Thank yoyu for your comments, we make updates according to your suggestions. The science case is to monitor variability. We have 3 visits grouped within 7 days. Each visit is 5 orbits long. We choose 1000 s exposures. We would be grateful if you could check whether this is sensible choise. Our s/n requirement can also be reached within shorter exposures. August 2020: this is a resubmission of Phase II with the optimized observation strategy 18 September 2020: the Second Visit has failed. Upon submitting a HOPR, three HST orbits were approved to partly repeat Visit 2. The three orbits should be scheduled consequently: since we monitor UV stellar widn line variability, this is important reqest for our science. -1382777309 ----- Attempting Submission 4 (Thu Mar 19 17:41:59 GMT 2020) ----- ----- Attempting Submission 5 (Fri Aug 07 15:19:48 GMT 2020) ----- ----- Attempting Submission 6 (Fri Sep 18 09:32:02 GMT 2020) ----- Tight surveillance of the exemplary O star zeta Ophiuchi with XMM-Newton and HST We propose a novel and decisive experiment that relies on the unrivaled joint capabilities of XMM and HST. The closest O-type star, zeta Oph, shall be observed continuously over its rotational period to reveal the physics of stellar wind heating. We will discriminate between alternative models for X-ray production in O stars: the hot plasma is generated either in stochastic wind shocks or in corotating interaction regions. The new superb X-ray image will probe the physical conditions in the circumstellar matter of an O star. No similar observations were performed before on a massive star. Observing zeta Oph for 80ks with XMM and 15 HST orbits will allow to study correlated X-ray and UV variability and achieve a breakthrough in our understanding of O stars. 1) The program is joint with XMM-Newton to search for correlated variability in X-rays and UV. We do not request striktly similtaneous observations, but we need to schedule them as close as possible. Ideally, of course, would be simultaneous. 2) Following the advice, we now relaxed the grouping constrained to 7 days. 3) We request 3 groups 5 subsequent orbits each. 4) This is not the final version of phase II, please help with organizing subsequent visits such that ACQ is not performed anew each orbit. August 2020: This is updated Phase II with optimized observational strategy 18 September 2020: t he Second Visit failed. Upon submitting a HOPR, three HST orbits were approved to partly repeat Visit 2. The three orbits should be scheduled consequently, since we monitor UV stellar widn line variability, this is important reqest for our science. None Required Stellar Physics and Stellar Types 6 false false false false false false 75 true SUPPORTED STAR OE NO This object was generated by the targetselector and retrieved from the SIMBAD database. HD149757 J2000 STIS/FUV-MAMA Spectroscopic No No E140M 1425 Timing link suitability includes constraints ([Group (01 02 03) Within 7.0 days] [Group (01 03 04) Within 7.0 days]) The scheduling data was generated by CASM 28.2. CASM was run in Phase II mode. 1599580081000 96.86669060444052 (Tic-Visit :proposal-id 16060 :visit-id "01" :proposal-version -1 :trans-version "20200619" :date "18-Sep-2020 11:24:15.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 5 :saa-model "24" :si-bright-earth-limb-angle 20.0 :data-volume 1409664 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 16060 :visit-id "01" :obset-id "01" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 16060 :visit-id "01" :orbit-number 1 :pcs-time 393 :si-vis-utilization 2752 :al-overhead-at-end 114 :internal-dur-at-end 132 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3149 :pcs-gap 0 ) (Tic-Orbit :proposal-id 16060 :visit-id "01" :orbit-number 2 :pcs-time 392 :si-vis-utilization 2755 :al-overhead-at-end 114 :internal-dur-at-end 132 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3149 :pcs-gap 0 ) (Tic-Orbit :proposal-id 16060 :visit-id "01" :orbit-number 3 :pcs-time 392 :si-vis-utilization 2755 :al-overhead-at-end 114 :internal-dur-at-end 132 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3149 :pcs-gap 0 ) (Tic-Orbit :proposal-id 16060 :visit-id "01" :orbit-number 4 :pcs-time 392 :si-vis-utilization 2755 :al-overhead-at-end 114 :internal-dur-at-end 132 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3149 :pcs-gap 0 ) (Tic-Orbit :proposal-id 16060 :visit-id "01" :orbit-number 5 :pcs-time 392 :si-vis-utilization 2755 :al-overhead-at-end 114 :internal-dur-at-end 394 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3149 :pcs-gap 0 ) true 5 0 Timing link suitability includes constraints ([Group (01 02 03) Within 7.0 days]) The scheduling data was generated by CASM 28.2. CASM was run in Phase II mode. 1599665892000 96.67211903596922 (Tic-Visit :proposal-id 16060 :visit-id "02" :proposal-version -1 :trans-version "20200619" :date "07-Aug-2020 17:16:15.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 5 :saa-model "24" :si-bright-earth-limb-angle 20.0 :data-volume 1409664 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 16060 :visit-id "02" :obset-id "02" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 16060 :visit-id "02" :orbit-number 1 :pcs-time 393 :si-vis-utilization 2752 :al-overhead-at-end 114 :internal-dur-at-end 132 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3149 :pcs-gap 0 ) (Tic-Orbit :proposal-id 16060 :visit-id "02" :orbit-number 2 :pcs-time 392 :si-vis-utilization 2755 :al-overhead-at-end 114 :internal-dur-at-end 132 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3149 :pcs-gap 0 ) (Tic-Orbit :proposal-id 16060 :visit-id "02" :orbit-number 3 :pcs-time 392 :si-vis-utilization 2755 :al-overhead-at-end 114 :internal-dur-at-end 132 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3149 :pcs-gap 0 ) (Tic-Orbit :proposal-id 16060 :visit-id "02" :orbit-number 4 :pcs-time 392 :si-vis-utilization 2755 :al-overhead-at-end 114 :internal-dur-at-end 132 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3149 :pcs-gap 0 ) (Tic-Orbit :proposal-id 16060 :visit-id "02" :orbit-number 5 :pcs-time 392 :si-vis-utilization 2755 :al-overhead-at-end 114 :internal-dur-at-end 394 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3149 :pcs-gap 0 ) true 5 0 Timing link suitability includes constraints ([Group (01 02 03) Within 7.0 days] [Group (01 03 04) Within 7.0 days]) The scheduling data was generated by CASM 28.2. CASM was run in Phase II mode. 1599740373000 96.50244140544157 (Tic-Visit :proposal-id 16060 :visit-id "03" :proposal-version -1 :trans-version "20200619" :date "18-Sep-2020 11:24:43.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 5 :saa-model "24" :si-bright-earth-limb-angle 20.0 :data-volume 1409664 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 16060 :visit-id "03" :obset-id "03" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 16060 :visit-id "03" :orbit-number 1 :pcs-time 393 :si-vis-utilization 2752 :al-overhead-at-end 114 :internal-dur-at-end 132 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3149 :pcs-gap 0 ) (Tic-Orbit :proposal-id 16060 :visit-id "03" :orbit-number 2 :pcs-time 392 :si-vis-utilization 2755 :al-overhead-at-end 114 :internal-dur-at-end 132 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3149 :pcs-gap 0 ) (Tic-Orbit :proposal-id 16060 :visit-id "03" :orbit-number 3 :pcs-time 392 :si-vis-utilization 2755 :al-overhead-at-end 114 :internal-dur-at-end 132 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3149 :pcs-gap 0 ) (Tic-Orbit :proposal-id 16060 :visit-id "03" :orbit-number 4 :pcs-time 392 :si-vis-utilization 2755 :al-overhead-at-end 114 :internal-dur-at-end 132 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3149 :pcs-gap 0 ) (Tic-Orbit :proposal-id 16060 :visit-id "03" :orbit-number 5 :pcs-time 392 :si-vis-utilization 2755 :al-overhead-at-end 114 :internal-dur-at-end 394 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3149 :pcs-gap 0 ) true 5 0 Timing link suitability includes constraints ([Group (01 03 04) Within 7.0 days]) The scheduling data was generated by CASM 28.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 16060 :visit-id "04" :proposal-version -1 :trans-version "20200619" :date "18-Sep-2020 11:23:16.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 3 :saa-model "24" :si-bright-earth-limb-angle 20.0 :data-volume 818176 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 16060 :visit-id "04" :obset-id "04" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 16060 :visit-id "04" :orbit-number 1 :pcs-time 393 :si-vis-utilization 2752 :al-overhead-at-end 114 :internal-dur-at-end 132 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3149 :pcs-gap 0 ) (Tic-Orbit :proposal-id 16060 :visit-id "04" :orbit-number 2 :pcs-time 392 :si-vis-utilization 2755 :al-overhead-at-end 114 :internal-dur-at-end 132 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3149 :pcs-gap 0 ) (Tic-Orbit :proposal-id 16060 :visit-id "04" :orbit-number 3 :pcs-time 392 :si-vis-utilization 2755 :al-overhead-at-end 114 :internal-dur-at-end 394 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3149 :pcs-gap 0 ) true 3 0