! Hubble Space Telescope Cycle 5 (1995) Phase II Proposal Template ! $Id: 6086,v 9.1 1996/03/25 14:25:19 pepsa Exp $ ! ! Refer to the HST Phase II Proposal Instructions to fill this out ! ! Anything after a "!" is ignored, and may be deleted ! ! All keywords with multiple entries are comma delimited except the ! Visit_Requirements and Special_Requirements keywords which can be ! delimited with carriage returns or semi-colons, but not commas ! ! For help call your Program Coordinator: Dustin Manning ! Phone: 410 338-4456 , E-mail: manning@stsci.edu ! ! This partially completed template was generated from a Phase I proposal. ! Date generated: Sun Dec 18 19:23:47 EST 1994 ! Proposal_Information ! Section 4 Title: Searching for Flaring Activity on the Be star Gamma Cas Proposal_Category: GO Scientific_Category: Hot Stars Cycle: 5 Investigators PI_name: Dr. Myron Smith PI_Institution: Computer Sciences Corporation CoI_Name: Richard D. Robinson CoI_Institution: Computer Science Corporation Contact: ! Y or N (designate at most one contact) CoI_Name: Kenneth Carpenter CoI_Institution: NASA/GSFC/LASP Contact: ! Y or N (designate at most one contact) Abstract: ! Free format text (please update) Gamma Cas is one of the most active of the classical Be stars, showing pronounced optical emission lines as well as variable optical, UV and X-ray continua. The X-ray variability is often assumed to be caused by the interaction of the stellar wind with a hypothetical degenerate companion. Recent evidence, however, suggests that the X-rays may be generated by flare- like activity originating in localized regions on the surface of the star (Smith, 1995). This interpretation is based on a variety of evidence, including FUV continuum variations observed with Voyager and transient emission and absorption features in various optical spectral lines seen from the ground. The observations are far from conclusive, however. In the proposed observations we will use the GHRS to obtain high quality UV spectral time sequences, which will allow us to test the flare/active region hypothesis. Flares are commonly assumed to be related to magnetic energy releases. If flares and active regions are proven to exist on Be stars, it will have a dramatic influence on the theoretical interpretation of the Be phenomena. Questions ! Free format text (please update) Observing_Description: We will use the GHRS in rapid readout mode to take UV spectral time sequences of the B0.5e IV star Gamma Cas. The observations will be taken with the G160M grating through the LSA to ensure accurate spectrophotometry. The data will cover a 34 Angstrom\ spectral range centered at 1400 Angstrom\ and will contain the Si IV resonance doublet as well as a good samples of the FUV continuum. With this configuration a spectral resolution of about 26 km s^-1 is expected. This is comparable to the narrowest features observed in the optical profiles and substantially narrower than the average fine structure. Therefore it should be sufficient for our purposes. Using existing IUE spectra we estimate that the continuum will have a count rate of approximately 2000 counts diode^-1 s^-1. We hope to obtain data with a 1s time resolution, allowing us to study the most rapidly varying phenomena. High time resolution data will help in differentiating the various possible emission processes. In most cases the data will be integrated by as much as 60s, giving spectra with S/N in excess of 300:1 and allowing a detailed examination of the profile fine-structure and its evolution. Since we are interested in variations from the mean rather than the absolute flux, the pronounced (but stable) fixed pattern noise of the GHRS in rapid readout mode should cause no difficulty in the analysis. The requested 14 orbits would cover one complete rotation cycle of the star. This will allow us to follow features across the stellar surface as well as determine the number of activity centers which are present. It will also give us a large enough sample to allow a statistical evaluation of the flaring phenomena, if found. Real_Time_Justification: We will require scheduling of these observations in coordination with X-ray satellite programs. Ground-based observations will also be requested for time driven by the HST schedule. Coordinated ground-based monitoring in the US, Japan (Hirata), and India (Anandarao) will be used to verify that the fine-structure in the Si IV lines is equivalent to that previously seen in the optical line profiles. In a previous campaign with the EUVE satellite we were successful in observing rapid optical activity from a Japanese observatory exactly when EUV flux variations were being monitored. The different temperature responses of the lines will also help in differentiating between flare-like phenomena and non- radial pulsations. We will also attempt to obtain coordinated X-ray monitoring of the star with the X-ray Timing Explorer (XTE). Simultaneous FUV/X-ray observations should allow us to conclusively differentiate between the flare and X-ray binary hypothesis for the origin of the X-ray flux. Calibration_Justification: ! Move appropriate text from Real_Time_Justification Additional_Comments: Fixed_Targets ! Section 5.1 Target_Number: 1 Target_Name: HD5394 Alternate_Names: GAMMA-CAS, GSC4017-02319 Description: STAR, BE, IRREGULAR VARIABLE Position: RA=0H 56M 42.52S +/- .05S , DEC=60D 43' 00.3" +/- 0.5" Equinox: J2000 Epoch: 2000 Annual_Parallax: 0 Flux: V=2.28, TYPE=B0IVe, B-V=-0.15, F(1390)=1.3e-8 Comments: Coordinates are from Hipparcos INCA Visits Visit_Number: 1 Visit_Requirements: CVZ On_Hold_Comments: Visit_Comments: Exposure_Number: 10 ! Section 6.5 Target_Name: HD5394 Config: HRS Opmode: ACQ Aperture: 2.0 Sp_Element: MIRROR-A2 Wavelength: Optional_Parameters: SEARCH-SIZE=5,SAA-CONTOUR=HIGH-NOISE Number_of_Iterations: 1 Time_Per_Exposure: 5s Special_Requirements: ONBOARD ACQ FOR 20 Exposure_Number: 20 Target_Name: HD5394 Config: HRS Opmode: ACQ/PEAKUP Aperture: 2.0 Sp_Element: MIRROR-A2 Wavelength: Optional_Parameters: SAA-CONTOUR=HIGH-NOISE Number_of_Iterations: 1 Time_Per_Exposure: 20.4S Special_Requirements: ONBOARD ACQ FOR 30-310 Exposure_Number: 30 Target_Name: HD5394 Config: HRS Opmode: ACCUM Aperture: 2.0 Sp_Element: G160M Wavelength: 1399.0 Optional_Parameters: FP-SPLIT=FOUR, STEP-PATT=5,SAA-CONTOUR=HIGH-NOISE Number_of_Iterations: 1 Time_Per_Exposure: 652.8S Exposure_Number: 40 Target_Name: WAVE Config: HRS Opmode: ACCUM Aperture: SC2 Sp_Element: G160M Wavelength: 1399.0 Optional_Parameters: STEP-PATT=3,SAA-CONTOUR=HIGH-NOISE Number_of_Iterations: 1 Time_Per_Exposure: 32S Exposure_Number: 50 Target_Name: HD5394 Config: HRS Opmode: RAPID Aperture: 2.0 Sp_Element: G160M Wavelength: 1399.0 Optional_Parameters: SAMPLE-TIME=1.0 , SAA-CONTOUR=HIGH-NOISE Number_of_Iterations: 1 Time_Per_Exposure: 90M Exposure_Number: 60 Target_Name: WAVE Config: HRS Opmode: ACCUM Aperture: SC2 Sp_Element: G160M Wavelength: 1399.0 Optional_Parameters: STEP-PATT=3,SAA-CONTOUR=HIGH-NOISE Number_of_Iterations: 1 Time_Per_Exposure: 32S Exposure_Number: 70 Target_Name: HD5394 Config: HRS Opmode: RAPID Aperture: 2.0 Sp_Element: G160M Wavelength: 1399.0 Optional_Parameters: SAMPLE-TIME=1.0 , SAA-CONTOUR=HIGH-NOISE Number_of_Iterations: 1 Time_Per_Exposure: 90M Exposure_Number: 80 Target_Name: WAVE Config: HRS Opmode: ACCUM Aperture: SC2 Sp_Element: G160M Wavelength: 1399.0 Optional_Parameters: STEP-PATT=3,SAA-CONTOUR=HIGH-NOISE Number_of_Iterations: 1 Time_Per_Exposure: 32S Exposure_Number: 90 Target_Name: HD5394 Config: HRS Opmode: RAPID Aperture: 2.0 Sp_Element: G160M Wavelength: 1399.0 Optional_Parameters: SAMPLE-TIME=1.0 , SAA-CONTOUR=HIGH-NOISE Number_of_Iterations: 1 Time_Per_Exposure: 90M Exposure_Number: 100 Target_Name: WAVE Config: HRS Opmode: ACCUM Aperture: SC2 Sp_Element: G160M Wavelength: 1399.0 Optional_Parameters: STEP-PATT=3,SAA-CONTOUR=HIGH-NOISE Number_of_Iterations: 1 Time_Per_Exposure: 32S Exposure_Number: 110 Target_Name: HD5394 Config: HRS Opmode: RAPID Aperture: 2.0 Sp_Element: G160M Wavelength: 1399.0 Optional_Parameters: SAMPLE-TIME=1.0 , SAA-CONTOUR=HIGH-NOISE Number_of_Iterations: 1 Time_Per_Exposure: 90M Exposure_Number: 120 Target_Name: WAVE Config: HRS Opmode: ACCUM Aperture: SC2 Sp_Element: G160M Wavelength: 1399.0 Optional_Parameters: STEP-PATT=3,SAA-CONTOUR=HIGH-NOISE Number_of_Iterations: 1 Time_Per_Exposure: 32S Exposure_Number: 130 Target_Name: HD5394 Config: HRS Opmode: RAPID Aperture: 2.0 Sp_Element: G160M Wavelength: 1399.0 Optional_Parameters: SAMPLE-TIME=1.0 , SAA-CONTOUR=HIGH-NOISE Number_of_Iterations: 1 Time_Per_Exposure: 90M Exposure_Number: 140 Target_Name: WAVE Config: HRS Opmode: ACCUM Aperture: SC2 Sp_Element: G160M Wavelength: 1399.0 Optional_Parameters: STEP-PATT=3,SAA-CONTOUR=HIGH-NOISE Number_of_Iterations: 1 Time_Per_Exposure: 32S Exposure_Number: 150 Target_Name: HD5394 Config: HRS Opmode: RAPID Aperture: 2.0 Sp_Element: G160M Wavelength: 1399.0 Optional_Parameters: SAMPLE-TIME=1.0 , SAA-CONTOUR=HIGH-NOISE Number_of_Iterations: 1 Time_Per_Exposure: 90M Exposure_Number: 160 Target_Name: WAVE Config: HRS Opmode: ACCUM Aperture: SC2 Sp_Element: G160M Wavelength: 1399.0 Optional_Parameters: STEP-PATT=3,SAA-CONTOUR=HIGH-NOISE Number_of_Iterations: 1 Time_Per_Exposure: 32S Exposure_Number: 170 Target_Name: HD5394 Config: HRS Opmode: RAPID Aperture: 2.0 Sp_Element: G160M Wavelength: 1399.0 Optional_Parameters: SAMPLE-TIME=1.0 , SAA-CONTOUR=HIGH-NOISE Number_of_Iterations: 1 Time_Per_Exposure: 90M Exposure_Number: 180 Target_Name: WAVE Config: HRS Opmode: ACCUM Aperture: SC2 Sp_Element: G160M Wavelength: 1399.0 Optional_Parameters: STEP-PATT=3,SAA-CONTOUR=HIGH-NOISE Number_of_Iterations: 1 Time_Per_Exposure: 32S Exposure_Number: 190 Target_Name: HD5394 Config: HRS Opmode: RAPID Aperture: 2.0 Sp_Element: G160M Wavelength: 1399.0 Optional_Parameters: SAMPLE-TIME=1.0 , SAA-CONTOUR=HIGH-NOISE Number_of_Iterations: 1 Time_Per_Exposure: 90M Exposure_Number: 200 Target_Name: WAVE Config: HRS Opmode: ACCUM Aperture: SC2 Sp_Element: G160M Wavelength: 1399.0 Optional_Parameters: STEP-PATT=3,SAA-CONTOUR=HIGH-NOISE Number_of_Iterations: 1 Time_Per_Exposure: 32S Exposure_Number: 210 Target_Name: HD5394 Config: HRS Opmode: RAPID Aperture: 2.0 Sp_Element: G160M Wavelength: 1399.0 Optional_Parameters: SAMPLE-TIME=1.0 , SAA-CONTOUR=HIGH-NOISE Number_of_Iterations: 1 Time_Per_Exposure: 68M Exposure_Number: 220 Target_Name: WAVE Config: HRS Opmode: ACCUM Aperture: SC2 Sp_Element: G160M Wavelength: 1399.0 Optional_Parameters: STEP-PATT=3,SAA-CONTOUR=HIGH-NOISE Number_of_Iterations: 1 Time_Per_Exposure: 32S Exposure_Number: 230 Target_Name: HD5394 Config: HRS Opmode: RAPID Aperture: 2.0 Sp_Element: G160M Wavelength: 1399.0 Optional_Parameters: SAMPLE-TIME=1.0 , SAA-CONTOUR=HIGH-NOISE Number_of_Iterations: 1 Time_Per_Exposure: 65M Exposure_Number: 240 Target_Name: WAVE Config: HRS Opmode: ACCUM Aperture: SC2 Sp_Element: G160M Wavelength: 1399.0 Optional_Parameters: STEP-PATT=3,SAA-CONTOUR=HIGH-NOISE Number_of_Iterations: 1 Time_Per_Exposure: 32S Exposure_Number: 250 Target_Name: HD5394 Config: HRS Opmode: RAPID Aperture: 2.0 Sp_Element: G160M Wavelength: 1399.0 Optional_Parameters: SAMPLE-TIME=1.0 , SAA-CONTOUR=HIGH-NOISE Number_of_Iterations: 1 Time_Per_Exposure: 65M Exposure_Number: 260 Target_Name: WAVE Config: HRS Opmode: ACCUM Aperture: SC2 Sp_Element: G160M Wavelength: 1399.0 Optional_Parameters: STEP-PATT=3,SAA-CONTOUR=HIGH-NOISE Number_of_Iterations: 1 Time_Per_Exposure: 32S Exposure_Number: 270 Target_Name: HD5394 Config: HRS Opmode: RAPID Aperture: 2.0 Sp_Element: G160M Wavelength: 1399.0 Optional_Parameters: SAMPLE-TIME=1.0 , SAA-CONTOUR=HIGH-NOISE Number_of_Iterations: 1 Time_Per_Exposure: 65M Exposure_Number: 280 Target_Name: WAVE Config: HRS Opmode: ACCUM Aperture: SC2 Sp_Element: G160M Wavelength: 1399.0 Optional_Parameters: STEP-PATT=3,SAA-CONTOUR=HIGH-NOISE Number_of_Iterations: 1 Time_Per_Exposure: 32S Exposure_Number: 290 Target_Name: HD5394 Config: HRS Opmode: RAPID Aperture: 2.0 Sp_Element: G160M Wavelength: 1399.0 Optional_Parameters: SAMPLE-TIME=1.0 , SAA-CONTOUR=HIGH-NOISE Number_of_Iterations: 1 Time_Per_Exposure: 49M Exposure_Number: 300 Target_Name: WAVE Config: HRS Opmode: ACCUM Aperture: SC2 Sp_Element: G160M Wavelength: 1399.0 Optional_Parameters: STEP-PATT=3,SAA-CONTOUR=HIGH-NOISE Number_of_Iterations: 1 Time_Per_Exposure: 32S Exposure_Number: 310 Target_Name: HD5394 Config: HRS Opmode: ACCUM Aperture: 2.0 Sp_Element: G160M Wavelength: 1399.0 Optional_Parameters: FP-SPLIT=FOUR, STEP-PATT=5,SAA-CONTOUR=HIGH-NOISE Number_of_Iterations: 1 Time_Per_Exposure: 652.8S Special_Requirements: Comments: Data_Distribution ! Defaults indicated; change if desired Medium: 8MM ! 8MM or 6250BPI or 1600BPI Blocking_Factor: 10 ! 10 or 1 ! Only astronomers with very old 9- ! track tape drives should consider ! a blocking factor of 1 Ship_To: Richard Robinson Code 681/CSC Goddard Space Flight Center Greenbelt, MD 20771 ! ! Ship_Via: UPS ! UPS (2-day) or OVERNIGHT ! Overnight shipping done at PI expense Recipient_Email: ! Needed if Ship_To: is not PI_Address ! ! Let us know what you think of this template and software! ! Please send a list of your likes and dislikes to your Program Coordinator