chandrasekhar mass) post-nova WD versus the cooling of a less massive WD, detail the accretion environment including if, and when, the accretion disk is re-formed, discover how much the WD was heated by the outburst, constrain the accretion rate, and possibly help explain why its latest nova outburst was delayed by 44 years. Virtually nothing is known about the cooling behavior of the white dwarf in recurrent novae and classical novae so soon after outburst in the FUV with the necessary resolution. We request one observation (3 orbits) towards the beginning of Cycle 20 while T Pyx is declining and a secong observation about 6months later (or towards the end of Cycle 20; also 3 orbits) when T Pyx will have most possibly reached its quiescent state. We request that each of the two observations (each of 3 orbits) be made of a STIS (E140M) observation (lasting 2 orbits) followed immediately by a COS (G130 1055A) observation (lasting 1 orbit). T Pyx was ob served in the Spring 2012 in this way and there were no safety issue using this configuration. Since the system is cooling down, we do not expect the flux to increase, rather the opposite. We request this configuration in order to obtain a spectrum in the FUV from about 900A to 1700A (with gaps) covering the Lyman series. We request the first two visits (1 + 2) to be carried out towards the beginning of Cycle 20 and the last two visits (3 + 4) to be carried out towards the end of Cycle 20. We set up the observations windows accordingly based on the visit planner results. Visit 2 has been grouped with visit 1; and visit 4 has been grouped with visit 3. We request Visit 2 to follow visit 1 immediately, and visit 4 to follow visit 3 immediately. We are aware that the configuration COS 130M 1055A does not yet have a formal automated (pipeline) callibration process and that we may have to wait (we were told it should be taken care of in Summer 2012). We have already worked closely with Steven Pendon from the COS team to work around this callibration problem. Steven HOT STARS 12 false 0.0 0.0 false false false false SUPPORTED STAR ACCRETION DISK CLASSICAL NOVA RECURRENT NOVA This object was generated by the targetselector and retrieved from the SIMBAD database. J2000 J2000 COS/FUV Spectroscopic No No G130M 1055 COS/FUV Spectroscopic No No G130M 1055 STIS/FUV-MAMA Spectroscopic No No G140L 1425 STIS/FUV-MAMA Spectroscopic No No G140L 1425 Timing link suitability includes constraints ([Group (01 02) Within 0.1 days] [02 After 01 by 0.1 to 0.1 days]) The scheduling data was generated by CASM 20.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 12890 :visit-id "01" :proposal-version -1 :trans-version "20120802" :date "04-Sep-2012 14:27:59.0" :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 1165936 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 12890 :visit-id "01" :obset-id "01" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 12890 :visit-id "01" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2934 :al-overhead-at-end 0 :internal-dur-at-end 316 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3267 :pcs-gap 0 ) (Tic-Orbit :proposal-id 12890 :visit-id "01" :orbit-number 2 :pcs-time 222 :si-vis-utilization 3045 :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 3267 :pcs-gap 0 ) true 2 0 Timing link suitability includes constraints ([Group (01 02) Within 0.1 days] [02 After 01 by 0.1 to 0.1 days]) The scheduling data was generated by CASM 20.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 12890 :visit-id "02" :proposal-version -1 :trans-version "20120802" :date "21-Aug-2012 12:31:45.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "31" :si-bright-earth-limb-angle 20.0 :data-volume 330560 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 12890 :visit-id "02" :obset-id "02" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 12890 :visit-id "02" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2914 :al-overhead-at-end 0 :internal-dur-at-end 442 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3267 :pcs-gap 0 ) true 1 0 Timing link suitability includes constraints ([04 After 03 by 0.1 to 0.1 days]) The scheduling data was generated by CASM 20.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 12890 :visit-id "03" :proposal-version -1 :trans-version "20120604" :date "11-Jun-2012 15:15:51.0" :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 1165936 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 12890 :visit-id "03" :obset-id "03" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 12890 :visit-id "03" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2934 :al-overhead-at-end 0 :internal-dur-at-end 316 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3267 :pcs-gap 0 ) (Tic-Orbit :proposal-id 12890 :visit-id "03" :orbit-number 2 :pcs-time 222 :si-vis-utilization 3045 :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 3267 :pcs-gap 0 ) true 2 0 Timing link suitability includes constraints ([04 After 03 by 0.1 to 0.1 days]) The scheduling data was generated by CASM 20.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 12890 :visit-id "04" :proposal-version -1 :trans-version "20120802" :date "21-Aug-2012 12:32:43.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "31" :si-bright-earth-limb-angle 20.0 :data-volume 330560 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 12890 :visit-id "04" :obset-id "04" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 12890 :visit-id "04" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2914 :al-overhead-at-end 0 :internal-dur-at-end 442 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3267 :pcs-gap 0 ) true 1 0