ASTROSAT CZTI

Data Quality Report

Orbit 57689

Creation date: 2026-05-27T19:37:25.747325
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_125T09_9000006578_57689cztM0_level2.fits modeM0/AS1A14_125T09_9000006578_57689cztM0_level2_quad_clean.evt
Size (bytes)701,167,68097,951,680
Size668.7 MB 93.4 MB
Events in quadrant A3,664,498690,417
Events in quadrant B4,690,850705,755
Events in quadrant C11,334,667468,773
Events in quadrant D5,704,524597,004

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01440
B01440
C01440
D01440

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0155500
B0190510
C0386800
D0217170

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A7233240.331813%
B72334366.027928%
C7233262936.347297%
D72334035.571685%

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 7233 7233 16 16 0.22% 0.22%
B 7233 7233 264 264 3.65% 3.65%
C 7233 7233 2381 2381 32.92% 32.92%
D 7233 7233 491 491 6.79% 6.79%

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 414040 2171.53 778 757 190.3
A 7 223 66079 343.22 778 757 190.3
A 4 13 49434 255.77 778 757 190.3
B 5 185 1355496 8369.68 755 727 161.9
B 10 247 179887 1106.84 755 727 161.9
B 0 171 38721 234.72 755 727 161.9
C 12 254 7187665 40107.85 661 653 179.2
C 15 224 1242276 6929.0 661 653 179.2
C 12 2 151030 839.19 661 653 179.2
D 8 160 1219369 5750.84 746 713 211.9
D 8 240 1152527 5435.41 746 713 211.9
D 2 120 97902 458.63 746 713 211.9

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