Circinus_X-1
The peculiar X-ray binary Circinus X-1 hosts a weakly magnetized neutron star and B5-A0 supergiant. Discovery of a natal supernova remnant makes Circinus X-1 the youngest X-ray binary hosting a neutron star in our Galaxy. Around the periastron passage, different types of X-ray flares, originating from disk or wind accretion, have been found with rich Fe-line structures, P-Cygni, emission, absorption, and edge features. XRISM provides accretion geometry and stellar wind information of this new-born peculiar binary.
obsid = 300028010 / Unique Observation/Sequence Number
object = Circinus_X-1 / Object name
pi_name = Collaboration XRISM / Proposal Principal Investigator Name
ra = 230.17057153652 / Right Ascension (Pointing Position) (deg)
dec = -57.1664748851418 / Declination (Pointing Position) (deg)
roll_angle = 103.993381183015 / Roll Angle (deg)
start_time = 2024-02-15T06:19:04 / Start Time of the Observation
stop_time = 2024-02-16T00:51:04 / Stop Time of the Observation
exposure = 34905.683006135 / Effective Total Observation Exposure (s)
public_date= 2025-08-31 / Public Date