Fixed patterns ----- Attempting Submission 4 (Tue Jul 31 22:01:45 GMT 2012) ----- HST Phase II Proposal 12530 (stripped-sn-cycle19.apt) successfully submitted. ----- Attempting Submission 5 (Tue Jul 31 22:23:06 GMT 2012) ----- HST Phase II Proposal 12530 (stripped-sn-cycle19.apt) successfully submitted. ----- Attempting Submission 6 (Tue Jul 31 22:53:45 GMT 2012) ----- We propose to obtain 5 epochs of UV spectroscopy of a Target of Opportunity stripped-envelope core-collapse supernova during 2 weeks roughly centered on maximum brightness. The underlying nature of these objects, from the mechanism by which they lose their envelopes to the details of their explosions, remains mysterious. Their connection to gamma-ray bursts and X-ray flashes only increases the importance of understanding these mechanisms. In addition, many supernovae of all types will be found in future high-redshift transient surveys, but the ability to distinguish between Type Ia (thermonuclear) supernovae and stripped-envelope supernovae will require a more thorough knowledge of the latter, especially at UV wavelengths. The spectra we propose to obtain will lead to several new insights. By comparing the evolution of the spectra as the photosphere recedes to deeper layers of the ejecta to our time series of spectral models, we will gain a better understanding of the explosion and possibly the progenitor star. Specifically, we may be able to determine the metal content of the progenitor through comparisons with our spectral models, and we should be able to probe the degree of mixing during the explosion. With coordinated observations of the SN in the optical and near-IR using our ground-based programs, we will be able to accurately characterize the nature of the emission radiated by these supernovae. Obtain STIS UV spectra of one bright (Vmax < 15.5 mag), nearby, stripped-envelope SN as soon as possible after discovery (preferably at t < -6 d, relative to maximum brightness), with subsequent spectra taken at predetermined intervals as follows, for a total of 5 epochs (15 orbits): Epoch(days) -6 -2 2 6 V(mag) 15.56 15.23 15.12 15.16 Orbits 4 4 4 3 S/N(2376Ang) 9 9 8.5 5 S/N(4300Ang) 47 54 56 52 S/N(7751Ang) 50 62 68 69 The cadence of the spectral observations is determined from the timescale over which significant changes are observed in ground-based optical/near-UV spectra. This is a disruptive ToO observation of a single bright SN. However, it is not an ultra-rapid (< 2 day turnaround) ToO. We will work with STScI staff to expedite the observations, and we will try to choose an object that minimizes the time between ToO activation and observations. If our object is found 14 days before maximum brightness, and we have a turnaround time of 8 days (i.e., significantly longer than the 2­5 day minimum), the first observation will commence about 6 days before maximum light. Our observations use both the STIS CCD and MAMA detectors in order to provide full wavelength coverage. The CCD observations do not need an entire orbit, and can be done during the final MAMA orbit of each epoch. The requirement described in the STIS Instrument Handbook for Cycle 19 that such observations be split into separate visits presents a substantial problem for our program. The spectra of SNe change rapidly (on a time scale of 1­2 days) at these early phases; temporally separating pieces of the spectrum might seriously compromise our ability to model it. Our program would greatly benefit if the whole spectrum were obtained in a single visit. Therefore, we request an exception to the rule as outlined in Section 2.6 of the STIS Instrument Handbook. However, if this request cannot be accommodated, we request visits not more than 1 day from each other. Our SN, which is optically bright, will have ground-based astrometry with respect to HST guide stars accurate to better than 0.2''. Using the STIS Acquisition ETC we find acquisition times of less than 1 min for all epochs, for the 0.2'' slit. Previously, we have successfully acquired SNe with STIS in this manner. This is a ToO proposal. We will update our phase 2 with the supernova coordinates as they become available. HOT STARS 12 false 0.0 0.0 false false false false SUPPORTED STAR SUPERNOVA J2000 STIS/NUV-MAMA Spectroscopic No No G230L 2376 STIS/CCD Spectroscopic No No G430L 4300 STIS/CCD Spectroscopic No No G750L 7751 STIS/NUV-MAMA Spectroscopic No No G230L 2376 STIS/CCD Spectroscopic No No G430L 4300 STIS/CCD Spectroscopic No No G750L 7751 STIS/NUV-MAMA Spectroscopic No No G230L 2376 STIS/CCD Spectroscopic No No G430L 4300 STIS/CCD Spectroscopic No No G750L 7751 STIS/NUV-MAMA Spectroscopic No No G230L 2376 STIS/CCD Spectroscopic No No G430L 4300 STIS/CCD Spectroscopic No No G750L 7751 STIS/NUV-MAMA Spectroscopic No No G230L 2376 STIS/CCD Spectroscopic No No G430L 4300 STIS/CCD Spectroscopic No No G750L 7751 POS-TARG DITHER 1.1 LINE false false 10 90.0 STIS-ALONG-SLIT 1 false POS-TARG DITHER 1.14 LINE false false 7 90.0 STIS-ALONG-SLIT 3 false POS-TARG DITHER 0.5 LINE false true 10 90.0 STIS-ALONG-SLIT 4 false Timing link suitability includes constraints ([02 After 01 by 3.0 to 5.0 days]) The scheduling data was generated by CASM 20.2. CASM was run in Phase II mode. C:\Users\Physics-admin\Documents\OP-cache\stripped-sn-cycle19-v01.xml 1343772054031 50.9 (Tic-Visit :proposal-id 12530 :visit-id "01" :proposal-version -1 :trans-version "20120604" :date "01-Aug-2012 01:00:48.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 4 :saa-model "24" :si-bright-earth-limb-angle 20.0 :data-volume 913120 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 12530 :visit-id "01" :obset-id "01" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 12530 :visit-id "01" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2720 :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 3054.0 :pcs-gap 0 ) (Tic-Orbit :proposal-id 12530 :visit-id "01" :orbit-number 2 :pcs-time 222 :si-vis-utilization 2832 :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 3054.0 :pcs-gap 0 ) (Tic-Orbit :proposal-id 12530 :visit-id "01" :orbit-number 3 :pcs-time 222 :si-vis-utilization 2832 :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 3054.0 :pcs-gap 0 ) (Tic-Orbit :proposal-id 12530 :visit-id "01" :orbit-number 4 :pcs-time 222 :si-vis-utilization 2828 :al-overhead-at-end 0 :internal-dur-at-end 660 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3054.0 :pcs-gap 0 ) true 4 0 Target of Opportunity Timing link suitability includes constraints ([02 After 01 by 3.0 to 5.0 days] [03 After 02 by 3.0 to 5.0 days]) The scheduling data was generated by CASM 20.2. CASM was run in Phase II mode. C:\Users\Physics-admin\Documents\OP-cache\stripped-sn-cycle19-v02.xml 1343772057936 50.9 (Tic-Visit :proposal-id 12530 :visit-id "02" :proposal-version -1 :trans-version "20120604" :date "01-Aug-2012 01:00:56.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 4 :saa-model "24" :si-bright-earth-limb-angle 20.0 :data-volume 913120 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 12530 :visit-id "02" :obset-id "02" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 12530 :visit-id "02" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2720 :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 3054.0 :pcs-gap 0 ) (Tic-Orbit :proposal-id 12530 :visit-id "02" :orbit-number 2 :pcs-time 222 :si-vis-utilization 2832 :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 3054.0 :pcs-gap 0 ) (Tic-Orbit :proposal-id 12530 :visit-id "02" :orbit-number 3 :pcs-time 222 :si-vis-utilization 2832 :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 3054.0 :pcs-gap 0 ) (Tic-Orbit :proposal-id 12530 :visit-id "02" :orbit-number 4 :pcs-time 222 :si-vis-utilization 2828 :al-overhead-at-end 0 :internal-dur-at-end 660 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3054.0 :pcs-gap 0 ) true 4 0 Target of Opportunity Timing link suitability includes constraints ([03 After 02 by 3.0 to 5.0 days] [04 After 03 by 3.0 to 5.0 days]) The scheduling data was generated by CASM 20.2. CASM was run in Phase II mode. C:\Users\Physics-admin\Documents\OP-cache\stripped-sn-cycle19-v03.xml 1343772061527 50.9 (Tic-Visit :proposal-id 12530 :visit-id "03" :proposal-version -1 :trans-version "20120604" :date "01-Aug-2012 01:01:00.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 4 :saa-model "24" :si-bright-earth-limb-angle 20.0 :data-volume 913120 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 12530 :visit-id "03" :obset-id "03" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 12530 :visit-id "03" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2720 :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 3054.0 :pcs-gap 0 ) (Tic-Orbit :proposal-id 12530 :visit-id "03" :orbit-number 2 :pcs-time 222 :si-vis-utilization 2832 :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 3054.0 :pcs-gap 0 ) (Tic-Orbit :proposal-id 12530 :visit-id "03" :orbit-number 3 :pcs-time 222 :si-vis-utilization 2832 :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 3054.0 :pcs-gap 0 ) (Tic-Orbit :proposal-id 12530 :visit-id "03" :orbit-number 4 :pcs-time 222 :si-vis-utilization 2828 :al-overhead-at-end 0 :internal-dur-at-end 660 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3054.0 :pcs-gap 0 ) true 4 0 Target of Opportunity Timing link suitability includes constraints ([04 After 03 by 3.0 to 5.0 days]) The scheduling data was generated by CASM 20.2. CASM was run in Phase II mode. C:\Users\Physics-admin\Documents\OP-cache\stripped-sn-cycle19-v04.xml 1343772064513 50.9 (Tic-Visit :proposal-id 12530 :visit-id "04" :proposal-version -1 :trans-version "20120604" :date "01-Aug-2012 01:01:03.0" :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 686960 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 12530 :visit-id "04" :obset-id "04" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 12530 :visit-id "04" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2720 :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 3054.0 :pcs-gap 0 ) (Tic-Orbit :proposal-id 12530 :visit-id "04" :orbit-number 2 :pcs-time 222 :si-vis-utilization 2832 :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 3054.0 :pcs-gap 0 ) (Tic-Orbit :proposal-id 12530 :visit-id "04" :orbit-number 3 :pcs-time 222 :si-vis-utilization 2828 :al-overhead-at-end 0 :internal-dur-at-end 660 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3054.0 :pcs-gap 0 ) true 3 0 Target of Opportunity Timing link suitability includes constraints ([06 After 05 by 3.0 to 5.0 days]) The scheduling data was generated by CASM 20.2. CASM was run in Phase II mode. C:\Users\Physics-admin\Documents\OP-cache\stripped-sn-cycle19-v05.xml 1343771833560 50.9 (Tic-Visit :proposal-id 12530 :visit-id "05" :proposal-version -1 :trans-version "20120604" :date "01-Aug-2012 00:57:13.0" :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 930544 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 12530 :visit-id "05" :obset-id "05" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 12530 :visit-id "05" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2720 :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 3054.0 :pcs-gap 0 ) (Tic-Orbit :proposal-id 12530 :visit-id "05" :orbit-number 2 :pcs-time 222 :si-vis-utilization 2831 :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 3054.0 :pcs-gap 0 ) (Tic-Orbit :proposal-id 12530 :visit-id "05" :orbit-number 3 :pcs-time 222 :si-vis-utilization 2831 :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 3054.0 :pcs-gap 0 ) (Tic-Orbit :proposal-id 12530 :visit-id "05" :orbit-number 4 :pcs-time 222 :si-vis-utilization 2831 :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 3054.0 :pcs-gap 0 ) (Tic-Orbit :proposal-id 12530 :visit-id "05" :orbit-number 5 :pcs-time 222 :si-vis-utilization 2832 :al-overhead-at-end 0 :internal-dur-at-end 660 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3054.0 :pcs-gap 0 ) true 5 0 Target of Opportunity Timing link suitability includes constraints ([06 After 05 by 3.0 to 5.0 days] [07 After 06 by 3.0 to 5.0 days]) The scheduling data was generated by CASM 20.2. CASM was run in Phase II mode. C:\Users\Physics-admin\Documents\OP-cache\stripped-sn-cycle19-v06.xml 1343771569965 50.9 (Tic-Visit :proposal-id 12530 :visit-id "06" :proposal-version -1 :trans-version "20120604" :date "01-Aug-2012 00:52:49.0" :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 930544 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 12530 :visit-id "06" :obset-id "06" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 12530 :visit-id "06" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2720 :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 3054.0 :pcs-gap 0 ) (Tic-Orbit :proposal-id 12530 :visit-id "06" :orbit-number 2 :pcs-time 222 :si-vis-utilization 2831 :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 3054.0 :pcs-gap 0 ) (Tic-Orbit :proposal-id 12530 :visit-id "06" :orbit-number 3 :pcs-time 222 :si-vis-utilization 2831 :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 3054.0 :pcs-gap 0 ) (Tic-Orbit :proposal-id 12530 :visit-id "06" :orbit-number 4 :pcs-time 222 :si-vis-utilization 2831 :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 3054.0 :pcs-gap 0 ) (Tic-Orbit :proposal-id 12530 :visit-id "06" :orbit-number 5 :pcs-time 222 :si-vis-utilization 2832 :al-overhead-at-end 0 :internal-dur-at-end 660 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3054.0 :pcs-gap 0 ) true 5 0 Target of Opportunity Timing link suitability includes constraints ([07 After 06 by 3.0 to 5.0 days]) The scheduling data was generated by CASM 20.2. CASM was run in Phase II mode. C:\Users\Physics-admin\Documents\OP-cache\stripped-sn-cycle19-v07.xml 1343771635384 50.9 (Tic-Visit :proposal-id 12530 :visit-id "07" :proposal-version -1 :trans-version "20120604" :date "01-Aug-2012 00:53:55.0" :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 930544 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 12530 :visit-id "07" :obset-id "07" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 12530 :visit-id "07" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2720 :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 3054.0 :pcs-gap 0 ) (Tic-Orbit :proposal-id 12530 :visit-id "07" :orbit-number 2 :pcs-time 222 :si-vis-utilization 2831 :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 3054.0 :pcs-gap 0 ) (Tic-Orbit :proposal-id 12530 :visit-id "07" :orbit-number 3 :pcs-time 222 :si-vis-utilization 2831 :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 3054.0 :pcs-gap 0 ) (Tic-Orbit :proposal-id 12530 :visit-id "07" :orbit-number 4 :pcs-time 222 :si-vis-utilization 2831 :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 3054.0 :pcs-gap 0 ) (Tic-Orbit :proposal-id 12530 :visit-id "07" :orbit-number 5 :pcs-time 222 :si-vis-utilization 2832 :al-overhead-at-end 0 :internal-dur-at-end 660 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3054.0 :pcs-gap 0 ) true 5 0 Target of Opportunity