RADIO_ARC
The most characteristic spectral features of the Galactic center are bright fluorescence X-rays at 6.4 keV emitted from neutral Fe atoms in molecular clouds. Photoionization by X-rays from Sagittarius A* has been considered as its origin (the XRNe scenario). On the other hand, the Galactic center should have a high density of low-energy cosmic rays (CRs), and thus there is still a strong possibility that the neutral Fe line is due to CR bombardment. In this observation, we will explore new spectral features that could never be observed by X-ray CCD energy resolutions, and measure neutral emission lines from other elements so that we will quantitatively clarify the ratio of the XRNe and CR origins.
obsid = 201052010 / Unique Observation/Sequence Number
object = RADIO_ARC / Object name
pi_name = NOBUKAWA KUMIKO / Proposal Principal Investigator Name
ra = 266.596274365475 / Right Ascension (Pointing Position) (deg)
dec = -28.8956773631294 / Declination (Pointing Position) (deg)
roll_angle = 80.0005030676141 / Roll Angle (deg)
start_time = 2025-03-16T16:01:04 / Start Time of the Observation
stop_time = 2025-03-19T17:46:04 / Stop Time of the Observation
exposure = 119813.21672 / Effective Total Observation Exposure (s)
public_date= 2026-04-05 / Public Date