ASTROSAT CZTI

Data Quality Report

Orbit 20211215_T04_076T01_9000004810_level2

Creation date: 2025-12-30T21:13:03.129683
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)493,162,560448,084,800
Size470.3 MB 427.3 MB
Events in quadrant A3,101,6982,695,896
Events in quadrant B2,817,8162,603,649
Events in quadrant C3,045,7582,592,456
Events in quadrant D2,517,7582,227,573

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A010260
B010260
C010260
D010260

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02100
B02100
C02100
D02100

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01091880
B01545290
C01155860
D01725290

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A502663620.720169%
B50266527410.492182%
C502666331.259301%
D5026640448.045200%

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 70048 50257 0 0 0.00% 0.00%
B 70048 50191 0 0 0.00% 0.00%
C 70048 50258 0 0 0.00% 0.00%
D 70048 50219 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 7 110 2484 8.62 810 762 199.8
A 0 29 2456 8.48 810 762 199.8
A 9 19 2416 8.28 810 762 199.8
B 2 9 2375 11.2 748 715 148.3
B 3 80 2286 10.6 748 715 148.3
B 5 128 1923 8.15 748 715 148.3
C 3 202 2282 7.47 806 762 203.5
C 3 203 2260 7.36 806 762 203.5
C 3 187 2085 6.5 806 762 203.5
D 4 160 1863 6.25 722 662 192.1
D 7 3 1849 6.18 722 662 192.1
D 10 113 1813 5.99 722 662 192.1

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