ASTROSAT CZTI

Data Quality Report

Orbit 20200321_A07_118T01_9000003586_level2

Creation date: 2025-12-10T07:01:51.544200
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/AS1A07_118T01_9000003586cztM0_level2.fits modeM0/AS1A07_118T01_9000003586cztM0_level2_quad_clean.evt
Size (bytes)2,255,621,7601,922,731,200
Size2.1 GB 1.8 GB
Events in quadrant A14,000,83211,185,928
Events in quadrant B13,453,01811,320,305
Events in quadrant C13,698,30210,629,206
Events in quadrant D11,690,0369,630,836

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A04841280
B04986010
C05131310
D06783420

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A045980
B046040
C046020
D046040

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03660
B03660
C03660
D03660

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A22570537101.643739%
B22570355482.458098%
C22571756052.483198%
D225727158367.015554%

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 273987 225725 0 0 0.00% 0.00%
B 273987 225720 0 0 0.00% 0.00%
C 273987 225740 0 0 0.00% 0.00%
D 273987 225412 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 13407 11.26 3645 3425 886.2
A 7 110 11040 8.59 3645 3425 886.2
A 9 19 10538 8.03 3645 3425 886.2
B 2 9 10880 10.75 3555 3387 696.9
B 2 8 9005 8.06 3555 3387 696.9
B 3 80 8819 7.79 3555 3387 696.9
C 12 241 9691 6.93 3622 3396 908.0
C 9 233 9119 6.3 3622 3396 908.0
C 3 187 9095 6.28 3622 3396 908.0
D 3 14 8487 6.21 3336 3042 876.7
D 6 231 8290 5.99 3336 3042 876.7
D 10 189 8228 5.91 3336 3042 876.7

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