ASTROSAT CZTI

Data Quality Report

Orbit 20161026_A02_197T05_9000000756_level2

Creation date: 2025-11-07T11:16:13.193517
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/AS1A02_197T05_9000000756cztM0_level2.fits modeM0/AS1A02_197T05_9000000756cztM0_level2_quad_clean.evt
Size (bytes)139,400,640143,651,520
Size132.9 MB 137.0 MB
Events in quadrant A826,574848,434
Events in quadrant B802,144854,519
Events in quadrant C811,466816,967
Events in quadrant D699,372748,315

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0330840
B0330520
C0323960
D0338850

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0110
B0110
C0110
D0110

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03160
B03200
C03210
D03100

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A156962431.548165%
B157131991.266467%
C156731510.963440%
D156652151.372486%

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 17107 16003 0 0 0.00% 0.00%
B 17107 15983 0 0 0.00% 0.00%
C 17107 15989 0 0 0.00% 0.00%
D 17107 15968 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 29 841 11.36 214 199 56.5
A 14 188 822 11.03 214 199 56.5
A 14 204 724 9.29 214 199 56.5
B 2 9 673 10.45 211 200 45.3
B 14 254 557 7.89 211 200 45.3
B 3 17 535 7.4 211 200 45.3
C 12 241 611 6.98 214 198 59.2
C 1 80 589 6.61 214 198 59.2
C 1 81 562 6.15 214 198 59.2
D 11 82 528 6.18 199 180 56.3
D 7 5 524 6.11 199 180 56.3
D 3 14 519 6.02 199 180 56.3

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