text:   transition: A reflection spectroscopic study with GX 339-4",8,"['Holiday special!\nNew paper out – <LINK>! This is a paper that I started working on during my undergrad @CaltechSURF project with @jaj_garcia, which later grew on to become a wonderful collaboration with @vicgrinberg, Jack Steiner, Riley Connors among others (1/8)', 'In this paper, we investigate the evolution of certain properties of black hole accretion disk/corona viz., inner disk radius, ionization parameter, temperatures of—inner disk, corona, and its optical depth, etc., across the bright hard to soft state transition of GX 339–4 (2/8)', 'By employing a set of relativistic reflection models, we deduce that the inner disk truncation radius approaches R_in~ISCO during the early onset of bright hard state, and the disk inner edge remains small (&lt;9 Gravitational radii) throughout the hard to soft state transition(3/8)', 'We compare the disk properties (mentioned in 2/8) between outbursts with state transitions occurring at *different luminosities*, and find identical evolutionary trends in the disk properties (including R_in~ISCO), with differences seen only in the temp. and optical depth (4/8)', 'By applying a self-consistent Comptonized accretion disk model accounting for the scatter of disk photons by corona, we find R_in~ISCO, using the temperature dependent values of spectral hardening factor—thereby independently confirming our results from reflection analysis (5/8)', 'With the inner disk barely moving towards the black hole during the bright hard to soft state transition, the changes seen in the disk/coronal properties can be attributed\nto factors like coronal compactification, increase in accretion rate, spectral hardening factor, etc. (6/8)', 'In the end, we also establish that for ~Kerr black holes, data from RXTE/PCA along with relxill family of relativistic reflection models is capable of discerning Fe K fluorescent features, narrow enough to being able to constrain disk inner radius as large as R_in~120*ISCO (7/8)', 'For a broader discussion of even more model parameters, and for a detailed analysis procedure with the underlying statistical footing (MCMC), please go through our paper:  https://t.co/Js9xltjc6B. Feel free to share this work, and your questions/comments if any :) (8/8)']",19,12,2199