# # Program information file # PROGRAM_ID 2024A987 PROGRAM_TITLE SpeX Spectroscopy of Extragalactic Transients PROGRAM_INV1 Willem Hoogendam PROGRAM_INV2 PROGRAM_INV3 PROGRAM_INV4 PROGRAM_INV5 PROGRAM_SCICAT extra-galactic PROGRAM_ABSTRACT_BEG We seek NIR follow-up of the following particularly interesting transients. 3C-273 is the first identified quasar, and it is undergoing an incredible dimming event where it is no longer the brightest QSO in the sky. We want to monitor 3C-273 in the NIR using SXD to see if NIR features change during this dimming. This could be part of the 'changing-look' AGN phenomenon. Previous IRTF NIR spectra show slight variations compared to archival, but nothing major. Having more IRTF observations will help us compare to a good baseline from the start of the dimming. SN 2023wrk is a nearby 2003fg-like SN Ia, which is posited to collide and interact with C-rich CSM. Previous IRTF time has detected a narrow C I feature post-peak, and we wish to study the evolution of this narrow C I from colliding ejecta with the C-rich CSM. SN 2023ixf is the nearest type II SN in a decade, and we would like to get a NIR time series to synergize with an upcoming JWST observation in May. Likewise, SN 2024ahv is a nearby stripped-envelope SN with an upcoming JWST observation in March. We plan to use the SpeX/SXD mode. PROGRAM_ABSTRACT_END