Comparison of Markarian 817 spectra taken with the COS detector in 2009 and GHRS detector in 1997
Credits
NASA, ESA, and the Hubble SM4 ERO Team| About The Object | |
|---|---|
| Object Name | Markarian 817, Mrk 817, QSO J1436+5847 |
| Object Description | Active Galaxy |
| Constellation | Draco |
| Distance | 430 million light-years (132 million parsecs) |
| About The Data | |
| Data Description | The Hubble images/spectrum were created from data from proposal : 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 | HST>COS/FUV |
| Exposure Dates | August 4, 2009, Exposure Time: 1.0 hour |
| Filters | G130M (130nm) and G160M (160nm) |
| About The Object | |
|---|---|
| Object Name | A name or catalog number that astronomers use to identify an astronomical object. |
| Object Description | The type of astronomical object. |
| R.A. Position | Right ascension – analogous to longitude – is one component of an object's position. |
| Dec. Position | Declination – analogous to latitude – is one component of an object's position. |
| Constellation | One of 88 recognized regions of the celestial sphere in which the object appears. |
| Distance | The 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. |
| Dimensions | The physical size of the object or the apparent angle it subtends on the sky. |
| About The Data | |
| Data Description |
|
| Instrument | The science instrument used to produce the data. |
| Exposure Dates | The date(s) that the telescope made its observations and the total exposure time. |
| Filters | The camera filters that were used in the science observations. |
| About The Image | |
| Image Credit | The primary individuals and institutions responsible for the content. |
| Publication Date | The date and time the release content became public. |
| Color Info | A brief description of the methods used to convert telescope data into the color image being presented. |
| Orientation | The rotation of the image on the sky with respect to the north pole of the celestial sphere. |
