Detection of substellar companion HD 984 B using 60 min of HiRISE commissioning data. The plot shows the normalized CCF between the HiRISE data on the companion and a BT-Settl model at 2800 K in blue, the CCF between the stellar signal and the same model in gray, and the auto-correlation function of the model in black (see Sect. 5.6 for details). We measure a radial velocity of −28 km s⁻¹ (red dashed line) and a projected rotational velocity υ sin i ~13 kms.