The Swift UVOT Grism Calibration and Software

Here you can find the description of the Swift UVOT grism calibration in much detail as well as the latest version of the software (in Python) and the grism calibration files.

Introduction to the UVOT grisms

• UVOT description (MSSL UVOT website)
• The UVOT filter wheel (MSSL UVOT website)

• The UVOT MIC image intensifier
• Description of the grisms
• Summary of the Swift UVOT grism properties
• order layout

• The grism point Spread Function
• Attitude drift during observations

Considerations for observing with the UVOT grisms

• Notes for observing with the UVOT UV Grism
• Notes for Observing with the UVOT Visible Grism

Calibration

• The wavelength calibration of the UVOT Grisms
  • History of the wavelength calibration
  • Calibration approach
  • Determination of the anchor positions
  • Determination of the dispersion
  • Details for each grism mode
  • Summary of wavelength accuracy (2014 update)
  • The Zemax optical model
  • Relation to the 2005-2007 calibration
• Coincidence loss in the UVOT
  • Coincidence loss theory
  • Determination from observations
  • Figure 1: observed and predicted rates
  • The coincidence loss area
  • Figures 2,3,4: observed and predicted rates for the other detector modes
• The effective area of the grisms
• 2017 update of the Flux calibration of the UVOT grisms
  • UV Clocked Grism

• Verification of the Swift UVOT Grism Flux Calibration (2013)

Software

• UVOTPY: The Swift UVOT Grism Python Software
  • Users Guide
    • UVOTPY News
    • Getting started
    • Getting a quick spectrum with default parameter settings
    • Basics of UVOT Grism analysis
    • Guide for advanced processing of the grism spectra
    • Lexicon
  • UVOTPY API
    • API Documentation

• note on the original calibration with the target at the default detector position
• guide to reducing grism data using the original uvotpy ftool This method is deprecated, since the flux calibration does not correct for coincidence.

Examples of UVOT grism spectra

• Swift UVOT Spectra of SN2012AW
• GRB 130427A Swift UVOT uv grism spectrum: the deconvolution of smearing from attitude loss

Indices and tables

• Index
• Search Page
• Lexicon

.

-o-