VIRUS (Visible Integral-field Replicable Unit Spectrograph) Instrument Summary

  • Low scattered light

  • Predicted 50% peak throughput on the sky

  • Still populating with new spectrographs on a weekly basis. As of Jan 2019, we have 47 pairs of spectrographs installed (78 when complete).

  • VIRUS spectrographs cover 3500-5500A with R~700

  • Fibers are 1.5" diameter, IFUs are 50"x50" on the sky, separated by 50" (a 3-point dither fills in most of the intra-IFU space).

  • Total field of view is 16'x16'.

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

Last updated: Mon, 21 Jan 2019 00:36:53 -0600 stevenj


The Telescope

Technical Overview

Object Observability




LRS2 Summary

LRS2 Details

LRS2 Fiber Layout and Position Angle

LRS2 Throughput

LRS2 Observing details


VIRUS - Summary

VIRUS - Details

VIRUS - Throughput

VIRUS - Fiber Layout and Position Angle

Habitable Zone Planet Finder (HPF)

HPF Details

HPF Throughput and Exposure Meter

HPF Data Reductions


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

LRS - old

Program Preparation

Web Management System

Other HET Documentation