LRS-2 (Low Resolution Spectrograph) Instrument Summary

  • New Intregral field spectrograph based on the VIRUS design

  • Actually 2 different spectrographs: LRS2-B and LRS2-R

  • Each spectrograph has two arms for simultaneous coverage.

  • LRS2-B covers from 370-470 and 460-700 nm at resolutions of 1900 and 1100 in each arm respectively.

  • LRS2-R covers from 650-842 and 818-1050 nm at a resolution of 1800 in each arm respectively.

  • Each unit has a 12"x6" Fiber integral field unit (IFU) with lenslet coupling, single object with sky fibers

  • 0.6" fiber/lenslets on sky.

  • 98% fill factor within IFU, so no dithering required.

  • Low scattered light

  • 15% peak throughput on the sky

  • Funded by University of Texas at Austin McDonald Observatory and Penn State University.

  • Commissioned in Spring 2016

  • For target acquisition and auto-guiding notes, see the performance page

  • For determination of where the LRS2 IFU are located in the HET setup images please see the LRS2 fiber layout page.




Last updated: Thu, 23 Nov 2017 16:14:54 -0600 shetrone



Overview

The Telescope

Technical Overview

Object Observability

Performance

Instruments

HRS-2

HRS-2 Summary

HRS-2 Details

HRS-2 configurations

HRS-2 exposure meter

HRS-2 Position Angle and Fiber layout

HRS-2 Throughput

LRS2

LRS2 Summary

LRS2 Details

LRS2 Fiber Layout and Position Angle

LRS2 Throughput

LRS2 Observing details

VIRUS

VIRUS - Summary

VIRUS - Details

VIRUS - Throughput

VIRUS - Fiber Layout and Position Angle

Old Instruments

LRS - old

Wavelength Calibration

Program Preparation

Web Management System

Other HET Documentation