ASTROSAT CZTI

Data Quality Report

Orbit 55740

Creation date: 2026-01-16T18:21:35.637830
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/AS1A14_099T04_9000006540_55740cztM0_level2.fits modeM0/AS1A14_099T04_9000006540_55740cztM0_level2_quad_clean.evt
Size (bytes)1,014,724,80077,008,320
Size967.7 MB 73.4 MB
Events in quadrant A10,899,797437,919
Events in quadrant B13,700,460240,262
Events in quadrant C5,115,652603,596
Events in quadrant D7,287,972547,045

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0373890
B0457770
C0201070
D0266550

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01440
B01440
C01440
D01440

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A7217289240.072052%
B7217485267.230151%
C72186649.199224%
D7218111515.447492%

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 7217 7217 2214 2214 30.68% 30.68%
B 7217 7217 4498 4498 62.33% 62.33%
C 7218 7218 438 438 6.07% 6.07%
D 7218 7218 818 818 11.33% 11.33%

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 15 32 7470231 46657.68 655 635 160.1
A 8 249 434412 2709.52 655 635 160.1
A 8 192 150803 938.0 655 635 160.1
B 4 206 11889174 122973.87 445 429 96.7
B 0 199 23242 235.97 445 429 96.7
B 12 111 11566 115.2 445 429 96.7
C 15 199 1117786 5612.93 723 715 199.0
C 9 38 856299 4299.04 723 715 199.0
C 6 223 98473 491.2 723 715 199.0
D 11 129 3838660 18908.05 727 696 203.0
D 8 160 323120 1588.45 727 696 203.0
D 13 84 86090 420.7 727 696 203.0

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