hydra.asutexas.edu

 


 


 




 

Medium-Resolution Spectrograph (decommissioned)

DevelopmentsLinks
Mar
2009
Baffling succeeds in blocking glow effect
Dec
2008
Glow area appears on chip
Nov
2006
MRS cryotiger back in service
Jun
2006
MRS cryotiger malfunctions
Sep
2005
Repaired MRS shutter back in service
Jul
2005
MRS shutter malfunctions
Jan
2005
New blind offsetting capability
Aug
2002
SPIE MRS paper describes the instrument
Aug
2002
First light

The medium resolution spectrograph (MRS) has been available to the HET community from trimester 2003-2. The MRS is currently functioning in the basic single object "Direct Feed" mode in the visible beam. The direct feed mode, which utilizes what the MOS 0 probe, has a object/sky pair of blue optimized (Polymicro Technologies (PT) FVP300330370500) and red optimized (PT FIP 300330370500) fibers that project to 1.5 arcsec on the sky and yield a fixed resolution of about 7000. The object and sky fibers are separated by about 10 arcsec. There are also single 2 arcsec red or blue optimized fiber options that yield a resolution of about 5000. These modes have all been tested with cross-disperser #1 with peak efficiency at 600 nm and efficiency above 2/3 peak over the 450 to 900 nm range available. Quantitative first estimates of the performance yield, for a S/N=100 per pixel in 1800 sec, a limiting magnitude of R~ 13.8 at a resolution of 7000; i.e. the 1.5 arcsec fiber, and R~ 14.2 for a resolution of 5000, i.e. a 2 arcsec fiber. At the 2x2 binning used, a pixel is about 0.02 nm.



Last updated: Fri, 29 Dec 2023 11:55:47 +0000 stevenj



Overview

The Telescope

Technical Overview

Object Observability

Performance

Non-sidereal observations

Instruments

LRS2

LRS2 Summary

LRS2 Details

LRS2 Fiber Layout and Position Angle

LRS2 Throughput

LRS2 Observing details

VIRUS

VIRUS - Summary

VIRUS - Setting up on targets

VIRUS - Misc details

VIRUS - Throughput and sensitivity

VIRUS - low surface brightness sensitivity

VIRUS - Dithers, IFUs, Tiling

VIRUS - Tiling observations

Habitable Zone Planet Finder (HPF)

HPF Details

HPF Setting up on targets

HPF Throughput and Exposure Meter

HPF Data Reductions

HRS-2 (in development)

HRS-2 Summary

HRS-2 Details

HRS-2 configurations

HRS-2 exposure meter

HRS-2 Position Angle and Fiber layout

HRS-2 Throughput

Old Instruments

HRS - old

LRS - old

MRS - old

Program Preparation

Web Management System