12297( 2) - 12-Jul-2010 14:18:22 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 12297 Version: 2 Check-in Time: 12-Jul-2010 14:18:22 STScI Edit Number: 0 Title The Light Echoes around V838 Monocerotis ------------------------------------------------------------------------------------ Type Cycle GO 18 ------------------------------------------------------------------------------------ Investigators Contact? PI: Dr. Howard E. Bond Space Telescope Science Institute CoI: Dr. Romano Corradi Isaac Newton Group, Observatorio del Roque N de los Muchachos CoI: Dr. Lisa A. Crause South African Astronomical Observatory N CoI: Prof. Michael A. Dopita Australian National University N CoI: Dr. Arne A. Henden American Association Of Variable Star N Observers CoI: Dr. Zoltan Levay Space Telescope Science Institute N CoI: Dr. Ulisse Munari Universita di Padova N CoI: Dr. Nino Panagia Space Telescope Science Institute N CoI: Dr. William B. Sparks Space Telescope Science Institute N CoI: Dr. Sumner G. Starrfield Arizona State University N CoI: Dr. Ben E. Sugerman Goucher College N CoI: Dr. R. Mark Wagner University of Arizona N CoI: Dr. Richard L. White Space Telescope Science Institute N ------------------------------------------------------------------------------------ Abstract V838 Monocerotis, which burst upon the astronomical scene in early 2002, is a completely unanticipated new object. It underwent a large-amplitude and very luminous outburst, during which its spectrum remained that of an extremely cool supergiant. A rapidly evolving set of light echoes around V838 Mon was discovered soon after the outburst, and quickly became the most spectacular display of the phenomenon yet seen. These light echoes provide the means to accomplish three unique types of measurements based on continued HST imaging during the event: (1) Study effects of MHD turbulence at high resolution and in 3 dimensions; (2) Construct the first unambiguous and fully 3-D map of a circumstellar dust envelope in the Milky Way; (3) Study dust physics in a unique setting where the spectrum and light curve of the illumination, and the scattering angle, are unambiguously known. We have also used our HST data to determine the distance to V838 Mon through a novel direct geometric technique. Because of the extreme rarity of light echoes, this is almost certainly the only opportunity to achieve such results during the lifetime of HST. We propose one visit during Cycle 18, using ACS, in order to continue the mapping of the circumstellar dust and to accomplish the other goals listed above. ------------------------------------------------------------------------------------ Observations Description ------------------------ This program contains one 5-orbit visit for imaging of the light echo around V838 Mon with the ACS/WFC. Images will be taken in I (F814W). We will use a 3-point dither to remove the gap between the chips, with 5 exposures at each of 12297( 2) - 12-Jul-2010 14:18:22 - [ 2] the 3 points. Real Time Justification ----------------------- Calibration Justification ------------------------- Additional Comments ------------------- ------------------------------------------------------------------------------------ 12297( 2) - 12-Jul-2010 14:18:22 - [ 3] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 V838-MON-ECH ISM, EJECTA, PLANETARY RA=07H04M5.8200S +/- 0.1", J2000 V = 15.5 O-COPY NEBULA, REFLECTION DEC=-03D50'40.00" +/- 0.1" NEBULA, WIND Reference Frame: ICRS Comments: Geometric center of light echo, based on data from Cycle 14. 6/14/06: updated to ICRS reference frame, using galex website. ------------------------------------------------------------------------------------------------------------------------------------ 12297( 2) - 12-Jul-2010 14:18:22 - [ 4] Patterns ------------------------------------------------------------------------------------------------------------------------------------ Pattern_Number: 1 Primary_Pattern Secondary_Pattern Pattern_Type ACS-WFC-DITHER-LINE Pattern_Purpose DITHER Number_Of_Points 3 Point_Spacing 3.011 Line_Spacing Coordinate_Frame POS-TARG Pattern_Orient 85.28 Angle_Between_Sides Center_Pattern YES ------------------------------------------------------------------------------------------------------------------------------------ 12297( 2) - 12-Jul-2010 14:18:22 - [ 5] Visit: 01 Visit Requirements: PCS MODE FINE; SCHED 30%; BETWEEN 25-JAN-2011:00:00:00 AND 25-FEB-2011:00:00:00 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| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 V838-MON-EC ACS/WFC ACCUM WFCENTER F814W CR-SPLIT=NO 5 750 S PATTERN 1 1 HO-COPY see below ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ V838-MON-ECHO-COPY 1 ACS/WFC ACCUM WFCENTER F814W 1 none 1 none 1 801.0 S V838-MON-ECHO-COPY 1 ACS/WFC ACCUM WFCENTER F814W 1 none 2 none 1 801.0 S V838-MON-ECHO-COPY 1 ACS/WFC ACCUM WFCENTER F814W 1 none 3 none 1 801.0 S V838-MON-ECHO-COPY 1 ACS/WFC ACCUM WFCENTER F814W 1 none 4 none 2 858.0 S V838-MON-ECHO-COPY 1 ACS/WFC ACCUM WFCENTER F814W 1 none 5 none 2 858.0 S V838-MON-ECHO-COPY 1 ACS/WFC ACCUM WFCENTER F814W 2 none 1 none 2 858.0 S V838-MON-ECHO-COPY 1 ACS/WFC ACCUM WFCENTER F814W 2 none 2 none 3 866.0 S V838-MON-ECHO-COPY 1 ACS/WFC ACCUM WFCENTER F814W 2 none 3 none 3 866.0 S V838-MON-ECHO-COPY 1 ACS/WFC ACCUM WFCENTER F814W 2 none 4 none 3 866.0 S V838-MON-ECHO-COPY 1 ACS/WFC ACCUM WFCENTER F814W 2 none 5 none 4 858.0 S V838-MON-ECHO-COPY 1 ACS/WFC ACCUM WFCENTER F814W 3 none 1 none 4 858.0 S V838-MON-ECHO-COPY 1 ACS/WFC ACCUM WFCENTER F814W 3 none 2 none 4 858.0 S V838-MON-ECHO-COPY 1 ACS/WFC ACCUM WFCENTER F814W 3 none 3 none 5 866.0 S V838-MON-ECHO-COPY 1 ACS/WFC ACCUM WFCENTER F814W 3 none 4 none 5 866.0 S V838-MON-ECHO-COPY 1 ACS/WFC ACCUM WFCENTER F814W 3 none 5 none 5 866.0 S 12297( 2) - 12-Jul-2010 14:18:22 - [ 6] Summary Form for Proposal 12297 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures WFCENTER ------------------------------------------------------------------------------------------------------------------------------------ Configurations ACS/WFC ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACCUM ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters CR-SPLIT=NO ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements BETWEEN 25-JAN-2011:00:00:00 AND 25-FEB-2011:00:00:00, PATTERN 1 1, PCS MODE FINE, SCHED 30% ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F814W ------------------------------------------------------------------------------------------------------------------------------------ Target Names V838-MON-ECHO-COPY ------------------------------------------------------------------------------------------------------------------------------------