Wide band spectra of nova-like variables: A confrontation of observations with theory

0 Assigned ID: 54 ----- Attempting Submission 1 (Fri Apr 01 18:03:21 GMT 2016) ----- HST Phase I Proposal 54 (cv.apt) successfully submitted. Receipt: # 54-1 ----- Attempting Submission 2 (Mon Apr 04 20:20:52 GMT 2016) ----- Updated phase 0 of RW Tri and UX UMa to be closer to the actual observations. Phase zero is now close to the New Year 2017 1419990797 ----- Attempting Submission 1 (Sat Jul 16 20:27:51 GMT 2016) ----- ----- Attempting Submission 2 (Sun Aug 14 18:26:41 GMT 2016) ----- ----- Attempting Submission 3 (Thu Dec 29 22:02:31 GMT 2016) ----- Wide band spectra of nova-like variables: A confrontation of observations with theory Nova-like variables are the best and nearest examples of steady-state disk accretion onto a compact object. Emission in these system arises from a large number of components, including the WD and secondary star, the accretion disk through which mass is accreted, and a wind through which mass is lost. However, the only wide band ``spectra'' of these variable objects have been constructed by stitching together spectra obtained at different times, and as a result it is difficult to conclude exactly what is causing the departures from the predictions of steady-state accretion disk models that are observed, or to establish the geometry of the wind in these systems. This is a project to use HST/STIS to obtain single-epoch, FUV-near IR spectra of five bright nova-like variables, with varying inclinations, to remedy this problem. We will compare this benchmark set of spectra to new models of the disks and winds for this group of cataclysmic variables in order to measure the temperature profiles of the disks, to determine mass loss rates, collimation, and other physical characteristics of the winds, and to assess the overall effect of the dense regions of the wind on the spectral energy distribution. This is a project to observe 5 nova like variables. These are CVs that are (nearly always) in the high state. Two of the objects (UX UMa and RW Tri) are eclipsing. Our goal is to obtain a very broad band spectrum of the unocculted light of each of the systems and so the observations for these two objects are time-constrained. We want to carry out model fits to the entire spectrum so (relative) photometric accuracy is important. Each target is to be observed for one orbit with STIS. Each is observed with 4 grating setups, a MAMA/FUV grating, the CCD/230LB grating, the CCD/G430L grating and the CCD/G750L grating (in that order). For fainter sources (UX UMa and RW Tri), the G140L grating will be used for the FUV grating; for brighter sources the E140M grating will be used for the FUV. Each observation will conclude with a fringe flat for the G750L grating. As the exposures are short, subarrays have been used for the CCD observations, 128 for the 230LB and 430 L gratings, and 256 for the G750L grating. Stellar Physics 6 false true false false false false AVAILABLE EXT-STAR DISK DWARF NOVA This object was generated by the targetselector and retrieved from the SIMBAD database. It is the Hipparcos postions J2000 J2000 EXT-STAR DISK DWARF NOVA This object was generated by the targetselector and retrieved from the SIMBAD database. The values are Hipparcos positions J2000 J2000 EXT-STAR DISK DWARF NOVA This object was generated by the targetselector and retrieved from the SIMBAD database. J2000 J2000 EXT-STAR DISK DWARF NOVA This object was generated by the targetselector and retrieved from the SIMBAD database. J2000 J2000 EXT-STAR DISK DWARF NOVA This object was generated by the targetselector and retrieved from the SIMBAD database. J2000 J2000 STIS/FUV-MAMA Spectroscopic No No E140M 1425 STIS/CCD Spectroscopic No No G230LB 2375 STIS/CCD Spectroscopic No No G430L 4300 STIS/CCD Spectroscopic No No G750L 7751 STIS/FUV-MAMA Spectroscopic No No E140M 1425 STIS/CCD Spectroscopic No No G230LB 2375 STIS/CCD Spectroscopic No No G430L 4300 STIS/CCD Spectroscopic No No G750L 7751 STIS/FUV-MAMA Spectroscopic No No E140M 1425 STIS/CCD Spectroscopic No No G230LB 2375 STIS/CCD Spectroscopic No No G430L 4300 STIS/CCD Spectroscopic No No G750L 7751 STIS/FUV-MAMA Spectroscopic No No G140L 1425 STIS/CCD Spectroscopic No No G230LB 2375 STIS/CCD Spectroscopic No No G430L 4300 STIS/CCD Spectroscopic No No G750L 7751 STIS/FUV-MAMA Spectroscopic No No G140L 1425 STIS/CCD Spectroscopic No No G230LB 2375 STIS/CCD Spectroscopic No No G430L 4300 STIS/CCD Spectroscopic No No G750L 7751 POS-TARG DITHER 0.4064 LINE false false 3 90.0 STIS-ALONG-SLIT 1

false

1483048590292 The scheduling data was generated by CASM 24.2. CASM was run in Phase II mode. 1486779237000 22.2287784566374 (Tic-Visit :proposal-id 14637 :visit-id "01" :proposal-version -1 :trans-version "20160601" :date "29-Dec-2016 15:56:29.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "24" :si-bright-earth-limb-angle 20.0 :data-volume 247520 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 14637 :visit-id "01" :obset-id "01" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 14637 :visit-id "01" :orbit-number 1 :pcs-time 333 :si-vis-utilization 3003 :al-overhead-at-end 118 :internal-dur-at-end 588 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3352 :pcs-gap 0 ) true 1 0 The estimated count rate is 51,000 counts/s thourgh this aperture for the entire array, which is significantly less than the maximum of 80,000 for an irregularly variable object. The object is well studied in the UV with both IUE and HUT, so this estimate should be robust. 1486665574142 /private/var/folders/zc/ljhf1lgn10b1yd9ytmwlp4jr00070l/T/OPVisit6043905166674438092.xml The scheduling data was generated by CASM 24.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 14637 :visit-id "02" :proposal-version -1 :trans-version "20170109" :date "09-Feb-2017 13:39:33.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "24" :si-bright-earth-limb-angle 20.0 :data-volume 247520 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 14637 :visit-id "02" :obset-id "02" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 14637 :visit-id "02" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2935 :al-overhead-at-end 118 :internal-dur-at-end 588 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3307 :pcs-gap 0 ) true 1 0 V3885 Sgr has been observed previously in this mode with this 0.2 x 0.2 apeture. 1486665646838 /private/var/folders/zc/ljhf1lgn10b1yd9ytmwlp4jr00070l/T/OPVisit8315562629815022252.xml The scheduling data was generated by CASM 24.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 14637 :visit-id "03" :proposal-version -1 :trans-version "20170109" :date "09-Feb-2017 13:40:46.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "24" :si-bright-earth-limb-angle 20.0 :data-volume 247520 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 14637 :visit-id "03" :obset-id "03" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 14637 :visit-id "03" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2861 :al-overhead-at-end 118 :internal-dur-at-end 588 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3213 :pcs-gap 0 ) true 1 0 RW Sex, which is not expected to vary much, has been observed previously in this range with the GHRS. 1486665702198 /private/var/folders/zc/ljhf1lgn10b1yd9ytmwlp4jr00070l/T/OPVisit3693100613779877903.xml Phase windows are not calculated when the gap between schedulable intervals is less than 1 days, assuming no scheduling restrictions for constraint Phase 0.300/0.600. The scheduling data was generated by CASM 24.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 14637 :visit-id "04" :proposal-version -1 :trans-version "20170109" :date "09-Feb-2017 13:41:41.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "24" :si-bright-earth-limb-angle 20.0 :data-volume 224768 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 14637 :visit-id "04" :obset-id "04" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 14637 :visit-id "04" :orbit-number 1 :pcs-time 333 :si-vis-utilization 3054 :al-overhead-at-end 118 :internal-dur-at-end 634 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3403 :pcs-gap 0 ) true 1 0 1486665759152 /private/var/folders/zc/ljhf1lgn10b1yd9ytmwlp4jr00070l/T/OPVisit1491783545997727438.xml Phase windows are not calculated when the gap between schedulable intervals is less than 1 days, assuming no scheduling restrictions for constraint Phase 0.300/0.600. The scheduling data was generated by CASM 24.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 14637 :visit-id "05" :proposal-version -1 :trans-version "20170109" :date "09-Feb-2017 13:42:38.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "24" :si-bright-earth-limb-angle 20.0 :data-volume 215776 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 14637 :visit-id "05" :obset-id "05" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 14637 :visit-id "05" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2888 :al-overhead-at-end 118 :internal-dur-at-end 625 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3229 :pcs-gap 0 ) true 1 0