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Last modified: 26 October 2010

Alphabetical List of Ahelp Files


A C D E F G H I K L M O P R S T V W

    Topic Context Summary
A acisreadcorr tools Flag and relocate out-of-time CCD events
acisspec tools Coadd ACIS spectra and build weighted ARFs and RMFs.
acis_bkgrnd_lookup tools Find the matching ACIS "blank-sky" dataset for an observation
acis_build_badpix tools Create an observation-specific bad-pixel file
acis_classify_hotpix tools Determine whether a suspicious pixel is hot or affected by an afterglow.
acis_detect_afterglow tools Identify and flag cosmic ray afterglows
acis_fef_lookup tools Find the FITS Embedded Function file for use by mkrmf
acis_find_hotpix tools Identify pixels that have an unusually large (or small) number of events.
acis_process_events tools Produce or update TIME, coordinates, PI, GRADE, and STATUS information in ACIS event files
acis_run_hotpix tools Identify and flag "hot" pixels and cosmic-ray "afterglows."
acis_set_ardlib tools Sets the bad pixel parameters of the ardlib file to the given file
acis_streak_map tools Generate high frequency background maps (streakmaps) which identify ACIS streaks caused when bright source photons are applied to the wrong pixel during readout.
aconvolve tools Convolve an N-dimensional image with a kernel
acrosscorr tools Cross-correlate two N-dimensional images or autocorrelate an image
add_col py.crates Add a column to a crate.
add_col sl.crates Add a column to a crate.
add_grating_orders tools Add positive and negative diffraction orders of a grating PHA spectra and the corresponding ARFs
add_grating_spectra tools Add two, source and background, grating PHA spectra, averages the corresponding ARFs, and group the coadded spectrum.
add_key py.crates Add a keyword to a crate.
add_key sl.crates Add a keyword to a crate.
add_piximg py.crates Add an image to a crate.
add_piximg sl.crates Add an image to a crate.
ahelp ahelp Access the CIAO help documentation.
analysis-menu gui Run commands from the "Analysis" menu in CIAO GUIs
apowerspectrum tools Compute the power spectrum of an N-dimensional input array, or from two columns (independent/dependent variable) in an input file
apply_transform py.transform Apply a transform to the given data.
apply_transform sl.transform Apply a transform to the given data.
aprates tools Compute net counts, rate, and/or flux, plus confidence regions, for a point source, using data obtained from source and background apertures in event lists, images, and exposure maps.
ardlib calibration Analysis Reference Data Library
arestore tools Restore image resolution using deconvolution techniques
asphist tools Bin the aspect solution into a 3D histogram of duration vs pointing offset and roll offset.
autoname concept Autonaming is a feature available in various tools for automatically naming an output file based upon the name of an input file.
axbary tools Apply barycentric corrections to event times, GTIs, and header values.

C caldb calibration CALibration DataBase (CALDB)
calindex tools Create index file of calibration database (CALDB) products.
calquiz tools Find calibration files in the CALDB
calvalid tools Validate index file of calibration database (CALDB) products.
celldetect tools Use a "sliding cell" to search for sources
chandra_repro ciao_contrib Reprocess a Chandra dataset
check_caldb_version py.ciao_contrib Check whether the locally-installed version of the Chandra Calibration DataBase (CALDB) is up to date
check_ciao_caldb tools A tool to test the installation of the CIAO Calibration Database (CALDB)
ciaorc concept The .ciaorc file provides user-configuration options for CIAO
ciao_caldb py.ciao_contrib Utility routines for the CIAO CALDB (CIAO contributed package).
ciao_contrib py.ciao_contrib Contributed Crates and Sherpa routines for CIAO.
ciao_contrib sl.ciao_contrib Contributed Crates and Sherpa routines for CIAO.
ciao_runtool py.ciao_contrib Run CIAO tools from Python as if they were functions (CIAO contributed package).
ciao_smooth py.ciao_contrib Simple smoothing routines for 2D data
ciao_utils py.ciao_contrib Utility routines for CIAO (CIAO contributed package).
ciao_utils sl.ciao_contrib Utility routines for CIAO (CIAO contributed package).
ciao concept Chandra Interactive Analysis of Observations
colden proposaltools COLDEN is an interactive program to evaluate the neutral hydrogen column density at a given direction on the sky
col_exists py.crates Determine if a column exists in a crate.
col_exists sl.crates Determine if a column exists in a crate.
combine_spectra contrib Combine multiple PHA imaging spectra and associated ARF responses
coords chandra Coordinate systems used in Chandra analysis
copy_colvals py.crates Copy the column values from a crate.
copy_colvals sl.crates Copy the column values from a crate.
copy_piximgvals py.crates Copy the image values from a crate.
copy_piximgvals sl.crates Copy the image values from a crate.
copy_transform py.transform Copy the transform.
copy_transform sl.transform Copy the transform.
cratedata py.crates CrateData object types in the CRATES library.
cratedata sl.crates CrateData object types in the CRATES library.
crates_contrib py.crates_contrib Contributed CIAO routines for Crates.
crates_contrib sl.crates_contrib Contributed CIAO routines for Crates.
crates_utils py.crates_contrib Utility routines for Crates (CIAO contributed package)
crates_utils sl.crates_contrib Utility routines for Crates (CIAO contributed package)
crates py.crates CRATES - A high-level I/O interface for Python
crates sl.crates CRATES - A high-level I/O interface for S-Lang
create_bkg_map tools Create a background map for ACIS and HRC from the event files.
csmooth tools Adaptively smooth a 2-D image

D dates proposaltools DATES is an interactive calendar and time conversion tool.
dax tools Run CIAO tasks from DS9's Analysis menu
deflare tools deflare - choose either the lc_clean() or lc_sigma_clip() routine from the lightcurves.py module to remove flares from light curves.
delete_col py.crates Delete a column from a crate.
delete_col sl.crates Delete a column from a crate.
delete_key py.crates Delete a keyword from a crate.
delete_key sl.crates Delete a keyword from a crate.
delete_piximg py.crates Delete an image from a crate.
delete_piximg sl.crates Delete an image from a crate.
destreak tools Remove streak events from ACIS data
dither_region tools Compute fraction of region area that covers chips
dmappend tools Append multiple blocks/extensions to an existing output file.
dmarfadd tools Add multiple ARF files together, weighting by exposure.
dmascii dm Using the Data Model with text files
dmbinning dm The CIAO binning syntax
dmcontour tools Make contour regions from a 2-D image
dmcoords tools Convert between Chandra coordinate systems
dmcopy tools Filter and bin tables and images.
dmdiff tools Compare values in two files.
dmellipse tools finds best fit ellipse for specified fraction
dmextract tools Make a histogram table file (e.g. PHA file, lightcurve file) from a table column. Generate count histogram on supplied regions for a spatial table or image file.
dmfiltering dm Filtering tables and images with the Data Model
dmfilth tools Replace pixel values in source regions of an image with values interpolated from surrounding background regions
dmgroupreg tools Translates DS9 regions and groups to CIAO format.
dmgroup tools Group a specified column in a table with various options
dmgti tools Create a Good Time Interval from limits placed on time-based files (event and Mission Time Line files).
dmhedit tools Edit datamodel file headers
dmhistory tools Extracts the tool history from the file header
dmimg2jpg tools Make a color JPEG image (or EPS) from three image files
dmimgadapt tools Adaptively smoothes an image based on number of counts
dmimgblob tools Identifies groups of pixels above/below threshold
dmimgcalc tools Perform arithmetic on images
dmimgfilt tools Performs various non-linear image filtering techniques.
dmimghist tools Create a histogram of the pixel values in a 2-D image
dmimglasso tools Draw region around point with similar values
dmimgpick tools Maps image values to rows in a table
dmimgpm tools Compute a low frequency spatial (modified poisson mean) background map
dmimgproject tools Project image along axis
dmimgreproject tools Replicates table value along axis of image
dmimgthresh tools Set low (or high) intensity or exposure regions of an image to a constant value.
dmjoin tools Join two files whose sampling is different.
dmkeypar tools Retrieve information about a keyword from an input file
dmlist tools List contents or structure of a file.
dmmakepar tools Write header keywords to a parameter file
dmmakereg tools Convert a region string to a CXC FITS region file
dmmaskbin tools Bins an image based on input mask
dmmaskfill tools Replaces mask values with those found in lookup table
dmmath tools Syntax used for writing mathematical operations in dmtcalc, dmimgcalc, and dmgti
dmmerge tools Merge two or more compatible tables (e.g. event files) into one.
dmnautilus tools performs a quad-tree adaptive binning on 2D images
dmopt dm Controlling Data Model internal options
dmpaste tools Add new columns to a table.
dmreadpar tools Create header keywords from a parameter file
dmregions dm CIAO region filtering syntax
dmregrid2 tools shift, rotate, scale images
dmregrid tools Rebin a stack of 2-dimensional images.
dmsort tools Sort a table.
dmstat tools Compute statistics for images and columns in tables.
dmtcalc tools Modify and create columns in a table
dmtype2split tools Create a type 1 PHA output file for specified rows of a type 2 PHA file.
dm dm CIAO Data Model: syntax for filtering and binning files
download_chandra_obsid tools Download public data by ObsId from the Chandra archive.

E eff2evt tools Compute the flux and look up the QE & effective area for event positions
evalpos tools Get image values at a specified (RA,DEC)
eventdef chandra Column definition in Chandra event files

F fullgarf tools Create a grating ARF for a particular order and grating for a given observation.

G get_axis_transform py.crates Return the axis transform from an IMAGECrate.
get_axis_transform sl.crates Return the axis transform from an IMAGECrate.
get_caldb py.ciao_contrib Access various information about the Chandra Calibration DataBase (CALDB)
get_colvals py.crates Get the column values from a crate.
get_colvals sl.crates Get the column values from a crate.
get_col_names py.crates Return an array of the column names in a crate.
get_col_names sl.crates Return an array of the column names in a crate.
get_col py.crates Return a CrateData object of a column from a crate.
get_col sl.crates Return a CrateData object of a column from a crate.
get_crate_item_type py.crates Return the type of the crate item as a string.
get_crate_item_type sl.crates Return the type of the crate item as a string.
get_crate_type py.crates Return the type of the crate as a string.
get_crate_type sl.crates Return the type of the crate as a string.
get_keyval py.crates Return the value of a keyword in a crate.
get_keyval sl.crates Return the value of a keyword in a crate.
get_key_names py.crates Return an array of the keywords in a crate.
get_key_names sl.crates Return an array of the keywords in a crate.
get_key py.crates Return a CrateKey object of a keyword from a crate.
get_key sl.crates Return a CrateKey object of a keyword from a crate.
get_number_cols py.crates Return the number of columns in a crate.
get_number_cols sl.crates Return the number of columns in a crate.
get_number_rows py.crates Return the number of rows in a crate.
get_number_rows sl.crates Return the number of rows in a crate.
get_piximgvals py.crates Return the values from an image crate.
get_piximgvals sl.crates Return the values from an image crate.
get_piximg_shape py.crates Return the dimension array describing the image shape.
get_piximg_shape sl.crates Return the dimension array describing the image shape.
get_piximg py.crates Return a CrateData object of an image from a crate.
get_piximg sl.crates Return a CrateData object of an image from a crate.
get_sky_limits tools Find the region covered by an image in sky coordinates
get_src_region tools Outputs regions that have counts higher than background
get_transform_matrix py.crates Extract the transform matrix from a crate.
get_transform_matrix sl.crates Extract the transform matrix from a crate.
get_transform_type py.transform Return the flavor of the input Transform object.
get_transform_type sl.transform Return the flavor of the input Transform object.
get_transform py.crates Extract the transform from a crate.
get_transform sl.crates Extract the transform from a crate.
glvary tools Search for variability using Gregory-Loredo algorithm.
group_slang modules The S-Lang interface to the CXC grouping library
grpAdaptiveSnr group Adaptively group an array by signal to noise.
grpAdaptive group Group an array by the number of counts per group using an adaptive scheme.
grpBinFile group Group an array using the grouping applied to another dataset.
grpBinWidth group Group an array into a set of equal-width groups (by group width).
grpBin group Group an array using low and high boundaries.
grpGetChansPerGroup group Calculate the number of channels (elements) in each group.
grpGetGroupSum group Apply the supplied grouping to an array.
grpGetGrpNum group Calculate the group number for each element in the array.
grpMaxSlope group Group an array so that its absolute gradient is above a user-defined limit.
grpMinSlope group Group an array so that its absolute gradient is below a user-defined limit.
grpNumBins group Group an array into a set of equal-width groups (by number of groups).
grpNumCounts group Group an array by the number of counts per group.
grpSnr group Group an array by signal to noise.
gui gui Graphical User Interface (GUI)

H hrc_bkgrnd_lookup tools Find the matching HRC "blank-sky" dataset (event file or spectrum) for an observation
hrc_build_badpix tools Create observation-specific bad pixel file for HRC
hrc_dtfstats tools Calculate statistics from hrc_calc_dead_time and a GTI
hrc_process_events tools Correct HRC event positions, times, PHA, etc.

I is_arf py.crates Determine if the crate contains an ARF.
is_arf sl.crates Determine if the crate contains an ARF.
is_pha py.crates Determine if the crate contains a PHA file.
is_pha sl.crates Determine if the crate contains a PHA file.
is_rmf py.crates Determine if the crate contains an RMF.
is_rmf sl.crates Determine if the crate contains an RMF.
is_virtual py.crates Determine if the input column from the crate is a virtual column.
is_virtual sl.crates Determine if the input column from the crate is a virtual column.

K key_exists py.crates Determine if the keyword exists in the crate.
key_exists sl.crates Determine if the keyword exists in the crate.

L lc_clean py.contrib lc_clean - remove periods of high (or low) count rates using the same technique as the ACIS background files
lc_clean sl.contrib lc_clean - remove periods of high (or low) count rates using the same technique as the ACIS background files
lc_sigma_clip py.contrib lc_sigma_clip - remove flares from a light curve using an iterative sigma-clipping algorithm (used to be called analyze_ltcrv)
lc_sigma_clip sl.contrib lc_sigma_clip - remove flares from a light curve using an iterative sigma-clipping algorithm (used to be called analyze_ltcrv)
level chandra Describes the amount of processing performed to create a given product.
lightcurves py.contrib lightcurves - routines to remove periods of anomalously high (or low) count rates in a lightcurve
lightcurves sl.contrib lightcurves - routines to remove periods of anomalously high (or low) count rates in a lightcurve
lim_sens tools Create an output limiting sensitivity map with the same blocking factor, dimensions and WCS

M make_instmap_weights tools make_instmap_weights - produces a weighted spectrum file usable with mkinstmap in order to create a weighted exposure map.
make_psf_asymmetry_region tools Create a region that shows the location of the HRMA PSF asymmetry for a source
make_table_crate py.crates_contrib Create a TABLE Crate from a set of arrays (columns).
make_table_crate sl.crates_contrib Create a TABLE Crate from a set of arrays (columns).
merge_all tools Combine any number of observations. If desired, create corresponding exposure maps and exposure-corrected images.
merging_rules concept A description of the merging rules used when combining header information.
mkacisrmf tools Generate an RMF for Chandra imaging data
mkarf tools Generate an ARF for Chandra imaging data (and grating 0-th order)
mkbgreg tools Creates a stack of background regions for a given source list
mkexpmap tools Generate a Chandra imaging exposure map (effective area vs. sky position)
mkgarf tools Generate a Chandra Grating ARF for one detector element.
mkgrmf tools Generate an RMF for Chandra grating data
mkinstmap tools Generate a Chandra instrument map (effective area vs. detector position)
mkpsfmap tools Look up the PSF-size for each pixel in an image
mkpsf tools Extract a point spread function (PSF) from the PSF library.
mkrmf tools Generate an RMF for Chandra imaging data
mksubbgreg tools Subtracts source regions from background regions
mkwarf tools Generate a weighted ARF for Chandra ACIS data
modelflux sherpa_tools Calculate model flux or count rate
mtl_build_gti tools Create Good Time Interval from Mission Time Line and limits
mtl chandra A description of the Mission Time Line (MTL)

O obsvis proposaltools ObsVis is the Observation Visualizer created at the Chandra Science Center in Cambridge Massachusetts, USA.

P paccess paramio Returns the path to the specified parameter file.
paccess tools Gives the location of a tool's parameter file
paramclose paramio Close a parameter file opened by paramopen.
parameter concept Describes the parameter interface used by CIAO.
paramio modules The S-Lang interface to the CXC parameter system
paramopen paramio Open a parameter file.
pdump tools Dumps the values of the parameters, with one parameter per line.
peg gui PEG: the parameter editor GUI (for CXCDS parameter interface)
pgets paramio Read/write individual parameter values from S-Lang.
pget paramio Get a parameter value within S-Lang.
pget tools Get parameter values
pileup_map tools Compute image that gives indication of pileup.
pileup chandra An overview of pileup in the Chandra ACIS detector.
pimms proposaltools PIMMS (Portable, Interactive Multi-Mission Simulator) converts source fluxes and count rates between missions.
pixlib modules The S-Lang interface to the CXC pixlib library
pix_apply_aspect pixlib Convert from FPC to Sky tangent coordinates by applying an aspect solution.
pix_chip_to_fpc pixlib Convert from the Chip to Focal Plane coordinate (FPC) system.
pix_chip_to_gdp pixlib Convert from the Chip to Grating Dispersion Plane (GDP) coordinate system.
pix_chip_to_tdet pixlib Convert from the Chip to Tiled Detector (TDET) coordinate system.
pix_close_pixlib pixlib Convert between different Chandra coordinate systems in S-Lang
pix_deapply_aspect pixlib Convert from Sky tangent coordinates to FPC by reversing the aspect solution.
pix_disp_config pixlib Display the current settings of the pixlib module.
pix_dmTanPixToWorld pixlib Convert from FPC to World (celestial) coordinates by applying an aspect solution.
pix_dmTanWorldToPix pixlib Convert from World (celestial) to FPC coordinates by applying an aspect solution.
pix_fpc_to_chip pixlib Convert from the Focal Plane (FPC) to Chip coordinate system.
pix_fpc_to_gdp pixlib Convert from the Focal Plane (FPC) to Grating Dispersion Plane (GDP) coordinate system.
pix_fpc_to_msc pixlib Convert from the Focal Plane (FPC) to Mirror Spherical (MSC) coordinate system.
pix_gac_to_gdp pixlib Convert from the Grating diffracted Angular coordinates (GAC) to Grating Dispersion Plane (GDP) coordinate system.
pix_gdp_to_gac pixlib Convert from the Grating Dispersion Plane (GDP) to Grating diffracted Angular coordinates (GAC) system.
pix_get_energy pixlib Return the photon energy corresponding to a given grating dispersion (GAC) value.
pix_get_flength pixlib Return the value of the telescope focal length used by the pixlib module.
pix_get_fp_scale_in_asec pixlib Returns the pixel size in arcsec for the current detector
pix_get_grating_angle pixlib Return the grating angle of the currently-selected grating arm.
pix_get_grating_period pixlib Return the grating period of the currently-selected grating arm.
pix_get_grating_wavelength pixlib Return the photon wavelength corresponding to a given grating dispersion (GAC) value.
pix_get_rowland pixlib Return the value of the Rowland Circle diameter used by the pixlib module.
pix_init_pixlib pixlib Initialize the pixlib library.
pix_set_aimpoint pixlib Set the aim point to be used by the pixlib module.
pix_set_detector pixlib Set the detector to use in the pixlib routines.
pix_set_fpsys pixlib Set the focal plane system for the pixlib module.
pix_set_gdpsys pixlib Set the grating dispersion plane (GDP) system for the pixlib module.
pix_set_grating pixlib Set the grating arm and order to use in the pixlib module.
pix_set_gzo pixlib Set the grating zero-order position for the pixlib module.
pix_set_simoffset pixlib Set the stage position for the pixlib module.
pix_set_tdetsys pixlib Set the tiled detector plane system for the pixlib module.
pix_tdet_to_chip pixlib Convert from the Tiled Detector (TDET) to Chip coordinate system.
pline tools Display the parameter values, with all parameters on a single line
plist_names paramio List parameter names for a single tool from S-Lang.
plist tools List the contents of a parameter file.
pquery paramio Query a parameter value from S-Lang.
pquery tools Query whether a parameter exists and, if so, get and return its value.
precess proposaltools PRECESS is an interactive astronomical coordinate conversion program. It provides precession of equatorial coordinates and conversion between equatorial, ecliptic, galactic, and supergalactic coordinates.
print_axis_names py.crates Display the names of the axes in an image.
print_axis_names sl.crates Display the names of the axes in an image.
print_col_names py.crates Display the names of the columns in a crate.
print_col_names sl.crates Display the names of the columns in a crate.
print_key_names py.crates Display the names of the keywords in a crate.
print_key_names sl.crates Display the names of the keywords in a crate.
prism gui Format-independent file browsing GUI
prop-coords proposaltools Defines available coordinate systems for Chandra Proposal Tools
prop-time proposaltools Defines available calendars and timescales for command line versions of Chandra Proposal Tools
prop-tools proposaltools Tools that aid in the preparation and submission of Chandra proposals
pset paramio Set a parameter value within S-Lang.
pset tools Set parameter values on the command line
psextract tools Extract source and background ACIS spectra for point-like sources and build associated ARFs and RMFs.
psf_project_ray tools Project rays generated by ChaRT onto a semi-infinite detector plane.
punlearn paramio Restore the system defaults for a parameter file from S-Lang.
punlearn tools Restore system default parameter values
python scripting Python is a dynamic object-oriented programming language

R read_arf py.crates Load an ARF file into an ARFCrate.
read_arf sl.crates Load an ARF file into an ARFCrate.
read_file py.crates Read FITS or ASCII data into a crate.
read_file sl.crates Read FITS or ASCII data into a crate.
read_pha py.crates Load a PHA file into a PHACrate.
read_pha sl.crates Load a PHA file into a PHACrate.
read_rmf py.crates Load an RMF file into an RMFCrate.
read_rmf sl.crates Load an RMF file into an RMFCrate.
regArea region Calculate the area enclosed by a region.
regExtent region Calculate the bounding box of a region.
regInsideRegion region Is a point (or set of points) inside a region?
region modules The S-Lang interface to the CXC region library
regParse region Parse a region for use by the routines in the region library
regPrintRegion region Print out details about a region.
regRegionString region Print out details about a region.
reproject_aspect tools Modify aspect solution file RA, Dec, and roll or updfile WCS to minimize position differences between two source lists.
reproject_events tools Regrid an event file to a different tangent point
reproject_image_grid tools Projects image from one WCS to another
reproject_image tools Projects image from one WCS to another
rmfimg tools Create a simple image of an RMF or ARF file

S scale_image_crate py.crates_contrib Scale the pixel values in an IMAGE crate (useful for add_image)
scale_image_crate sl.crates_contrib Scale the pixel values in an IMAGE crate (useful for add_image)
set_colvals py.crates Set the values of a column in a crate.
set_colvals sl.crates Set the values of a column in a crate.
set_keyval py.crates Set the keyword value in a crate.
set_keyval sl.crates Set the keyword value in a crate.
set_piximgvals py.crates Set the image values in a data array.
set_piximgvals sl.crates Set the image values in a data array.
simple_hist py.ciao_contrib Create a one-dimensional histogram of a data array
simple_hist sl.ciao_contrib Create a one-dimensional histogram of a data array
simple_stats py.ciao_contrib Calculate several basic statistic values for a data array
simple_stats sl.ciao_contrib Calculate several basic statistic values for a data array
skyfov tools Make a field-of-view region in sky coordinates
slang slang The S-Lang programing language
slsh slang Evaluate and run S-Lang code.
smooth_image_crate py.crates_contrib Smooth the pixel values in an IMAGE crate (useful for add_image)
specextract tools Extract source and background ACIS spectra for point-like and extended sources and build associated WMAPs, ARFs and RMFs.
srcextent sherpa_tools Determine if a source is extended within a confidence interval.
sso_freeze tools Reproject sky x and y coordinates into a Solar System Object centered reference frame.
stackio modules The S-Lang interface to the CXC stack library
stack concept How to set a parameter to more than one value using a stack.
stk_append stackio Add an item (or items) to a stack.
stk_build stackio Build a stack from text input (file name or regular expression).
stk_build tools stk_build is used to build a stack from a user-defined string. The output is to stdout, stderr, or a file.
stk_change_current stackio Change the current element of a stack.
stk_change_num stackio Change the given element of a stack.
stk_close stackio Close a stack.
stk_count stackio Returns the number of elements in a stack.
stk_count tools stk_count is used to count the number of items in a stack. The output is to the stk_count parameter file.
stk_current stackio Returns the current position of the stack.
stk_delete_current stackio Deletes the current element from the stack.
stk_delete_num stackio Deletes the specified element from the stack.
stk_disp stackio Display the contents of a stack.
stk_expand_n stackio Create a numbered stack of N elements.
stk_read_next stackio Returns the next element from a stack.
stk_read_num stackio Returns the selected element from a stack.
stk_read_num tools stk_read_num is used to read one element of a user-defined stack. The output is to the outelement field of the stk_read_num parameter file.
stk_rewind stackio Rewind the stack to its starting position.
stk_set_current stackio Sets the current position of the stack.
stk_where tools stk_where finds the location of an item in a stack
subspace concept Describes the filtering applied to a file

T taskmonitor gui GUI to run a task as a background process and display the output
tgdetect tools Detect and centroid the zero order image in a spatial sub-region of a grating event list.
tgextract2 tools Bin event list grating wavelengths column into a one-dimensional counts histogram, by source, grating part, and diffraction order. Optionally bin background spectrum.
tgextract tools Bin event list grating wavelengths column into a one-dimensional counts histogram, by source, grating part, and diffraction order.
tgidselectsrc tools Filter an input source list based upon a SNR threshold.
tgmatchsrc tools Match sources between two source lists by their 2-D separation files.
tg_bkg tools Creates a PHA background file for use in XSPEC
tg_create_mask tools Create a region file to define spectrum sky boundaries
tg_resolve_events tools Assign grating events to spectral orders; use detector energy resolution for order separation, if available.
times chandra "Times" used in Chandra datasets and Chandra data analysis
transform py.transform TRANSFORMS - A high-level interface for the Transform library
transform sl.transform TRANSFORMS - A high-level interface for the Transform library

V vtpdetect tools Voronoi Tessellation and Percolation (VTP) source detection

W wavdetect tools Mexican-Hat Wavelet source detection (wtransform+wrecon)
wcs_match tools Create a frame transformation to minimize the aspect difference between data from the same sky region.
wcs_update tools Modify aspect solution file RA, Dec, and roll or infile WCS based on a transformation matrix.
wrecon tools Combine wavelet transform coefficients into sources
write_arf py.crates Write an ARFCrate to an output file.
write_arf sl.crates Write an ARFCrate to an output file.
write_arrays py.crates_contrib Write arrays to an ASCII file
write_arrays sl.crates_contrib Write arrays to an ASCII file
write_columns py.crates_contrib Write out arrays (columns) to a file as a table (ASCII or FITS format).
write_columns sl.crates_contrib Write out arrays (columns) to a file as a table (ASCII or FITS format).
write_file py.crates Write a crate to an output file.
write_file sl.crates Write a crate to an output file.
write_pha py.crates Write a PHACrate to an output file.
write_pha sl.crates Write a PHACrate to an output file.
write_rmf py.crates Write an RMFCrate to an output file.
write_rmf sl.crates Write an RMFCrate to an output file.
wtransform tools Obtain wavelet transform coefficients for poisson image data

Last modified: 26 October 2010