Hydrogen-deficient central stars of planetary nebulae: testing the post-AGB evolution and s-process production

For G160M observations, please consult Chapter 9 of the COS Instrument Handbook to estimate overheads and the number of exposures per orbit, and consequently the correct lifetime position. Use of LP4 with G160M requires justification in the "Special Requirements" section of the Phase I PDF. Use of the default LP6 with G160M requires no justification. Proposals can be submitted with the warning present. For G160M observations, please consult Chapter 9 of the COS Instrument Handbook to estimate overheads and the number of exposures per orbit, and consequently the correct lifetime position. Use of LP4 with G160M requires justification in the "Special Requirements" section of the Phase I PDF. Use of the default LP6 with G160M requires no justification. Proposals can be submitted with the warning present. For G160M observations, please consult Chapter 9 of the COS Instrument Handbook to estimate overheads and the number of exposures per orbit, and consequently the correct lifetime position. Use of LP4 with G160M requires justification in the "Special Requirements" section of the Phase I PDF. Use of the default LP6 with G160M requires no justification. Proposals can be submitted with the warning present. 0 Assigned ID: 5372 ----- Attempting Submission 1 (Tue Mar 26 09:32:24 GMT 2024) ----- HST Phase I Proposal 5372 successfully submitted. Receipt: # 5372-1 ----- Attempting Submission 2 (Tue Mar 26 19:09:00 GMT 2024) ----- HST Phase I Proposal 5372 successfully submitted. Receipt: # 5372-2 Based on the policies in Sect. 9.5.1 of the COS Instrument Handbook we ask for LP4 for our three G160M observations. Dear Tala, I've updated the APT Phase II proposal vor VISIT 13 by taking the recommendations about ACQ/PEAK and Buffer time (now set to 286 s for both Exposures 4 & 5) into account. Thanks again and best wishes, Helge -1250351500 ----- Attempting Submission 1 (Fri Aug 16 13:16:07 GMT 2024) ----- HST Phase II Proposal 17754 successfully submitted. Receipt: # 17754-1 ----- Attempting Submission 2 (Fri Dec 13 16:06:45 GMT 2024) ----- HST Phase II Proposal 17754 successfully submitted. Receipt: # 17754-2 ----- Attempting Submission 3 (Mon Dec 16 13:57:43 GMT 2024) ----- ----- Attempting Submission 4 (Wed Dec 17 16:19:25 GMT 2025) ----- All given exposure times are multiples of 0.1 s or even integer. Not clear, why this warning shows up. Hydrogen-deficient central stars of planetary nebulae: testing the post-AGB evolution and s-process production Asymptotic-giant-branch (AGB) stars are the primary production sites for carbon and s-process elements in the Universe. After leaving the AGB, such a star eventually becomes the central star of a planetary nebula (CSPN). In most cases the nuclearly processed material remains trapped beneath a hydrogen-rich envelope. However, about 20% of CSPNe display H-deficient and helium- and carbon-rich atmospheres. They have emission-line spectra, resembling those of massive Wolf-Rayet stars, and are classified as [WC] objects. Their spectra indicate strong mass-loss, delivering carbon and heavy elements to the interstellar medium and future stellar generations. How these [WC]-type CSPNe lost their hydrogen, by blowing off their envelopes, and/or by ingesting them, is still poorly understood. Various evolutionary scenarios, involving helium-shell thermal pulses, predict very distinct chemical compositions. Spectroscopic analyses are needed to decide between these scenarios, and to quantify chemical feedback from these stars. Such analyses are best carried out using UV spectra, which are crucial both for stellar-wind modeling and for quantitative determination of chemical abundances. However, UV data of sufficient quality exist only for a very few [WC]-type CSPN. We propose to obtain UV spectra for a comprehensive sample of 13 [WC]-type CSPNe, using COS and STIS (23 HST orbits), and covering all of the subtypes of [WC] stars. For the analysis, we will use state-of-the-art non-LTE model-atmosphere codes, which account for complex model atoms, and will provide abundances for key chemical elements. The UV data will be complemented by optical spectra, already available. We propose to observe 13 targets in individual visits, requiring 23 HST orbits. The early subtypes ([WCE]) have fast winds that broaden the spectral lines, and hence medium-resolution spectra are perfectly sufficient. In general, we will employ the COS grating G140L. We chose $\lambda_{\rm c}$ = 800\,\AA, i.e., a spectral range 913 -- 1950\,\AA\ on detector A, while detector B is off. Thus we fully cover the important N\,{\sc v} resonance line, while sacrificing some less interesting region at the long-wavelength end. For four of our [WCE] targets, we additionally propose to employ grating G230L with $\lambda_{\rm c}$ = 3360\,\AA. These exposures aim mainly at the strong Ne\,{\sc vi} complex at 2222 -- 2228\,\AA, because the neon abundance is an important discriminator between the debated [WC] formation channels. [WCL] winds are slower, and therefore a higher spectral resolution is preferred unless the target is too faint for that. For three of the [WCL] we propose exposures with G130M and G140M, covering together the range from 1132 -- 1772\,\AA\ (with two small gaps). The exposure times are mainly estimated from existing IUE observations. Fitting preliminary models of the spectral energy distribution to the observations over a large wavelength range gives additional safety and has been performed for all targets, as demonstrated for one example. The IUE data as well as (preliminary) model spectra have been uploaded to the ETC for calculating the exposure times, aiming on a S/N of about 20 and better. We carefully checked that the emission lines (stellar and nebular) stay below the bright object limit, taking into account that nebular lines may peak higher than in \IUE\/ spectra due to the higher spectral resolution. The nebular Ly$\alpha$ emission will be masked by the interstellar absorption, since our targets have a color excess of $E(B-V) \geq 0.24\,$mag. The only challenging object is NCG\,2867 with its nebular C\,{\sc iv}\,$\lambda$\,1548 emission. While this line marginally hits the bright pixel limit if using the \IUE\/ spectra for the ETC, the much smaller COS aperture of 2.5\arcsec\ compared to the 11\arcsec\ diameter of the PN (fully included in the IUE aperture) will sufficiently reduce the nebular contamination and thus mitigate the problem. H. Todt, W.-R. Hamann, and A. Sander are experts in the field of modelling expanding stellar atmospheres and developers of the Potsdam Wolf-Rayet model atmosphere code (PoWR) with extensive experience in analyes of UV spectra. H. Todt has published analyses of [Wolf-Rayet]-type central stars of planetary nebulae, A. Sander is one of the leading experts on hydrodynamically self-consistent model atmospheres. M.M. Miller Bertolami and T. Battich are experts on modelling of the late stages of low-mass stars including hydrogen-deficient central stars. J.A. Toala is an expert on radiation-hydrodynamic simulations of the formation and evolution of planetary nebulae. J.A. Toala also has wide experience in the analysis of X-ray (XMM-Newton and Chandra) data as well as optical and IR observations of planetary nebuale and Wolf-Rayet nebulae. M. Guerrero is an experienced observer of planetary nebulae in optical, UV, and X-ray. M. Pena and L. Sabin are experts on spectral analysis of planetary nebulae. Howard E. Bond (Professor of Practice, Pennsylvania State University and Astronomer Emeritus, Space Telescope Science Institute) has extensive experience with HST observing. He specializes in stellar astronomy and has authored or coauthored over 250 refereed publications, with over 13,000 citations. K. Werner is an expert in modelling spectra of H-deficient low-mass stars and analyses of UV spectra. K. Werner is the developer of the TMAP code for NLTE stellar atmospheres. All team members have a good record of previous successful collaborations including HST observations. Stellar Physics and Stellar Types Stellar Populations and the Interstellar Medium 6 false true false false false false AVAILABLE STAR EMISSION LINE STAR PLANETARY NEBULA CENTRAL STAR NO This object was generated by the targetselector and retrieved from the SIMBAD database. J2000 J2000 STAR EMISSION LINE STAR PLANETARY NEBULA CENTRAL STAR NO This object was generated by the targetselector and retrieved from the SIMBAD database. J2000 J2000 STAR EMISSION LINE STAR PLANETARY NEBULA CENTRAL STAR NO This object was generated by the targetselector and retrieved from the SIMBAD database. J2000 J2000 STAR EMISSION LINE STAR PLANETARY NEBULA CENTRAL STAR NO This object was generated by the targetselector and retrieved from the SIMBAD database. J2000 J2000 STAR EMISSION LINE STAR PLANETARY NEBULA CENTRAL STAR NO This object was generated by the targetselector and retrieved from the SIMBAD database. J2000 J2000 STAR EMISSION LINE STAR PLANETARY NEBULA CENTRAL STAR NO This object was generated by the targetselector and retrieved from the SIMBAD database. J2000 J2000 STAR EMISSION LINE STAR PLANETARY NEBULA CENTRAL STAR NO This object was generated by the targetselector and retrieved from the SIMBAD database. J2000 J2000 STAR EMISSION LINE STAR PLANETARY NEBULA CENTRAL STAR NO This object was generated by the targetselector and retrieved from the SIMBAD database. J2000 J2000 STAR EMISSION LINE STAR PLANETARY NEBULA CENTRAL STAR NO This object was generated by the targetselector and retrieved from the SIMBAD database. J2000 J2000 STAR EMISSION LINE STAR PLANETARY NEBULA CENTRAL STAR NO This object was generated by the targetselector and retrieved from the SIMBAD database. J2000 J2000 STAR EMISSION LINE STAR PLANETARY NEBULA CENTRAL STAR NO This object was generated by the targetselector and retrieved from the SIMBAD database. Parallax in Gaia is negative, value of 0.00016 estimated from our distance estimate in Sabin et al. (2022) J2000 J2000 STAR EMISSION LINE STAR PLANETARY NEBULA CENTRAL STAR NO This object was generated by the targetselector and retrieved from the SIMBAD database. PN-G056.1-03.8 J2000 J2000 STAR EMISSION LINE STAR NO This object was generated by the targetselector and retrieved from the SIMBAD database. SIMBAD listed proper motion for this target. When retrieving targets with PM from SIMBAD, APT requests the coordinates be calculated with an epoch of the year 2000. Do not modify this epoch. Always review coordinates using the Target Confirmation tool, which graphically displays the PM. J2000 J2000 COS/FUV Spectroscopic No No G140L 1105 COS/NUV Spectroscopic No No G230L 3360 COS/FUV Spectroscopic No No G140L 1105 COS/FUV Spectroscopic No No G140L 1105 COS/NUV Spectroscopic No No G230L 3360 COS/FUV Spectroscopic No No G140L 1105 COS/FUV Spectroscopic No No G130M 1096 COS/NUV Spectroscopic No No G230L 3360 COS/FUV Spectroscopic No No G140L 1105 COS/FUV Spectroscopic No No G140L 1105 COS/FUV Spectroscopic No No G130M 1291 COS/FUV Spectroscopic No No G160M 1600 COS/FUV Spectroscopic No No G130M 1291 COS/FUV Spectroscopic No No G160M 1600 COS/FUV Spectroscopic No No G130M 1291 COS/FUV Spectroscopic No No G160M 1600 COS/FUV Spectroscopic No No G140L 800 COS/NUV Spectroscopic No No G230L 3360 COS/NUV Spectroscopic No No G230L 3360 COS/FUV Spectroscopic No No G140L 800 COS/NUV Spectroscopic No No G230L 3360 STIS/FUV-MAMA Spectroscopic No No E140M 1425 1723808310747 The scheduling data was generated by CASM 32.1.3. CASM was run in Phase II mode. 1736413632000 332.42644657956953 (Tic-Visit :proposal-id 17754 :visit-id "01" :proposal-version -1 :trans-version "20240604" :date "16-Aug-2024 13:38:30.0" :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 191616 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 17754 :visit-id "01" :obset-id "01" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 17754 :visit-id "01" :orbit-number 1 :pcs-time 380 :si-vis-utilization 2713 :al-overhead-at-end 0 :internal-dur-at-end 360 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3099 :pcs-gap 0 ) false 1 0 tested t_exp=52 s with IUE+FUSE flux : 1933293 SN 28.5 for 912 s at 2200 tested with FUSE+IUE for 952 s 1933303 SN 27.5 for 544 s at 1400 Ang tested with FUSE+IUE 1933302 for 584s 1723808923085 The scheduling data was generated by CASM 32.1.3. CASM was run in Phase II mode. 1742781927000 304.35411262055277 (Tic-Visit :proposal-id 17754 :visit-id "02" :proposal-version -1 :trans-version "20240604" :date "16-Aug-2024 13:48:43.0" :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 295936 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 17754 :visit-id "02" :obset-id "02" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 17754 :visit-id "02" :orbit-number 1 :pcs-time 380 :si-vis-utilization 2679 :al-overhead-at-end 0 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3062 :pcs-gap 0 ) (Tic-Orbit :proposal-id 17754 :visit-id "02" :orbit-number 2 :pcs-time 380 :si-vis-utilization 2679 :al-overhead-at-end 0 :internal-dur-at-end 388 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3062 :pcs-gap 0 ) false 2 0 SN=18.4 for 1916 s at 1400 Ang SN=12.6 for 2332 s at 2300 Ang 1723809351159 The scheduling data was generated by CASM 32.1.3. CASM was run in Phase II mode. 1749527274000 108.0557618284488 (Tic-Visit :proposal-id 17754 :visit-id "03" :proposal-version -1 :trans-version "20240604" :date "16-Aug-2024 13:55:51.0" :trans-errors '(:WARNINGS 1 :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 261184 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 17754 :visit-id "03" :obset-id "03" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 17754 :visit-id "03" :orbit-number 1 :pcs-time 380 :si-vis-utilization 2718 :al-overhead-at-end 0 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3099 :pcs-gap 0 ) (Tic-Orbit :proposal-id 17754 :visit-id "03" :orbit-number 2 :pcs-time 380 :si-vis-utilization 2719 :al-overhead-at-end 0 :internal-dur-at-end 388 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3099 :pcs-gap 0 ) false 2 0 SN 18.6 for 1976s at 1400 Ang SN 17. for 2372 s at 2100 Ang 1723809586359 The scheduling data was generated by CASM 32.1.3. CASM was run in Phase II mode. 1734934485000 137.52381308107903 (Tic-Visit :proposal-id 17754 :visit-id "04" :proposal-version -1 :trans-version "20240604" :date "16-Aug-2024 13:59:46.0" :trans-errors '(:WARNINGS 1 :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 121920 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 17754 :visit-id "04" :obset-id "04" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 17754 :visit-id "04" :orbit-number 1 :pcs-time 380 :si-vis-utilization 2736 :al-overhead-at-end 0 :internal-dur-at-end 369 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3119 :pcs-gap 0 ) false 1 0 20.6 for 2000 s at 1400 Ang 1723809999495 The scheduling data was generated by CASM 32.1.3. CASM was run in Phase II mode. 1741750642000 271.0249428197769 (Tic-Visit :proposal-id 17754 :visit-id "05" :proposal-version -1 :trans-version "20240604" :date "16-Aug-2024 14:06:39.0" :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 330688 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 17754 :visit-id "05" :obset-id "05" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 17754 :visit-id "05" :orbit-number 1 :pcs-time 380 :si-vis-utilization 2625 :al-overhead-at-end 0 :internal-dur-at-end 398 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3010 :pcs-gap 0 ) false 1 0 SN 32.7 for 256 s at 2200 Ang SN 29.0 for 1080 s at 1120 Ang 1723810179866 The scheduling data was generated by CASM 32.1.3. CASM was run in Phase II mode. 1747045426000 246.49342365781473 (Tic-Visit :proposal-id 17754 :visit-id "06" :proposal-version -1 :trans-version "20240604" :date "16-Aug-2024 14:09:39.0" :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 121920 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 17754 :visit-id "06" :obset-id "06" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 17754 :visit-id "06" :orbit-number 1 :pcs-time 380 :si-vis-utilization 2652 :al-overhead-at-end 0 :internal-dur-at-end 57 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3032 :pcs-gap 0 ) (Tic-Orbit :proposal-id 17754 :visit-id "06" :orbit-number 2 :pcs-time 380 :si-vis-utilization 2652 :al-overhead-at-end 0 :internal-dur-at-end 369 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3032 :pcs-gap 0 ) false 2 0 SN 20.6 for 4614 s at 1400 Ang 1723810224832 The scheduling data was generated by CASM 32.1.3. CASM was run in Phase II mode. 1738025518000 277.33759516610536 (Tic-Visit :proposal-id 17754 :visit-id "07" :proposal-version -1 :trans-version "20240604" :date "16-Aug-2024 14:10:24.0" :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 121920 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 17754 :visit-id "07" :obset-id "07" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 17754 :visit-id "07" :orbit-number 1 :pcs-time 380 :si-vis-utilization 2697 :al-overhead-at-end 0 :internal-dur-at-end 369 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3078 :pcs-gap 0 ) false 1 0 SN 20.6 for 1992 s at 1400 Ang 1734105177658 The scheduling data was generated by CASM 32.1.3. CASM was run in Phase II mode. 1739657530000 275.7560460991075 (Tic-Visit :proposal-id 17754 :visit-id "08" :proposal-version -1 :trans-version "20240604" :date "13-Dec-2024 16:52:57.0" :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 122048 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 17754 :visit-id "08" :obset-id "08" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 17754 :visit-id "08" :orbit-number 1 :pcs-time 380 :si-vis-utilization 2652 :al-overhead-at-end 0 :internal-dur-at-end 350 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3032 :pcs-gap 0 ) false 1 0 SNR = 21.3 for 1270 s at 1300 Ang SNR = 21.3 for 1270 s at 1300 Ang SN 11.1 for 336 s at 1510 Ang 1734105177658 1744712387000 282.4512781475565 (Tic-Visit :proposal-id 17754 :visit-id "08" :proposal-version -1 :trans-version "20240604" :date "13-Dec-2024 16:52:57.0" :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 122048 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 17754 :visit-id "08" :obset-id "08" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 17754 :visit-id "08" :orbit-number 1 :pcs-time 380 :si-vis-utilization 2652 :al-overhead-at-end 0 :internal-dur-at-end 350 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3032 :pcs-gap 0 ) false 1 0 SNR = 21.3 for 1270 s at 1300 Ang SNR = 21.3 for 1270 s at 1300 Ang SN 11.1 for 336 s at 1510 Ang 1734357289678 The scheduling data was generated by CASM 32.1.3. CASM was run in Phase II mode. 1739663355000 261.8679133728218 (Tic-Visit :proposal-id 17754 :visit-id "09" :proposal-version -1 :trans-version "20240604" :date "16-Dec-2024 14:54:49.0" :trans-errors '(:WARNINGS 1 :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 139424 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 17754 :visit-id "09" :obset-id "09" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 17754 :visit-id "09" :orbit-number 1 :pcs-time 380 :si-vis-utilization 2718 :al-overhead-at-end 0 :internal-dur-at-end 350 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3099 :pcs-gap 0 ) false 1 0 SN 16.9 for 980 s at 1400 Ang SNR = 16.9 for 980 s at 1400 Ang SN 16.3 for 684 s at 1500 Ang 1734357289678 1744916001000 298.053585743659 (Tic-Visit :proposal-id 17754 :visit-id "09" :proposal-version -1 :trans-version "20240604" :date "16-Dec-2024 14:54:49.0" :trans-errors '(:WARNINGS 1 :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 139424 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 17754 :visit-id "09" :obset-id "09" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 17754 :visit-id "09" :orbit-number 1 :pcs-time 380 :si-vis-utilization 2718 :al-overhead-at-end 0 :internal-dur-at-end 350 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3099 :pcs-gap 0 ) false 1 0 SN 16.9 for 980 s at 1400 Ang SNR = 16.9 for 980 s at 1400 Ang SN 16.3 for 684 s at 1500 Ang 1734101992835 The scheduling data was generated by CASM 32.1.3. CASM was run in Phase II mode. 1754524184000 278.6678153735946 (Tic-Visit :proposal-id 17754 :visit-id "10" :proposal-version -1 :trans-version "20240604" :date "13-Dec-2024 15:59:52.0" :trans-errors '(:WARNINGS 1 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 3 :saa-model "31" :si-bright-earth-limb-angle 20.0 :data-volume 235024 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 17754 :visit-id "10" :obset-id "10" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 17754 :visit-id "10" :orbit-number 1 :pcs-time 380 :si-vis-utilization 2739 :al-overhead-at-end 0 :internal-dur-at-end 105 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3119 :pcs-gap 0 ) (Tic-Orbit :proposal-id 17754 :visit-id "10" :orbit-number 2 :pcs-time 380 :si-vis-utilization 2739 :al-overhead-at-end 0 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3119 :pcs-gap 0 ) (Tic-Orbit :proposal-id 17754 :visit-id "10" :orbit-number 3 :pcs-time 380 :si-vis-utilization 2707 :al-overhead-at-end 0 :internal-dur-at-end 360 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3119 :pcs-gap 0 ) false 3 0 SNR = 17.7 for 5064s at 1400 Ang SN 17.5 for 2296 s at 1500 Ang 1723810818805 The scheduling data was generated by CASM 32.1.3. CASM was run in Phase II mode. 1747056531000 245.55437690356342 (Tic-Visit :proposal-id 17754 :visit-id "11" :proposal-version -1 :trans-version "20240604" :date "16-Aug-2024 14:20:18.0" :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 261184 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 17754 :visit-id "11" :obset-id "11" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 17754 :visit-id "11" :orbit-number 1 :pcs-time 380 :si-vis-utilization 2635 :al-overhead-at-end 0 :internal-dur-at-end 48 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3015 :pcs-gap 0 ) (Tic-Orbit :proposal-id 17754 :visit-id "11" :orbit-number 2 :pcs-time 380 :si-vis-utilization 2634 :al-overhead-at-end 0 :internal-dur-at-end 388 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3015 :pcs-gap 0 ) false 2 0 SN 24.4 for 1920 s at 1400 Ang SN 19.5 for 2264 s at 2200 Ang 1723811275350 The scheduling data was generated by CASM 32.1.3. CASM was run in Phase II mode. 1752054568000 192.3494131048442 (Tic-Visit :proposal-id 17754 :visit-id "12" :proposal-version -1 :trans-version "20240604" :date "16-Aug-2024 14:27:55.0" :trans-errors '(:WARNINGS 1 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 4 :saa-model "31" :si-bright-earth-limb-angle 20.0 :data-volume 504704 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 17754 :visit-id "12" :obset-id "12" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 17754 :visit-id "12" :orbit-number 1 :pcs-time 380 :si-vis-utilization 2642 :al-overhead-at-end 0 :internal-dur-at-end 57 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3023 :pcs-gap 0 ) (Tic-Orbit :proposal-id 17754 :visit-id "12" :orbit-number 2 :pcs-time 380 :si-vis-utilization 2643 :al-overhead-at-end 0 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3023 :pcs-gap 0 ) (Tic-Orbit :proposal-id 17754 :visit-id "12" :orbit-number 3 :pcs-time 380 :si-vis-utilization 2643 :al-overhead-at-end 0 :internal-dur-at-end 48 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3023 :pcs-gap 0 ) (Tic-Orbit :proposal-id 17754 :visit-id "12" :orbit-number 4 :pcs-time 380 :si-vis-utilization 2643 :al-overhead-at-end 0 :internal-dur-at-end 360 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3023 :pcs-gap 0 ) false 4 0 SN 22.8 for 4602 s at 1500 Ang SN 20.5 for 5074 s at 2200 Ang 1765985254591 The scheduling data was generated by CASM 33.1. CASM was run in Phase II mode. /home/crater/htodt/proposals/cspn-proposal2024/OP-cache/cspn-hst2024_phaseII_edited_Dez2025-v13.xml (Tic-Visit :proposal-id 17754 :visit-id "13" :proposal-version -1 :trans-version "20250929" :date "17-Dec-2025 16:27:34.0" :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 1079072 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 17754 :visit-id "13" :obset-id "13" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 17754 :visit-id "13" :orbit-number 1 :pcs-time 380 :si-vis-utilization 2631 :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 3011 :pcs-gap 0 ) (Tic-Orbit :proposal-id 17754 :visit-id "13" :orbit-number 2 :pcs-time 380 :si-vis-utilization 2631 :al-overhead-at-end 0 :internal-dur-at-end 618 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3011 :pcs-gap 0 ) true 2 0 SN 10.5 for 1289 s at 1610 Ang (splitted exposure time) SN 14.9 for 2601 s at 1610 Ang (splitted exposure time) total in STIS.sp.2260432 (SN=18.2)