For the majority of red giant stars the basic mass-loss processes at work are unknown. Indeed, for stars of spectral types between K0 III and M5-M6 III, much remains unknown about the regions above the visible photosphere and the transportation of the processed material outwards to the ISM. Eclipsing symbiotic binary systems, consisting of an evolved giant in orbit with a white dwarf, provide an opportunity to take advantage of the finite size of the hot component to probe different levels of the chromosphere and wind acceleration region in absorption. This provides spatially resolved thermal, ionisation and dynamic information on the wind which can then be compared against predictions of hydrodynamical stellar atmosphere codes. The symbiotic binary EG And can be considered as a rosetta stone for understanding the winds of these objects. The system is ideal on a number of counts for utilising the ultraviolet eclipse of the white dwarf (WD) component to probe, layer-by-layer, the thermal and dynamic conditions at the very base of the wind and chromosphere of the RG. This information is vital for constraining, testing and calibrating the new generation of cool giant wind+chromosphere models and is not possible to obtain for isolated RGs. This team has studied the UV eclipses of this system in depth and detail, however in order to definitively constrain the wind acceleration profile and identify the location of the temperature rise just above the photosphere we require 4 STIS E140M observations of EG And at specific orbital phases. We are also requesting a E230M observation of an isolated spectral standard, corresponding to the RG in the binary, which will help place the EG And results into the context of the general RG population from analysis of the MgII wind diagnostic lines.

Observations are for 3 targets: 2 stars (HD1013 and HD148349) are spectral analogues for the red giant under study in the symbiotic binary HD4174 (EG And). HD148349 was in the original proposal, but the radial velocity of this star may preclude observation of the wind structure in MgII, so HD1013 has been added as a backup. MgII details are the main requirement, but the addition of the G140L observations will permit detection or the setting of upper limits on additional chromospheric features. In addition, a G430L observation has been inserted so that a calibration of the G430L data taken for all ACQ/PEAK observations of EG And (including historical data in the archive) through the 0.2x0.06 aperture can be obtained. EG And will be observed at a number of phases to record the absorptipon features as the impact parameter of our sightline to the white dwarf secondary changes as it orbits the red giant primary. ISM AND CIRCUMSTELLAR MATTER 12 false 0.0 0.0 false false false false false false SUPPORTED STAR COMPOSITE SPECTRAL TYPE INTERACTING BINARY M III-I SYMBIOTIC STAR This object was generated by the targetselector and retrieved from the SIMBAD database. f(3200)=7.0e-14;f(1380 Ang) ~ 3e-13 outside eclipse EG-AND GSC02801-01704 J2000 00 44 37.1869 +40 40 45.71 J2000 STAR M III-I This object was generated by the targetselector and retrieved from the SIMBAD database. f(3200)=1.5e-13;f(1450)=7.5e-16(est) V2106-OPH GSC05626-00124 J2000 16 27 43.4564 -07 35 52.55 J2000 STAR M III-I This object was generated by the targetselector and retrieved from the SIMBAD database. f(3200)=3.5e-13;f(1450)=.7e-15(est) CHI-PEG GSC01185-02319 J2000 00 00 0.0000 +00 00 0.00 J2000 STIS/FUV-MAMA Spectroscopic No No E140M 1425 STIS/FUV-MAMA Spectroscopic No No E140M 1425 STIS/FUV-MAMA Spectroscopic No No E140M 1425 STIS/FUV-MAMA Spectroscopic No No E140M 1425 STIS/NUV-MAMA Spectroscopic No No E230M 2707 The scheduling data was generated by CASM 17.2. CASM was run in Phase II mode. 1251862808000 97.48023340282288 (Tic-Visit :proposal-id 11690 :visit-id "01" :proposal-version -1 :trans-version "20080624" :date "24-Jul-2008 16:29:56.0" :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 175536 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 11690 :visit-id "01" :obset-id "01" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 11690 :visit-id "01" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2909 :al-overhead-at-end 0 :internal-dur-at-end 396 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3242 :pcs-gap 0 ) true 1 0 STIS80038 Bruzual M3III model with E(B-V)=0.05 and V=5.3 has S/N=341.19 (time to saturation 0.76s) ETC STIS79982 S/N=110 at 4451A brightest pixel 7,200 CCDGAIN=4, CR-SPLIT=1, 52x0.05 Bruzual M3III E(B-V)=0.05 for V=5.3 ETC run STIS79975 with M3 III Bruzual model normalized to 1.5e-13 at 3200A after E(B-V)=0.05 gives S/N=16 at 2790A ETC run STIS79976 S/N=6 in 150s at 1450A for 7.5e-16 flat continuum The scheduling data was generated by CASM 17.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 11690 :visit-id "02" :proposal-version -1 :trans-version "20090702" :date "22-Sep-2009 10:10:12.0" :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 212336 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 11690 :visit-id "02" :obset-id "02" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 11690 :visit-id "02" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2925 :al-overhead-at-end 0 :internal-dur-at-end 396 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3258 :pcs-gap 0 ) true 1 0 ETC STIS79978 S/N=305 at 4300A with E(B-V)=0.05 and V=4.8 ETCID 79716 / ETC STIS79981 S/N=140/resn element at 4451A brightest pixel 11,000 E(B-V)=0.05 Bruzual M3III V=4.8 52x0.05 aperture, CCDGAIN=4, CR-SPLIT=1 texp=0.5 ETC STIS79985 S/N=46.7 in 0.1s Bruzual M3III V=4.8, E(B-V)=0.05; CCDGAIN=1, CR-SPLIT=NO ETC run with M3 III Bruzual model normalized to 3e-14 at 3200A gives S/N=10 @ 2810A STISID80097 S/N=4 per resolution element for 250s with flat continuum of 1.7e-15 Timing link suitability includes constraints ([04 After 03 by 3.5 to 7.0 days]) The scheduling data was generated by CASM 17.2. CASM was run in Phase II mode. 1250352061000 228.3269007407186 (Tic-Visit :proposal-id 11690 :visit-id "03" :proposal-version -1 :trans-version "20080624" :date "24-Jul-2008 16:30:00.0" :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 279984 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 11690 :visit-id "03" :obset-id "03" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 11690 :visit-id "03" :orbit-number 1 :pcs-time 333 :si-vis-utilization 3018 :al-overhead-at-end 0 :internal-dur-at-end 115 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3351 :pcs-gap 0 ) (Tic-Orbit :proposal-id 11690 :visit-id "03" :orbit-number 2 :pcs-time 195 :si-vis-utilization 3129 :al-overhead-at-end 196 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3351 :pcs-gap 0 ) (Tic-Orbit :proposal-id 11690 :visit-id "03" :orbit-number 3 :pcs-time 195 :si-vis-utilization 3156 :al-overhead-at-end 196 :internal-dur-at-end 321 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3351 :pcs-gap 0 ) true 3 0 STIS80038 Bruzual M3III model with E(B-V)=0.05 and V=7.3 has S/N=94.05 (time to saturation 4.8s) STIS80099 S/N=125 per resolution element in 4s for Bruzual M3III model, E(B-V)=0.05 and V=7.3 Exposure based on previous Cycle 11 data Exposure based on previous Cycle 11 data ETC STIS79986 S/N=1.6/resn element at 1425A E140M 0.2x0.06 Texp=3100s Timing link suitability includes constraints ([04 After 03 by 3.5 to 7.0 days]) The scheduling data was generated by CASM 17.2. CASM was run in Phase II mode. 1250703000000 225.86401294907353 (Tic-Visit :proposal-id 11690 :visit-id "04" :proposal-version -1 :trans-version "20080624" :date "25-Jul-2008 09:08:05.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 2 :saa-model "24" :si-bright-earth-limb-angle 20.0 :data-volume 192976 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 11690 :visit-id "04" :obset-id "04" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 11690 :visit-id "04" :orbit-number 1 :pcs-time 333 :si-vis-utilization 3018 :al-overhead-at-end 0 :internal-dur-at-end 115 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3351 :pcs-gap 0 ) (Tic-Orbit :proposal-id 11690 :visit-id "04" :orbit-number 2 :pcs-time 195 :si-vis-utilization 3156 :al-overhead-at-end 196 :internal-dur-at-end 321 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3351 :pcs-gap 0 ) true 2 0 STIS80038 Bruzual M3III model with E(B-V)=0.05 and V=7.3 has S/N=94.05 (time to saturation 4.8s) STIS80099 S/N=125 per resolution element in 4s for Bruzual M3III model, E(B-V)=0.05 and V=7.3 Exposure based on previous Cycle 11 data Exposure based on previous Cycle 11 data Timing link suitability includes constraints ([06 After 05 by 2.0 to 6.0 days]) The scheduling data was generated by CASM 17.2. CASM was run in Phase II mode. 1254475846000 184.5616407691909 (Tic-Visit :proposal-id 11690 :visit-id "05" :proposal-version -1 :trans-version "20080624" :date "24-Jul-2008 16:30:08.0" :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 88528 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 11690 :visit-id "05" :obset-id "05" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 11690 :visit-id "05" :orbit-number 1 :pcs-time 333 :si-vis-utilization 3018 :al-overhead-at-end 0 :internal-dur-at-end 397 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3351 :pcs-gap 0 ) true 1 0 STIS80038 Bruzual M3III model has S/N=94.05 (time to saturation 4.8s) STIS80099 S/N=125 per resolution element in 4s for Bruzual M3III model, E(B-V)=0.05 and V=7.3 STIS ETC79989 S/N=8 at 1425 flat spectrum f_lambda = 2e-13 Timing link suitability includes constraints ([06 After 05 by 2.0 to 6.0 days]) The scheduling data was generated by CASM 17.2. CASM was run in Phase II mode. 1254648646000 181.5882370791087 (Tic-Visit :proposal-id 11690 :visit-id "06" :proposal-version -1 :trans-version "20080624" :date "24-Jul-2008 16:30:09.0" :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 175536 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 11690 :visit-id "06" :obset-id "06" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 11690 :visit-id "06" :orbit-number 1 :pcs-time 333 :si-vis-utilization 3018 :al-overhead-at-end 0 :internal-dur-at-end 396 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3351 :pcs-gap 0 ) true 1 0 STIS80038 Bruzual M3III model with E(B-V)=0.05 and V=7.3 has S/N=94.05 (time to saturation 4.8s) STIS80099 S/N=125 per resolution element in 4s for Bruzual M3III model, E(B-V)=0.05 and V=7.3 Exposure based on previous Cycle 11 data Exposure based on previous Cycle 11 data