ASTROSAT CZTI

Data Quality Report

Orbit 57752

Creation date: 2026-06-01T02:09:57.984825
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_083T16_9000006580_57752cztM0_level2.fits modeM0/AS1A14_083T16_9000006580_57752cztM0_level2_quad_clean.evt
Size (bytes)513,728,64093,847,680
Size489.9 MB 89.5 MB
Events in quadrant A3,056,872633,621
Events in quadrant B3,739,639663,587
Events in quadrant C6,325,766555,867
Events in quadrant D5,383,294529,558

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01342
B01340
C01342
D01340

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01382139
B01569953
C023573172
D02061130

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A090
B090
C090
D090

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6580380.577508%
B65831362.065927%
C65736509.888940%
D65855528.382688%

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 7498 6589 24 24 0.32% 0.36%
B 7494 6593 75 75 1.00% 1.14%
C 7498 6583 555 555 7.40% 8.43%
D 7498 6593 592 592 7.90% 8.98%

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 3 128 91372 518.96 700 684 174.8
A 3 17 83299 472.76 700 684 174.8
A 7 160 72023 408.23 700 684 174.8
B 8 128 373696 2534.65 688 662 147.2
B 4 80 162277 1098.12 688 662 147.2
B 10 247 111443 752.72 688 662 147.2
C 9 38 1784120 10039.81 647 640 177.6
C 15 224 1720873 9683.77 647 640 177.6
C 15 208 144432 809.45 647 640 177.6
D 2 153 1944145 10366.24 656 626 187.5
D 2 249 460925 2455.12 656 626 187.5
D 5 32 98663 522.9 656 626 187.5

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