TYCHO_SE
We propose for one 80 ks XRISM Resolve observation of the SE region of Tycho's SNR. This observation will bring XRISM's coverage of Tycho's SNR to nearly 100%, enabling astronomers to measure Doppler shifts and line widths to obtain constraints on 3D ejecta kinematics across the entirety of the SNR. By comparing ejecta velocities, abundance measurements, and thermal properties across the remnant---particularly those in the SE, a region thaw has a notably distinct morphology as well as two ejecta-rich knots---to the predictions of supernova simulations, we will be able to fully understand the dense material surrounding SNR and place constraints on the wind from the progenitor system.
obsid = 203084010 / Unique Observation/Sequence Number
object = TYCHO_SE / Object name
pi_name = HOLLAND-ASHFORD TYLER / Proposal Principal Investigator Name
ra = 6.44874087006865 / Right Ascension (Pointing Position) (deg)
dec = 64.115052352878 / Declination (Pointing Position) (deg)
roll_angle = 39.3779032690517 / Roll Angle (deg)
start_time = 2026-08-12T03:11:04 / Start Time of the Observation
stop_time = 2026-08-14T12:10:04 / Stop Time of the Observation
exposure = 113766.83056 / Effective Total Observation Exposure (s)
public_date= 2099-12-31 / Public Date