ASTROSAT CZTI

Data Quality Report

Orbit 59291

Creation date: 2026-09-12T14:30:19.956793
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_021T06_9000006606_59291cztM0_level2.fits modeM0/AS1A14_021T06_9000006606_59291cztM0_level2_quad_clean.evt
Size (bytes)766,863,36067,443,840
Size731.3 MB 64.3 MB
Events in quadrant A3,392,792552,197
Events in quadrant B4,257,761585,297
Events in quadrant C7,349,740398,184
Events in quadrant D12,922,32588,499

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0146601
B0168261
C0260621
D0425185

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01200
B01200
C01200
D01200

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A59762333.898929%
B59765118.550870%
C5976173829.082999%
D5976510185.358099%

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 5991 5977 160 160 2.67% 2.68%
B 5991 5977 320 320 5.34% 5.35%
C 5991 5977 1485 1485 24.79% 24.85%
D 5991 5977 4445 4445 74.19% 74.37%

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 64 475987 3047.46 633 617 156.0
A 10 251 210942 1348.33 633 617 156.0
A 14 238 183109 1169.9 633 617 156.0
B 4 236 885251 6616.52 622 600 133.7
B 5 185 281018 2097.31 622 600 133.7
B 4 201 162868 1213.64 622 600 133.7
C 15 198 4982430 34085.2 530 524 146.2
C 12 252 110648 753.45 530 524 146.2
C 7 64 64446 437.34 530 524 146.2
D 12 110 10465015 89410.53 404 384 117.0
D 11 129 502503 4290.14 404 384 117.0
D 12 2 236437 2016.85 404 384 117.0

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

TCT plots

Parameter TCT0 TCT_healed
Tct