Chandra HETG

HETG Principal Investigator: Prof. Claude R. Canizares

E0102 spectrum image

E0102 model spectrum

Chandra High Energy Transmission Grating (HETG)

Additions/Updates to the HETG pages

1 October
2011
The HETG pages are generally no longer updated except for:
HETG Post Docs , Quarterly Reports , Focus Trends Monitoring
31 August
2010
Added an updated technote on HETG/ACIS focus:
100831 Zeroth-order 1D FWHM vs Time
5 January
2010
Added an updated technote on HETG/ACIS focus:
100105 Zeroth-order 1D FWHM vs Time
8 Oct.
2008
HETG Software page updated to mention TGCat and Event-2D.
28 November
2007
Added an updated technote on HETG/ACIS focus:
071128 Zeroth-order 1D FWHM vs Time
31 May
2007
Added technote describing software to visualize pileup level:
070531 pileup_color.sl for color-coded pileup images.
17 May
2007
Added an updated technote on HETG/ACIS focus:
070517 Zeroth-order 1D FWHM vs Time
7 Feb.
2007
Extended sources observed with HETG added to GTO page:
HETG GTO Science Program - Extended sources link added.
16 Jan.
2007
Added link to HETG GTO observation table:
HETG GTO Science Program - Cy8; updated table.
19 Oct.
2006
Added "E0102 for Calibration" pages:
E0102 for Calibration
15 Aug.
2006
Added link to HETG GTO observation table:
HETG GTO Science Program - Cy8
28 July
2006
Added an updated technote on HETG/ACIS focus:
060728 Zeroth-order 1D FWHM vs Time
24 Oct.
2005
Added an updated technote on HETG/ACIS focus:
051024 Zeroth-order 1D FWHM vs Time
24 Oct.
2005
Added link to HETG GTO observation table:
HETG GTO Science Program - Cy7
October
2005
HETG Post Docs web page added:
HETG Post Docs
October 2005

July 2005
Publication of: Canizares et al. 2005, PASP, 117, 1144:
"The Chandra High Energy Transmission Grating: Design,
Fabrication, Ground Calibration and Five Years in Flight".
Available at ADS. (also at astro-ph/0507035 )
29 June
2005
HETG in-flight calibration web page updated:
High Energy Transmission Grating Spectrometer Calibration
10/26/2004 Added an updated technote on HETG/ACIS focus:
041026 Zeroth-order 1D FWHM vs Time
10/21/2004 Added technote confirming new ACIS geom file (rolls and gaps):
040202 Chip gaps, rolls, and HEG-MEG period, Oct. 2004
7/14/2004 HETG web pages' new design by Stargirl Designs rolled out.
New content includes GTO Science Program web page and links to reports.
7/6/2004 Added an updated technote on HETG/ACIS focus:
040706 Zeroth-order 1D FWHM vs Time
2/2/2004 Added technote on ACIS OBF contamination:
040202 ACIS OBF contamination model, "fluffium"
11/13/2002 Added technote on chip gaps and the method:
021113 Chip gaps measurement with Capella obsid 2583
5/20/2002 Added an updated technote on HETG/ACIS focus:
020520 Zeroth-order 1D FWHM vs Time
5/22/2001 Added new technote:
010522 Proton Exposure Testing of HETG Gratings
3/29/2001 Added new technote:
010227 HETGS Resolution, 2/27/01
2/27/2001 Added an updated technote on HETG/ACIS focus:
010227 Zeroth-order 1D FWHM vs Time
11/7/2000 Added terse documentation of HETG N0004 grating efficiencies to HETG Efficiency page; these efficiencies are used by CIAO 2.0 and MARX 3.0 and above.
9/22/2000 Added new technote:
000922 ACIS Pixel-size change explains HETGS absolute wavelength error.
8/28/2000 One year of HETG operation complete!
Created list of all HETG observations.
7/6/2000 Added new technote:
000713 Wings of the HETGS LRF
7/6/2000 Added new technote:
000706 HETGS Absolute Wavelengths - Preliminary
6/19/2000 Effect of not-full HETG insertion on June 15, 2000
5/4/2000 HAK-MARX example updated for MARX 3.0; HAK version 1.4 available.
5/4/2000 HETG version N0004 efficiency files available from CIP Table.
4/21/2000 See also the new CXC Instruments and Calibration HETG web pages.
4/4/2000 Added an updated technote on HETG/ACIS focus:
000404 Zeroth-order 1D FWHM vs Time
1/31/2000 Updated MARX-HAK example for MARX release 2.5 (beta)
1/18/2000 Added new technote:
000118 Zeroth-order 1D FWHM vs Time
1/17/2000 3C 273: HAK Observation Summary Output
1/14/2000 Press Release:
Chandra Finds Oxygen and Neon Rings in Ashes of Exploded Star
1/10/2000 Added new technote:
000110 Measured and modelled zeroth-order 1D projections
1/10/2000 Updated HETG Status Notes
1/7/2000 Added What's New (this) Web Page

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