Suggested Searches

1 min read

Markarian 817 COS Spectrum

Markarian 817 COS Spectrum
Comparison of Markarian 817 spectra taken with the COS detector in 2009 and GHRS detector in 1997

About the Object

  • Constellation
    ConstellationOne of 88 recognized regions of the celestial sphere in which the object appears.
    Draco
  • Distance
    DistanceThe physical distance from Earth to the astronomical object. Distances within our solar system are usually measured in Astronomical Units (AU). Distances between stars are usually measured in light-years. Interstellar distances can also be measured in parsecs.
    430 million light-years (132 million parsecs)

About the Data

  • Data Description
    Data DescriptionProposal: A description of the observations, their scientific justification, and the links to the data available in the science archive.
    Science Team: The astronomers who planned the observations and analyzed the data. "PI" refers to the Principal Investigator.
    The Hubble images/spectrum were created from data from proposal 11505: K. Noll (STScI) and J. Green, C. Froning, and B. Keeney (University of Colorado, Boulder). Acknowledgments for Markarian 817 Observers: K. Noll (STScI) and J. Green, C. Froning, and B. Keeney (University of Colorado, Boulder) Data Analysis: J. Anderson and M. Mutchler (STScI), and C. Froning and J. Green (University of Colorado, Boulder) Image Composition: Z. Levay and L. Frattare (STScI) Text: L. Frattare, D. Weaver and R. Villard (STScI) Illustrations: A. Feild and Z. Levay (STScI) Video Animation: G. Bacon (STScI) Science Consultants: M. Livio (STScI) and C. Froning and J. Green (University of Colorado, Boulder)
  • Instrument
    InstrumentThe science instrument used to produce the data.
    HST>COS/FUV
  • Exposure Dates
    Exposure DatesThe date(s) that the telescope made its observations and the total exposure time.
    August 4, 2009, Exposure Time: 1.0 hour
  • Filters
    FiltersThe camera filters that were used in the science observations.
    G130M (130nm) and G160M (160nm)
  • Object Name
    Object NameA name or catalog number that astronomers use to identify an astronomical object.
    Markarian 817, Mrk 817, QSO J1436+5847
  • Object Description
    Object DescriptionThe type of astronomical object.
    Active Galaxy
  • Release Date
    September 9, 2009
  • Science Release
    Hubble Opens New Eyes on the Universe
  • Credit
    NASA, ESA, and the Hubble SM4 ERO Team

Downloads

  • PDF
    (899.12 KB)
  • 3000 × 1470
    (659.99 KB)
  • 200 × 200
    (11.91 KB)
  • 400 × 196
    (28.29 KB)
  • 1000 × 490
    (91.21 KB)

Share

Details

Last Updated
Mar 28, 2025
Contact
Media

Claire Andreoli
NASA’s Goddard Space Flight Center
Greenbelt, Maryland
claire.andreoli@nasa.gov