GRS 1915+105: FROM MICRO-QUASAR TO MICRO-COMPTON-THICK AGN?
After a long period wherein it was the archetype micro-quasar, GRS 1915+105 has spent the last several years in a highly obscured state that evokes Compton- thick AGN like NGC 1068. However, even in its most obscured phases it is an order of magitude brighter than NGC 1068, and it can deliver even deeper insights into accretion and outflows in this universally important mode. We request a 30 ks observation with XRISM to perform line diagnostics that will reveal the relative radial positioning of cold and hot gas components components, whether or not they are bound to the system or escaping, how much mechanical power is being channeled into the flows, and how the flows relate to the large obscuring column density.
TELESCOP= 'XRISM ' / Mission name INSTRUME= 'RESOLVE ' / Instrument name FILTER = 'OPEN ' / Filter name used OBS_ID = '201068010' / Observation identification string OBJECT = 'GRS1915+105' / Object name OBSERVER= 'JON MILLER' / PI name OBS_MODE= 'POINTING' / POINTING or SLEW or ALL RA_OBJ = 288.7982 / [deg] Object Right ascension DEC_OBJ = 10.9458 / [deg] Object Declination RA_PNT = 288.802701812916 / Pointing RA DEC_PNT = 10.9467448809331 / Pointing DEC RA_NOM = 288.798714016321 / [deg] Nominal aspect point R.A. DEC_NOM = 10.9455712135453 / [deg] Nominal aspect point Dec. PA_NOM = 259.88991991094 / [deg] Nominal aspect point roll. TELAPSE = 66651 / Elapsed time DATE-OBS= '2024-10-17T01:40:18' / Start date DATE-END= '2024-10-17T20:11:09' / Stop date ONTIME = 35661 / On-source time EXPOSURE= 35661 / 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 = '2024-10-26T01:58:49' / Date and time this file was created or updated SIB2_VER= 'V03.01 ' / SIB2 version JAXA