# # Program information file # PROGRAM_ID 2021A037 PROGRAM_TITLE Coordinated IRTF/SpeX and Subaru/SCExAO observations of Stars with Planet-Building Disks PROGRAM_INV1 Michael Sitko PROGRAM_INV2 Ray Russell PROGRAM_INV3 Kellen Lawson PROGRAM_INV4 John Wisniewski PROGRAM_INV5 Korash Assani PROGRAM_SCICAT stellar PROGRAM_ABSTRACT_BEG New Extreme Adaptive Optics instruments are allowing unprecedented views of the inner regions of planet-building disks and exoprotoplanets as the planets are forming. The SCExAO instrument on the Subaru telescope will has been involved in these observations, which will continued to be carried out in the near future. The interpretation of the near-IR colors will depend on that of the star, often unavailable in these images. We have found that coordinated integrated-light data at these wavelengths can be critical for the their interpretation, especially as these are often variable stars. We have selected 6 systems for observing, the first 2 to be observed in 2021A, if our Subaru proposal is accepted. For the IRTF data, we will use SpeX. We have considerable experience with SpeX, and have even observed one of the stars previously. From the previous data, we know we can get the needed S/N in 90 minutes per observation. We intend to bracket the SCExAO runs with 3 IRTF runs of 90 minutes duration. We have used a similar strategy in the past. PROGRAM_ABSTRACT_END