ESA NGST Science Study Team

Integral Field vs. Multi-Object spectrograph trade-off study

This is a working page for the SST subgroup charged with the task of assessing the trade-off between the Integral Field and Multi-Object options for the NGST 1-5 micron spectrograph.

Group membership

• Bob Fosbury (coordinator)
• Guenther Hasinger (AWG)
• Santiago Arribas
• Olivier Le Fevre

Working emails

From Bob Fosbury - 29 Jan 99 , 17 Feb 99 , 16 Mar 99

From Guenther Hassinger - 29 Jan 99

From Santiago Arribas - 01 Feb 99 , 17 Feb 99 , 18 Feb 99 , 9 Apr 99

From Olivier Le Fevre - 01 Feb 99

From Pete Stockman - 02 Feb 99

Working documents and tools

• SST 28jan99 - Bob Fosbury's viewgraphs on surface brightness density measurements from HDF-S (NICMOS and STIS) (pdf)
• FTS/FP/Grating Spectrograph Trade-off Space - Design Trade Space: FTS/FP/Grating Based Spectrometers; S. Satyapal & M. A. Greenhouse. 1. Comparison of Point Source Sensitivities Draft: 26 Dec 1998 (pdf)
• ApJ, 1998, 503, L19-L22 - DEEP H-BAND GALAXY COUNTS AND HALF-LIGHT RADII FROM HUBBLE SPACE TELESCOPE/NICMOS PARALLEL OBSERVATIONS. Lin Yan, Patrick J. McCarthy, Lisa J. Storrie-Lombardi, and Ray J. Weymann (pdf)
• Design Reference Mission - updated version from Eric Smith, 3 Feb. 1999 (Excel spreadsheet)
• Representative L* galaxy magnitudes (AB at K) and exposure times for low resolution spectroscopy have been calculated for three galaxy types (Im, Sbc and gE) as a function of redshift using the NGST exposure time calculator. The data - and plots of AB_K vs z - and t_exp vs z - are given.
• HDF-S source catalogues - at STScI web
• NGST exposure time calculator - new version (NMS) from 11 Jun 1999
• Santiago Arribas has prepared v2 of a document describing the effects of crowding and edge effects on the efficiency of the MOS design. Available as ps and pdf. 30 June 1999

Further work on the topic can be accessed here