ASTROSAT CZTI

Data Quality Report

Orbit 57440

Creation date: 2026-05-11T01:31:38.418207
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_102T01_9000006572_57440cztM0_level2.fits modeM0/AS1A14_102T01_9000006572_57440cztM0_level2_quad_clean.evt
Size (bytes)485,565,12097,050,240
Size463.1 MB 92.6 MB
Events in quadrant A3,428,218643,174
Events in quadrant B3,270,204692,594
Events in quadrant C5,130,873586,637
Events in quadrant D5,612,978539,091

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0153461
B0147941
C0201501
D0214943

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A060
B060
C060
D060

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01400
B01400
C01400
D01400

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A68431672.440450%
B68431021.490574%
C68434666.809879%
D68426219.076293%

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 7468 6844 139 139 1.86% 2.03%
B 7468 6844 38 38 0.51% 0.56%
C 7468 6844 383 383 5.13% 5.60%
D 7467 6843 615 615 8.24% 8.99%

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 10 251 564983 3175.27 721 701 177.7
A 3 14 48786 270.58 721 701 177.7
A 4 3 11941 63.25 721 701 177.7
B 4 201 134571 871.62 715 689 153.6
B 4 171 84955 548.6 715 689 153.6
B 0 245 47806 306.75 715 689 153.6
C 15 224 2177553 11808.6 677 670 184.3
C 14 254 86548 465.85 677 670 184.3
C 12 252 51660 276.59 677 670 184.3
D 2 249 999838 5308.06 663 633 188.2
D 15 94 631920 3353.57 663 633 188.2
D 8 240 492515 2613.01 663 633 188.2

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