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News Previous Items

07 Nov 2006 [New]

CALDB version 3.2.4 has been released. This release contains ACIS time-dependent gain calibration files only. See the How CALDB 3.2.4 Affects Your Analysis section of the CIAO release notes and the CALDB release notes for details.

Download CALDB 3.2.4

31 Jul 2006

New webpage: Effective Area Cross-calibration Results Involving the Chandra X-ray Observatory

This webpage provides a discussion of cross-calibration work relating the Chandra X-ray Observatory to other X-ray missions, particularly XMM-Newton. Much of this webpage was developed in cooperation with the XMM-Newton calibration team.

Imaging

WHAT'S NEW | WATCH OUT

| Top | All | Intro | Data Prep | Timing | Imag | Imag Spec | Grating | S-Lang | Datasets || Proposal | ChaRT | Sherpa |

The Imaging threads cover a wide range of topics that include source detection, creating exposure maps and normalized images, and calculating image statistics. How to create color images for publication is addressed, as well as merging data from multiple observations.

Analysis Guides:
- HRC Imaging
- Extended Sources
General:
- Using the ACIS "Blank-Sky" Background Files
  Uses: the acis_bkgrnd_lookup script; the lc_clean.sl S-Lang script
- Updating dmgroup Syntax for CIAO 3
- Match the Binning of an Image
  Uses: the get_sky_limits script
- Create A True Color Image
  Uses: the color_image script
- Create an Image of Diffuse Emission
  Uses: the mkBgReg.pl script; the mkSubBgReg.pl script
- Using Data Cubes
Reprojecting Data:
- Merging Data from Multiple Imaging Observations
  Uses: the merge_all script
  (6 Jun 2006)
- Overview: Reprojecting Files
- Correcting Absolute Astrometry with reproject_aspect
  (24 Apr 2006)
- Reprojecting Images: Making an Exposure-corrected Mosaic
  (23 May 2006)
- Reprojecting Coordinates of a Solar System Object
Coordinates, Astrometry, & Spatial Filtering:
- Notes on Chandra Astrometric Accuracy
- Using SAOImage ds9
  Uses: the getcounts.sl S-Lang script
- Using CIAO Region Files
- Creating Source and Background Files
- Using dmcoords to Convert between CHIP and SKY Coordinates
Source Counts, Surface Brightness, & Statistics:
- Estimate Source Counts in an Image
- Obtain and Fit a Radial Profile
- Calculating Statistics of Images
  Uses: the sstats.sl S-Lang script
PSFs:
Detect:
- Overview: Detecting Sources in Imaging Observations
- Running celldetect
  Uses: the acis_expmap script
- Running vtpdetect
- Running wavdetect
- Using the Output of Detect Tools
Exposure Maps:
- Use merge_all Script to Compute ACIS Exposure Maps and Fluxed Images
  Uses: the merge_all script
- Compute Single Chip ACIS Exposure Map and Fluxed Image Step-by-Step
- Compute Multiple Chip ACIS Exposure Map and Fluxed Image Step-by-Step
- Compute an HRC-I Exposure Map and Build Fluxed Image
- Match the Binning of an Image
  Uses: the get_sky_limits script
- Calculating Spectral Weights
  Uses: the spectrum.sl S-Lang script

Hardcopy (PDF): A4 | Letter

Last modified: 19 July 2006

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