File:ABELL 2147 83074000 rad.gif

No higher resolution available.

ABELL_2147_83074000_rad.gif (512 × 256 pixels, file size: 3 KB, MIME type: image/gif)

This is a file from the Wikimedia Commons. Information from its description page there is shown below.
Commons is a freely licensed media file repository. You can help.

Summary

DescriptionABELL 2147 83074000 rad.gif	English: The extraction regions were chosen based on an exposure corrected, combined GIS-2 and GIS-3 sky image. Reference sky coordinates from the literature were used as input to a centroid routine to determine the cluster center right ascension and declination. A radial emission profile was then constructed from this position. Note that this radial profile does not reflect the true cluster profile given the complicated PSF of the ASCA mirrors and the GIS detector. The background (and sigma of the background) was iterative determined by stepping inward from the end of the profile and averaging (using a three sigma clipping algorithm). The extraction region was chosen to be the radius at which the radial profile reached 5sigma times the background level. The radial profile is shown below. The red line is the background level. The blue line is the 5sigma level. SIS extaction radii were set at 0.70 times the GIS extraction radius.
Date	before 10 December 2005 date QS:P,+2005-12-10T00:00:00Z/7,P1326,+2005-12-10T00:00:00Z/11
Source	http://eud.gsfc.nasa.gov/Donald.Horner/acc/html/ABELL_2147_83074000.html at the Wayback Machine
Author	Astrophysics Science Division (ASD) at NASA/GSFC, Donald Horner

Licensing

	This file is in the public domain in the United States because it was solely created by NASA. NASA copyright policy states that "NASA material is not protected by copyright unless noted". (See Template:PD-USGov, NASA copyright policy page or JPL Image Use Policy.)
	Warnings: Use of NASA logos, insignia and emblems is restricted per U.S. law 14 CFR 1221. The NASA website hosts a large number of images from the Soviet/Russian space agency, and other non-American space agencies. These are not necessarily in the public domain. Materials based on Hubble Space Telescope data may be copyrighted if they are not explicitly produced by the STScI.[1] See also {{PD-Hubble}} and {{Cc-Hubble}}. The SOHO (ESA & NASA) joint project implies that all materials created by its probe are copyrighted and require permission for commercial non-educational use. [2] Images featured on the Astronomy Picture of the Day (APOD) web site may be copyrighted. [3] The National Space Science Data Center (NSSDC) site has been known to host copyrighted content. Its photo gallery FAQ states that all of the images in the photo gallery are in the public domain "Unless otherwise noted."

File history

Click on a date/time to view the file as it appeared at that time.

	Date/Time	Thumbnail	Dimensions	User	Comment
current	22:34, 8 December 2023		512 × 256 (3 KB)	SANSbura xD	Uploaded a work by from https://web.archive.org/web/20160306053726/http://eud.gsfc.nasa.gov/Donald.Horner/acc/html/ABELL_2147_83074000.html with UploadWizard

File usage

The following page uses this file:

Abell 2147

File:ABELL 2147 83074000 rad.gif

Summary

Licensing

Captions

Items portrayed in this file

depicts

star cluster

copyright status

public domain

media type

image/gif

File history

File usage