Tycho_NW
Tycho s SNR is one of the best studied Type Ia remnants in the sky, yet there remains much we do not know, such as ion temperatures of the ejecta species, abundances of rare elements like Cr and Mn (sensitive discriminators of the progenitor model), and the doppler velocities of elements beyond Si. We propose here for observations of both the center of the remnant and the SE Fe-rich knot for 75 ks each as a minimal observation goal. Ideally, we would map the remnant with a series of pointings, determining the spatial distribution of the ion temperature for various elements, and go even deeper on the Fe-rich knot in the SE to pull out any faint features.
obsid = 000160000 / Unique Observation/Sequence Number
object = Tycho_NW / Object name
pi_name = Collaboration XRISM / Proposal Principal Investigator Name
ra = 6.23264215644457 / Right Ascension (Pointing Position) (deg)
dec = 64.16759364703 / Declination (Pointing Position) (deg)
roll_angle = 226.366844671185 / Roll Angle (deg)
start_time = 2024-02-02T08:17:04 / Start Time of the Observation
stop_time = 2024-02-05T22:44:04 / Stop Time of the Observation
exposure = 217862.6549815 / Effective Total Observation Exposure (s)
public_date= 2025-08-31 / Public Date