STScI Logo

Space Telescope Science Institute

Run Now

Specview is a tool for 1-D spectral visualization and analysis of astronomical spectrograms. It is written in Java thus can be run anywhere Java is supported. Specview is capable of reading all the Hubble Space Telescope spectral data formats, as well as data from several other instruments (such as IUE, FUSE, ISO, FORS and SDSS), preview spectra from MAST, and data from generic FITS and ASCII tables. It can also read data from Virtual Observatory servers, and read and write spectrogram data in Virtual Observatory SED format. It can also read files in the SPC Galactic format used in the chemistry field.

Once ingested, data can be plotted and examined with a large selection of custom settings. Specview supports instrument-specific data quality handling, flexible spectral units conversions, custom plotting attributes, plot annotations, tiled plots, hardcopy to JPEG files and PostScript file or printer, etc.

A spectral feature quick measurement tool enables the user, with a few mouse actions, to perform and record, in VOTable or FITS format, measurements on selected spectral features.

Specview can be used to build wide-band SEDs, overploting or combining data from the same astronomical source taken with different instruments and/or spectral bands. Data can be further processed with averaging, splicing, detrending, and Fourier filtering tools.

Specview has a spectral model fitting capability that enables the user to work with multi-component models (including user-defined models) in a number of ways, and fit models to data.

Support exists for overplotting and interactively renormalize data from spectral templates.

Specview can overplot spectral line identifications taken from a variety of line lists, including user-supplied lists.

Specview in application form can be downloaded from here.

An empty Specview applet can be downloaded to work with data files in your computer from here

Screen shots with a few examples can be seen here.

Specview is distributed with the install4j installer provided by ej-technologies

Specview is also hosted at SourceForge


  • Astronomer's Proposal Tools
    The goal of the APT project is to improve the proposal preparation process, in order to provide users with a more intuitive, visual, and interactive experience by means of state of the art technology.
  • Percy
    Percy is an interactive computer program which provides ephemeris and geometrical event information about solar system objects.
  • PyFITS
    PyFITS is a Python module for working with FITS files.
  • PyRAF
    PyRAF is an environment that combines the power and flexibility of Python with the ability to use IRAF and STSDAS tasks.
  • SpecView
    SpecView is a spectral visualization and analysis tool.
  • Spike Planning and Scheduling System
    Multi-Mission Planning and Scheduling System used for HST and other astronomical missions.
  • ST Grants Management System
    STScI Grants Management System (ST GMS), developed for administration of Space Telescope grants, is a flexible solution for granting agencies, investigators, and research administrators.
  • StarView
    StarView is an astronomical database browser and research analysis tool.
  • stsci_python
    stsci_python is a collection of applications and tools distributed by STScI for astronomical data analysis.
    STSDAS is a software package for analyzing astronomical data.
    TABLES is an external package in IRAF that provides support for tabular data for STSDAS and other packages.