14601( 2) - 18-Jul-2016 16:10:48 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 14601 Version: 2 Check-in Time: 18-Jul-2016 16:10:48 STScI Edit Number: 0 Title The Energetically Complete Picture of a Starburst Superwind ------------------------------------------------------------------------------------ Type Cycle GO 24 ------------------------------------------------------------------------------------ Investigators Contact? PI: Prof. Matthew James Hayes Stockholm University Y CoI: Prof. Goeran Oestlin Stockholm University N CoI: Dr. Jens Melinder Stockholm University N CoI: Prof. Claudia Scarlata University of Minnesota - Twin Cities N CoI: Dr. Matthew D. Lehnert CNRS, Institut d'Astrophysique de Paris N ------------------------------------------------------------------------------------ Abstract Recent Cycle 22 observations, with both ACS and COS, have revealed a halo of OVI emission surrounding a low-redshift, compact star-forming galaxy. This is the first time that the coronal gas phase, with the illusive temperature of T~300, 000 K, has been mapped in emission for an individual galaxy. The implications of this are profound, in that this gas may represent the hitherto unobservable temperature regime through which galaxy superwinds can radiate energy. These unique observations enable us measure a large number of properties of the warm outflow, but the global properties of the wind in all other gas phases remain illusive because few suitable metal lines are available in the existing COS/G130M spectrum. We propose to obtain COS spectroscopy in the redder G160M setting to measure the absorption features of 10 more interstellar lines. From this we will build a picture of the velocity structure of the outflow in the colder atomic phases that are likely to contain the bulk of the mass. This will provide the complete energetic picture of the outflow, including warm/coronal and colder/atomic phases for the first time. A further G130M spectrum positioned in the halo will determine the properties (flux and kinematics) of a peculiar 'blob' of enhanced OVI emission. This region is as bright in OVI as the central pointing, but is located 10 optical scale lengths from the center, with no obvious cospatial source of excitation. Kinematics derived from this observation will determine its physical origin. ------------------------------------------------------------------------------------ Observations Description ------------------------ This programme will obtain spectra with COS of a single galaxy that hosts an extreme starburst. The object has a very luminous compact central object, with a diffuse gaseous halo. We will obtain: A. COS/G160M spectroscopy on the central pointing (2 orbits) B. G130M spectroscopy in the halo, offset by {ra, dec} = {-1.86, 2.13} arcsec (2 orbits) The four orbit allocation will be executed in one visit. 14601( 2) - 18-Jul-2016 16:10:48 - [ 2] We will use the PSA, ACQ/IMAGE, and MIRROR A. The acquisition is a copy of that used in GO 13656, which obtained COS specroscopy (G130M) on the central poiting. After this initial acquisition we will obtain the G160M spectrum of the central pointing (part A. above) We will then perform an offset to a pointing in the halo, re-image the galaxy in the NUV, change grating to G130M, and execute part B. Acquisition time is 13 seconds for SNR=40 assuming a point-source. In part A we use G160M, CENWAVE=1600, TIME-TAG, and all FP positions In part B we use G130M, CENWAVE=1318, TIME-TAG, and all FP positions Each individual specturm is roughly half an orbit. ------------------------------------------------------------------------------------ 14601( 2) - 18-Jul-2016 16:10:48 - [ 3] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 SDSSJ1156+50 GALAXY, DWARF COMPACT, RA=11H56M30.6305S +/- 0.3", J2000 V = 18.6 +/- 0.1 FUV magnitude 18.8 AB 08--CLUSTER NUCLEUS, STARBURST DEC=+50D08'22.18" +/- 0.3" Reference Frame: ICRS Extended: NO Comments: These target data are copied from GO 13656, which successfully observed the galaxy with COS. ------------------------------------------------------------------------------------------------------------------------------------ 2 SDSSJ1156+50 GALAXY, HALO, STAR RA=11H56M30.4373S +/- 0.3", J2000 V = 18.6 +/- 0.1 FUV magnitude 18.8 AB 08--HALO FORMING REGION DEC=+50D08'24.31" +/- 0.3" Reference Frame: ICRS Extended: YES Comments: These target data are offset by {ra, dec} = {-1.86, 2.13} arcsec, as measured in HST images. offset in RA = 1.8573139999999967 arcseconds = 1.8573139999999967 / 3600 / cos(50.139494444 / 180 * pi) = 0.00080496788894599393 offset in DEC = 2.1318730000000016 arcsec = 2.1318730000000016 / 3600 = 0.0005921869444444448 degrees. RA halo = 179.12762708333332 - 0.00080496788894599393 = 179.12682211544438 degrees DEC halo = 50.139494444444445 + 0.0005921869444444448 = 50.140086631388 This is 11:56:30.4373, 50:08:24.31, as entered. ------------------------------------------------------------------------------------------------------------------------------------ 14601( 2) - 18-Jul-2016 16:10:48 - [ 4] Visit: 01 Visit Requirements: On Hold Comments: Additional Comments: Photometry that guides target acquisition and integration times is done with HST data from visits 1 and 30 from GO 13656. Flux was measured on the brightest UV source in 0.2 arcsec (acquisition) and 1.25 arcsec (spectroscopic observation) apertures, using the F140LP and F390W filters. Then we interpolated (power-law) between the two, to lambda=2300 AA. Fluxes are quoted in the Comments section of the Acquisition. HST datasets used for the photometry: F140LP : JCME01010 F390W : ICME30010 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 SDSSJ1156+5 COS/NUV ACQ/IMA PSA MIRRORA 1 20 S (20 008--CLUSTE GE S) R Comments: F140LP full = 45.660 adu/sec = 1.2387e-15 cgs/AA F140LP ACQ = 27.489 adu/sec = 7.4575e-16 cgs/AA F390W full = 335.631 adu/sec = 1.7145e-16 cgs/AA F390W ACQ = 227.063 adu/sec = 1.1599e-16 cgs/AA COS/NUV full = 6.5052e-16 cgs/AA COS/NUV ACQ = 4.068e-16 cgs/AA These numbers (and the beta slope) were entered into the acquisition and spectroscopic ETCs. ------------------------------------------------------------------------------------------------------------------------------------ 2 SDSSJ1156+5 COS/FUV TIME-TA PSA G160M 1600 FP-POS=1, FLASH=YES, 1 1280 S 008--CLUSTE G BUFFER-TIME=13869 (1280 S) R Comments: There are four observations take, one on each of the FP-POS positions. To estimate the performance we use the COS-aperture flux measured in the F140LP frame. (central wavelength ~1500 AA) F140LP full = 45.660 adu/sec = 1.2387e-15 cgs/AA The exposure time is taken to be 1500 seconds for all integrations. 14601( 2) - 18-Jul-2016 16:10:48 - [ 5] Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ ------------------------------------------------------------------------------------------------------------------------------------ 3 SDSSJ1156+5 COS/FUV TIME-TA PSA G160M 1600 FP-POS=2, FLASH=YES, 1 1280 S 008--CLUSTE G BUFFER-TIME=13869 (1280 S) R ------------------------------------------------------------------------------------------------------------------------------------ 4 SDSSJ1156+5 COS/FUV TIME-TA PSA G160M 1600 FP-POS=3, FLASH=YES, 1 1500 S 008--CLUSTE G BUFFER-TIME=13869 (1500 S) R ------------------------------------------------------------------------------------------------------------------------------------ 5 SDSSJ1156+5 COS/FUV TIME-TA PSA G160M 1600 FP-POS=4, FLASH=YES, 1 1500 S 008--CLUSTE G BUFFER-TIME=13869 (1500 S) R ------------------------------------------------------------------------------------------------------------------------------------ 6 SDSSJ1156+5 COS/NUV TIME-TA PSA MIRRORA BUFFER-TIME=1792, FLASH=YES 1 120 S (120 008--HALO G S) Comments: A POS-TARG is executed first. This observation is to obtain a short NUV image to confirm the pointing of the telescope after the POS-TARG. The aim is to detect the NUV continuum at SNR=20. We adopt the following calculation: In ACS/SBC/F140LP flux = 2.5708e-17 cgs/AA In WFC3/UVIS/F390W flux = 1.518e-18 cgs/AA ==> Beta = -0.7998 ==> COS/NUV flux at 2200 AA = 2.0109e-17 cgs/AA ------------------------------------------------------------------------------------------------------------------------------------ 7 SDSSJ1156+5 COS/FUV TIME-TA PSA G130M 1318 FP-POS=1, FLASH=YES, 1 1340 S 008--HALO G BUFFER-TIME=4920 (1340 S) Comments: For this we aim to detect a single emission line, the flux of which is estimated from the continuum-subtracted OVI image. Line at Center 1283.0 FWHM 0.54 Flux 4.1e-16 The continuum, as estimated in the calculation for Exposure 6, is extremely weak and likely to be undetected in spectroscopic mode. We adopt 1500 seconds as the exposure time, giving SNR=2.97 per exposure. This will then total SNR~6 PER RESEL in the combined spectrum. ------------------------------------------------------------------------------------------------------------------------------------ 14601( 2) - 18-Jul-2016 16:10:48 - [ 6] Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 8 SDSSJ1156+5 COS/FUV TIME-TA PSA G130M 1318 FP-POS=2, FLASH=YES, 1 1340 S 008--HALO G BUFFER-TIME=4920 (1340 S) Comments: For this we aim to detect a single emission line, the flux of which is estimated from the continuum-subtracted OVI image. Line at Center 1283.0 FWHM 0.54 Flux 4.1e-16 The continuum, as estimated in the calculation for Exposure 6, is extremely weak and likely to be undetected in spectroscopic mode. We adopt 1500 seconds as the exposure time, giving SNR=2.97 per exposure. This will then total SNR~6 PER RESEL in the combined spectrum. ------------------------------------------------------------------------------------------------------------------------------------ 9 SDSSJ1156+5 COS/FUV TIME-TA PSA G130M 1318 FP-POS=3, FLASH=YES, 1 1490 S 008--HALO G BUFFER-TIME=4920 (1490 S) Comments: For this we aim to detect a single emission line, the flux of which is estimated from the continuum-subtracted OVI image. Line at Center 1283.0 FWHM 0.54 Flux 4.1e-16 The continuum, as estimated in the calculation for Exposure 6, is extremely weak and likely to be undetected in spectroscopic mode. We adopt 1500 seconds as the exposure time, giving SNR=2.97 per exposure. This will then total SNR~6 PER RESEL in the combined spectrum. ------------------------------------------------------------------------------------------------------------------------------------ 14601( 2) - 18-Jul-2016 16:10:48 - [ 7] Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 10 SDSSJ1156+5 COS/FUV TIME-TA PSA G130M 1318 FP-POS=4, FLASH=YES, 1 1490 S 008--HALO G BUFFER-TIME=4920 (1490 S) Comments: For this we aim to detect a single emission line, the flux of which is estimated from the continuum-subtracted OVI image. Line at Center 1283.0 FWHM 0.54 Flux 4.1e-16 The continuum, as estimated in the calculation for Exposure 6, is extremely weak and likely to be undetected in spectroscopic mode. We adopt 1500 seconds as the exposure time, giving SNR=2.97 per exposure. This will then total SNR~6 PER RESEL in the combined spectrum. ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ SDSSJ1156+5008--CLU 1 COS/NUV ACQ/IMA PSA MIRRORA none none none none 1 N/A STER GE SDSSJ1156+5008--CLU 2 COS/FUV TIME-TA PSA G160M 1600 none none none none 1 N/A STER G SDSSJ1156+5008--CLU 3 COS/FUV TIME-TA PSA G160M 1600 none none none none 1 N/A STER G SDSSJ1156+5008--CLU 4 COS/FUV TIME-TA PSA G160M 1600 none none none none 2 N/A STER G SDSSJ1156+5008--CLU 5 COS/FUV TIME-TA PSA G160M 1600 none none none none 2 N/A STER G SDSSJ1156+5008--HAL 6 COS/NUV TIME-TA PSA MIRRORA none none none none 3 N/A O G SDSSJ1156+5008--HAL 7 COS/FUV TIME-TA PSA G130M 1318 none none none none 3 N/A O G SDSSJ1156+5008--HAL 8 COS/FUV TIME-TA PSA G130M 1318 none none none none 3 N/A O G SDSSJ1156+5008--HAL 9 COS/FUV TIME-TA PSA G130M 1318 none none none none 4 N/A O G SDSSJ1156+5008--HAL 10 COS/FUV TIME-TA PSA G130M 1318 none none none none 4 N/A O G 14601( 2) - 18-Jul-2016 16:10:48 - [ 8] Summary Form for Proposal 14601 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures PSA ------------------------------------------------------------------------------------------------------------------------------------ Configurations COS/FUV, COS/NUV ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACQ/IMAGE, TIME-TAG ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters BUFFER-TIME=13869, BUFFER-TIME=1792, BUFFER-TIME=4920, FLASH=YES, FP-POS=1, FP-POS=2, FP-POS=3, FP-POS=4 ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements G130M, G160M, MIRRORA ------------------------------------------------------------------------------------------------------------------------------------ Target Names SDSSJ1156+5008--CLUSTER, SDSSJ1156+5008--HALO ------------------------------------------------------------------------------------------------------------------------------------