Sherpa References
Various Sherpa-related documents are available for download. Some are in HTML format, so they can be viewed directly in your web browser. Others are in PDF and Postscript format, so you must print them or examine them in an external viewer (such as Acrobat Reader or Ghostview).
Sherpa is being used in published science papers:
A list of publications (2001 - January 2017) using Sherpa may be found on SAO/NASA Astrophysics Data System (ADS) .
Citing Sherpa in a Publication
If you are writing a paper and would like to cite Sherpa, we recommend the following:
Sherpa: a mission-independent data analysis
application
(ADS)
P. E. Freeman, S. Doe, A. Siemiginowska
SPIE Proceedings, Vol. 4477, p.76, 2001
\bibitem[Freeman et al.(2001)]{2001SPIE.4477...76F} Freeman, P., Doe, S.,
\& Siemiginowska, A.\ 2001, \procspie, 4477, 76
Further guidelines are available from the Acknowledgment of Use of Chandra Resources.
Presentations
Sherpa
- Sherpa: Modelling, Fitting, and Statistics - CIAO workshop, February 2010
- Advanced Sherpa - CIAO workshop, February 2010
- Scripting in CIAO - CIAO workshop, February 2010
- Modeling, Fitting and Statistics - CIAO workshop, October 2008
- The CIAO 4.0 Data Analysis System - HEAD meeting, 2008
Statistics
- Statistics: Basic Concepts - Int'l X-ray Astronomy School, 2005
- Statistics: Model Hypothesis Testing - Int'l X-ray Astronomy School, 2005
- Statistics in the X-ray Regime - CIAO workshop, May 2002
- Statistics I: Issues in Model Fitting in the X-ray Regime - GSFC X-ray School, 2001
- Statistics II: Model Comparison and Parameter Estimation - GSFC X-ray School, 2001
Documents
Fitting
Statistics
Publications
The publication titles listed below are linked to the article entry in the ADS.
General- Fitting and Estimating Parameter Confidence Limits with Sherpa (SciPy 2011 presentation)
- B. Refsdal, S. Doe, D. Nguyen, A. Siemiginowska, V. Kashyap
- Sherpa: 1D/2D modeling and fitting in Python (SciPy)
- B. Refsdal, S. Doe, D. Nguyen, A. Siemiginowska, N. Bonaventura, D. Burke, I. Evans, J. Evans, A. Fruscione, E. Galle, J. Houck, M. Karovska, N. Lee, M. Nowak,
- Proceedings of the 8th Python in Science conference (SciPy 2009), G. Varoquaux, S. van der Walt, J. Millman (Eds.), pp. 51-57 2009
- Systemization and Use of Atomic Data for Astrophysical Modeling
- Brickhouse, Nancy S.
- 1999, ADASS VIII, ASPC, 172, 25
- Extending and Enhancing the Capabilities of the Sherpa Modeling and Fitting Tool with S-Lang
- Burke, D. J.; Siemiginowska, A.; Doe, S.; Nguyen, D.
- 2005, ADASS XIV, ASPC, 347, 105
- The ASC Fitting Environment
- Doe, S.; Conroy, M.; McDowell, J.
- 1996, ADASS V, ASPC, 101, 155
- Extending Sherpa Data Analysis with S-Lang
- Doe, S.; Freeman, P.; Smith, R.; Burke, D.; Siemiginowska, A.
- 2004, ADASS XIII, ASPC, 314, 404
- Fitting and Modeling of AXAF Data with the ASC Fitting Application
- Doe, S.; Ljungberg, M.; Siemiginowska, A.; Joye, W.
- 1998, ADASS VII, ASPC, 145, 157
- Sherpa: Goals and Design for Chandra and Beyond
- Doe, S., et al.
- 2006, ADASS XV, ASPC, 351, 77
- Developing Sherpa with Python
- Doe, S., et al.
- 2007, ADASS XVI, ASPC, 376, 543
- Fitting and Modeling in the ASC Data Analysis Environment
- Doe, S.; Siemiginowska, A.; Joye, W.; McDowell, J.
- 1997, ADASS VI, ASPC, 125, 492
- Sherpa: a mission-independent data analysis application
- Freeman, Peter; Doe, Stephen; Siemiginowska, Aneta
- Proc. SPIE Vol. 4477
- New Elements of Sherpa, CIAO's Modeling and Fitting Tool
- Freeman, P. E.; Doe, S.; Siemiginowska, A.
- 2001, ADASS X, ASPC, 238, 483
- Optimizing Functions Using ASCFIT
- Grumm, David
- 1999, ADASS VIII, ASPC, 172, 365
- CIAO 4 Preview: Sherpa and ChIPS Demo
- Refsdal, B., et al.
- 2007, ADASS XVI, ASPC, 376, 711
- AXAF Data Analysis Challenges
- Siemiginowska, A.; Elvis, M.; Connors, A.; Freeman, P.; Kashyap, V.; Feigelson, E.
- Statistical Challenges in Modern Astronomy II, 1997 (PS)
General
- Statistical Challenges in Astronomy (amazon.com)
- Feigelson, Eric D.; Babu, G. Jogesh
- Springer-Verlag, 2003
Parameter Estimation and Model Comparison
- Energy Spectra of X-ray Clusters of Galaxies
- Avni, Y.
- 1976, ApJ, 210, 642
- Parameter Estimation in Astronomy through Application of the Likelihood Ratio
- Cash, W.
- 1979, ApJ, 228, 939
- Generation of Confidence Intervals for Model Parameters in X-ray Astronomy
- Cash, W.
- 1976, A&A, 52, 307
- Parameter Estimation in X-ray Astronomy
- Lampton, M.; Margon, B.; Bowyer, S.
- 1976, ApJ, 208, 177
- Analyzing Gamma-ray Burst Spectral Data
- Loredo, Thomas J.; Epstein, Richard I.
- 1989, ApJ, 336, 896
- Chi-squared and C Statistic Minimization for Low Count per Bin Data
- Nousek, John A.; Shue, David R.
- 1989, ApJ, 342, 1207
- Statistics, Handle with Care: Detecting Multiple Model Components with the Likelihood Ratio Test
- Protassov, Rostislav; van Dyk, David A.; Connors, Alanna; Kashyap, Vinay L.; Siemiginowska, Aneta
- 2002, ApJ, 571, 545
- Parameter Estimation in X-ray Astronomy using Maximum Likelihood
- Wachter, K.; Leach, R.; Kellogg, E.
- 1979, ApJ, 230, 274
- The Formal Underpinnings of the Response Functions used in X-Ray Spectral Analysis
- Davis, John E.
- 2001, ApJ, 548, 1010
- The Analysis of X-ray Spectra
- Gorenstein, P.; Gursky, H.; Garmire, G.
- 1968, ApJ, 153, 885
- The Direct Deconvolution of X-ray Spectra
- Kahn, S. M.; Blissett, R. J.
- 1980, ApJ, 238, 417
Manuals
-
The Chandra ABC Guide to Pileup (PS, 23 pages)