tokens: Acknowledgements This work is based upon observations carried out at the OAN SPM, Baja California, Mexico. GT and SZ acknowledge PAPIIT grants IN108316, IN100617 and CONACyT grant 166376. We are grateful to Dr J. V. Hernndez Santisteban for the opportunity to work with the original data of 1RXS J064434.5334451. We thank the daytime and night support staff at the OAN-SPM for facilitating and helping to obtain our observations.
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