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SUZAXISLOG - Suzaku XIS Configuration Log

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Overview

The Suzaku XIS detector units can be configured differently depending on how the user chooses the observation to be carried out. This database table records for each Suzaku observation the different XIS configurations during an observation for all XIS units. The set of parameters that can be configured are: datamode (see also edit mode), window size, on-board window discriminator, on-board grading and event threshold. Each record lists for a given XIS the values set for these parameters in the time interval where they are valid within the observation. Therefore for a given XIS there will be as many records as many different configurations are present within an observation.

Bulletin

The SUZAXISLOG database table was last updated on 26 November 2014.

Provenance

This database table is generated at the Suzaku processing site. During operation, it is updated on daily basis.

Parameters

Name
This is the name given to the pointed target.

RA
The Right Ascension of the pointing position.

Dec
The Declination of the pointing position.

LII
The Galactic Longitude of the pointing position.

BII
The Galactic Latitude of the pointing position.

Roll_Angle
The roll angle of the observation, in degrees.

Time
The start time of the interval for which the XIS parameters recorded in this record are valid.

Stop_Time
The stop time of the interval for which the XIS parameters recorded in this record are valid.

ObsID
The unique observation/sequence number.

Exposure
The effective total exposure time in seconds for this time interval.

Integration_Time
The time resolution of the data.

Xis
String indicating the XIS units. The possible values are xis0, xis1, xis2, and xis3. The xis1 is the front-illuminated units, and the others are back-illuminated.

Datamode
String indicating the data mode in use.

Editmode
String indicating the edit mode in use. The possible values are 2x2, 3x3, and 5x5, and they correspond to the island of pixels centered on the event and telemetered on ground.

Microcode
This gives the code assigned to each datamode. This is a string of three numerical values.

Clk_Mode
String indicating the clock mode in use.

Window_Option
String indicating the window option in use. The possible values are 0=off, 1=1/4, 2=1/8, and 3=1/16.

Window_Start
This gives the start address of the window.

Window_Size
This gives the size of the window.

Psum_Line
The number of lines that are summed when the Psum clock is in use.

Area_Hstart
This gives the start address of the horizontal area discriminator set on board. It consists of a string with four numbers, each corresponding to each individual segment of the CCD (A, B, C, D).

Area_Hstop
This gives the stop address of the horizontal area discriminator set on board. It consists of a string with four numbers each corresponding to each individual segment of the CCD (A, B, C, D).

Area_Vstart
This gives the start address of the vertical area discriminator set on board. It consists of a string with four numbers each corresponding to each individual segment of the CCD (A, B, C, D).

Area_Vstop
This gives the stop address of the vertical area discriminator set on board. It consists of a string with four numbers each corresponding to each individual segment of the CCD (A, B, C, D).

Discr_Type
This indicates the area discriminator type if it is applied outside (set to 0) or inside (set to 1). It consists of a string of four numbers, each corresponding to each individual segment of the CCD (A, B, C, D).

Grade_Telm
There are four types of grade on board: OTHERS, TRAIL, LEAD, SINGLE. This parameters reports a string with four numbers, each indicating if any of these types of grades are sent to the telemetry. The possible values of each number are 0 (indicating the grade type is not sent) or 1 (indicating the grade type is sent). The grade discriminator is used only in the timing mode.

Evtthre_Low
This give the lower-level discriminator applied on-board to events. It consists of a string with four numbers each corresponding to each individual segment of the CCD (A, B, C, D).

Evtthre_Up
This gives the upper-level discriminator applied on-board to events. It consists of a string with four numbers each corresponding to each individual segment of the CCD (A, B, C, D).

Area_Discr
This parameter indicates the area discriminator status for each segment of the CCD. It consists of a string with four numbers each corresponding to each individual segment of the CCD (A, B, C, D). The possible values are 0 for disabled and 1 for enabled.

Grade_Discr
This parameter indicates the grade discriminator status for each segment of the CCD. It consists of a string with four numbers each corresponding to each individual segment of the CCD (A, B, C, D). The values are 0 for disable, 1 enable. The grade discriminator is used only in the timing mode.

Conf_Type
This parameter identifies the specific configuration of the area and grade discriminators and the event threshold. The same string is used in the filename. The value for the standard configuration is 'a'.

Filename
The name of the XIS file that contains the data with the configuration settings described in this record.

Processing_Date
This records the date when the data were processed. If a data set has been processed more than one time, it reports the date of the last processing.

Processing_Version
This records the version of the processing script used in the pipeline to generate the data products for the observation.

Num_Processed
This records the number of times a data set has been processed using the same processing version of the script.

Injection
This is a flag which identifies whether or not the observation was carried out with charge injection in the XIS.


Contact Person

Questions regarding the SUZAXISLOG database table can be addressed to the HEASARC User Hotline.

Page Author: Browse Software Development Team
Last Modified: 12-Sep-2008