ASTROSAT CZTI

Data Quality Report

Orbit 57258

Creation date: 2026-04-28T20:24:52.688178
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_049T03_9000006570_57258cztM0_level2.fits modeM0/AS1A14_049T03_9000006570_57258cztM0_level2_quad_clean.evt
Size (bytes)398,793,60087,978,240
Size380.3 MB 83.9 MB
Events in quadrant A2,877,352581,551
Events in quadrant B3,228,932607,290
Events in quadrant C5,046,323522,812
Events in quadrant D3,129,153521,297

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0130681
B0140921
C0193921
D0137491

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A090
B090
C090
D090

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01260
B01260
C01260
D01260

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6169330.534933%
B61691863.015075%
C61685048.171206%
D6169671.086076%

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 7094 6169 3 3 0.04% 0.05%
B 7094 6169 133 133 1.87% 2.16%
C 7093 6168 449 449 6.33% 7.28%
D 7094 6169 53 53 0.75% 0.86%

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 3 14 119997 739.54 653 637 161.4
A 4 249 114706 706.76 653 637 161.4
A 7 64 97193 598.25 653 637 161.4
B 5 172 381882 2746.47 638 614 138.8
B 10 16 106055 759.55 638 614 138.8
B 7 252 89205 638.17 638 614 138.8
C 15 224 2398348 14351.1 608 601 167.1
C 14 254 210112 1253.97 608 601 167.1
C 14 246 20509 119.15 608 601 167.1
D 2 249 189361 1053.48 630 601 179.2
D 2 120 101832 564.97 630 601 179.2
D 8 240 91345 506.45 630 601 179.2

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