HST Spectroscopic Legacy Working Group Areas for Recommended Work in FY2014 and Beyond Meeting 26 Jun 2013

Overview Group has tried to identify main threads from the “Enhancing the Legacy of HST Spectroscopy” Workshop held at STScI on Nov 15-16, 2012 Membership of the group is as follows: Alessandra Aloisi (chair) Jerry Kriss Azalee Bostroem Cristina Oliveira Ken Carpenter Rachel Osten Stefano Casertano (co-chair) Lou Strolger Scott Fleming Jeff Valenti Andrew Fox Rick White 5 major areas of discussion were identified and explored: Combining spectra Spectral tools that are already available but people are not aware of Extracting multi-object spectra automatically Extracting information from spectra Target information and classification Identified the following tasks as priorities for the next couple of years (ordered from the highest to the lowest priority): Make combined 1D spectral products available and create the pipeline to do it Visualization tools for spectra Characterization/classification of sources Feature identification and measurement (develop equivalent of source extractor for spectra) Confluence used for collecting and storing material, and for tracking discussion

1) Make Combined 1D Spectral Products Available and create the Pipeline to do it (Part 1) High priority, but will require ~ 2 years Ultimate purpose of this activity is to combine 1D spectroscopic data together. In order to do so a spectroscopic pipeline is required. Task should be done incrementally by increasing the difficulty/complexity of the 1D spectroscopic data that are handled by the combination process Several pipelines already exist (developed by individuals or science teams) and can be used to facilitate design and requirements Typically existing pipelines are tailored to specific science goals. A more general design is required. The writing of the pipeline should be done in steps: The tool can start as an off-line tool manually triggered to create new high-level products for our own HST data into the HLA. This will allow us to get something quickly and with high visibility. It could evolve into part of the OPUS/MAST. Ultimately it could become a stand-alone tool offered to the community, similarly to an ASTRODRIZZLE for spectroscopy.

1) Make Combined 1D Spectral Products Available and create the Pipeline to do it (Part 2) For combination of 1D homogeneous data (HST similar instrument and resolution): Phase 1 (6 months, FY 2014-Q1,Q2): design and requirements 0.3 FTE-year scientist 0.2 FTE-year RIA 0.5 FTE-year developer Phase 2 (18 months, through FY 2015): development and testing 0.5 FTE-year scientist 1.0 FTE-year RIA 1.5 FTE-year developer Phase 3 (partially overlapping with Phase 2, continuing effort): implementation, data processing and ingestion 1.5 FTE-year RIA/scientist (HLA FTEs) until the bulk of the data is ingested (start midway throughout second year of effort) For combination of heterogeneous data, add 50% or more could be partly done in parallel For extended sources, the second dimension needs to be added (2D spectroscopy) High-level products (and possibly pipeline) need to be advertised with the community

2) Visualization Tools for Spectra Medium-high priority, mostly based on adaptation of existing tools We envision these tools as web-based and included in the Archive portal. The tools will allow for a quick look and basic measurements of the spectroscopic data available in the archive A lot of tools already exist spread throughout MAST, HLA, and VO Existing tools are OK for a quick look and some basic measurements Existing tools need improvements to become more user friendly and for more in depth analysis Everything should be consolidated into the portal Timeframe is driven by integration into the portal Resources needed: 1.0 FTE-year scientist 0.5 FTE-year for a scientist responsible for the project 0.5 FTE-year for several other scientists that would provide requirements and test the tools 0.5 FTE-year developer These tools need to be advertised with the community

3) Characterization/Classification of Sources Medium priority, relatively lower cost, may bring results in less than a year applicable to all HST data (imaging and spectroscopy) COS and STIS spectroscopy can be given higher priority if desired Short-term approach based on literature analysis and dynamic search tool literature analysis: associates datasets and publications also includes PI-provided keywords Effort ongoing, 1.0 FTE-year of an RIA (Archive) needed to complete analysis of past literature Dynamic search tool to be integreted into the portal based on VO lexicon 0.5 FTE-year from developer 0.5 FTE-year from science aware user(s) to test and refine interface Future developments could include catalog-based classification and crowd sourcing This capability within the portal needs to be advertised with the community

4) Feature Identification and Measurement (Develop the Equivalent of Source Extractor for Spectra) Medium priority, partly based on adaptation of existing tools May require multiple options to handle different types of data (emission/absorption, bands, forests; high S/N vs. low S/N; continuum structure) Task needs to be started after the process of classifying the spectroscopic sources has been completed Useful tool may be obtained in ~ 1 year Resources needed: 1.0 FTE-year scientist 0.5 FTE-year developer This capability needs to be advertised with the community

Other Areas of Possible Interest Multi-Object Spectral Extraction and Characterization (e.g., Grisms) Not championed within working group May be best led by instrument teams (e.g., WFC3 + JWST instrument teams) Tools to visualize and analyze time dependence Common framework yet to be established HST data in meta-catalogs

Summary of Resources Year 1 Year 2 Scientist (INS) RIA Developer (OED) HLA staff (HMO) Combined 1D spectra and pipeline 0.4 0.6 1.0 0.5 1.5 Visualization tools Source classification Feature identification and measurement TOTALS 1.9 1.6 2.0 Resources amount to a total of ~ 6 FTEs per year spread between INS (COS/STIS team & RIAB), OED, and HLA over a couple of years to get the bulk of the high priority items advanced to a significant level.