I am a professor in the Instituto de Astronomía of the Universidad Nacional Autónoma de México in Mexico City.

I am active in research, instrumentation, teaching, and public outreach.

My current research centers on observational aspects of relativistic stellar transients, especially gamma-ray bursts and gravitational-wave transients.

• The prompt phase and the early afterglow of gamma-ray burst often shows more complex behavior than predicted by simple models. What can this teach us about the central engine that drives the relativistic jet?
• What is the nature of the population of short gamma-ray bursts?
• What is the nature of the population of neutron star mergers detected in gravitational emission by LIGO and Virgo.

In these studies, I typically combine optical and infrared observations with robotic telescopes that I have developed at the Observatorio Astronómico Nacional with observations from satellites, such as Swift and Fermi, and larger telescopes, such as GTC and Gemini.