Credits
Illustration: NASA, ESA, and Z. Levay (STScI);Science: NASA, ESA, CXC, C. Ma, H. Ebeling, and E. Barrett (University of Hawaii/IfA), et al., and STScI
| About The Object | |
|---|---|
| Object Name | MACS J0717.5+3745 |
| Object Description | Cluster of Galaxies |
| R.A. Position | 07h 17m 33.79s |
| Dec. Position | 37° 45' 20.01" |
| Constellation | Auriga |
| Distance | 5.4 billion light-years or 1.7 billion parsecs |
| Dimensions | The image is roughly 4.5 arcminutes (7.7 million light-years or 2.4 megaparsecs) wide. |
| About The Data | |
| Data Description | Chandra Data: Chandra data used were from proposal . Hubble Data: The Hubble images were created from HST data from proposal : PI: Dr. H. Ebeling (University of Hawaii), I. Smail (University of Durham, UK), J.-P. Kneib (Laboratoire d'Astrophysique de Marseille, France), G. Smith (University of Birmingham, UK), and D. Donovan and E. Barrett (University of Hawaii). |
| Instrument | CXO>ACIS and HST>ACS/WFC |
| Exposure Dates | January 10, 2003 (CXO) and January 24, 2005 - February 9, 2005 (HST) |
| Filters | ACS: F606W (V) and F814W (I) ACIS Energies: 5 - 25 T(keV) |
| About The Image | |
| Color Info | The image is a composite of separate exposures made by the ACS instrument on the Hubble Space Telescope and the ACIS instrument onboard the Chandra X-ray Observatory. Two filters were used to sample broad wavelength ranges. A continuous energy band was used to sample the X-ray data. The color results from assigning different hues (colors) to each monochromatic image. In this case, the assigned colors are: Cyan: F606W (V) Yellow: F814W (I) Blue - Violet (temperature map): 5 - 25 T(keV) |
| Compass Image |  |
| 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. |
