0 Assigned ID: 887 ----- Attempting Submission 1 (Fri Apr 08 21:55:20 GMT 2016) ----- HST Phase I Proposal 887 (LAB_GO.apt) successfully submitted. Receipt: # 887-1 The list of Investigators does not match the STScI records for this program. The number of orbits used exceeds the number allocated The unique ID for this investigator was not found in the STScI database. Hopefully final version, with correct dithers for each orbit. -2146615527 ----- Attempting Submission 1 (Mon Jun 27 19:55:45 GMT 2016) ----- ----- Attempting Submission 3 (Wed Aug 24 16:49:40 GMT 2016) ----- Low redshift Lyman-alpha blobs Lyman-alpha blobs (LABs) are luminous nebula at redshifts of 2 and beyond. Their nature and ionization sources are mysterious. The lack of accessible diagnostic emission lines and the poorly understood Lyman-alpha escape mechanism have so far prevented a consistent physical picture of LABs. We suggest that many LABs harbor transient AGN that have recently and quickly faded from our view; the Ly-alpha photons from the earlier quasar phase, however, are resonantly scattered and slowly released over times much longer than the LABs' light crossing time. These ionization echoes naturally explain the severe power deficits observed in LABs. We have identified a rare population of ultra-luminous [OIII] ionization echoes around transient AGN at redshifts z=0.3. They share many characteristics of LABs, including high Lyman-alpha luminosities of up to 7e43 erg/s as suggested by GALEX FUV images. We ask to observe three targets to verify the strong Lyman-alpha emission using ACS/SBC. This would prove that LABs may still exist in the Universe 7 billion years later than most other LABs known. It would also show that fading AGN explain the power deficits of many LABs, solving a puzzle that has been standing for over a decade. This proposal exploits the unique far-UV capabilities of HST. This program aims to obtain far-UV spectra and images with ACS/SBC, for a total of three targets. The targets are galaxies at redshift 0.3, embedded in luminous clouds of ionized gas. The clouds have diameters between 10-25 arcseconds, and we want to determine their Lyman-alpha properties. Each target has one visit, consisting of two orbits. In the first orbit, we take a slitless spectrum of the source, followed by an image in the second orbit. The science exposures (spectrum and image) are split into two sub-exposures of approximately equal length (1300s), using a line dither pattern to reject detector defects. The purpose of the spectrum (first orbit) is to determine the total amount of flux in the Lyman-alpha line, and to measure the flux in the continuum (if any). The purpose of the image (second orbit) is to obtain a deeper view to determine morphology and size. Ihe image is also needed to reduce the slitless spectrum. Absolute flux calibration is important. This will mainly be based on the slitless spectrum, where we can isolate the effects of the red leaks. All our targets are covered by GALEX imaging, no FUV-bright stars are in the field of view. Galaxies 6 false true false false false false SUPPORTED GALAXY EMISSION LINE NEBULA LYMAN ALPHA CLOUD NLR QUASAR YES Source diameter: 5x15 arcsec J0113+0106 J2000 J2000 r=18.5, GALEX FUV=15.9 microjansky integrated over the entire source GALAXY EMISSION LINE NEBULA LYMAN ALPHA CLOUD NLR QUASAR YES Source diameter: 20x25 arcsec A small offset in DEC has been introduced with respect to the nucleus of the galaxy. This is to better accomodate the extended nebulosity in the SBC field of view. The offset is noticable in the target confirmation chart. J1155-0147 J2000 J2000 r=17.9, GALEX FUV=40.8 microjansky integrated over the entire source GALAXY EMISSION LINE NEBULA LYMAN ALPHA CLOUD NLR QUASAR YES Source diameter: 6x8 arcsec J2240-0927 J2000 J2000 r=18.3, GALEX FUV=21.2 microjansky integrated over the entire source ACS/SBC Spectroscopic No No PR130L ACS/SBC Imaging No No F140LP ACS/SBC Spectroscopic No No PR130L ACS/SBC Imaging No No F140LP ACS/SBC Spectroscopic No No PR130L ACS/SBC Imaging No No F140LP POS-TARG DITHER 0.472 We choose the default line pattern to reject detector blemishes LINE false false 2 44.4 ACS-SBC-DITHER-LINE 1 false The scheduling data was generated by CASM 24.2. CASM was run in Phase II mode. 1503383913000 255.4153696316689 (Tic-Visit :proposal-id 14749 :visit-id "01" :proposal-version -1 :trans-version "20160601" :date "24-Aug-2016 13:43:56.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 2 :saa-model "28" :si-bright-earth-limb-angle 20.0 :data-volume 111088 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 14749 :visit-id "01" :obset-id "01" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 14749 :visit-id "01" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2702 :al-overhead-at-end 0 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3035 :pcs-gap 0 ) (Tic-Orbit :proposal-id 14749 :visit-id "01" :orbit-number 2 :pcs-time 222 :si-vis-utilization 2813 :al-overhead-at-end 0 :internal-dur-at-end 158 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3035 :pcs-gap 0 ) true 2 0 Single image Single image Slitless spectroscopic image The scheduling data was generated by CASM 24.2. CASM was run in Phase II mode. Target coordinates include a small offset with respect to the nucleus of galaxy to better accomodate the extended flux. 1500330887000 114.46485128605491 (Tic-Visit :proposal-id 14749 :visit-id "02" :proposal-version -1 :trans-version "20160601" :date "24-Aug-2016 13:44:34.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 2 :saa-model "28" :si-bright-earth-limb-angle 20.0 :data-volume 111088 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 14749 :visit-id "02" :obset-id "02" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 14749 :visit-id "02" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2702 :al-overhead-at-end 0 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3035 :pcs-gap 0 ) (Tic-Orbit :proposal-id 14749 :visit-id "02" :orbit-number 2 :pcs-time 222 :si-vis-utilization 2813 :al-overhead-at-end 0 :internal-dur-at-end 158 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3035 :pcs-gap 0 ) true 2 0 Single image Single image Slitless spectroscopic image The scheduling data was generated by CASM 24.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 14749 :visit-id "03" :proposal-version -1 :trans-version "20160601" :date "24-Aug-2016 13:47:08.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 2 :saa-model "28" :si-bright-earth-limb-angle 20.0 :data-volume 111088 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 14749 :visit-id "03" :obset-id "03" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 14749 :visit-id "03" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2701 :al-overhead-at-end 0 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3034 :pcs-gap 0 ) (Tic-Orbit :proposal-id 14749 :visit-id "03" :orbit-number 2 :pcs-time 222 :si-vis-utilization 2812 :al-overhead-at-end 0 :internal-dur-at-end 158 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3034 :pcs-gap 0 ) true 2 0 Single image Single image Slitless spectroscopic image Target coordinates include a small offset with respect to the nucleus of galaxy to better accomodate the extended flux. (Tic-Visit :proposal-id 14749 :visit-id "02" :proposal-version -1 :trans-version "20160601" :date "24-Aug-2016 13:44:34.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 2 :saa-model "28" :si-bright-earth-limb-angle 20.0 :data-volume 111088 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 14749 :visit-id "02" :obset-id "02" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 14749 :visit-id "02" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2702 :al-overhead-at-end 0 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3035 :pcs-gap 0 ) (Tic-Orbit :proposal-id 14749 :visit-id "02" :orbit-number 2 :pcs-time 222 :si-vis-utilization 2813 :al-overhead-at-end 0 :internal-dur-at-end 158 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3035 :pcs-gap 0 ) false 2 0 Single image Single image Slitless spectroscopic image