0 Assigned ID: 1182 ----- Attempting Submission 1 (Thu Feb 28 01:29:07 GMT 2013) ----- Target updated: new target 3: old: RA=12H33M12.9800S DEC=-27D48'53.40" new: " " 12.9769S " " 53.141" Visit 3 off hold, no orient needed use new target in visit 3 removed on hold and after by link 6423423 ----- Attempting Submission 1 (Mon Jun 24 18:59:42 GMT 2013) ----- ----- Attempting Submission 2 (Tue Sep 17 21:30:47 GMT 2013) ----- HST Phase II Proposal 13469 (13469.apt) successfully submitted. ----- Attempting Submission 3 (Tue Sep 17 23:47:06 GMT 2013) ----- ----- Attempting Submission 4 (Wed Feb 19 13:35:04 GMT 2014) ----- HST Phase II Proposal 13469 (13469.apt) successfully submitted. ----- Attempting Submission 5 (Wed Feb 19 13:49:02 GMT 2014) ----- HST Phase II Proposal 13469 (13469.apt) successfully submitted. ----- Attempting Submission 6 (Wed Feb 19 19:24:29 GMT 2014) ----- HST Phase II Proposal 13469 (13469.apt) successfully submitted. ----- Attempting Submission 7 (Wed Feb 19 19:31:34 GMT 2014) ----- Tol 26 and the EGB 6 Class of Planetary-Nebula Nuclei: What Happens to a Companion Star when a PN is Ejected? Tol 26 is a faint, compact, high-latitude planetary nebula (PN), little studied since its discovery in the 70's. Its nebular spectrum is unusual in having no [O II] or [N II], and strong [O III] 4363, indicating very high electron density. Tol 26 is unresolved from the ground. GALEX, BVRI, 2MASS, and WISE data reveal: a bright UV source, which we identify as the central star; optical flux consistent with a dK companion, and NIR and MIR excesses indicating the presence of warm dust with two distinct temperatures. Tol 26 resembles the formerly unique EGB 6, a faint PN with a compact nucleus, also containing a hot white dwarf (WD) and dual-temperature dust. EGB 6 has a close dM companion; HST imaging shows that the compact nebula coincides with the dM star, not the WD. We speculate that a portion of the outflow during PN ejection created an accretion disk around the dM star, which has survived to the present time, and is ionized by the WD's UV flux. We propose WFC3 imaging of Tol 26, using filters that will separately isolate the hot central star, nebular emission, and the optical and NIR fluxes. We will determine whether there is likewise a resolved companion star in this system, and if so whether the nebular emission comes from an accreted disk around the companion, as in EGB 6. We will also obtain a FUV spectrum of Tol 26, to determine the Teff/log g of the central star and search for accreted metals. Our study will have wider implications for the spin-up of companion stars of PN nuclei, formation of barium stars, and the nature of 24-micron excesses discovered in several hot WDs and PN central stars. We will also obtain new images of EGB 6, last imaged by HST in 1995. We will obtain WFC3 images of two central stars of planetary nebulae, Tol 26 and EGB 6, with the main aim of determining the spatial locations of (a) the hot central star, (b) a cool companion star that is resolved from the hot star in EGB 6 and possibly in Tol 26, (c) compact ionized nebulae, possibly associated with the cool companions, and (d) warm dust. A range of WFC3 filters from the NUV, to the optical (including narrow-band filters), and the NIR will be used to sort out these components. We will also obtain a COS FUV spectrum of Tol 26, for the purpose of determining atmospheric parameters of the hot stellar component. HOT STARS 12 false true 0.0 0.0 false false false AVAILABLE STAR PLANETARY NEBULA CENTRAL STAR This object was generated by the targetselector and retrieved from the SIMBAD database. TOL1230-275 PNG298.0+34.8 J2000 J2000 STAR PLANETARY NEBULA CENTRAL STAR J2000 J2000 STAR PLANETARY NEBULA CENTRAL STAR This object was generated by the targetselector and retrieved from the SIMBAD database. TOL1230-275 PNG298.0+34.8 J2000 J2000 WFC3/UVIS Imaging No No F336W WFC3/UVIS Imaging No No F555W WFC3/UVIS Imaging No No F814W WFC3/UVIS Imaging No No F502N WFC3/UVIS Imaging No No F225W WFC3/UVIS Imaging No No F656N WFC3/IR Imaging No No F160W WFC3/UVIS Imaging No No F275W COS/FUV Spectroscopic No No G140L 1105 WFC3/UVIS Imaging No No F336W WFC3/UVIS Imaging No No F555W WFC3/UVIS Imaging No No F814W WFC3/UVIS Imaging No No F502N WFC3/UVIS Imaging No No F225W WFC3/UVIS Imaging No No F656N WFC3/IR Imaging No No F160W WFC3/UVIS Imaging No No F275W POS-TARG DITHER 0.173 LINE 0.112 false true 81.785 4 23.884 WFC3-UVIS-DITHER-BOX 1 false POS-TARG DITHER 0.572 LINE 0.365 false true 74.653 4 18.528 WFC3-IR-DITHER-BOX-MIN 2 false POS-TARG DITHER 0.135 LINE false true 3 46.84 WFC3-UVIS-DITHER-LINE-3PT 3 false Timing link suitability includes constraints ([03 After 01 by 60.0 to 365.0 days]) The scheduling data was generated by CASM 21.2. CASM was run in Phase II mode. ORIENT requirements are included because there is a bright star 25" away from the target. These requirements avoid either the charge bleeding columns or the diffraction spikes from the bright star interfering with the target. 1392597142000 312.12713915261736 (Tic-Visit :proposal-id 13469 :visit-id "01" :proposal-version -1 :trans-version "20130722" :date "17-Sep-2013 19:43:44.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "29" :si-bright-earth-limb-angle 20.0 :data-volume 141584 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 13469 :visit-id "01" :obset-id "01" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 13469 :visit-id "01" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2538 :al-overhead-at-end 0 :internal-dur-at-end 236 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3253 :pcs-gap 0 ) false 1 0 The scheduling data was generated by CASM 21.2. CASM was run in Phase II mode. 1386309156000 289.4915173392781 (Tic-Visit :proposal-id 13469 :visit-id "02" :proposal-version -1 :trans-version "20130722" :date "17-Sep-2013 17:23:54.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "29" :si-bright-earth-limb-angle 20.0 :data-volume 223344 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 13469 :visit-id "02" :obset-id "02" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 13469 :visit-id "02" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2867 :al-overhead-at-end 0 :internal-dur-at-end 326 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3239 :pcs-gap 0 ) false 1 0 Timing link suitability includes constraints ([03 After 01 by 60.0 to 365.0 days]) The scheduling data was generated by CASM 21.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 13469 :visit-id "03" :proposal-version -1 :trans-version "20130722" :date "17-Sep-2013 17:06:01.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "31" :si-bright-earth-limb-angle 20.0 :data-volume 174080 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 13469 :visit-id "03" :obset-id "03" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 13469 :visit-id "03" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2917 :al-overhead-at-end 0 :internal-dur-at-end 404 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3253 :pcs-gap 0 ) false 1 0