The Incredibly Long-Lived SN 2005ip

0 Assigned ID: 304 ----- Attempting Submission 1 (Thu Apr 07 22:30:18 GMT 2016) ----- HST Phase I Proposal 304 (fox_hst24_interaction_v2_submit.apt) successfully submitted. Receipt: # 304-1 ----- Attempting Submission 2 (Fri Apr 08 21:55:26 GMT 2016) ----- HST Phase I Proposal 304 (fox_hst24_interaction_v2_submit.apt) successfully submitted. Receipt: # 304-2 ----- Attempting Submission 3 (Fri Apr 08 22:01:17 GMT 2016) ----- HST Phase I Proposal 304 (fox_hst24_interaction_v2_submit.apt) successfully submitted. Receipt: # 304-3 ----- Attempting Submission 4 (Fri Apr 08 23:00:21 GMT 2016) ----- Updated to account for a dimmer SN at V~21. -2048398150 ----- Attempting Submission 1 (Tue Jul 19 17:54:46 GMT 2016) ----- HST Phase II Proposal 14598 (fox_hst24_05ip_phase2.apt) successfully submitted. Receipt: # 14598-1 ----- Attempting Submission 2 (Wed Jul 20 23:42:54 GMT 2016) ----- The Incredibly Long-Lived SN 2005ip Type IIn supernovae (SNe IIn) are defined by their relatively narrow spectral line features associated with a dense circumstellar medium (CSM) formed by the progenitor star. The nature of the progenitor and mass loss remains relatively unknown. Shock interaction with the dense CSM can often result in significant UV emission for several years post-explosion, thereby probing the CSM characteristics, progenitor mass loss history and, ultimately, the progenitor itself. The Type IIn SN 2005ip proves to be one of the most interesting and well-studied targets within this subclass. Compared to all other supernovae, SN 2005ip is the most luminous for its age. Now more than 11 years post-explosion, the SN has released >10^51 erg throughout its lifetime as the forward shock continues to collide with a dense CSM. Here we propose HST/STIS-MAMA UV observations of SN 2005ip to investigate the massive CSM. When accounting for the shock travel time, these observations will probe material lost from the progenitor more than 1000 years prior to the explosion. We already have a single HST/STIS spectrum of SN 2005ip from 2014, which was obtained while the shock was still within a higher mass regime. With just 5 orbits, a second spectrum will allow us to directly trace the evolution of the CSM and produce new constraints on the pre-SN mass-loss history. Coinciding with Cycle 24's UV Initiative, this program offers new insight regarding both the progenitor and explosion characteristics of the SN IIn subclass. We propose to obtain a single STIS-MAMA spectrum of SN 2005ip in both the G140 and G230L bandpasses. The goal is to detect UV signatures of CSM interaction to (1) constrain the CSM characteristics, including the geometry and composition, and (2) confirm emission from CSM interaction as the heating source in the warm-dust model presented by Fox et al. (2011). We choose STIS over COS because, while COS is optimized for isolated faint point-sources, STIS offers spatially resolved spectra that exploit the intrinsically high resolution of HST over a large spectral range (accommodating both the C III] 1909 and Mg II 2800 lines). The long slit length will allow us to subtract contamination from zodiacal light, earthshine, the host galaxy, and H II regions. Stellar Physics 12 false true false false false 0 0 0 0 0 false SUPPORTED EXT-STAR SUPERNOVA SUPERNOVA TYPE II This object was generated by the targetselector and retrieved from the SIMBAD database. J2000 J2000 STIS/NUV-MAMA Spectroscopic No No G230L 2376 STIS/FUV-MAMA Spectroscopic No No G140L 1425 POS-TARG DITHER 1 LINE false true 4 90.0 STIS-ALONG-SLIT 1

false

1469058143872 /private/var/folders/yh/kl4y3s1x3_j3ywy3qq67g3vc0001kc/T/OPVisit3308198971230085825.xml The scheduling data was generated by CASM 24.2. CASM was run in Phase II mode. Normal ACQ. (Tic-Visit :proposal-id 14598 :visit-id "01" :proposal-version -1 :trans-version "20160601" :date "20-Jul-2016 19:42:23.0" :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 1496576 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 14598 :visit-id "01" :obset-id "01" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 14598 :visit-id "01" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2878 :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 3213 :pcs-gap 0 ) (Tic-Orbit :proposal-id 14598 :visit-id "01" :orbit-number 2 :pcs-time 222 :si-vis-utilization 2990 :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 3213 :pcs-gap 0 ) (Tic-Orbit :proposal-id 14598 :visit-id "01" :orbit-number 3 :pcs-time 222 :si-vis-utilization 2990 :al-overhead-at-end 0 :internal-dur-at-end 113 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3213 :pcs-gap 0 ) (Tic-Orbit :proposal-id 14598 :visit-id "01" :orbit-number 4 :pcs-time 222 :si-vis-utilization 2988 :al-overhead-at-end 104 :internal-dur-at-end 132 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3213 :pcs-gap 0 ) (Tic-Orbit :proposal-id 14598 :visit-id "01" :orbit-number 5 :pcs-time 222 :si-vis-utilization 2991 :al-overhead-at-end 104 :internal-dur-at-end 394 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3213 :pcs-gap 0 ) true 5 0 Exposure time set for 20121115 spectrum of 05ip scaled to V mag = 20.5. Plus an extra 20 seconds to account for potential fading.