Last Updated: 2019sep03

Project Tanagra

Timing Analysis of Grating Data
| Introduction | Targets | Analysis | References |

Enter chorus

Introduction: A number of strong coronal sources have been observed with the Chandra gratings. In addition to high spectral resolution analysis, these sources can also be analyzed for their time variability.

We are carrying out a comprehensive program to analyze the temporal signatures of these sources. We plan to measure the magnitude and character of their variability, characterize their flare number distributions, and analyze the differences in behavior at different plasma temperatures, as detectable in specific spectral lines.

Homer, inspecting the Achaeans

Catalog of Cool Stars Observed with Chandra HETGS or LETGS
Name SpTyp Notes


List of Chandra Observations
Name ObsID Date Exposure

The finches, their beaks


Light curves

Spectro-temporal Variability





Kashyap, V., Drake, J., Wargelin, B., Smith, R., & Foster, A., 2016, Cool Stars 19, Spectrum Ultimum Capellae
Poster [.pdf]
Kashyap, V., Drake, J., Smith, R., & Wargelin, B., 2014, 15 Years of Science with Chandra Symposium, Spectrum Ultimum Capellae: XV Years of Chandra Observations of Capella
Poster [.pdf]
Kashyap, V.L., Connors, A., Drake, J., Lee, T., Posson-Brown, J., Saar, S., Scargle, J., van Dyk, D., & Wong, R., 2014, AAS/HEAD 14, 119.05 TANAGRA: Timing Analysis of Grating Data
Poster [.pdf]
Posson-Brown, J., Kashyap, V., Drake, J., Saar, S., & Scargle, J., 2012, Radio Stars & Their Lives in the Galaxy, MIT Haystack Observatory, Project Tanagra: A Spectro-Temporal Stellar Events Database
Poster [.pdf]
Kashyap, V., 2012, ICHASC Workshop, Imperial College, London, Aug 23, 2012, Simultaneous Weak Events
presentation [.pdf]
Posson-Brown, J., Kashyap, V., Saar, S., & Drake, J., 2011, AAS-HEAD, 10.05, Newport RI, Project Tanagra: Stellar Flares in Chandra High-Resolution Spectra
Abstract [@abstractonline]
Poster [.pdf]
Kashyap, V., Posson-Brown, J., Drake, J., Reeves, K., Saar, S., Wong, R., Lee, T., Connors, A., & Scargle, J., 2011, Digging Deeper: Algorithms for Computationally-Limited Searches in Astronomy Conference, Pasadena, CA, Dec 2011, Project Tanagra Timing Analysis of Grating Data
presentation [.pdf]
AR Lac spectro-temporal movie [.mpg]
Posson-Brown, J., Kashyap, V., & Grigis, P., 2011, Hinode 5, 96, Cambridge MA, Detecting Bright Points in Hinode XRT Lightcurves
Poster [.pdf]

Useful References

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Chandra list
| Introduction | Targets | Analysis | References |
This work is supported by CXC NASA Contract NAS8-39073 and Chandra grant AR0-11001X.