NAME

warmup -- Tabulate dark signal as a function of elapsed time since the last high voltage turn-on (i.e., "warm-up" time).

USAGE

warmup intable outtable

DESCRIPTION

This task examines the dark signal changes caused by the history of high voltage turn-ons. This "warm up" effect is examined in this task by tabulating the observed dark counts against the amount of time since the most recent high voltage turn-on.

Observations are made by using one of the dark apertures (for image dissector tubes (IDTs)) or sky (for the photomultiplier tube (PMT)).

PARAMETERS

intable [file name]

Name of the input table, which contains following columns:

(turnon_key)    The most recent high voltage turn-on time (double).
		The actual column name is passed from the 
		'turnon_key' parameter in number of Julian days
		since the year 1900.0.
(count_key)     Observed count rate (real).  The actual column
		name is passed from the 'count_key' parameter.
(counterr_key)  Standard deviation of the observed count rate
		(real).  The actual column name is passed from
		the 'dcount_key' parameter.
(temp_key)      Temperature (real).  The actual column name is
		passed from the 'temp_key' parameter.
'EPOCH'         Epoch of observation (double).
'VOLTAGE'       High voltage setting (real).
'APERTOBJ'      Object aperture name (char*10).

outtable [file name]

Name of the output table produced by warmup; this table contains the following columns:

(count_key)     Observed count rate (real).  The actual column
		name is passed from the 'count_key' parameter.
(counterr_key)  Standard deviation of the observed count rate
		(real).  The actual column name is passed from
		the 'dcount_key' parameter. 
(temp_key)      Temperature (real). The actual column name is
		passed from the 'temp_key' parameter.
'ELAPSE_TIME'   Elapsed time since the most recent high voltage
                turn-on, in seconds (double).
'EPOCH'         Epoch of observation (double).
'VOLTAGE'       High voltage setting (real).
'APERTOBJ'      Object aperture name (char*10).

(turnon_key = "VHVONTM") [string]

Column name in the input table containing the most recent high voltage turn-on time.

(count_key = "DOBJ") [string]

Column name of the count rate in the input table.

(counterr_key = "DOBJ_ERR") [string]

Column name of the count rate's standard deviation in the input table.

(temp_key = "DET_TEMP") [string]

Column name of the temperature in the input table.

EXAMPLES

1. Tabulate the warm-up effect from the input data table xwarmup$input1 and put results in the output table ywarmup$output. Use default values for all hidden parameters.

hs> warmup "xwarmup$input1" "ywarmup$output"

BUGS

REFERENCES

SEE ALSO