0 Assigned ID: 1125 ----- Attempting Submission 1 (Fri Apr 07 23:33:28 GMT 2017) ----- HST Phase I Proposal 1125 (new_dash2.apt) successfully submitted. Receipt: # 1125-1 For the best data quality, it is strongly recommended that the maximum number of allowed FP-POS positions is used when observing at a given COS CENWAVE setting. See full description for details. For the best data quality, it is strongly recommended that the maximum number of allowed FP-POS positions is used when observing at a given COS CENWAVE setting. See full description for details. For the best data quality, it is strongly recommended that the maximum number of allowed FP-POS positions is used when observing at a given COS CENWAVE setting. See full description for details. For the best data quality, it is strongly recommended that the maximum number of allowed FP-POS positions is used when observing at a given COS CENWAVE setting. See full description for details. 0 ----- Attempting Submission 1 (Thu Jul 20 21:10:56 GMT 2017) ----- ----- Attempting Submission 2 (Mon Oct 16 15:36:07 GMT 2017) ----- Warnings have to do with FP-POS setting different than "ALL", chosen because we use the G130M/1291 setting. Mapping the structure and kinematics of NGC 1624-2's giant magnetosphere We propose to obtain phase-resolved COS observations of the extraordinary magnetic star NGC 1624-2, which has the strongest magnetic field ever detected in an O-type star, by nearly an order of magnitude. Two COS observations, obtained at rotational phases when the magnetic field is closest to pole-on and equator-on, respectively, revealed a remarkable variation of the wind line profiles, caused by the magnetically-imposed break of spherical symmetry in the kinematics, density, and ionization structure of the stellar wind. With 4 new observations, we will now monitor the variation of the UV line profiles over the whole stellar rotation to map the complex structure of NGC 1624-2's enormous magnetosphere, which represents a new regime of extreme wind confinement that will test the limits of the current theory of magnetized stellar winds. Our program requires time-critical observations of NGC 1624-2 at four rotational phases, as described below. For each of these observations, we aim to investigate important photospheric, wind, and magnetospheric features such as N V 1239,1243 A, Si IV 1393,1403 A, C IV 1548,1550 AA, N IV 1718 A. NGC 1624-2, with V=11.77, E(B-V)=0.9, will therefore be optimally observed at the COS medium resolution with the G130M (settings 1223, 1291 A) and G160M (1577, 1623 A) gratings for the maximum available, quasi-uninterrupted wavelength coverage of 1135 - 1798 A (with a small gap at 1214 - 1218 A). Two orbits in each of the four visits at phases 0.26, 0.38, 0.63 and 0.91 will be required, as follows. The visibility period is 57 min. Guide star acquisition consumes 6 min and COS imaging target acquisition another 3 min of the first orbit. COS overheads for the required 4-setting sequence are 5+3=8 min in the first orbit, but only 3 min in the second because a setting change can be done during the occultation. Guide star reacquisition requires only 4 min in the second orbit, and the target acquisition is not repeated. Thus, 40 min remain for G130M exposure in the first orbit, and 50 min for G160M in the second. For a spectral type of O7 and the above photometry, the COS ETC predicts S/N of 26 and 28 per resolution element, respectively, sufficient for our objectives. The ephemeris for NGC 1624-2 is JD = 2455967.0 (+/-10) + 157.99 (+/-0.94) x E (Wade et al. 2012). A tolerance of +-0.05 cycles around the desired phases leads to periodic observational windows of 2 weeks that are consistent with these constraints. Stellar Physics 6 false true false false false false SUPPORTED STAR OF NO This object was generated by the targetselector and retrieved from the SIMBAD database. J04403728+5027410 J2000 J2000 COS/FUV Spectroscopic No No G130M 1291 COS/FUV Spectroscopic No No G130M 1327 COS/FUV Spectroscopic No No G160M 1577 COS/FUV Spectroscopic No No G160M 1623 COS/FUV Spectroscopic No No G130M 1291 COS/FUV Spectroscopic No No G130M 1327 COS/FUV Spectroscopic No No G160M 1577 COS/FUV Spectroscopic No No G160M 1623 COS/FUV Spectroscopic No No G130M 1291 COS/FUV Spectroscopic No No G130M 1327 COS/FUV Spectroscopic No No G160M 1577 COS/FUV Spectroscopic No No G160M 1623 COS/FUV Spectroscopic No No G130M 1291 COS/FUV Spectroscopic No No G130M 1327 COS/FUV Spectroscopic No No G160M 1577 COS/FUV Spectroscopic No No G160M 1623 The scheduling data was generated by CASM 25.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 15066 :visit-id "01" :proposal-version -1 :trans-version "20170613" :date "20-Jul-2017 16:44:50.0" :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 296192 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 15066 :visit-id "01" :obset-id "01" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 15066 :visit-id "01" :orbit-number 1 :pcs-time 333 :si-vis-utilization 3045 :al-overhead-at-end 0 :internal-dur-at-end 67 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3393 :pcs-gap 0 ) (Tic-Orbit :proposal-id 15066 :visit-id "01" :orbit-number 2 :pcs-time 222 :si-vis-utilization 3150 :al-overhead-at-end 0 :internal-dur-at-end 341 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3393 :pcs-gap 0 ) false 2 0 The scheduling data was generated by CASM 25.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 15066 :visit-id "02" :proposal-version -1 :trans-version "20170613" :date "20-Jul-2017 16:44:53.0" :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 296192 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 15066 :visit-id "02" :obset-id "02" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 15066 :visit-id "02" :orbit-number 1 :pcs-time 333 :si-vis-utilization 3045 :al-overhead-at-end 0 :internal-dur-at-end 67 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3393 :pcs-gap 0 ) (Tic-Orbit :proposal-id 15066 :visit-id "02" :orbit-number 2 :pcs-time 222 :si-vis-utilization 3150 :al-overhead-at-end 0 :internal-dur-at-end 341 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3393 :pcs-gap 0 ) false 2 0 The scheduling data was generated by CASM 25.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 15066 :visit-id "03" :proposal-version -1 :trans-version "20170613" :date "20-Jul-2017 16:44:55.0" :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 296192 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 15066 :visit-id "03" :obset-id "03" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 15066 :visit-id "03" :orbit-number 1 :pcs-time 333 :si-vis-utilization 3045 :al-overhead-at-end 0 :internal-dur-at-end 67 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3393 :pcs-gap 0 ) (Tic-Orbit :proposal-id 15066 :visit-id "03" :orbit-number 2 :pcs-time 222 :si-vis-utilization 3150 :al-overhead-at-end 0 :internal-dur-at-end 341 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3393 :pcs-gap 0 ) false 2 0 The scheduling data was generated by CASM 25.2. CASM was run in Phase II mode. To be observed preferably once the transition to LP4 is done so that all 4 visits are accomplished with the same settings (Tic-Visit :proposal-id 15066 :visit-id "04" :proposal-version -1 :trans-version "20170613" :date "20-Jul-2017 16:45:00.0" :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 296192 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 15066 :visit-id "04" :obset-id "04" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 15066 :visit-id "04" :orbit-number 1 :pcs-time 333 :si-vis-utilization 3045 :al-overhead-at-end 0 :internal-dur-at-end 67 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3393 :pcs-gap 0 ) (Tic-Orbit :proposal-id 15066 :visit-id "04" :orbit-number 2 :pcs-time 222 :si-vis-utilization 3150 :al-overhead-at-end 0 :internal-dur-at-end 341 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3393 :pcs-gap 0 ) false 2 0