Scientific Category is a required field. Science Keywords: Select from 2 to 5 items. 0 Assigned ID: 1310 ----- Attempting Submission 1 (Tue Dec 29 14:42:41 GMT 2020) ----- joint 0 ----- Attempting Submission 1 (Mon Feb 01 16:50:26 GMT 2021) ----- HST Phase II Proposal 16490 successfully submitted. Receipt: # 16490-1 ----- Attempting Submission 2 (Wed Feb 17 10:32:25 GMT 2021) ----- HST Phase II Proposal 16490 successfully submitted. Receipt: # 16490-2 ----- Attempting Submission 3 (Fri Mar 12 09:33:05 GMT 2021) ----- We propose joint XMM-Newton (30ks) and HST observations (3 orbits) of the nearby K young star V1298 Tau (~20Myr) hosting four transiting exoplanets discovered with Kepler (K2), and included in a follow-up optical/IR campaign with HARPS-N and GIANO-B@TNG. These young planets have radii between 5.6 and 10.3 R Earth and they are located between 0.08 and ~0.3 AU from the host. They are still experiencing the contraction phase toward their final sizes and are subject to photoevaporation effects at different rates. Our immediate objective is to reconstruct the full XUV spectrum, and to assess the spectral and time variability of the host star. In this way we will characterize its activity level and the dose of highenergy radiation received by those very young planets. We ask observations with HST/COS joint and simultaneous with XMM-Newton observations of the young K-type star V1298 Tau. We aim to acquire high resolution spectra in the band 1180 - 1450 Angstrom with the G130M grating (central wavelength of 1291 Angstrom) during 3 HST orbits. The declination of the star ensures an average HST visibility of 54' per orbit, available for science exposures. We intend to measure the intensity of ion lines from Si II, Si III, Si IV, CII , CIII, NV falling in the above wavelength range. na 6 false false false false false false false SUPPORTED STAR CORONA EXTRA-SOLAR PLANETARY SYSTEM K V-IV NO J2000 J2000 COS/FUV Spectroscopic No No G130M 1309 1624968392024 /private/var/folders/q9/0jb3sqc10kx2dw3wnl21b_dw000702/T/OPVisit2712479631126328284.xml The scheduling data was generated by CASM 29.0. CASM was run in Phase II mode. 51.5 (Tic-Visit :proposal-id 16490 :visit-id "01" :proposal-version -1 :trans-version "20200619" :date "29-Jun-2021 08:06:31.0" :trans-errors '(:WARNINGS 0 :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 504512 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 16490 :visit-id "01" :obset-id "01" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 16490 :visit-id "01" :orbit-number 1 :pcs-time 393 :si-vis-utilization 2697 :al-overhead-at-end 0 :internal-dur-at-end 114 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3090.0 :pcs-gap 0 ) (Tic-Orbit :proposal-id 16490 :visit-id "01" :orbit-number 2 :pcs-time 392 :si-vis-utilization 2698 :al-overhead-at-end 0 :internal-dur-at-end 124 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3090.0 :pcs-gap 0 ) (Tic-Orbit :proposal-id 16490 :visit-id "01" :orbit-number 3 :pcs-time 392 :si-vis-utilization 2698 :al-overhead-at-end 0 :internal-dur-at-end 417 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3090.0 :pcs-gap 0 ) true 3 0