ASTROSAT CZTI

Data Quality Report

Orbit 20211217_T04_076T01_9000004810_level2

Creation date: 2025-12-30T21:56:51.841453
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/AS1T04_076T01_9000004810cztM0_level2.fits modeM0/AS1T04_076T01_9000004810cztM0_level2_quad_clean.evt
Size (bytes)2,137,893,1201,913,751,360
Size2.0 GB 1.8 GB
Events in quadrant A10,936,1509,068,502
Events in quadrant B12,818,81411,337,851
Events in quadrant C13,658,83011,530,617
Events in quadrant D11,610,84610,333,587

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A046680
B046680
C046680
D046680

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A08510
B08510
C08510
D08510

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A08178090
B06459450
C05890570
D06896240

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A2290176087126.579250%
B229017177857.765799%
C22901738491.680661%
D22901775213.284036%

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 313491 203274 0 0 0.00% 0.00%
B 313492 228739 0 0 0.00% 0.00%
C 313491 228974 0 0 0.00% 0.00%
D 313491 228790 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 9 19 9000 9.14 2853 2684 690.9
A 7 110 8769 8.81 2853 2684 690.9
A 0 29 8733 8.75 2853 2684 690.9
B 2 9 11016 11.65 3403 3249 666.5
B 3 80 9959 10.07 3403 3249 666.5
B 2 8 8928 8.52 3403 3249 666.5
C 1 81 11182 8.61 3611 3405 903.2
C 1 80 10972 8.38 3611 3405 903.2
C 3 202 10405 7.75 3611 3405 903.2
D 7 3 8494 6.16 3340 3051 882.9
D 4 160 8463 6.13 3340 3051 882.9
D 10 113 8345 6.0 3340 3051 882.9

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