12599( 2) - 05-Jul-2011 18:12:38 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 12599 Version: 2 Check-in Time: 05-Jul-2011 18:12:38 STScI Edit Number: 0 Title The Light Echoes around V838 Monocerotis ------------------------------------------------------------------------------------ Type Cycle GO 19 ------------------------------------------------------------------------------------ Investigators Contact? PI: Dr. Howard E. Bond Space Telescope Science Institute CoI: Dr. Romano L.M. Corradi Instituto de Astrofisica de Canarias N 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: Prof. 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, and the results showed that V838 Mon had a maximum luminosity brighter than a classical nova. Because of the extreme rarity of light echoes, this is almost certainly the only opportunity to achieve such results during the lifetime of HST. Similar intermediate-luminosity red transients are now being discovered in nearby galaxies, and it has become important to understand the physics of their outbursts and the nature of their progenitors. We propose one visit during Cycle 19, using ACS, in order to continue the mapping of the circumstellar dust and to accomplish the other goals listed above. ------------------------------------------------------------------------------------ Observations Description ------------------------ 12599( 2) - 05-Jul-2011 18:12:38 - [ 2] This program contains one 6-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 6 exposures at each of the 3 points. The observation should be done near the end of Cycle 19. Real Time Justification ----------------------- Calibration Justification ------------------------- Additional Comments ------------------- ------------------------------------------------------------------------------------ 12599( 2) - 05-Jul-2011 18:12:38 - [ 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. ------------------------------------------------------------------------------------------------------------------------------------ 12599( 2) - 05-Jul-2011 18:12:38 - [ 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 ------------------------------------------------------------------------------------------------------------------------------------ 12599( 2) - 05-Jul-2011 18:12:38 - [ 5] Visit: 01 Visit Requirements: PCS MODE FINE; SCHED 40%; BETWEEN 01-AUG-2012 AND 30-SEP-2012 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 6 750 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 1 784.0 S V838-MON-ECHO-COPY 1 ACS/WFC ACCUM WFCENTER F814W 1 none 2 none 1 784.0 S V838-MON-ECHO-COPY 1 ACS/WFC ACCUM WFCENTER F814W 1 none 3 none 1 784.0 S V838-MON-ECHO-COPY 1 ACS/WFC ACCUM WFCENTER F814W 1 none 4 none 2 848.0 S V838-MON-ECHO-COPY 1 ACS/WFC ACCUM WFCENTER F814W 1 none 5 none 2 848.0 S V838-MON-ECHO-COPY 1 ACS/WFC ACCUM WFCENTER F814W 1 none 6 none 2 848.0 S V838-MON-ECHO-COPY 1 ACS/WFC ACCUM WFCENTER F814W 2 none 1 none 3 848.0 S V838-MON-ECHO-COPY 1 ACS/WFC ACCUM WFCENTER F814W 2 none 2 none 3 848.0 S V838-MON-ECHO-COPY 1 ACS/WFC ACCUM WFCENTER F814W 2 none 3 none 3 848.0 S V838-MON-ECHO-COPY 1 ACS/WFC ACCUM WFCENTER F814W 2 none 4 none 4 848.0 S V838-MON-ECHO-COPY 1 ACS/WFC ACCUM WFCENTER F814W 2 none 5 none 4 848.0 S V838-MON-ECHO-COPY 1 ACS/WFC ACCUM WFCENTER F814W 2 none 6 none 4 848.0 S V838-MON-ECHO-COPY 1 ACS/WFC ACCUM WFCENTER F814W 3 none 1 none 5 848.0 S V838-MON-ECHO-COPY 1 ACS/WFC ACCUM WFCENTER F814W 3 none 2 none 5 848.0 S V838-MON-ECHO-COPY 1 ACS/WFC ACCUM WFCENTER F814W 3 none 3 none 5 848.0 S V838-MON-ECHO-COPY 1 ACS/WFC ACCUM WFCENTER F814W 3 none 4 none 6 848.0 S V838-MON-ECHO-COPY 1 ACS/WFC ACCUM WFCENTER F814W 3 none 5 none 6 848.0 S V838-MON-ECHO-COPY 1 ACS/WFC ACCUM WFCENTER F814W 3 none 6 none 6 848.0 S 12599( 2) - 05-Jul-2011 18:12:38 - [ 6] Summary Form for Proposal 12599 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures WFCENTER ------------------------------------------------------------------------------------------------------------------------------------ Configurations ACS/WFC ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACCUM ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters CR-SPLIT=NO ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements BETWEEN 01-AUG-2012 AND 30-SEP-2012, PATTERN 1 1, PCS MODE FINE, SCHED 40% ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F814W ------------------------------------------------------------------------------------------------------------------------------------ Target Names V838-MON-ECHO-COPY ------------------------------------------------------------------------------------------------------------------------------------