14741( 2) - 21-Jul-2016 20:46:19 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 14741 Version: 2 Check-in Time: 21-Jul-2016 20:46:19 STScI Edit Number: 0 Title MY Cam: can homogeneous evolution produce gravitational-wave progenitors? ------------------------------------------------------------------------------------ Type Cycle GO 24 ------------------------------------------------------------------------------------ Investigators Contact? PI: Dr. Ignacio Negueruela Universidad de Alicante, Dpto de Fisica Y CoI: Dr. Miriam Garcia Centro de Astrobiologia (CSIC/INTA) Inst. Y Nac. de Tec. Aero. CoI: Dr. Javier Lorenzo Universidad de Alicante, Dpto de Fisica N CoI: Dr. Paco Najarro Centro de Astrobiologia (CSIC/INTA) Inst. N Nac. de Tec. Aero. CoI: Dr. Jesus Maiz Apellaniz Centro de Astrobiologia (CSIC/INTA) Inst. N Nac. de Tec. Aero. CoI: Dr. Sergio Simon-Diaz Instituto de Astrofisica de Canarias N CoI: Dr. Amparo Marco Universidad de Alicante, Dpto de Fisica N CoI: Prof. Artemio Herrero Instituto de Astrofisica de Canarias N ------------------------------------------------------------------------------------ Abstract Besides opening the era of gravitational-wave astrophysics, GW150914 has revolutionized the field of massive stars. GW150914 proves the existence of stellar-mass black holes in a configuration that current models for stellar evolution can only reproduce in special conditions of homogeneous evolution and/or low metallicity. Only a handful of very-massive binaries that could lead to a binary black hole are known. We request UV spectroscopy of MY Cam (38Msun+32Msun), the best laboratory to test several predictions by current models, in order to derive stellar abundances and wind parameters that are inaccessible from the ground. Together with our previous photometric and spectroscopic exhaustive coverage, the STIS spectra will be key to characterize the pre-common envelope phase and test the homogeneous evolution hypothesis, critical ingredients of the different progenitor scenarios proposed to explain GW15091. ------------------------------------------------------------------------------------ Observations Description ------------------------ Summary: ---------------- The observations consist on 6 visits on MY Cam, 1 orbit long each, and 1 visit on ALS 7833 with a 2 orbit duration. Goal: ensure SNR>=10 at the spectral transitions of interest. Instrument configurations: STIS-E140M, and STIS-E230M with lambda_central= 1978A. Standard 0.2x0.2 echelle aperture. Details: ------------ 14741( 2) - 21-Jul-2016 20:46:19 - [ 2] Full UV coverage (1150-2381A), high resolution spectra (R \geq 30000) of the doubled-line binary system MY Cam and the control star ALS 7833. Both are bright targets and are located in the Milky Way. High spectral resolution is needed to de-blend the photospheric lines of MY Cam and measure abundances. Typical observing sequence for 1 orbit: - CCD imaging acquisition ACQ - (since we are using the standard 0.2x0.2 aperture, we do not request ACQ/PEAK acquisition). - E140M spectroscopy - E230M spectroscopy (only in half of the orbits) Relevant lines: - NV 1238.8, 1242.8, SiIV 1393.8, 1402.8, CIV 1548.2, 1550.8, NIV 1718.0, 1718.5. - CIV 1168.8, 1169, CIII 1175.7, NIII 1182, 1184, OIV 1339, 1343 and OV 1371. - Fe and Fe-group lines in the ~1250-1530A range. - The full E140M+230M coverage of 1150-2381A will additionally yield the extinction law towards MY CAM and ALS 7833. This point is crucial to accurately determine stellar luminosities, again crucial to the program. Exposure times: Calculated with the online STIS spectroscopic ETC v24.2 - UV flux simulated with observed Vmags, EBV, Rv. Castelli & Kurucz models - Average zodiacal, Earth-shine and air-glow - E140M setting: we expect signal to noise ratio SNR=30 at 1450A - E230M : SNR=10 at NIV1718.0, 1718.5 . Time constraints: We request observations of MY Cam at three epochs: quadrature and the 2 eclipses. We have accurate orbital parameters for MY Cam . Considering its short period (~1.2 days), we have broken all observations into separate visits to ensure observation of the required phases. We set a Timing requirement around the required phases, with asymmetric tolerance: 0.02*period before (to acount for time spent in acquisition) and 0.015*period after. This should be enough to enclose all the spectroscopic science exposures. The control star ALS 7833 is only requested in 1 epoch. Safety checks: ---------------------- - There exist no FUV spectra of any of the targets. - FUV flux estimated with ETC, spectral types, V-mags and extinction -> This produces no warning regarding local or global count rates The BOT reports GALEX unknowns, but they must actually be our targets. 14741( 2) - 21-Jul-2016 20:46:19 - [ 3] I have checked this in GALEXVIEW. MYCAM and ALS7833 are in the field GALEX-AIS-52, and they are the brightest UV sources with in a 2arcmin diameter. - FUV magnitudes from GALEX AIS: mFUV=12.025 (MY Cam) and 12.13 (ALS 7833). - Safe for our spectroscopic observations. - Acquisition: neutral filter F25ND3. MY Cam's photometric variability: - Amplitude of only 0.3 magnitudes in the optical range - No reported flares. - No detection in X-rays or the high-energy domain -> Short time-scale, hard-luminosity outbursts unlikely. ------------------------------------------------------------------------------------ 14741( 2) - 21-Jul-2016 20:46:19 - [ 4] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 MY-CAM STAR, MAIN SEQUENCE O RA=03H59M18.2925S +/- 0.0178", J2000 V = 9.67 +/- 0.15 TYPE=O5.5V+O6.5V; DEC=+57D14'13.72" +/- 0.0182" B-V=0.28; Rv=2.74; E(B-V)=0.56; F-CONT(1450)=1.2E-12; mFUV=12.025pm0.003 (GALEX) Reference Frame: ICRS Extended: NO Comments: Coordinates from Tycho-2 catalog. MY Cam is also in GSC2.3, with ID: NATB000186 . Optical photometric data and extinction from Negueruela+Marco (2008) and Haug (1970). UV flux [erg/cm2/s/A] estimated by the ETC, using a O7V template, LMC2-law applied before normalization, and average airglow, zodiacal and earthshine. ------------------------------------------------------------------------------------------------------------------------------------ 2 ALS7833 STAR, MAIN SEQUENCE O RA=03H59M7.4917S +/- 0.0241", J2000 V = 10.09 +/- 0.02 TYPE=O7V; B-V=0.28; DEC=+57D14'11.68" +/- 0.026" Rv=3.2; E(B-V)=0.56; F-CONT(1450)=1.5E-12; mFUV=12.13pm0.003 (GALEX) Reference Frame: ICRS Extended: NO Comments: Coordinates from Tycho-2 catalog. ALS7833 is also in GSC2.3, with ID: NATB000188 . Optical photometric data and extinction from Negueruela+Marco (2008) and Haug (1970). UV flux [erg/cm2/s/A] estimated by the ETC, using a O7V template, MW-law applied before normalization, and average airglow, zodiacal and earthshine. ------------------------------------------------------------------------------------------------------------------------------------ 14741( 2) - 21-Jul-2016 20:46:19 - [ 5] Visit: 01 (MYCAM-FUV-PHI0) Visit Requirements: Period 1.175392507 D AND ZERO-PHASE HJD2456948.292197 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 MY-CAM STIS/CCD ACQ F25ND3 MIRROR ACQTYPE=POINT 1 3 S (3 S) PHASE 0.98 TO 0.015 ------------------------------------------------------------------------------------------------------------------------------------ 2 MY-CAM STIS/FUV TIME-TA 0.2X0.2 E140M 1425 BUFFER-TIME=255. 1 2564. S -MAMA G (2564 S) ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ MY-CAM 1 STIS/CCD ACQ F25ND3 MIRROR none none none none 1 N/A MY-CAM 2 STIS/FUV TIME-TA 0.2X0.2 E140M 1425 none none none none 1 N/A -MAMA G 14741( 2) - 21-Jul-2016 20:46:19 - [ 6] Visit: 02 (MYCAM-NUV-PHI0) Visit Requirements: Period 1.175392507 D AND ZERO-PHASE HJD2456948.292197 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 MY-CAM STIS/CCD ACQ F25ND3 MIRROR ACQTYPE=POINT 1 3 S (3 S) PHASE 0.98 TO 0.015 ------------------------------------------------------------------------------------------------------------------------------------ 2 MY-CAM STIS/FUV TIME-TA 0.2X0.2 E140M 1425 BUFFER-TIME=255. 1 1000. S -MAMA G (1000 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 MY-CAM STIS/NUV TIME-TA 0.2X0.2 E230M 1978 BUFFER-TIME=133 1 1077 S -MAMA G (1077 S) ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ MY-CAM 1 STIS/CCD ACQ F25ND3 MIRROR none none none none 1 N/A MY-CAM 2 STIS/FUV TIME-TA 0.2X0.2 E140M 1425 none none none none 1 N/A -MAMA G MY-CAM 3 STIS/NUV TIME-TA 0.2X0.2 E230M 1978 none none none none 1 N/A -MAMA G 14741( 2) - 21-Jul-2016 20:46:19 - [ 7] Visit: 03 (MYCAM-FUV-PHI025) Visit Requirements: Period 1.175392507 D AND ZERO-PHASE HJD2456948.292197 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 MY-CAM STIS/CCD ACQ F25ND3 MIRROR ACQTYPE=POINT 1 3 S (3 S) PHASE 0.23 TO 0.265 ------------------------------------------------------------------------------------------------------------------------------------ 2 MY-CAM STIS/FUV TIME-TA 0.2X0.2 E140M 1425 BUFFER-TIME=255. 1 2564. S -MAMA G (2564 S) ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ MY-CAM 1 STIS/CCD ACQ F25ND3 MIRROR none none none none 1 N/A MY-CAM 2 STIS/FUV TIME-TA 0.2X0.2 E140M 1425 none none none none 1 N/A -MAMA G 14741( 2) - 21-Jul-2016 20:46:19 - [ 8] Visit: 04 (MYCAM-NUV-PHI025) Visit Requirements: Period 1.175392507 D AND ZERO-PHASE HJD2456948.292197 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 MY-CAM STIS/CCD ACQ F25ND3 MIRROR ACQTYPE=POINT 1 3 S (3 S) PHASE 0.23 TO 0.265 ------------------------------------------------------------------------------------------------------------------------------------ 2 MY-CAM STIS/FUV TIME-TA 0.2X0.2 E140M 1425 BUFFER-TIME=255. 1 1000. S -MAMA G (1000 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 MY-CAM STIS/NUV TIME-TA 0.2X0.2 E230M 1978 BUFFER-TIME=133 1 1077 S -MAMA G (1077 S) ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ MY-CAM 1 STIS/CCD ACQ F25ND3 MIRROR none none none none 1 N/A MY-CAM 2 STIS/FUV TIME-TA 0.2X0.2 E140M 1425 none none none none 1 N/A -MAMA G MY-CAM 3 STIS/NUV TIME-TA 0.2X0.2 E230M 1978 none none none none 1 N/A -MAMA G 14741( 2) - 21-Jul-2016 20:46:19 - [ 9] Visit: 05 (MYCAM-FUV-PHI05) Visit Requirements: Period 1.175392507 D AND ZERO-PHASE HJD2456948.292197 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 MY-CAM STIS/CCD ACQ F25ND3 MIRROR ACQTYPE=POINT 1 3 S (3 S) PHASE 0.48 TO 0.515 ------------------------------------------------------------------------------------------------------------------------------------ 2 MY-CAM STIS/FUV TIME-TA 0.2X0.2 E140M 1425 BUFFER-TIME=255. 1 2564. S -MAMA G (2564 S) ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ MY-CAM 1 STIS/CCD ACQ F25ND3 MIRROR none none none none 1 N/A MY-CAM 2 STIS/FUV TIME-TA 0.2X0.2 E140M 1425 none none none none 1 N/A -MAMA G 14741( 2) - 21-Jul-2016 20:46:19 - [ 10] Visit: 06 (MYCAM-NUV-PHI05) Visit Requirements: Period 1.175392507 D AND ZERO-PHASE HJD2456948.292197 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 MY-CAM STIS/CCD ACQ F25ND3 MIRROR ACQTYPE=POINT 1 3 S (3 S) PHASE 0.48 TO 0.515 ------------------------------------------------------------------------------------------------------------------------------------ 2 MY-CAM STIS/FUV TIME-TA 0.2X0.2 E140M 1425 BUFFER-TIME=255. 1 1000. S -MAMA G (1000 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 MY-CAM STIS/NUV TIME-TA 0.2X0.2 E230M 1978 BUFFER-TIME=133 1 1077 S -MAMA G (1077 S) ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ MY-CAM 1 STIS/CCD ACQ F25ND3 MIRROR none none none none 1 N/A MY-CAM 2 STIS/FUV TIME-TA 0.2X0.2 E140M 1425 none none none none 1 N/A -MAMA G MY-CAM 3 STIS/NUV TIME-TA 0.2X0.2 E230M 1978 none none none none 1 N/A -MAMA G 14741( 2) - 21-Jul-2016 20:46:19 - [ 11] Visit: 07 (ALS7833) Visit Requirements: 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 ALS7833 STIS/CCD ACQ F25ND3 MIRROR ACQTYPE=POINT 1 4 S (4 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 ALS7833 STIS/FUV TIME-TA 0.2X0.2 E140M 1425 BUFFER-TIME=210. 1 2560. S -MAMA G (2560 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 ALS7833 STIS/FUV TIME-TA 0.2X0.2 E140M 1425 BUFFER-TIME=210. 1 717 S (717 -MAMA G S) ------------------------------------------------------------------------------------------------------------------------------------ 4 ALS7833 STIS/NUV TIME-TA 0.2X0.2 E230M 1978 BUFFER-TIME=237 1 2000 S -MAMA G (2000 S) ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ ALS7833 1 STIS/CCD ACQ F25ND3 MIRROR none none none none 1 N/A ALS7833 2 STIS/FUV TIME-TA 0.2X0.2 E140M 1425 none none none none 1 N/A -MAMA G ALS7833 3 STIS/FUV TIME-TA 0.2X0.2 E140M 1425 none none none none 2 N/A -MAMA G ALS7833 4 STIS/NUV TIME-TA 0.2X0.2 E230M 1978 none none none none 2 N/A -MAMA G 14741( 2) - 21-Jul-2016 20:46:19 - [ 12] Summary Form for Proposal 14741 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures 0.2X0.2, F25ND3 ------------------------------------------------------------------------------------------------------------------------------------ Configurations STIS/CCD, STIS/FUV-MAMA, STIS/NUV-MAMA ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACQ, TIME-TAG ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters ACQTYPE=POINT, BUFFER-TIME=133, BUFFER-TIME=210., BUFFER-TIME=237, BUFFER-TIME=255. ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements PHASE 0.23 TO 0.265, PHASE 0.48 TO 0.515, PHASE 0.98 TO 0.015, Period 1.175392507 D AND ZERO-PHASE HJD2456948.292197 ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements E140M, E230M, MIRROR ------------------------------------------------------------------------------------------------------------------------------------ Target Names ALS7833, MY-CAM ------------------------------------------------------------------------------------------------------------------------------------