ASTROSAT CZTI

Data Quality Report

Orbit 58676

Creation date: 2026-08-02T14:05:00.622425
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_004T06_9000006594_58676cztM0_level2.fits modeM0/AS1A14_004T06_9000006594_58676cztM0_level2_quad_clean.evt
Size (bytes)463,714,560108,267,840
Size442.2 MB 103.3 MB
Events in quadrant A4,468,062675,210
Events in quadrant B4,741,002726,962
Events in quadrant C3,499,669701,674
Events in quadrant D3,872,090651,895

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01878013
B01950528
C01603814
D01703210

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01540
B01540
C01540
D01540

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A040
B040
C040
D050

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A75094686.232521%
B75095297.044879%
C7510390.519308%
D75101261.677763%

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 7788 7515 388 388 4.98% 5.16%
B 7788 7515 224 224 2.88% 2.98%
C 7788 7515 25 25 0.32% 0.33%
D 7787 7513 86 86 1.10% 1.14%

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 10 17 1043626 5340.1 786 765 195.3
A 10 251 240889 1229.58 786 765 195.3
A 0 24 59489 300.7 786 765 195.3
B 5 172 1158867 6857.1 785 756 168.9
B 6 255 115454 679.12 785 756 168.9
B 0 186 92006 540.29 785 756 168.9
C 14 254 85710 381.72 809 803 222.4
C 12 249 84312 375.44 809 803 222.4
C 3 30 65372 290.29 809 803 222.4
D 1 27 438558 1925.93 800 763 227.3
D 8 240 70350 306.12 800 763 227.3
D 12 128 60734 263.82 800 763 227.3

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