HRCMODE Operations Database Element

Description

The HRCMODE ODE is a table used by the OFLS to configure the HRC based on the value of the SI_MODE parameter on the ORs for HRC observations. This table then provides an easy way to temporarily change the instrument configuration for a single observation. The table below lists the elements in a row of the HRCMODE table and the current default setting for HRC-I or HRC-S observations.

ParameterRangeHRC-I DefaultHRC-S Default
TRIGGER_LEVEL0-25588
RANGE_SWITCH_LEVEL0-255115125
SPECT_MODENORMAL | IMAGINGNORMALNORMAL
ANTICO_ENABLEYES | NOYESNO
WIDTH_ENABLEYES | NONONO
WIDTH_THESHOLD0-25522
ULD_ENABLEYES | NONONO
UPPER_LEVEL_DISC0-255255255
BLANK_ENABLENONE | CENTER | EDGENONEEDGE
U_BLANK_HI0-25525574
V_BLANK_HI0-255255255
U_BLANK_LOW0-255069
V_BLANK_LOW0-25500
PY_SHUTTER_POSITION_LSB0-25500
PY_SHUTTER_POSITION_MSB0-25500
MY_SHUTTER_POSITION_LSB0-25500
MY_SHUTTER_POSITION_MSB0-25500

Brief descriptions of each of these items follows:

History of Default Value Changes

DateChange
1999-09-02 ANTICO_ENABLE for HRC-I from NO to YES
1999-10-21 BLANK_ENABLE for HRC-S from NONE to EDGE
U_BLANK_HI for HRC-S from 255 to 74
U_BLANK_LOW for HRC-S from 0 to 69
1999-12-06 RANGE_SWITCH_LEVEL for HRC-I from 90 to 115
for HRC-S from 90 to 125
2000-10-05 WIDTH_THRESHOLD for HRC-I from 3 to 2
for HRC-S from 3 to 2

Defined HRCMODEs

The following table describes the currently defined HRCMODE ODE entries

Mode MnemonicDescription
DEFAULTDefault set-up; used if no mode is explicitly given.
ANTICOVTEnable on-board anticoincidence shield vetoing
S_TIMING HRCMODE used with HRC-S for high-precision timing observations. Set TRIGGER_LEVEL to 21, set SPECT_MODE to IMAGING, and disable Edge/Center-blanking and set blanking region to U:0-255, V:0-255
SZEROBLKMove shutters to block the LETG zero order on the HRC-S
SCENTERSet up edge blanking on the HRC-S to send only the events on the center MCP segment (coarse V 65-127)
SNWINGSet up edge blanking on the HRC-S to send only the events on the -Y MCP segment (coarse V 128-255)
SPWINGSet up edge blanking on the HRC-S to send only the events on the +Y MCP segment (coarse V 0-64)
SLETGNSet up edge blanking on the HRC-S to send only the events in a strip along the LETG dispersion direction centered on the nominal aim-point (coarse U 5-10: U_BLANK_LOW=69 U_BLANK_HI=74)
This is currently equivalent to the HRC-S default set-up
SLETGLSet up edge blanking on the HRC-S to send only the events in a strip along the LETG dispersion direction centered on the LESF aim-point (coarse U 9 and up: U_BLANK_LOW=73 U_BLANK_HI=255)
IQUAD1Move shutters to define quadrant 1 of the HRC-I focus tests
IQUAD2Move shutters to define quadrant 2 of the HRC-I focus tests
IQUAD3Move shutters to define quadrant 3 of the HRC-I focus tests
IQUAD4Move shutters to define quadrant 4 of the HRC-I focus tests
SQUAD1Move shutters to define quadrant 1 of the HRC-S focus tests
SQUAD2Move shutters to define quadrant 2 of the HRC-S focus tests
SQUAD3Move shutters to define quadrant 3 of the HRC-S focus tests
SQUAD4Move shutters to define quadrant 4 of the HRC-S focus tests
IQSIM1Move shutters to define quadrant 1 of the SIM tilt test
IQSIM2Move shutters to define quadrant 2 of the SIM tilt test
IQSIM3Move shutters to define quadrant 3 of the SIM tilt test
IQSIM4Move shutters to define quadrant 4 of the SIM tilt test
RS_125Set RANGE_SWITCH_LEVEL to 125
RS_115Set RANGE_SWITCH_LEVEL to 115
SN_RS125Combination of SNWING and RS_125
OBS00590Special configuration for a series of HRC-S/LETG comet observations (coarse u 4-12, coarse v 0-255)
OBS00758Special configuration for OBSID 758 (coarse u 5-12, coarse v 95-102)
OBS00759Special configuration for OBSID 759 (coarse u 5-12, coarse v 46-151)
NOVETODisable on-board anticoincidence shield vetoing
ILLDDisable on-board anticoincidence shield vetoing and set TRIGGER_LEVEL to 64
NOBLANKDisable Edge/Center-blanking and set blanking region to U:0-255, V:0-255
SLLDSet TRIGGER_LEVEL to 21 and disable Edge/Center-blanking and set blanking region to U:0-255, V:0-255
SLLD2Set TRIGGER_LEVEL to 48 and disable Edge/Center-blanking and set blanking region to U:0-255, V:0-255
SIMGSet SPECT_MODE to IMAGING and disable Edge/Center-blanking and set blanking region to U:0-255, V:0-255
SIMGLLD1Set TRIGGER_LEVEL to 21, set SPECT_MODE to IMAGING, and disable Edge/Center-blanking and set blanking region to U:0-255, V:0-255
SIMGLLD2Set TRIGGER_LEVEL to 48, set SPECT_MODE to IMAGING, and disable Edge/Center-blanking and set blanking region to U:0-255, V:0-255
OBS04286Special configuration for OBSID 4286, HRC-I off-axis, next-in-line observation of RXJ1856.5-3754 (edge-blank: coarse u 25-34, coarse v 25-34)
OBS04356Special configuration for OBSID 4356, HRC-I off-axis, next-in-line observation of RXJ1856.5-3754 (edge-blank: coarse u 36-45, coarse v 7-16)
OBS03831Special configuration for OBSID 3831, HRC-S high-precision timing with the shutters positioned to block ~3/4 of the photons from an on-axis source
OBS04411Special configuration for OBSID 4411, HRC-I off-axis, next-in-line observation of RXJ1856.5-3754 (edge-blank: coarse u 6-15, coarse v 37-46)
OBS06094Special configuration for OBSID 6094, HRC-I off-axis, next-in-line observation of RXJ1856.5-3754 (edge-blank: coarse u 13-20, coarse v 13-20)
OBS06095Special configuration for OBSID 6095, HRC-I off-axis, next-in-line observation of RXJ1856.5-3754 (edge-blank: coarse u 34-47, coarse v 35-48)
OBS09715Special configuration for OBSID 9715, HRC-I off-axis, next-in-line observation of 31 Com (edge-blank: coarse u 14-19, coarse v 14-19)
OBS12203Special configuration for OBSID 12203, reduced-width spectroscopy strip using only the center segment (edge-blank: coarse u 6-9, coarse v 65-127)
OBS12229Special configuration for Crab pulsar pathfinder
OBS13121Special configuration for second Crab pulsar pathfinder
OBS11245Special configuration for OBSID 11245, Crab pulsar using elevated trigger level to obtain high-precision timing
OBS17377Special configuration for OBSID 17377, HRC-I off-axis, next-in-line observation of ProxCen (edge-blank: coarse u 26-33, coarse v 26-33)
OBS20734Special configuration for OBSID 20734, HRC-I on-axis, faint source. SIMODE is designed to reduce telemetered background by 11%. (edge-blank: coarse u 5-55, coarse v 5-55)


Dr, Dan Patnaude
Harvard-Smithsonian Center for Astrophysics
60 Garden Street, Mail Stop 03
Cambridge, MA 02138, USA
Ph.: (617) 496-2087
Fax: (617) 495-7356
E-mail: dpatnaude@cfa.harvard.edu