ASTROSAT CZTI

Data Quality Report

Orbit 20180430_A04_075T05_9000002066_level2

Creation date: 2025-11-22T03:11:50.983200
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/AS1A04_075T05_9000002066cztM0_level2.fits modeM0/AS1A04_075T05_9000002066cztM0_level2_quad_clean.evt
Size (bytes)125,328,96093,643,200
Size119.5 MB 89.3 MB
Events in quadrant A776,938516,628
Events in quadrant B742,486515,555
Events in quadrant C755,716491,820
Events in quadrant D635,372425,749

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0300
B0300
C0300
D0300

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02600
B02600
C02600
D02600

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0271670
B0283290
C0271150
D0393020

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A128071260.983837%
B128071581.233700%
C12807730.570001%
D128077846.121652%

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 15061 12806 0 0 0.00% 0.00%
B 15061 12806 0 0 0.00% 0.00%
C 15061 12805 0 0 0.00% 0.00%
D 15061 12801 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 29 702 10.02 201 189 51.2
A 7 110 656 9.12 201 189 51.2
A 14 79 574 7.52 201 189 51.2
B 2 9 636 10.98 196 187 40.9
B 5 128 535 8.51 196 187 40.9
B 14 254 489 7.39 196 187 40.9
C 1 81 527 6.38 199 186 53.5
C 12 241 505 5.97 199 186 53.5
C 7 233 502 5.91 199 186 53.5
D 10 189 459 5.87 181 165 50.1
D 6 231 459 5.87 181 165 50.1
D 3 14 449 5.67 181 165 50.1

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