Data for Threads - CIAO 4.0

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CIAO 4.0 Homepage
Introduction: Welcome; Tools & Applications
Data Analysis: Analysis Guides; Science Threads; ChIPS Threads; Sherpa Threads; ChaRT Threads; Why Topics; Help Pages (AHELP)
Documentation: "Watch Out" List; Bug List; Frequently Asked Questions (FAQ); Manuals & Memos; Dictionary; Chandra Publications
Download CIAO: Download CIAO 4.0; System Requirements; Installation Instructions; Platform Support; Release Notes; Version History; Analysis Scripts; CIAO Website; Contributed Software
Sherpa (Modeling and Fitting): Sherpa website; Threads; Help Files
ChIPS (Plotting Package): ChIPS website; Threads; Help Files
S-Lang in CIAO: Introduction; Scripts and Packages; Modules
Data Products: Data Basics; Data Products Guide; Data Caveats; Standard Data Processing; Reprocessing III; Chandra Data Archive
Workshops and Conferences: Oct 2008 Workshop; Program Information; Previous Workshops; AAS HEAD 2008
CXC Links: CALDB; ChaRT; ObsVis; ATOMDB; WebGUIDE; Astrostatistics Collaboration; CXO Cross-calibration Page
Site Map

Analysis Notes

Matching CIAO and CALDB Versions

CIAO 4.0 requires CALDB 3.4.0 or higher to operate properly.

Are your versions mismatched? Time to update CIAO and CALDB!

Source Detection and Cosmic-Ray Afterglows

CIAO users who are trying to detect sources of about 10 counts or less should be aware of potential confusion with cosmic-ray afterglows that have not been removed from the data.

The Cosmic-Ray Afterglows why topic explains the limitations of the current tools and describes analysis tips to help eliminate more of the afterglows.

News

Previous Items

07 May 2008 [New]

Information about installing CIAO on unsupported platforms has been added to the Platforms webpage

16 Apr 2008 [New]

CIAO has been patched to CIAO 4.0.2.

The CIAO 4.0.2 patch enables CIAO to run on Mac OS X 10.5 (Leopard) Intel. The patch is optional for 10.4 (Tiger) Intel machines.

The patch should not be applied to Linux, Solaris, or Mac PowerPC installations of CIAO.

Download the 4.0.2 patch.

Additionally, there is an updated standalone version of ObsVis for Mac OS X Intel; see the ObsVis website for details and the download.

16 Apr 2008 [New]

Mac OS X platforms: FITS table file writing slowness with NFS-mounted disks.

FITS table file writing through the CXC Data Model slows by a significant factor on Mac OS X machines - both 10.4 (Tiger) and 10.5 (Leopard) - when the data is accessed via a networked file system (NFS) mount. This issue does not affect Solaris or Linux platforms.

Data for CIAO 4.0 Threads

Data Used in Threads

How to Download Chandra Data from the Archive

Sorted by OBSID

OBSID

Object

Instrument

Threads

Trapezium Cluster

HETG/ACIS-S

Multiple ACIS Spectra

Alpha Cen

LETG/HRC-S

Multiple HRC Spectra

133

PSR B0540-69

ACIS-I

Barycenter Correction, Phase-binned Spectrum

139

BL Lacertae

ACIS-I

Improving Astrometry (with 461)

144

G21.5-0.9

HRC-I

HRC-I Degap, HRC Exposure Map, Bad Pixel File (with 1557, 1843)

170

Crab Pulsar

ACIS-S/HETG

CC-mode Times of Arrival

315

NGC 4038/
NGC 4039

ACIS-S

Image Diffuse Emission

441

Chandra Deep Field South

ACIS-I

Reprojecting Aspect (with 581)

459

3C 273

HETG/ACIS-S

Extract Spectra & Make RMFs/ARFs, Examine PHA2 (with 460, 1198, 1800), HETG/ACIS-S Grating Spectra & gARFs, Add Grating Orders, Add Grating Spectra (with 2463), Afterglow Correction, Coadding Spectra (with 2463), PHA Background, ACIS gRMFs

460

3C 273

LETG/HRC-S

LETG/HRC-S Grating Spectra & gARFs, Examine PHA2 (with 459, 1198, 1800), HRC-S gRMFs

461

3C 273

HRC-I

Improving Astrometry (with 139)

578

3C 295

ACIS-S

Detecting Sources, Coordinates for src2 Files

581

Chandra Deep Field South

ACIS-I

Reprojecting Aspect (with 441)

650

GK Persei

ACIS-S

Create Source and Background Files

884

0235+164

ACIS-S

Clean ACIS Background

1198

3C 273

LETG/ACIS-S

LETG/ACIS-S Grating Spectra & gARFs, Examine PHA2 (with 459, 460, 1800)

1447

Cas A

ACIS-I

Extended Source Spectra

1451

II Peg

HETG/ACIS-S

Color Spectrum

1463

Jupiter

ACIS-S

Reprojecting Coordinates

1522

Trapezium Cluster

ACIS-I

Using celldetect (with 578)

1557

G21.5-0.9

HRC-S

HRC-S Degap, Bad Pixel File (with 144, 1843), HRC AMP_SF Correction

1703

PKS 2149-306

LETG/ACIS-S

Correct Zero-order Source Position

1712

3C 273

ACIS-S

Filtering Lightcurves, Destreak, Using ds9, Using Region Files, ACIS Background (with 1838), Readout Streak

1800

PKS 2155-304

LETG/HRC-I

Examine PHA2 (with 459, 460, 1198)

1801

PKS 2155-304

LETG/HRC-I

LETG/HRC-I Grating Spectra & gARFs

1838

G21.5-0.9

ACIS-S

ACIS Data Preparation, Match Binning, True Color Image, Estimating Counts, ACIS Exposure Maps, Radial Profile, Create a PSF

1842

G21.5-0.9

ACIS-I

Merging Data (with 1843), ACIS Exposure Maps (with 1843)

1843

G21.5-0.9

ACIS-I

Introduction, General Data Preparation, Merging Data (with 1842), ACIS Exposure Maps (with 1842), Bad Pixel File (with 144, 1557)

2463

3C 273

HETG/ACIS-S

Add Grating Spectra (with 459), Coadding Spectra (with 459)

3207

3C 294

ACIS-S

Weighted ARFs & RMFs