14048( 2) - 30-Jan-2015 18:48:14 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 14048 Version: 2 Check-in Time: 30-Jan-2015 18:48:14 STScI Edit Number: 0 Title Exploring the Dust-Gas Connection in the Protoplanetary Disk of GM Aur ------------------------------------------------------------------------------------ Type Cycle GO 22 ------------------------------------------------------------------------------------ Investigators Contact? PI: Dr. Catherine Espaillat Boston University Y CoI: Dr. Laura D. Ingleby Boston University N CoI: Dr. Jesus Hernandez Centro de Investigaciones de Astronomia N CoI: Dr. Nuria Calvet University of Michigan N ------------------------------------------------------------------------------------ Abstract Previous Spitzer infrared observations of disks around young, low-mass pre-main sequence stars have given us an unprecedented look at dust evolution in young objects, particularly in disks which were revealed to have large inner holes (i.e., the transitional disks). Despite this ground-breaking progress in studying the dust in young disks, the relationship between the dust and gas properties in the inner disk remains essentially unknown. Here we propose to quantify the variability of both the dust and gas in the transitional disk surrounding GM Aur to study how or if accretion onto the star is tied to inhomogeneities in the inner disk. To do this, we will use simultaneous Spitzer, HST, and Swift observations to constrain the IR, UV, and Xray emission of GM Aur and provide a picture of the interaction between dust and gas in the inner ~0.5-1 AU of the disk down to the stellar surface. ------------------------------------------------------------------------------------ Observations Description ------------------------ There will be 2 visits of the target GM Aur. The visits will be separated by approximately 1 week. MAMA FUV and NUV observations will be done using the G140L and G230L gratings which cover 1150-1730 A and 1570-3180 A. Simultaneous optical and near-IR spectra will be taken using the CCD G430L grating (2900-5700 A) and the CCD G750L grating (5240-10270 A). We will also do fringe-flats to correct the spectra beyond 7000 A. We note that since this is a variability study we will need to use the STIS MAMA and the CCD in the same visit and since the CCD observations will take about 30 minutes, this visit structure is allowed according to the HST primer. --------- Additional Comments ---------- These visits will be simultaneous to Spitzer observations of GM Aur. Spitzer and HST visibility windows overlap between January 5 and January 10, 2016. We request that GM Aur be observed at the beginning of the window (January 5) for visit 1 and the end of this window (January 10) for visit 2 to allow for the greatest time span between the two epochs. This request has been specified using the timing requirements for each epoch. GM Aur is flagged as a health/safety concern by the BOT for the NUV G230L exposure. GM Aur has been observed with the G230L grating on 5 separate 14048( 2) - 30-Jan-2015 18:48:14 - [ 2] occasions and has not exceeded the brightness limit. We know the spectral type of GM Aur is ~K4-K5, not O5 as assumed by the BOT. ------------------------------------------------------------------------------------ 14048( 2) - 30-Jan-2015 18:48:14 - [ 3] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 V-GM-AUR STAR, CIRCUMSTELLAR RA=04H55M10.9800S, J2000 V = 13.1 MATTER, PRE-MAIN DEC=+30D21'59.40" SEQUENCE STAR, T TAURI STAR Reference Frame: ICRS ------------------------------------------------------------------------------------------------------------------------------------ 14048( 2) - 30-Jan-2015 18:48:14 - [ 4] Visit: 01 Visit Requirements: BETWEEN 05-JAN-2016:00:00:00 AND 06-JAN-2016:00:00:00 On Hold Comments: Additional Comments: This visit should be simultaneous with Spitzer observations. 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 V-GM-AUR STIS/CCD ACQ F28X50LP MIRROR 1 0.5 S (0.5 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 V-GM-AUR STIS/CCD ACCUM 52X2 G430L 4300 CR-SPLIT=2 1 35 S (35 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 V-GM-AUR STIS/CCD ACCUM 52X2 G750L 7751 CR-SPLIT=2 1 8 S (8 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 CCDFLAT STIS/CCD ACCUM 0.3X0.09 G750L 7751 2 DEF (0 S) ------------------------------------------------------------------------------------------------------------------------------------ 5 V-GM-AUR STIS/NUV ACCUM 52X2 G230L 2376 1 1207 S -MAMA (1207 S) ------------------------------------------------------------------------------------------------------------------------------------ 6 V-GM-AUR STIS/FUV ACCUM 52X2 G140L 1425 1 2967 S -MAMA (2967 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 | ------------------------------------------------------------------------------------------------------------------------------------ V-GM-AUR 1 STIS/CCD ACQ F28X50LP MIRROR none none none none 1 N/A V-GM-AUR 2 STIS/CCD ACCUM 52X2 G430L 4300 none none none 1 1 N/A V-GM-AUR 2 STIS/CCD ACCUM 52X2 G430L 4300 none none none 2 1 N/A V-GM-AUR 3 STIS/CCD ACCUM 52X2 G750L 7751 none none none 1 1 N/A V-GM-AUR 3 STIS/CCD ACCUM 52X2 G750L 7751 none none none 2 1 N/A CCDFLAT 4 STIS/CCD ACCUM 0.3X0.09 G750L 7751 none none 1 none 1 N/A CCDFLAT 4 STIS/CCD ACCUM 0.3X0.09 G750L 7751 none none 2 none 1 N/A V-GM-AUR 5 STIS/NUV ACCUM 52X2 G230L 2376 none none none none 1 N/A -MAMA V-GM-AUR 6 STIS/FUV ACCUM 52X2 G140L 1425 none none none none 2 N/A -MAMA 14048( 2) - 30-Jan-2015 18:48:14 - [ 5] Visit: 02 Visit Requirements: BETWEEN 09-JAN-2016:00:00:00 AND 10-JAN-2016:00:00:00 On Hold Comments: Additional Comments: This visit should be simultaneous with Spitzer observations. 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 V-GM-AUR STIS/CCD ACQ F28X50LP MIRROR 1 0.5 S (0.5 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 V-GM-AUR STIS/CCD ACCUM 52X2 G430L 4300 CR-SPLIT=2 1 35 S (35 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 V-GM-AUR STIS/CCD ACCUM 52X2 G750L 7751 CR-SPLIT=2 1 8 S (8 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 CCDFLAT STIS/CCD ACCUM 0.3X0.09 G750L 7751 2 DEF (0 S) ------------------------------------------------------------------------------------------------------------------------------------ 5 V-GM-AUR STIS/NUV ACCUM 52X2 G230L 2376 1 1231 S -MAMA see below (1207 S) ------------------------------------------------------------------------------------------------------------------------------------ 6 V-GM-AUR STIS/FUV ACCUM 52X2 G140L 1425 1 2967 S -MAMA (2967 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 | ------------------------------------------------------------------------------------------------------------------------------------ V-GM-AUR 1 STIS/CCD ACQ F28X50LP MIRROR none none none none 1 N/A V-GM-AUR 2 STIS/CCD ACCUM 52X2 G430L 4300 none none none 1 1 N/A V-GM-AUR 2 STIS/CCD ACCUM 52X2 G430L 4300 none none none 2 1 N/A V-GM-AUR 3 STIS/CCD ACCUM 52X2 G750L 7751 none none none 1 1 N/A V-GM-AUR 3 STIS/CCD ACCUM 52X2 G750L 7751 none none none 2 1 N/A CCDFLAT 4 STIS/CCD ACCUM 0.3X0.09 G750L 7751 none none 1 none 1 N/A CCDFLAT 4 STIS/CCD ACCUM 0.3X0.09 G750L 7751 none none 2 none 1 N/A V-GM-AUR 5 STIS/NUV ACCUM 52X2 G230L 2376 none none none none 1 1207.0 S -MAMA V-GM-AUR 6 STIS/FUV ACCUM 52X2 G140L 1425 none none none none 2 N/A -MAMA 14048( 2) - 30-Jan-2015 18:48:14 - [ 6] Summary Form for Proposal 14048 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures 0.3X0.09, 52X2, F28X50LP ------------------------------------------------------------------------------------------------------------------------------------ Configurations STIS/CCD, STIS/FUV-MAMA, STIS/NUV-MAMA ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACCUM, ACQ ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters CR-SPLIT=2 ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements BETWEEN 05-JAN-2016:00:00:00 AND 06-JAN-2016:00:00:00, BETWEEN 09-JAN-2016:00:00:00 AND 10-JAN-2016:00:00:00 ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements G140L, G230L, G430L, G750L, MIRROR ------------------------------------------------------------------------------------------------------------------------------------ Target Names CCDFLAT, V-GM-AUR ------------------------------------------------------------------------------------------------------------------------------------