File:ACIS X-ray Spectrum (2000-0596-more-1).jpg

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ACIS X-ray Spectrum This image illustrates the X-ray afterglow spectrum of GRB991216 obtained with the Advanced CCD Imaging Spectrometer (ACIS) instrument aboard the Chandra X-ray Observatory on December 18, 1999.

Summary

Description	English: ACIS X-ray Spectrum This image illustrates the X-ray afterglow spectrum of GRB991216 obtained with the Advanced CCD Imaging Spectrometer (ACIS) instrument aboard the Chandra X-ray Observatory on December 18, 1999. The ACIS instrument is an array of charged coupled devices (CCDs). This instrument is especially useful because it can make X-ray images, and at the same time, measure the energy of each incoming X-ray, as depicted in this image.
Date	3 November 2000 (upload date)
Source	ACIS X-ray Spectrum
Author	(Credit: NASA/CNR/L.Piro et al)

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	Date/Time	Thumbnail	Dimensions	User	Comment
current	17:08, 15 June 2024		682 × 555 (120 KB)	OptimusPrimeBot (talk \| contribs)	#Spacemedia - Upload of https://chandra.si.edu/photo/2000/0596/0596_acis_spectrum.jpg via Commons:Spacemedia

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Source	Chandra X-ray Observatory
Headline	Gamma Ray Burst observed on December 18, 1999.
Credit/Provider	NASA/CNR/L.Piro et al.
Author	Chandra X-ray Observatory Center
Image title	An international team of researchers used the Chandra X-ray Observatory to detect never-before-seen properties in the X-ray afterglow of a gamma-ray burst (GRB). GRBs are mysterious blasts of high-energy radiation, believed to be the most powerful explosions in the universe. Chandra's latest discovery of iron emission lines from the ejected material surrounding GRB991216 strengthens the case for a "hypernova" model for GRBs. In this theory, GRBs are caused by massive stars that collapse under their own weight, releasing gigantic amounts of energy.
Short title	Chandra Helps Put The Pieces Together On Gamma-Ray Bursts
Usage terms	http://chandra.harvard.edu/photo/image_use.html
Date and time of data generation	3 November 2000
Exif version	2.21
Image width	682 px
Image height	555 px
Color space	Uncalibrated
Width	682 px
Height	555 px
Pixel composition	RGB
Number of components	3
Horizontal resolution	72 dpi
Vertical resolution	72 dpi
Bits per component	8 8 8
Date metadata was last modified	09:37, 31 January 2011
Contact information	cxcpub@cfa.harvard.edu http://chandra.harvard.edu 60 Garden St. Cambridge, MA, 02138 USA 617.496.7941
Keywords	GRB 991216
IIM version	2

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