MISSING FRINGE FLAT CALIBRATION MISSING FRINGE FLAT CALIBRATION MISSING FRINGE FLAT CALIBRATION MISSING FRINGE FLAT CALIBRATION MISSING FRINGE FLAT CALIBRATION MISSING FRINGE FLAT CALIBRATION MISSING FRINGE FLAT CALIBRATION MISSING FRINGE FLAT CALIBRATION MISSING FRINGE FLAT CALIBRATION MISSING FRINGE FLAT CALIBRATION MISSING FRINGE FLAT CALIBRATION MISSING FRINGE FLAT CALIBRATION MISSING FRINGE FLAT CALIBRATION MISSING FRINGE FLAT CALIBRATION MISSING FRINGE FLAT CALIBRATION MISSING FRINGE FLAT CALIBRATION MISSING FRINGE FLAT CALIBRATION MISSING FRINGE FLAT CALIBRATION MISSING FRINGE FLAT CALIBRATION MISSING FRINGE FLAT CALIBRATION First revised Phase 2 submission. ETC calcs updated for correct slit width and gain Ignore missing fringe flat warnings as multiple dedicated in-orbit and occultation flat field exposures have been included -373113672 ----- Attempting Submission 1 (Thu May 31 20:27:42 GMT 2018) ----- Ignore erroneous missing fringe-flat warnings: multiple dedicated in-orbit and occultation flat field exposures have been included for each visit Resolving a possible problem with the interstellar C60+ assignment New innovations in laboratory spectroscopy at ultra-low temperatures have provided strong evidence for the presence of C60+ (ionized Buckminsterfullerene) in the diffuse interstellar medium (ISM). The attribution of two interstellar absorption bands near 0.96 microns to electronic transitions of C60+ is now quite widely accepted, but irrefutable identification of C60+ requires a match between the wavelengths and the strengths of all five absorption features detectable in the laboratory and in space. Although Walker et al. [10, 20] claimed a ground-based detection of the crucial (third-strongest) 9428 A band towards HD 169454, its presence has been contested [8], and this band has not been conclusively seen in any line-of-sight to-date. Our latest HST observations from early 2018 provide new evidence for the weakness/lack of this band, casting renewed doubt on the C60+ assignment. To confirm this preliminary HST result, we request urgent observations of additional heavily-reddened interstellar sightlines to fully disentangle the stellar spectrum and provide a reliable measurement of the 9428/9577 band strength ratio. These data (combined with our previous HST observations) are required in order to rigorously confirm or reject a match between the interstellar and laboratory C60+ features. The target stars will be acquired at the center of the 52x0.1'' slit (at row 512) then moved to CCD row 300 for the start of the STIS-scan routine. After an initial fringe flat exposure, each target star will be exposed while scanning up the slit by 36'' to row 1000 (scan rates are all less than the maximum FGS tracking rate of 4.8''/sec). After readout, the star will be repositioned at row 300 and a second identical science exposure will be performed. Next, a sequence of two contemporaneous flat-field exposures will be obtained (without moving the slit mechanism), followed by two additional STIS-scan exposures of the target star. Additional wavecal and fringe flats will be obtained during occultation to improve the flat-field statistics and accuracy of the wavelength scale. The exposure times are designed to reach a total S/N (summed over four exposures) of ~> 1000 per column (allowing for ~10% flux losses due to scattered light not accounted for by the ETC). As a result of STIS scanning, the total star counts per exposure (with <~1e6 counts per dispersion bin) will be spread over 700 (spatial) CCD rows instead of the 7 rows assumed by the ETC. Consequently, counts per pixel per exposure will be <~1500, which is well within the CCD linearity threshold for GAIN=1 Stellar Physics 6 false false false false false false false AVAILABLE STAR MAIN SEQUENCE O This object was generated by the targetselector and retrieved from the SIMBAD database. J2000 J2000 J=5.1 STAR B0-B2 III-I This object was generated by the targetselector and retrieved from the SIMBAD database. J2000 J2000 J=4.5 STAR B0-B2 III-I This object was generated by the targetselector and retrieved from the SIMBAD database. J2000 J2000 J=5.7 STAR B6-B9.5 III-I This object was generated by the targetselector and retrieved from the SIMBAD database. J2000 J2000 J=5.1 STAR B6-B9.5 V-IV This object was generated by the targetselector and retrieved from the SIMBAD database. J2000 J2000 J=4.5 STIS/CCD Spectroscopic No No G750M 9336 STIS/CCD Spectroscopic No No G750M 9336 STIS/CCD Spectroscopic No No G750M 9336 STIS/CCD Spectroscopic No No G750M 9336 STIS/CCD Spectroscopic No No G750M 9336 The scheduling data was generated by CASM 26.0. CASM was run in Phase II mode. /Users/mcordine/work/proposals/HST/STIS25mid2/OP-cache/C60_phase2-v01.xml (Tic-Visit :proposal-id 15478 :visit-id "01" :proposal-version -1 :trans-version "20180409" :date "31-May-2018 16:18:34.0" :trans-errors '(:WARNINGS 4 :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 387456 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 15478 :visit-id "01" :obset-id "01" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 15478 :visit-id "01" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2930 :al-overhead-at-end 0 :internal-dur-at-end 2428 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3298 :pcs-gap 0 ) true 1 0 The scheduling data was generated by CASM 26.0. CASM was run in Phase II mode. /Users/mcordine/work/proposals/HST/STIS25mid2/OP-cache/C60_phase2-v02.xml (Tic-Visit :proposal-id 15478 :visit-id "02" :proposal-version -1 :trans-version "20180409" :date "28-May-2018 15:34:35.0" :trans-errors '(:WARNINGS 4 :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 387456 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 15478 :visit-id "02" :obset-id "02" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 15478 :visit-id "02" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2888 :al-overhead-at-end 0 :internal-dur-at-end 2428 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3240 :pcs-gap 0 ) true 1 0 The scheduling data was generated by CASM 26.0. CASM was run in Phase II mode. /Users/mcordine/work/proposals/HST/STIS25mid2/OP-cache/C60_phase2-v03.xml (Tic-Visit :proposal-id 15478 :visit-id "03" :proposal-version -1 :trans-version "20180409" :date "28-May-2018 15:34:38.0" :trans-errors '(:WARNINGS 4 :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 350640 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 15478 :visit-id "03" :obset-id "03" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 15478 :visit-id "03" :orbit-number 1 :pcs-time 333 :si-vis-utilization 3070 :al-overhead-at-end 0 :internal-dur-at-end 2124 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3449 :pcs-gap 0 ) true 1 0 The scheduling data was generated by CASM 26.0. CASM was run in Phase II mode. /Users/mcordine/work/proposals/HST/STIS25mid2/OP-cache/C60_phase2-v04.xml (Tic-Visit :proposal-id 15478 :visit-id "04" :proposal-version -1 :trans-version "20180409" :date "28-May-2018 15:34:46.0" :trans-errors '(:WARNINGS 4 :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 387456 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 15478 :visit-id "04" :obset-id "04" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 15478 :visit-id "04" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2878 :al-overhead-at-end 0 :internal-dur-at-end 2428 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3216 :pcs-gap 0 ) true 1 0 The scheduling data was generated by CASM 26.0. CASM was run in Phase II mode. /Users/mcordine/work/proposals/HST/STIS25mid2/OP-cache/C60_phase2-v05.xml (Tic-Visit :proposal-id 15478 :visit-id "05" :proposal-version -1 :trans-version "20180409" :date "28-May-2018 15:34:49.0" :trans-errors '(:WARNINGS 4 :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 387456 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 15478 :visit-id "05" :obset-id "05" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 15478 :visit-id "05" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2826 :al-overhead-at-end 0 :internal-dur-at-end 2428 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3217 :pcs-gap 0 ) true 1 0