0 ----- Attempting Submission 1 (Fri Jul 10 13:59:47 GMT 2015) ----- Accurate masses and distances of the binary Cepheids S Mus and SU Cyg We propose to study the main-sequence companion of the classical Cepheids S Mus and SU Cyg. Binary Cepheids lead to a better understanding of their age and evolution. Our primary goal with this proposal is to measure the radial velocity (RV) of the blue companions at several orbital epochs during two years. Most of the companions are B main-sequence stars, hidden by the brightness of the Cepheids for wavelengths longer than 0.5 microns. That is why all Galactic binary Cepheids are single-line spectroscopic binaries, so far. In UV, the spectrum of the companions dominate over the Cepheids, making UV spectroscopy clearly the best way to obtain the RV of the companions. We will then combine the RVs of both components with our accurate astrometric measurements obtained from our complementary interferometric program on binary Cepheids. The unique combination of interferometry and spectroscopy for this kind of stars will provide a independent estimate of the mass and the distance of these standard candles. This is particularly important to constrain Cepheid models and make progress on the Cepheid mass-discrepancy problem. Independent distance measurements are also necessary to the calibration of fundamental Cepheid relations (period-luminosity, period-mass, ...), and check the future GAIA parallax estimates. Each of the requested STIS visits will consist of an imaging target acquisition exposure with the F25ND3 and a dispersed light peakup with the G230LB into the 0.2x0.09 aperture followed by wavelength calibration and science exposures using the STIS E140H setting. An extra wavelength calibration exposure will be taken at the end of the orbit in the occultation to give the best possible wavelength zero point. HOT STARS 12 false true false false AVAILABLE STAR B3-B5 V-IV CEPHEID COMPOSITE SPECTRAL TYPE F3-F9 This object was generated by the targetselector and retrieved from the SIMBAD database. J2000 J2000 B3.5V companion STAR B6-B9.5 V-IV CEPHEID COMPOSITE SPECTRAL TYPE F0-F2 This object was generated by the targetselector and retrieved from the SIMBAD database. J2000 J2000 B8V companion STIS/FUV-MAMA Spectroscopic No No E140H 1234 STIS/FUV-MAMA Spectroscopic No No E140H 1234 Timing link suitability includes constraints ([12 After 11 by 90.0 to 120.0 days]) The scheduling data was generated by CASM 23.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 14340 :visit-id "11" :proposal-version -1 :trans-version "20150609" :date "26-Jun-2015 02:10:31.0" :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 940928 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 14340 :visit-id "11" :obset-id "11" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 14340 :visit-id "11" :orbit-number 1 :pcs-time 333 :si-vis-utilization 3263 :al-overhead-at-end 0 :internal-dur-at-end 808 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3596 :pcs-gap 0 ) true 1 0 expect 952,000 e- from source in 5 sec exposure Predicted global count rate of 8411 c/s requires buffer time < 2e6/8400 = 237 c/s. Timing link suitability includes constraints ([12 After 11 by 90.0 to 120.0 days] [13 After 12 by 60.0 to 120.0 days]) The scheduling data was generated by CASM 23.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 14340 :visit-id "12" :proposal-version -1 :trans-version "20150609" :date "26-Jun-2015 00:48:06.0" :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 940928 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 14340 :visit-id "12" :obset-id "12" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 14340 :visit-id "12" :orbit-number 1 :pcs-time 333 :si-vis-utilization 3263 :al-overhead-at-end 0 :internal-dur-at-end 808 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3596 :pcs-gap 0 ) true 1 0 expect 952,000 e- from source in 5 sec exposure Predicted global count rate of 8411 c/s requires buffer time < 2e6/8400 = 237 c/s. Timing link suitability includes constraints ([13 After 12 by 60.0 to 120.0 days] [14 After 13 by 90.0 to 140.0 days]) The scheduling data was generated by CASM 23.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 14340 :visit-id "13" :proposal-version -1 :trans-version "20150609" :date "26-Jun-2015 00:48:57.0" :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 940928 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 14340 :visit-id "13" :obset-id "13" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 14340 :visit-id "13" :orbit-number 1 :pcs-time 333 :si-vis-utilization 3263 :al-overhead-at-end 0 :internal-dur-at-end 808 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3596 :pcs-gap 0 ) true 1 0 expect 952,000 e- from source in 5 sec exposure Predicted global count rate of 8411 c/s requires buffer time < 2e6/8400 = 237 c/s. Timing link suitability includes constraints ([14 After 13 by 90.0 to 140.0 days]) The scheduling data was generated by CASM 23.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 14340 :visit-id "14" :proposal-version -1 :trans-version "20150609" :date "26-Jun-2015 02:01:11.0" :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 940928 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 14340 :visit-id "14" :obset-id "14" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 14340 :visit-id "14" :orbit-number 1 :pcs-time 333 :si-vis-utilization 3263 :al-overhead-at-end 0 :internal-dur-at-end 808 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3596 :pcs-gap 0 ) true 1 0 expect 952,000 e- from source in 5 sec exposure Predicted global count rate of 8411 c/s requires buffer time < 2e6/8400 = 237 c/s. Timing link suitability includes constraints ([22 After 21 by 80.0 to 120.0 days]) The scheduling data was generated by CASM 23.2. CASM was run in Phase II mode. /private/var/folders/7m/1mtd7s2959n564sz5kj6q6qw0000gn/T/OPVisit2870073563062080652.xml (Tic-Visit :proposal-id 14340 :visit-id "21" :proposal-version -1 :trans-version "20150609" :date "10-Jul-2015 09:51:01.0" :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 245088 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 14340 :visit-id "21" :obset-id "21" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 14340 :visit-id "21" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2896 :al-overhead-at-end 0 :internal-dur-at-end 808 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3229 :pcs-gap 0 ) true 1 0 631,428 e- from source in 5 s exposure Global count rate of 2171 c/s requires buffer time < 2e6/2171 or 921 c/s. Use 600 to give a substantial margin Timing link suitability includes constraints ([22 After 21 by 80.0 to 120.0 days] [23 After 22 by 80.0 to 120.0 days]) The scheduling data was generated by CASM 23.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 14340 :visit-id "22" :proposal-version -1 :trans-version "20150609" :date "26-Jun-2015 00:49:47.0" :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 245088 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 14340 :visit-id "22" :obset-id "22" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 14340 :visit-id "22" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2896 :al-overhead-at-end 0 :internal-dur-at-end 808 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3229 :pcs-gap 0 ) true 1 0 631,428 e- from source in 5 s exposure Global count rate of 2171 c/s requires buffer time < 2e6/2171 or 921 c/s. Use 600 to give a substantial margin Timing link suitability includes constraints ([23 After 22 by 80.0 to 120.0 days] [24 After 23 by 80.0 to 140.0 days]) The scheduling data was generated by CASM 23.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 14340 :visit-id "23" :proposal-version -1 :trans-version "20150609" :date "26-Jun-2015 00:50:28.0" :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 245088 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 14340 :visit-id "23" :obset-id "23" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 14340 :visit-id "23" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2896 :al-overhead-at-end 0 :internal-dur-at-end 808 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3229 :pcs-gap 0 ) true 1 0 631,428 e- from source in 5 s exposure Global count rate of 2171 c/s requires buffer time < 2e6/2171 or 921 c/s. Use 600 to give a substantial margin Timing link suitability includes constraints ([24 After 23 by 80.0 to 140.0 days]) The scheduling data was generated by CASM 23.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 14340 :visit-id "24" :proposal-version -1 :trans-version "20150609" :date "26-Jun-2015 00:51:08.0" :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 245088 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 14340 :visit-id "24" :obset-id "24" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 14340 :visit-id "24" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2896 :al-overhead-at-end 0 :internal-dur-at-end 808 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3229 :pcs-gap 0 ) true 1 0 631,428 e- from source in 5 s exposure Global count rate of 2171 c/s requires buffer time < 2e6/2171 or 921 c/s. Use 600 to give a substantial margin