A sharper view of Pal 5's tails: Discovery of stream perturbations with a novel non-parametric technique

Here we release some data on the Pal 5 stellar stream from the  arXiv:1609.01282 paper.

 The file pal5_measurements.fits stores the Pal 5 stream measurements , as shown on Figure 5 of the paper, with the following columns

• phi1 Angle along the stream in degrees ( the coordinate system is  defined in the paper)
• phi2 Angle across the stream in degrees
• sbstream Central surface brightness of the stream in stars per square arcmin
• ldens Linear density of the stream in stars/arcmin
• cumdens Cumulative density of the (leading/trailing) tail from the progenitor
• width Gaussian sigma of the stream in degrees
• bgdens density of background stars

The columns with _16, _50, _84 appended to their name refer to the 16%, 50% 84% percentiles inferred from the posterior samples.

We also provide the MCMC chains that could be used to measure the covariance matrices of different parameters:

The chains are stored in the fits file with the columns

phi2_i, logI_j, logSig_j, logB0_j, logB1_j referring to the stream track values at the nodes, log of  stream surface brightness, log of stream width, log of the background density and log of background density slope (see paper for more details).