Hi everybody, I hope some of you have worked with pulsars before or other x-ray data from NASA Heasarc. I need some data showing a very precise light curve of the crab pulsar and some other pulsar. It should be something like this: http://cdn.eso.org/images/screen/eso9948i.jpg Where the time is in milliseconds ranging to 200 ms. Or something like this: http://www.jb.man.ac.uk/pulsar/Education/Sounds/0531_seq.mp4 The goal is to see the individual pulses, but hopefully in x-rays instead. Then i should get a related power spectrum to the data, where i can determine the period/which frequency the pulsar pulsates. Something like this graph: http://www.nature.com/nature/journal/v394/n6691/images/394344aa.tif.0.gif I know these data i linked are unrelated, it's just to get an idea of what i'm looking for. I'm quite unexperienced with the software related to HEASARC and i'm not familiar with their data archive or different kind telescopes. I have succeeded by installing the HEASOFT package. But since it is a jungle out there, i hoped some of you could help telling me what to do. Which telescope is capable of measuring so precise, that you can graph the individual pulses on a graph, like with the crab pulsar, which pulsates around 30 times a second. Is it the RXTE? Where should i find the data in the HEASARC archive, and what files should i look for? It doesn't matter if it's pre-processed or finished processed data. I should just be able to determine the pulse period, the change in pulse period (dp), and knowing which telescope and what software used to data processing. Off course i should be able to show the graphs too, and i should know which year/date the data was measured. Or is there no telescope which measure that precise, when it comes to x-ray data, and should i instead be looking for data in the radiowaves.