Difference: 2022PabloDrakeResearchJournal (12 vs. 13)

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Pablo Drake Research Journal (Summer '22)

06/06-06/10

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  06/27
  • Carried out several of the analysis suggested by Qi and Massimo. For example, I tried carrying out 3-month timebins and 5-month timebins, and also a series of 1-day bins for the week around the May 2022 flare. None of these solutions had any effect, with the problem persisting.
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06/28 and 06/29
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06/28 and 06/29
 
  • Carried out several analysis with an increased ROI, up to 40 degrees. Tried several combinations of ROI radius and time bins, to no avail.
  • Read Variability and Spectral Characteristics of Three Flaring Gamma-ray Quasars Observed by VERITAS and Fermi-LAT by C. B. Adams (https://iopscience.iop.org/article/10.3847/1538-4357/ac32bd). Wrote a set of notes on it.
06/30
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  • In conversation with Dr. Brill, he directed me to the following github issue: https://github.com/fermiPy/fermipy/issues/468, which explains that the fitting problem is caused by an incompatibility between Fermipy and the newest version of Astropy. This seems to be a recurring problem having to do with the timing of fermipy and astropy updates (in this case, the problem had to do with fermipy v.1.1). As a solution, we decided to update fermipy again to its v1.4 (which had only been released two weeks before).
  • We started following Prof. Valverde's instructions on how to directly carry out the ROI analysis and the lightcurve analysis only with fermitools. She had sent a txt file named complete_unbinned_analysis.txt, which can be found at /nevis/milne/files/pd2629/fermitools/, with detailed instructions, that I had to adapt to my source.
07/08
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  • After updating the fermipy version in the server, the previous error resolved. I set out then to carry out a lightcurve of the full dataset, in order to gain a general understanding of the development of the flux from the source. I decided to set the timebin size to 2 months, resulting in more than 100 different measurements. In order to carry out that analysis in an orderly manner, I used Ari Brill's pipeline, using the sections method. This is a quite useful pipeline, although Dr. Brill warned me in his emails that it can be quickly outdated, due to the constant updating of Fermipy. From what I have been able to see, the pipeline doesn't present any troubles right now.

07/11-07/15

 
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07/11

Brookhaven Laboratory Visit

07/12

  • Completed the whole dataset analysis. I then turned into the problem of defining flaring states,
 -- Massimo Capasso - 2022-06-16

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