WARPS, WINDS, AND REFLECTION IN THE BLACK HOLE CYGNUS X-1
Cygnus X-1 is the archetype stellar-mass black hole. It is persistent, and bright (0.25-0.75~Crab in soft X-rays), making it a popular testing ground for accretion flow models of all types. Among many other potential tests, observations with Resolve can reveal a warped disk, test models of binary evolution, and discover whether or not winds are launched from small disks in wind-fed systems. Studies related to the massive, 09.7 Iab supergiant companion wind in Cygnus X-1 are not the focus of this proposal, but issues central to massive stars can also be explored with Resolve. Apart from addressing important science, Cygnus X-1 is an important PV-phase test case for bright sources that will inform similar observations in normal mission cycles.
TELESCOP= 'XRISM ' / Mission name INSTRUME= 'RESOLVE ' / Instrument name FILTER = 'ND ' / Filter name used OBS_ID = '300049010' / Observation identification string OBJECT = 'CYGNUS_X-1' / Object name OBSERVER= 'XRISM Collaboration' / PI name OBS_MODE= 'POINTING' / POINTING or SLEW or ALL RA_OBJ = 299.59033 / [deg] Object Right ascension DEC_OBJ = 35.20161 / [deg] Object Declination RA_PNT = 299.584715855641 / Pointing RA DEC_PNT = 35.2006789851191 / Pointing DEC RA_NOM = 299.589682783352 / [deg] Nominal aspect point R.A. DEC_NOM = 35.2011626714573 / [deg] Nominal aspect point Dec. PA_NOM = 89.7826977545363 / [deg] Nominal aspect point roll. TELAPSE = 237152.026354015 / Elapsed time DATE-OBS= '2024-04-07T17:55:48.973646' / Start date DATE-END= '2024-04-10T11:48:21' / Stop date ONTIME = 125576.00298 / On-source time EXPOSURE= 125576.00298 / Exposure time PROCVER = '03.00.013.009' / Processing script version MKFFF = 'ISAS/JAXA' / Origin of First FITS file ORIGIN = 'GSFC/NASA' / Origin of Processed FITS file SOFTVER = 'Hea_21Aug2024_V6.34_XRISM_21Aug2024_V001' / Version of HEADAS used CALDBVER= 'gen20240315_xtd20240815_rsl20240815' / Version of CALDB used DATE = '2024-09-24T18:48:25' / Date and time this file was created or updated SIB2_VER= / SIB2 version JAXA