13629( 5) - 27-Mar-2014 12:39:22 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 13629 Version: 5 Check-in Time: 27-Mar-2014 12:39:22 STScI Edit Number: 4 Title Characterizing the high-energy properties of a highly magnetized star ------------------------------------------------------------------------------------ Type Cycle GO 22 ------------------------------------------------------------------------------------ Investigators Contact? PI: Dr. Yael Naze Universite de Liege Y CoI: Dr. Gregor Rauw Universite de Liege N CoI: Dr. Veronique Petit University of Delaware N CoI: Dr. Asif ud-Doula The Pennsylvania State University N CoI: Dr. Gregg A. Wade Royal Military College of Canada N CoI: Dr. Alexander W. Fullerton Space Telescope Science Institute N CoI: Dr. Nolan R. Walborn Space Telescope Science Institute N CoI: Dr. Rodolfo H. Barba Universidad de La Serena N CoI: Dr. Jon O. Sundqvist Universitats-Sternwarte Munchen N ------------------------------------------------------------------------------------ Abstract CPD-28 2561 is the only known magnetic O-star without high-energy observations. However, because of the particular geometry of this object, it represents a crucial step towards a full understanding of the dynamic magnetospheres of high-mass stars. We propose to fill this gap by observing it in X-rays as well as in UV, both with high-resolution and with a monitoring to sample crucial phases. These complementary data will help us constrain the energetics, shock physics and 3D structure of the magnetosphere of this unique object. ------------------------------------------------------------------------------------ Observations Description ------------------------ This program is designed to obtain UV spectroscopy of the magnetic massive star CPD-28D2561 with HST/STIS in order to diagnose the density and velocity structure of the cooler material trapped in its magnetosphere. This information will provide the context required to interpret contemporaneously acquired X-ray spectra from XMM-Newton correctly, and to model both the hot and cool components of the star's circumstellar enviroment completely. STIS/E140M observations are planned at 3 phases of the 73.41-day rotation period in order to constrain the magnetospheric structure at 3 different orientations. The phases correspond to two maxima (as defined by the variation of Halpha equivalent width; these are phases 0.0 and 0.5) and one minimum (either 0.25 or 0.75). The E140M grating provides optimal wavelength coverage and resolution of the resonance lines that are key to the analysis. Adequate S/N (about 50) can be obtained for each of the 3 visits in a single orbit. The target does not violate health or safety limits in this configuration. Real Time Justification ----------------------- N/A Calibration Justification 13629( 5) - 27-Mar-2014 12:39:22 - [ 2] ------------------------- N/A Additional Comments ------------------- N/A ------------------------------------------------------------------------------------ 13629( 5) - 27-Mar-2014 12:39:22 - [ 3] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 CPD-28D2561 STAR, OF RA=07H55M52.8506S, J2000 V = 10.09 B-V=0.04 DEC=-28D37'46.79" Reference Frame: ICRS Comments: This object was generated by the targetselector and retrieved from the SIMBAD database. ------------------------------------------------------------------------------------------------------------------------------------ 13629( 5) - 27-Mar-2014 12:39:22 - [ 4] Visit: 01 Visit Requirements: Period 73.41 D AND ZERO-PHASE HJD2454645.49; GROUP 01, 02, 03 WITHIN 73.4D On Hold Comments: Additional Comments: This exposure should be taken at phase=0. +- 0.02 We would prefer to have all data taken within the same 73d period and simultaneously with XMM if possible (i.e. either the 73.4d cycle in May-June or the 73.4d cycle in Nov-Dec 2014). 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 CPD-28D2561 STIS/CCD ACQ F28X50OII MIRROR 1 1 S (1 S) PHASE 0.98 TO 0.02 ------------------------------------------------------------------------------------------------------------------------------------ 2 CPD-28D2561 STIS/FUV ACCUM 0.2X0.2 E140M 1425 1 2600 S PHASE 0.98 TO 0.02 -MAMA see below (2110 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 | ------------------------------------------------------------------------------------------------------------------------------------ CPD-28D2561 1 STIS/CCD ACQ F28X50OI MIRROR none none none none 1 N/A I CPD-28D2561 2 STIS/FUV ACCUM 0.2X0.2 E140M 1425 none none none none 1 2110.0 S -MAMA 13629( 5) - 27-Mar-2014 12:39:22 - [ 5] Visit: 02 Visit Requirements: Period 73.41 D AND ZERO-PHASE HJD2454645.49; GROUP 02, 01, 03 WITHIN 73.4D On Hold Comments: Additional Comments: This exposure should be taken at phase=0.5 +- 0.02 We would prefer to have all data taken within the same 73d period and simultaneously with XMM if possible (i.e. either the 73.4d cycle in May-June or the 73.4d cycle in Nov-Dec 2014). 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 CPD-28D2561 STIS/CCD ACQ F28X50OII MIRROR 1 1 S (1 S) PHASE 0.48 TO 0.52 ------------------------------------------------------------------------------------------------------------------------------------ 2 CPD-28D2561 STIS/FUV ACCUM 0.2X0.2 E140M 1425 1 2600 S PHASE 0.48 TO 0.52 -MAMA see below (1850 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 | ------------------------------------------------------------------------------------------------------------------------------------ CPD-28D2561 1 STIS/CCD ACQ F28X50OI MIRROR none none none none 1 N/A I CPD-28D2561 2 STIS/FUV ACCUM 0.2X0.2 E140M 1425 none none none none 1 1850.0 S -MAMA 13629( 5) - 27-Mar-2014 12:39:22 - [ 6] Visit: 03 Visit Requirements: Period 73.41 D AND ZERO-PHASE HJD2454645.49; GROUP 03, 01, 02 WITHIN 73.4D On Hold Comments: Additional Comments: This exposure should be taken at phase=0.25 or 0.75 +- 0.02. We would prefer to have all data taken within the same 73d period and simultaneously with XMM if possible (i.e. either the 73.4d cycle in May-June or the 73.4d cycle in Nov-Dec 2014). 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 CPD-28D2561 STIS/CCD ACQ F28X50OII MIRROR 1 1 S (1 S) PHASE 0.23 TO 0.27 ------------------------------------------------------------------------------------------------------------------------------------ 2 CPD-28D2561 STIS/FUV ACCUM 0.2X0.2 E140M 1425 1 2600 S PHASE 0.23 TO 0.27 -MAMA see below (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 | ------------------------------------------------------------------------------------------------------------------------------------ CPD-28D2561 1 STIS/CCD ACQ F28X50OI MIRROR none none none none 1 N/A I CPD-28D2561 2 STIS/FUV ACCUM 0.2X0.2 E140M 1425 none none none none 1 2000.0 S -MAMA 13629( 5) - 27-Mar-2014 12:39:22 - [ 7] Summary Form for Proposal 13629 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures 0.2X0.2, F28X50OII ------------------------------------------------------------------------------------------------------------------------------------ Configurations STIS/CCD, STIS/FUV-MAMA ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACCUM, ACQ ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements GROUP 01, 02, 03 WITHIN 73.4D, GROUP 02, 01, 03 WITHIN 73.4D, GROUP 03, 01, 02 WITHIN 73.4D, PHASE 0.23 TO 0.27, PHASE 0.48 TO 0.52, PHASE 0.98 TO 0.02, Period 73.41 D AND ZERO-PHASE HJD2454645.49 ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements E140M, MIRROR ------------------------------------------------------------------------------------------------------------------------------------ Target Names CPD-28D2561 ------------------------------------------------------------------------------------------------------------------------------------