MIT CXC Documents

CONTENTS:

Subject: ACIS
04/28/17
 
07/15/14
      
    acis_build_chip_gti spec 

    *** Disregard. The acis_build_chip_gti specs are flawed. ***

    This document describes a specification for the ACIS tool acis_build_chip_gti.

    Download PDF (92 K), B/W PDF (92 K), PS (200 K) or LaTeX source (21 K) of Rev. 2.1 (07/15/14)

    Download PDF (90 K), B/W PDF (90 K), PS (200 K) or LaTeX source (20 K) of Rev. 2.0 (06/22/14)

    Download PDF, PS (102 K) or LaTeX source (8 K) of DRAFT Rev. 1.1 (11/08/04)

 
04/04/07
 
02/11/11
 
04/28/17
 
05/11/06
 
04/28/17
 
01/19/07
      
    acis_process_events: bad-pixel spec 

    This document describes a specification for the use of bad-pixel files by the ACIS tool acis_process_events.

    Download PDF, PS (68 K) or LaTeX source (4 K) of Rev. 1.0 (01/19/07)

 
10/01/02
      
    acisreadcorr spec 

    This document describes a specification for the computation of TIME for the ACIS tool acisreadcorr.

    Download PDF, PS (51 K) or LaTeX source (5 K) of Rev. 1.3b (10/01/02)

 
03/01/11
      
    Afterglow detection efficiency 

    This document describes the afterglow detection efficiency of acis_run_hotpix.

    Download PDF (224 K), PS (136 K) or LaTeX source (20 K) of Rev. 1.2 (03/01/11)

    Download PDF (224 K), PS (136 K) or LaTeX source (20 K) of Rev. 1.1 (10/07/10)

 
03/15/00
      
    ACIS Analysis Reference Data Interface Control Document 

    This document describes the formats of the Analysis Reference Data files used by the ACIS tools.

    Download PDF, PS (113 K) of Rev 2.1 (03/15/00)

    Download PDF, PS (119 K) of Rev 2.0 (11/30/99)

    Download PDF, PS (525 K) or LaTeX source of Rev 1.3 (03/12/99)

 
09/05/06
      
    Bias header keywords 

    This spec describes how to determine the values of some of the keywords in the header of an ACIS bias file.

    Download PDF, PS (61 K) or LateX source (2 K) of Rev. 1.0 (09/05/06)

 
11/14/13
 
05/25/11
 
03/10/08
      
    Check VFAINT background 

    This document describes an algorithm that can be used to search for potential cosmic-ray background events in the data for TIMED VFAINT mode observations.

    Download PDF (79 K), PS (157 K) or LateX source (5 K) of Rev. 1.4 (03/10/08)

    Download PDF, PS (158 K) or LateX source (5 K) of Rev. 1.3 (09/22/06)

    Download PDF, PS (157 K) or LateX source (5 K) of Rev. 1.2 (09/01/06)

    Download PDF, PS (153 K) or LateX source (5 K) of Rev. 1.1 (04/24/06)

    Download PDF, PS (150 K) or LateX source (5 K) of Rev. 1.0 (04/24/06)

 
10/27/10
 
02/19/13
 
07/20/13
      
    Computation of ENERGY and PI 

    This document describes how to compute ENERGY and PI for ACIS event data.

    Download PDF (176 K), B/W PDF (176 K), PS (200 K) or LateX source (200 K) of Rev. 1.0 (07/20/13)

 
03/18/14
      
    Computation of FLTGRADE, GRADE, and PHA 

    This document describes how to compute FLTGRADE, GRADE, and PHA for ACIS event data.

    Download PDF (86), B/W PDF (86 K), PS (192 K) or LateX source (14 K) of Rev. 1.7 (03/18/14)

    Download PDF, PS (88 K) or LateX source (7 K) of Rev. 1.5 (01/08/07)

    Download PDF, PS (64 K) or LateX source (7 K) of Rev. 1.4 (05/16/03)

    Download PDF, PS (64 K) or LateX source (7 K) of Rev. 1.3b (09/09/02)

    Download PS (280 K) of Rev. 1.1 (04/02/99)

 
09/09/02
      
    Computation of ONTIME, DTCOR, and EXPOSURE 

    This document describes how to compute TIMEDEL, FLSHTIME, ONTIME, DTCOR, and EXPOSURE for ACIS event data.

    Download PDF, PS (66 K) or LaTeX source (11 K) of Rev. 1.2b (09/09/02)

 
09/09/02
      
    Computation of QUERY_VAL 

    This document describes how to compute QUERY_VAL for ACIS housekeeping data.

    Download PDF, PS (59 K) or LaTeX source (13 K) of Rev. 1.1 (09/09/02)

    Download PDF, PS (59 K) or LaTeX source (13 K) of Rev. 1.0 (08/26/02)

 
04/04/06
      
    Computation of X, Y, and TIMEs of arrival of CC-mode events 

    This document describes how to compute the sky coordinates and times of arrival of photons at the detector for CC-mode event data.

    Download PDF, PS (95 K) or LaTeX source (12 K) of Rev. 4.6 (04/04/06)

    Download PDF, PS (99 K) or LaTeX source (12 K) of Rev. 4.5 (01/14/05)

    Download PDF, PS (61 K) or LaTeX source (11 K) of Rev. 4.4 (04/25/03)

    Download PDF, PS (60 K) or LaTeX source (12 K) of Rev. 4.3b (09/09/02)

    Download PDF, PS (58 K) or LaTeX source (91 K) of Rev. 4.1 (12/18/01)

    Download PS (1.7 M) file of Chandra Calibration Workshop presentation, November 2002 (11/07/02)

 
02/27/07
      
    A caveat about FLTGRADE = 255 in Level 1 event files 

    This document describes why Level 1 event files can contain events that have FLTGRADE = 255.

    Download PDF, PS (66 K) or LaTeX source of Rev 1.0 (02/27/07)

 
03/18/14
      
    Grade ARD spec 

    This spec describes the grade ARD file structure.

    Download PDF (78 K), B/W PDF (78 K), PS (200 K) or LaTeX source (15 K) of Rev 1.0 (03/18/14)

 
02/11/11
 
10/23/00
 
09/11/00
 
06/08/05
      
    Notes about ACIS instrument geometry data 

    This document describes some self-consistency tests of the LSI coordinates of the ACIS CCDs.

    Download PDF, PS (142 K) or LaTeX source of Rev 1.0 (06/08/05)

 
06/12/07
      
    Mean biases 

    This document describes a specification for computing observation-specific biases from mean biases.

    Download PDF (59 K), PS (75 K) or LaTeX source (3 K) of Rev 1.2 (06/12/07)

    Download PDF (52 K), PS (66 K) or LaTeX source (2 K) of Rev 1.1 (06/04/07)

    Download PDF (52 K), PS (66 K) or LaTeX source (2 K) of Rev 1.0 (05/30/07)

 
02/01/17
      
    mkacisrmf 

    This document describes a specification for computing an ACIS RMF.

    Download PDF (131 K), B/W PDF (131 K), PS (273 K) or LaTeX source (34 K) of Rev 1.00 (02/01/17)

 
07/10/02
      
    ACIS pipeline processing caveats 

    This document describes caveats about ACIS pipeline-produced event data.

    HTML (07/10/02)

 
02/28/00
      
    ACIS pipeline processing tools 

    This document describes the ACIS pipeline processing tools.

    Download PDF or PS (90 K) of DRAFT of Rev 2.1 (02/28/00)

    Download PDF or PS (89 K) of Rev 2.0 (11/01/99)

 
06/07/13
      
    S4 streak algorithm 

    This document describes an algorithm used to identify horizontal, instrumental, streak events on ACIS-S4.

    Download PDF (1574 K) of the August 1, 2000 document (06/07/13)

 
08/15/13
      
    S4 streak loss parameter 

    This document describes a better implementation of the fractional loss parameter of the tool that identifies horizontal, instrumental, streak events on ACIS-S4.

    Download PDF (1933 K) or Source files (288 K) of Rev. 2.0 (08/15/13)

    Download PDF (2640 K) of Rev. 1.1 (06/12/13)

    Download PDF (2594 K) of Rev. 1.0 (06/10/13)

 
06/07/13
      
    S4 streak properties 

    This document describes the properties of the horizontal, instrumental, streak events on ACIS-S4.

    Download PDF (328 K) of the March 16, 2004 document (06/07/13)

 
04/28/17
 
05/18/09
 
09/30/13
 
03/16/17
      
    Temperature-dependent RMF spec 

    This document describes how a script could be used to create a temperature-dependent RMF.

    Download PDF, (76 K) B/W PDF, (76 K) PS (216 K) or LaTeX source (8 K) of Rev 1.01 (03/16/17)

    Download PDF, (73 K) B/W PDF, (73 K) PS (216 K) or LaTeX source (7 K) of Rev 1.00 (02/02/17)

 
04/06/03
      
    Time-dependent gain ARD 

    This document describes the format of the ARD file used to compute the time-dependent gain adjustment.

    Download PDF, PS (53 K) or LaTeX source (5 K) of Rev 1.0 (06/04/03)

 
06/02/06
 
11/15/04
      
    New ACIS-S geometry file  

    This document specifies the update on ACIS-S CCD chip corner positions and MEG grating period.

    Download PS (562 K) or LaTeX source (16 K) of Rev 1.0 (11/15/04)

 
Subject: HETG and LETG; HRC-S
2015.11.04
      
    Grating/CC-mode enhancements  

    This memo describes changes made to acis_process_events and tg_resolve_events which improve order-sorting through a second pass of processing which uses the HETG-processing-determined CHIPY position to re-do CTI/gain/tgain corrections.

    Current version: PDF Ver. 1.0 (04 Nov 2015)

2015.08.13
      
    Tests/validation of new HRC-S QE and LETG EEFRAC 

    This memo shows test of the revised HRC-S QE and LETG EEFRAC (in the LSFPARM file). The LETGS effective area should be unchanged. EEFRAC changes were required for custom extractions which can improve a weak lines signal-to-noise ratio.

    Current version: PDF Ver. 1.0 (11 August 2015)

2015.10.14
      
    tgdetect2, tg_choose_method specifications 

    Current version: PDF TEX Ver. 0.2 (11 Sept 2012)

    Overview PDF

2015.10.14
      
    tg_findzo specifications 

    Current version: PDF TEX Ver. 1.0 (13 Dec 2012)

2013.06.24
      
    HRC-S Tgain correction (for reduced background); LETG/HRC-S spectral filtering after HRC-S Tgain correction 

    This document describes the HRC-S time-dependent linearized PI computation ("SPI") for background reduction and associated CALDB "t_gmap" file (appropriate for all HRC-S observations), and the associated HRC-S/LETG event filter required for spectral extraction from Tgain-corrected HRC-S events (CALDB "pireg_tgain" file).

    Current version: PDF Ver. 1.4 (24 November 2009)

    Previous version: PDF Ver. 1.3 (8 July 2009)

11/02/04
      
    LETG+ACIS-S Spurious Rotation Issue  

    This document describes the LETG+ACIS-S spurious rotation issue.

    Download PS (331 K) or LaTeX source (12 K) of Ver. 1.0 (11/02/04)

 
2004.06.11
      
    Technical Note: LETG/ACIS-S rotation compensation  

    Modification to extraction region to compensate for anomalous rotation residuals.

    Download PS  

03/23/06
      
    Finding Zeroth Order Position  

    This document describes a new algorithm of detecting zeroth order position.

    Download PS (238 K) or LaTeX source (77 K) of Ver. 1.4 (04/11/07)

 
03/27/99
      
    Transmission Grating L1.5 to Archive Interface Control Document  

    A detailed description of Grating L1.5 (event diffraction coordinates) data products.

    Download PS   LaTeX source    Change-Orders.

    Previous version: Download PS   LaTeX source   

05/28/99
      
    Transmission Grating Level 2 to Archive Interface Control Document  

    A description of Grating Level 2 data products (binned spectrum).

    Download PS LaTeX source   Change-Orders.

    Previous version: Download PS   LaTeX source   

06/04/99
04/22/99

Subject: PSF
12/28/01
10/07/98
02/24/00
      
    LSF LIBRARY and TOOLS TECHNICAL REFERENCE 

    The LSF Library and Tools Technical Reference.  

    download PS   .....  (588 K) 

    HTML   .....   

12/28/01
06/10/04
      
    Data Randomization / New Header Keywords  

    This document describes how we propose to implement additional FITS keywords into Level 1 Event products and higher.

    Download PS (53 K) or LaTeX source (6 K) of Rev 0.2 (03/01/04)

    Download PS (53 K) or LaTeX source (6 K) of Rev 0.3 (03/03/04)

    Download PS (53 K) or LaTeX source (6 K) of Rev 0.4 (03/15/04)

    Download PS (53 K) or LaTeX source (6 K) of Rev 1.0 (06/10/04)

 
05/03/04
      
    LSFPARM for HETG+ACIS-S validated for unrandomized datasets  

    This document describes the quality of new non-randomized LSFPARM products for HETG+ACIS-S configuration.

    Download PS (376 K) or LaTeX source (39 K) of Ver. 1.0 (04/26/04)

    Download PS (372 K) or LaTeX source (40 K) of Ver. 1.1 (05/03/04)

 
05/03/04
      
    LSFPARM for LETG+HRC-S validated for unrandomized datasets  

    This document describes the quality of new non-randomized LSFPARM products for LETG+HRC-S configuration.

    Download PS (287 K) or LaTeX source (9 K) of Ver. 1.0 (05/03/04)

 
07/20/04
      
    LSFPARM for LETG+ACIS-S validated for unrandomized datasets  

    This document describes the quality of new non-randomized LSFPARM products for LETG+ACIS-S configuration.

    Download PS (181 K) or LaTeX source (26 K) of Ver. 1.0 (07/20/04)

 
01/22/07
      
    Updated LSFPARM for MEG+ACIS-S for unrandomized datasets  

    This document describes the quality of new non-randomized LSFPARM products for MEG+ACIS-S configuration.

    Download PS (185 K) or LaTeX source (20 K) of Ver. 1.0 (01/22/06)

 
Subject: Analysis Reference Data
3/26/99
04/21/98
      
    Spectroscopy Database: Analysis Reference Data ICD 

    The format of the Spectroscopy Database files to be used in L2 spectral analysis is described here.

    Download PS .... (511K)

    Download LaTeX source .... (40K ARD_template)


Subject: ISIS
1/8/99
      
    ISIS: Interactive Spectral Interpretation System
    Describes the functions we wish to include in the analysis system for high 
    resolution X-ray spectra (currently under development). 

    Download PS   .....  (392 K) 

 
Subject: Exposure Map
2/09/99
2/08/99
      
    Aspect Histogram Processing and Data Products ICD 

    Download PDF, PS, or LaTeX source (About 14 pages/1 MB de-compressed)

09/11/2000
      
    Introduction to Exposure Maps 

    Download PDF or PS (12 pages, about 1 Mb uncompressed)


Subject: Miscellaneous

    Notes by David Huenemoerder from CXC S-Lang classes (January, 2003)
    (ps) (pdf)
    The Slides (a less detailed version of the Notes):
    (ps) (pdf)

12/13/2001
      
    CIAO 3 Interactive Analysis Planning
 
04/02/97
      
    AXAF Transmission Grating Diffraction Coordinates
    Describes the transformation from reported event positions 
    to dispersion coordinates. 

    Download PS   .....  (101 K) 

 
[ MIT/ASC Home page | Staff | Calibration | Analysis | Spectroscopy ]
[ Science Gallery | Software | Documentation | Links | Local Access ]


Glenn Allen (and SDS friends) - gea@space.mit.edu

Last Updated: April 28, 2017 by GEA