ASTROSAT CZTI

Data Quality Report

Orbit 20170406_G07_086T01_9000001142_level2

Creation date: 2025-11-10T13:07:01.048068
Switch to: Orbit-wise | Merged OBSID-wise
web.py, SVN revision $Rev$

Source files: Data quality report (detailed, human readable) | Data quality report (concise, machine readable)

Observation information


Basic statistics of files

Param Original file Final file
FilenamemodeM0/AS1G07_086T01_9000001142cztM0_level2.fits modeM0/AS1G07_086T01_9000001142cztM0_level2_quad_clean.evt
Size (bytes)473,097,600476,311,680
Size451.2 MB 454.2 MB
Events in quadrant A2,855,2702,860,890
Events in quadrant B2,767,9502,861,561
Events in quadrant C2,819,9682,736,024
Events in quadrant D2,446,6982,528,758

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01029180
B01100490
C01024520
D01093140

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A010220
B010200
C010220
D010220

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0810
B0810
C0810
D0810

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A501004300.858283%
B500916831.363518%
C500983590.716595%
D500956601.317497%

Noise dominated fraction

Noise dominated data is calculated using 1-second bins in cleaned event files. If a bin has >2000 counts, and if more than 50% of those come from <1% of pixels, then it is considered to be noise-dominated and hence unusable.

Quadrant # 1 sec bins Bins with >0 counts Bins with >2000 counts High rate bins dominated by noise Noise dominated (total time) Noise dominated (detector-on time) Marked lightcurve
A 58310 50111 0 0 0.00% 0.00%
B 58310 50112 0 0 0.00% 0.00%
C 58310 50111 0 0 0.00% 0.00%
D 58310 50111 0 0 0.00% 0.00%

Top noisy pixels

Top three noisy pixels from each quadrant. If the there are fewer than three noisy pixels in the level2.evt file, extra rows are filled as -1

Pixel properties Quadrant properties
Quadrant DetID PixID Counts Sigma Mean Median Sigma
A 0 29 2693 10.72 742 694 186.5
A 7 110 2319 8.72 742 694 186.5
A 0 30 2085 7.46 742 694 186.5
B 2 9 2373 11.59 729 695 144.8
B 12 226 1871 8.12 729 695 144.8
B 3 17 1851 7.98 729 695 144.8
C 1 81 2098 7.16 744 691 196.6
C 1 80 2077 7.05 744 691 196.6
C 12 241 1923 6.27 744 691 196.6
D 6 231 1793 6.17 697 632 188.1
D 7 3 1783 6.12 697 632 188.1
D 3 14 1769 6.04 697 632 188.1

Detector plane histogram (DPH)

Histogram calculated using DETX and DETY for each event in the final _common_clean file

Quadrant A Quadrant B
Quadrant D Quadrant C

Count rate plots and images

Plot type Count rate plots Images
Comparison with Poisson distribution
Blue bars denote a histogram of data divided into 1 sec bins.
Red curve is a Poisson curve with rate = median count rate of data.
Quadrant-wise count rates
Data is divided into 100 sec bins
Module-wise count rates for Quadrant A
Data is divided into 100 sec bins
Module-wise count rates for Quadrant B
Data is divided into 100 sec bins
Module-wise count rates for Quadrant C
Data is divided into 100 sec bins
Module-wise count rates for Quadrant D
Data is divided into 100 sec bins

Housekeeping plots

Parameter Plot
CZT HV Monitor
D_VDD
Temperature 1
Veto HV Monitor
Veto LLD
Alpha Counter
_CPM_Rate
CZT Counter
+2.5 Volts monitor
+5 Volts monitor
_ROLL_ROT
_Roll_DEC
_Roll_RA
Veto Counter