15942( 5) - 05-Mar-2020 16:00:18 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 15942 Version: 5 Check-in Time: 05-Mar-2020 16:00:18 STScI Edit Number: 0 Title Are the most massive stars in the Local Group truly single? ------------------------------------------------------------------------------------ Type Cycle GO 27 ------------------------------------------------------------------------------------ Investigators Contact? PI: Dr. Tomer Shenar Katholieke Universiteit Leuven Y CoI: Prof. Hugues Sana Katholieke Universiteit Leuven N CoI: Dr. Laurent Mahy Katholieke Universiteit Leuven N CoI: Dr. Rainer Hainich Universitat Potsdam N CoI: Dr. Lida Oskinova Universitat Potsdam N CoI: Dr. Andreas Sander Armagh Observatory N ------------------------------------------------------------------------------------ Abstract The chemical evolution and integrated appearance of galaxies are governed by the most massive stars they host. With masses in excess of 50 solar masses (Ms), these stars dominate entire clusters in terms of their energy production. They are ideal progenitors of superluminous / pair-instability supernovae, gamma-ray bursts, and the massive black holes identified through recent gravitational-wave detections. While fundamental to many of our models and predictions, we do not know how massive a star can become. Masses derived from binary orbits generally do not exceed 130Ms. In contrast, a few supposedly-single stars residing in R136 in the Large Magellanic Cloud (LMC) were reported to have masses exceeding 300Ms, twice the canonical upper-mass limit. These mass estimates, however, rely on one risky assumption: that the stars are single. The incidence of multiplicity among the massive stars and the very high crowding in R136 shed doubts on the single-star assumption and warrant a careful investigation of these stars. Several known binaries with components more massive than 100Ms have periods of the order of several months. And yet, the most massive stars in R136 have only been investigated on a time-base of a few weeks and with low-resolution spectroscopy. Here, we propose to collect 3 epochs of HST/STIS spectroscopy of the four most massive candidate stars in the Local Group - R136 a1, a2, a3, and c. With merely 6 orbits, and relying on data quality that is exclusive to the HST/STIS and vital for the study, our analysis will yield statistically-firm constraints on the multiplicity of these objects within a 90% detection limit up to a period of about three years. ------------------------------------------------------------------------------------ Observations Description ------------------------ Goal: Secure 3 epochs of optical spectra (G430 M 3936, 4706, 4961) per target for BAT99 106, 108, 109, and 112 (R136 a3, a1, a2, and c). We define two slit orientations: 1. A1-2: defined between R136 a1 and a2, centered at midpoint of R136 a1 and a2 (5:38:42.3978 -69:06:3.03 orient angle 109 / 289, position angle 64 / 249) 2. A3-C: defined between R136 a3 and c, centered at midpoint of R136 a3 and c 15942( 5) - 05-Mar-2020 16:00:18 - [ 2] (5:38:42.6166 -69:06:4.1785, orient angle 162.2 / 342.2, position angle 116.8 / 296.8) Due to crowding, slit positioning is relative to initial acquisition + peakup of the bright and isolated star BAT99 116 (Melnick 34, Brey 84). ------------------------------------------------------------------------------------ 15942( 5) - 05-Mar-2020 16:00:18 - [ 3] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 5 BAT99-116-MK STAR, WOLF RAYET - WN RA=05H38M44.2508S +/- 0.1", J2000 V = 13.09 +/- 0.01 B-V=0.25 -34 DEC=-69D06'6.01" +/- 0.1" Reference Frame: ICRS Extended: NO Comments: VEGAMAG Photometry from WFC3 F555W Early Release Obervation IB6WD6050 (De Marchi et al. 2011). ICRS astrometry of Melnick 34 from Gaia DR2 (Gaia DR2 4657685534828257792). Used for acquision due to severe crowding within R136 itself. Coordinates of Mk34 in *astrometricallty-uncorrecred" WFC image: '05 38 44.2416', '-69 06 5.930' Epoch of Position RA proper motion (seconds of time/yr) DEC Proper Motion (arcsec/yr) Annual Parallax (arcsec) 2000 3.5023705673837375E-4 7.53E-4 0.0 ------------------------------------------------------------------------------------------------------------------------------------ 6 A1-2 STAR, WOLF RAYET - WN RA-OFF=-1.86S, DEC-OFF=2.97", J2000 V = 12.28 FROM 5 Comments: Center between R136a1 and R136a2 (BAT99 108 and 109), -1.862 sec (RA) and 2.975 (DEC) offset relative to Brey 84 (Melnick 34). Determined from F336W WFC3 image of R136 (de Marchi et al. 2011, Crowther et al. 2016). Brightest cluster star in slit R136a1 (BAT99 108). VEGA V = 12.28 ------------------------------------------------------------------------------------------------------------------------------------ 7 A3-C STAR, WOLF RAYET - WN RA-OFF=-1.64S, DEC-OFF=1.82", J2000 V = 12.86 FROM 5 Comments: Center between R136a3 and R136c (BAT99 106 and 112), -1.62935 sec (RA) and 1.6715 (DEC) offset relative to Brey 84 (Melnick 34). Determined from F336W WFC3 image of R136 (de Marchi et al. 2011, Crowther et al. 2016). Brightest cluster star in slit R136 C (BAT99 112). VEGA V = 12.86 ------------------------------------------------------------------------------------------------------------------------------------ 1 BAT99-108-A1 STAR, WOLF RAYET - WN RA=05H38M42.3870S, J2000 V = 12.28 DEC=-69D06'3.03" Reference Frame: ICRS Comments: coordinates obtained from attached astrometrically-corrected WFC3 r136_thumb_ast.fits image. Epoch of Position RA proper motion (seconds of time/yr) DEC Proper Motion (arcsec/yr) Annual Parallax (arcsec) 2015.5 0.0 0.0 0.0 ------------------------------------------------------------------------------------------------------------------------------------ 15942( 5) - 05-Mar-2020 16:00:18 - [ 4] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 2 BAT99-109-A2 STAR, WOLF RAYET - WN RA=05H38M42.4020S, J2000 V = 12.80 DEC=-69D06'2.98" Reference Frame: ICRS Comments: coordinates obtained from attached astrometrically-corrected WFC3 r136_thumb_ast.fits image. Epoch of Position RA proper motion (seconds of time/yr) DEC Proper Motion (arcsec/yr) Annual Parallax (arcsec) 2015.5 0.0 0.0 0.0 ------------------------------------------------------------------------------------------------------------------------------------ 3 BAT99-106-A3 STAR, WOLF RAYET - WN RA=05H38M42.3280S, J2000 V = 12.97 DEC=-69D06'3.39" Reference Frame: ICRS Comments: coordinates obtained from attached astrometrically-corrected WFC3 r136_thumb_ast.fits image. Epoch of Position RA proper motion (seconds of time/yr) DEC Proper Motion (arcsec/yr) Annual Parallax (arcsec) 2015.5 0.0 0.0 0.0 ------------------------------------------------------------------------------------------------------------------------------------ 4 BAT99-112-C STAR, WOLF RAYET - WN RA=05H38M42.9030S, J2000 V = 12.86 DEC=-69D06'4.94" Reference Frame: ICRS Comments: coordinates obtained from attached astrometrically-corrected WFC3 r136_thumb_ast.fits image. Epoch of Position RA proper motion (seconds of time/yr) DEC Proper Motion (arcsec/yr) Annual Parallax (arcsec) 2015.5 0.0 0.0 0.0 ------------------------------------------------------------------------------------------------------------------------------------ 15942( 5) - 05-Mar-2020 16:00:18 - [ 5] Patterns ------------------------------------------------------------------------------------------------------------------------------------ Pattern_Number: 4 Primary_Pattern Secondary_Pattern Pattern_Type STIS-ALONG-SLIT Pattern_Purpose DITHER Number_Of_Points 2 Point_Spacing 0.35546 Line_Spacing Coordinate_Frame POS-TARG Pattern_Orient 90.0 Angle_Between_Sides Center_Pattern NO Pattern_Comments: 0.35546 arcsec = 7 CCD pixels x 0.05078 arcsec/pix (= pixels over which 1D spectra extracted) ------------------------------------------------------------------------------------------------------------------------------------ 15942( 5) - 05-Mar-2020 16:00:18 - [ 6] Visit: 01 (A1-2,first epoch) Visit Requirements: SCHED 80%; ORIENT 106D TO 106 D; ORIENT 286D TO 286 D On Hold Comments: Additional Comments: Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 BAT99-116-M STIS/CCD ACQ F28X50LP MIRROR 1 1 S (1 S) K-34 Comments: ETC predicts S/N=174 for 1 sec exposure through F28X50LP aperture for Melnick 34 (V=13.09). ------------------------------------------------------------------------------------------------------------------------------------ 2 BAT99-116-M STIS/CCD ACQ/PEA 52X0.1 MIRROR 1 0.5 S (0.5 K-34 K S) Comments: Peakup on Melnick 34 for accurate positioning prior to offset. ETC predicts 58, 000 e- from source in 0.5 sec exposure through 52x0.1 aperture for Melnick 34 (V=13.09), order of magnitude below saturation level. ------------------------------------------------------------------------------------------------------------------------------------ 3 A1-2 STIS/CCD ACCUM 52X0.1 G430M 3936 CR-SPLIT=NO 1 450 S PATTERN 4 3 see below (380 S) Comments: ETC run for fainter R136a2: 1367278 ETC runs performed for exposure times in first phase II submission. The exposure times in ths second submission are somewhat shorter, S/N and other parameters are easily scalable. ------------------------------------------------------------------------------------------------------------------------------------ 4 A1-2 STIS/CCD ACCUM 52X0.1 G430M 4706 CR-SPLIT=NO 1 450 S PATTERN 4 4 see below (380 S) Comments: ETC run for fainter R136a2:1367279 ETC runs performed for exposure times in first phase II submission. The exposure times in ths second submission are slightly shorter, S/N and other parameters are easily scalable. ------------------------------------------------------------------------------------------------------------------------------------ 15942( 5) - 05-Mar-2020 16:00:18 - [ 7] Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 5 A1-2 STIS/CCD ACCUM 52X0.1 G430M 4961 CR-SPLIT=NO 1 450 S PATTERN 4 5 see below (608 S) Comments: ETC run for fainter R136a2: 1367422 ETC runs performed for exposure times in first phase II submission. The exposure times in ths second submission are slightly shorter, S/N and other parameters are easily scalable. ------------------------------------------------------------------------------------------------------------------------------------ Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ BAT99-116-MK-34 1 STIS/CCD ACQ F28X50LP MIRROR none none none none 1 N/A BAT99-116-MK-34 2 STIS/CCD ACQ/PEA 52X0.1 MIRROR none none none none 1 N/A K A1-2 3 STIS/CCD ACCUM 52X0.1 G430M 3936 1 none none none 1 190.0 S A1-2 3 STIS/CCD ACCUM 52X0.1 G430M 3936 2 none none none 1 190.0 S A1-2 4 STIS/CCD ACCUM 52X0.1 G430M 4706 1 none none none 1 190.0 S A1-2 4 STIS/CCD ACCUM 52X0.1 G430M 4706 2 none none none 1 190.0 S A1-2 5 STIS/CCD ACCUM 52X0.1 G430M 4961 1 none none none 1 304.0 S A1-2 5 STIS/CCD ACCUM 52X0.1 G430M 4961 2 none none none 1 304.0 S 15942( 5) - 05-Mar-2020 16:00:18 - [ 8] Visit: 02 (A1-2, second epoch) Visit Requirements: SCHED 70%; ORIENT 106D TO 106 D; ORIENT 286D TO 286 D; AFTER 01 BY 50 D TO 230 D On Hold Comments: Additional Comments: Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 BAT99-116-M STIS/CCD ACQ F28X50LP MIRROR 1 1 S (1 S) K-34 Comments: ETC predicts S/N=174 for 1 sec exposure through F28X50LP aperture for Melnick 34 (V=13.09). ------------------------------------------------------------------------------------------------------------------------------------ 2 BAT99-116-M STIS/CCD ACQ/PEA 52X0.1 MIRROR 1 0.5 S (0.5 K-34 K S) Comments: Peakup on Melnick 34 for accurate positioning prior to offset. ETC predicts 58, 000 e- from source in 0.5 sec exposure through 52x0.1 aperture for Melnick 34 (V=13.09), order of magnitude below saturation level. ------------------------------------------------------------------------------------------------------------------------------------ 3 A1-2 STIS/CCD ACCUM 52X0.1 G430M 3936 CR-SPLIT=NO 1 450 S PATTERN 4 3 see below (394 S) Comments: ETC run for fainter R136a2: 1367278 ETC runs performed for exposure times in first phase II submission. The exposure times in ths second submission are slightly shorter, S/N and other parameters are easily scalable. ------------------------------------------------------------------------------------------------------------------------------------ 4 A1-2 STIS/CCD ACCUM 52X0.1 G430M 4706 CR-SPLIT=NO 1 450 S PATTERN 4 4 see below (394 S) Comments: ETC run for fainter R136a2:1367279 ETC runs performed for exposure times in first phase II submission. The exposure times in ths second submission are slightly shorter, S/N and other parameters are easily scalable. ------------------------------------------------------------------------------------------------------------------------------------ 15942( 5) - 05-Mar-2020 16:00:18 - [ 9] Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 5 A1-2 STIS/CCD ACCUM 52X0.1 G430M 4961 CR-SPLIT=NO 1 450 S PATTERN 4 5 see below (622 S) Comments: ETC run for fainter R136a2: 1367422 ETC runs performed for exposure times in first phase II submission. The exposure times in ths second submission are slightly shorter, S/N and other parameters are easily scalable. ------------------------------------------------------------------------------------------------------------------------------------ Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ BAT99-116-MK-34 1 STIS/CCD ACQ F28X50LP MIRROR none none none none 1 N/A BAT99-116-MK-34 2 STIS/CCD ACQ/PEA 52X0.1 MIRROR none none none none 1 N/A K A1-2 3 STIS/CCD ACCUM 52X0.1 G430M 3936 1 none none none 1 197.0 S A1-2 3 STIS/CCD ACCUM 52X0.1 G430M 3936 2 none none none 1 197.0 S A1-2 4 STIS/CCD ACCUM 52X0.1 G430M 4706 1 none none none 1 197.0 S A1-2 4 STIS/CCD ACCUM 52X0.1 G430M 4706 2 none none none 1 197.0 S A1-2 5 STIS/CCD ACCUM 52X0.1 G430M 4961 1 none none none 1 311.0 S A1-2 5 STIS/CCD ACCUM 52X0.1 G430M 4961 2 none none none 1 311.0 S 15942( 5) - 05-Mar-2020 16:00:18 - [ 10] Visit: 03 (A1-2, third epoch) Visit Requirements: SCHED 70%; ORIENT 106D TO 106 D; ORIENT 286D TO 286 D; AFTER 01 BY 250 D TO 540 D On Hold Comments: Additional Comments: Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 BAT99-116-M STIS/CCD ACQ F28X50LP MIRROR 1 1 S (1 S) K-34 Comments: ETC predicts S/N=174 for 1 sec exposure through F28X50LP aperture for Melnick 34 (V=13.09). ------------------------------------------------------------------------------------------------------------------------------------ 2 BAT99-116-M STIS/CCD ACQ/PEA 52X0.1 MIRROR 1 0.5 S (0.5 K-34 K S) Comments: Peakup on Melnick 34 for accurate positioning prior to offset. ETC predicts 58, 000 e- from source in 0.5 sec exposure through 52x0.1 aperture for Melnick 34 (V=13.09), order of magnitude below saturation level. ------------------------------------------------------------------------------------------------------------------------------------ 3 A1-2 STIS/CCD ACCUM 52X0.1 G430M 3936 CR-SPLIT=NO 1 450 S PATTERN 4 3 see below (394 S) Comments: ETC run for fainter R136a2: 1367278 ETC runs performed for exposure times in first phase II submission. The exposure times in ths second submission are slightly shorter, S/N and other parameters are easily scalable. ------------------------------------------------------------------------------------------------------------------------------------ 4 A1-2 STIS/CCD ACCUM 52X0.1 G430M 4706 CR-SPLIT=NO 1 450 S PATTERN 4 4 see below (394 S) Comments: ETC run for fainter R136a2:1367279 ETC runs performed for exposure times in first phase II submission. The exposure times in ths second submission are slightly shorter, S/N and other parameters are easily scalable. ------------------------------------------------------------------------------------------------------------------------------------ 15942( 5) - 05-Mar-2020 16:00:18 - [ 11] Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 5 A1-2 STIS/CCD ACCUM 52X0.1 G430M 4961 CR-SPLIT=NO 1 450 S PATTERN 4 5 see below (622 S) Comments: ETC run for fainter R136a2: 1367422 ETC runs performed for exposure times in first phase II submission. The exposure times in ths second submission are slightly shorter, S/N and other parameters are easily scalable. ------------------------------------------------------------------------------------------------------------------------------------ Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ BAT99-116-MK-34 1 STIS/CCD ACQ F28X50LP MIRROR none none none none 1 N/A BAT99-116-MK-34 2 STIS/CCD ACQ/PEA 52X0.1 MIRROR none none none none 1 N/A K A1-2 3 STIS/CCD ACCUM 52X0.1 G430M 3936 1 none none none 1 197.0 S A1-2 3 STIS/CCD ACCUM 52X0.1 G430M 3936 2 none none none 1 197.0 S A1-2 4 STIS/CCD ACCUM 52X0.1 G430M 4706 1 none none none 1 197.0 S A1-2 4 STIS/CCD ACCUM 52X0.1 G430M 4706 2 none none none 1 197.0 S A1-2 5 STIS/CCD ACCUM 52X0.1 G430M 4961 1 none none none 1 311.0 S A1-2 5 STIS/CCD ACCUM 52X0.1 G430M 4961 2 none none none 1 311.0 S 15942( 5) - 05-Mar-2020 16:00:18 - [ 12] Visit: 04 (A3-c, first epoch) Visit Requirements: SCHED 90%; ORIENT 162.2D TO 162.2 D; ORIENT 342.2D TO 342.2 D On Hold Comments: Additional Comments: Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 BAT99-116-M STIS/CCD ACQ F28X50LP MIRROR 1 1 S (1 S) K-34 ------------------------------------------------------------------------------------------------------------------------------------ 2 BAT99-116-M STIS/CCD ACQ/PEA 52X0.1 MIRROR 1 0.5 S (0.5 K-34 K S) ------------------------------------------------------------------------------------------------------------------------------------ 3 A3-C STIS/CCD ACCUM 52X0.1 G430M 3936 CR-SPLIT=NO 1 450 S PATTERN 4 3 see below (292 S) Comments: ETC run for fainter R136c: 1367432 ETC runs performed for exposure times in first phase II submission. The exposure times in ths second submission are slightly shorter, S/N and other parameters are easily scalable. ------------------------------------------------------------------------------------------------------------------------------------ 4 A3-C STIS/CCD ACCUM 52X0.1 G430M 4706 CR-SPLIT=NO 1 450 S PATTERN 4 4 see below (292 S) Comments: ETC run for fainter R136c: 1367433 ETC runs performed for exposure times in first phase II submission. The exposure times in ths second submission are slightly shorter, S/N and other parameters are easily scalable. ------------------------------------------------------------------------------------------------------------------------------------ 5 A3-C STIS/CCD ACCUM 52X0.1 G430M 4961 CR-SPLIT=NO 1 450 S PATTERN 4 5 see below (692 S) Comments: ETC run for fainter R136c: 1367434 ETC runs performed for exposure times in first phase II submission. The exposure times in ths second submission are slightly shorter, S/N and other parameters are easily scalable. ------------------------------------------------------------------------------------------------------------------------------------ Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ 15942( 5) - 05-Mar-2020 16:00:18 - [ 13] Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ BAT99-116-MK-34 1 STIS/CCD ACQ F28X50LP MIRROR none none none none 1 N/A BAT99-116-MK-34 2 STIS/CCD ACQ/PEA 52X0.1 MIRROR none none none none 1 N/A K A3-C 3 STIS/CCD ACCUM 52X0.1 G430M 3936 1 none none none 1 146.0 S A3-C 3 STIS/CCD ACCUM 52X0.1 G430M 3936 2 none none none 1 146.0 S A3-C 4 STIS/CCD ACCUM 52X0.1 G430M 4706 1 none none none 1 146.0 S A3-C 4 STIS/CCD ACCUM 52X0.1 G430M 4706 2 none none none 1 146.0 S A3-C 5 STIS/CCD ACCUM 52X0.1 G430M 4961 1 none none none 1 346.0 S A3-C 5 STIS/CCD ACCUM 52X0.1 G430M 4961 2 none none none 1 346.0 S 15942( 5) - 05-Mar-2020 16:00:18 - [ 14] Visit: 05 (A3-c, second epoch) Visit Requirements: SCHED 50%; ORIENT 162.2D TO 162.2 D; ORIENT 342.2D TO 342.2 D; AFTER 04 BY 50 D TO 230 D On Hold Comments: Additional Comments: Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 BAT99-116-M STIS/CCD ACQ F28X50LP MIRROR 1 1 S (1 S) K-34 ------------------------------------------------------------------------------------------------------------------------------------ 2 BAT99-116-M STIS/CCD ACQ/PEA 52X0.1 MIRROR 1 0.5 S (0.5 K-34 K S) ------------------------------------------------------------------------------------------------------------------------------------ 3 A3-C STIS/CCD ACCUM 52X0.1 G430M 3936 CR-SPLIT=NO 1 450 S PATTERN 4 3 see below (374 S) Comments: ETC run for fainter R136c: 1367432 ETC runs performed for exposure times in first phase II submission. The exposure times in ths second submission are slightly shorter, S/N and other parameters are easily scalable. ------------------------------------------------------------------------------------------------------------------------------------ 4 A3-C STIS/CCD ACCUM 52X0.1 G430M 4706 CR-SPLIT=NO 1 450 S PATTERN 4 4 see below (374 S) Comments: ETC run for fainter R136c: 1367433 ETC runs performed for exposure times in first phase II submission. The exposure times in ths second submission are slightly shorter, S/N and other parameters are easily scalable. ------------------------------------------------------------------------------------------------------------------------------------ 5 A3-C STIS/CCD ACCUM 52X0.1 G430M 4961 CR-SPLIT=NO 1 450 S PATTERN 4 5 see below (774 S) Comments: ETC run for fainter R136c: 1367434 ETC runs performed for exposure times in first phase II submission. The exposure times in ths second submission are slightly shorter, S/N and other parameters are easily scalable. ------------------------------------------------------------------------------------------------------------------------------------ Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ 15942( 5) - 05-Mar-2020 16:00:18 - [ 15] Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ BAT99-116-MK-34 1 STIS/CCD ACQ F28X50LP MIRROR none none none none 1 N/A BAT99-116-MK-34 2 STIS/CCD ACQ/PEA 52X0.1 MIRROR none none none none 1 N/A K A3-C 3 STIS/CCD ACCUM 52X0.1 G430M 3936 1 none none none 1 187.0 S A3-C 3 STIS/CCD ACCUM 52X0.1 G430M 3936 2 none none none 1 187.0 S A3-C 4 STIS/CCD ACCUM 52X0.1 G430M 4706 1 none none none 1 187.0 S A3-C 4 STIS/CCD ACCUM 52X0.1 G430M 4706 2 none none none 1 187.0 S A3-C 5 STIS/CCD ACCUM 52X0.1 G430M 4961 1 none none none 1 387.0 S A3-C 5 STIS/CCD ACCUM 52X0.1 G430M 4961 2 none none none 1 387.0 S 15942( 5) - 05-Mar-2020 16:00:18 - [ 16] Visit: 06 (A3-c, third epoch) Visit Requirements: SCHED 30%; ORIENT 162.2D TO 162.2 D; ORIENT 342.2D TO 342.2 D; AFTER 04 BY 250 D TO 540 D On Hold Comments: Additional Comments: Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 BAT99-116-M STIS/CCD ACQ F28X50LP MIRROR 1 1 S (1 S) K-34 ------------------------------------------------------------------------------------------------------------------------------------ 2 BAT99-116-M STIS/CCD ACQ/PEA 52X0.1 MIRROR 1 0.5 S (0.5 K-34 K S) ------------------------------------------------------------------------------------------------------------------------------------ 3 A3-C STIS/CCD ACCUM 52X0.1 G430M 3936 CR-SPLIT=NO 1 450 S PATTERN 4 3 see below (442 S) Comments: ETC run for fainter R136c: 1367432 ETC runs performed for exposure times in first phase II submission. The exposure times in ths second submission are slightly shorter, S/N and other parameters are easily scalable. ------------------------------------------------------------------------------------------------------------------------------------ 4 A3-C STIS/CCD ACCUM 52X0.1 G430M 4706 CR-SPLIT=NO 1 450 S PATTERN 4 4 see below (442 S) Comments: ETC run for fainter R136c: 1367433 ETC runs performed for exposure times in first phase II submission. The exposure times in ths second submission are slightly shorter, S/N and other parameters are easily scalable. ------------------------------------------------------------------------------------------------------------------------------------ 5 A3-C STIS/CCD ACCUM 52X0.1 G430M 4961 CR-SPLIT=NO 1 450 S PATTERN 4 5 see below (842 S) Comments: ETC run for fainter R136c: 1367434 ETC runs performed for exposure times in first phase II submission. The exposure times in ths second submission are slightly shorter, S/N and other parameters are easily scalable. ------------------------------------------------------------------------------------------------------------------------------------ Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ 15942( 5) - 05-Mar-2020 16:00:18 - [ 17] Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ BAT99-116-MK-34 1 STIS/CCD ACQ F28X50LP MIRROR none none none none 1 N/A BAT99-116-MK-34 2 STIS/CCD ACQ/PEA 52X0.1 MIRROR none none none none 1 N/A K A3-C 3 STIS/CCD ACCUM 52X0.1 G430M 3936 1 none none none 1 221.0 S A3-C 3 STIS/CCD ACCUM 52X0.1 G430M 3936 2 none none none 1 221.0 S A3-C 4 STIS/CCD ACCUM 52X0.1 G430M 4706 1 none none none 1 221.0 S A3-C 4 STIS/CCD ACCUM 52X0.1 G430M 4706 2 none none none 1 221.0 S A3-C 5 STIS/CCD ACCUM 52X0.1 G430M 4961 1 none none none 1 421.0 S A3-C 5 STIS/CCD ACCUM 52X0.1 G430M 4961 2 none none none 1 421.0 S 15942( 5) - 05-Mar-2020 16:00:18 - [ 18] Summary Form for Proposal 15942 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures 52X0.1, F28X50LP ------------------------------------------------------------------------------------------------------------------------------------ Configurations STIS/CCD ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACCUM, ACQ, ACQ/PEAK ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters CR-SPLIT=NO ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements AFTER 01 BY 250 D TO 540 D, AFTER 01 BY 50 D TO 230 D, AFTER 04 BY 250 D TO 540 D, AFTER 04 BY 50 D TO 230 D, ORIENT 106D TO 106 D, ORIENT 162.2D TO 162.2 D, ORIENT 286D TO 286 D, ORIENT 342.2D TO 342.2 D, PATTERN 4 3, PATTERN 4 4, PATTERN 4 5, SCHED 30%, SCHED 50%, SCHED 70%, SCHED 80%, SCHED 90% ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements G430M, MIRROR ------------------------------------------------------------------------------------------------------------------------------------ Target Names A1-2, A3-C, BAT99-116-MK-34 ------------------------------------------------------------------------------------------------------------------------------------