ASTROSAT CZTI

Data Quality Report

Orbit 57771

Creation date: 2026-06-02T07:36:44.759391
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_57771cztM0_level2.fits modeM0/AS1A14_083T16_9000006580_57771cztM0_level2_quad_clean.evt
Size (bytes)472,596,48095,235,840
Size450.7 MB 90.8 MB
Events in quadrant A2,934,274645,974
Events in quadrant B3,456,744686,494
Events in quadrant C7,543,712535,944
Events in quadrant D3,064,498570,899

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01300
B01300
C01300
D01300

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0134243
B0147072
C0268772
D0137832

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0190
B0190
C0200
D0200

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6366240.377003%
B63661482.324851%
C6366113317.797675%
D6366540.848256%

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 7566 6367 4 4 0.05% 0.06%
B 7566 6367 57 57 0.75% 0.90%
C 7566 6367 897 897 11.86% 14.09%
D 7566 6367 32 32 0.42% 0.50%

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 224276 1311.54 688 672 170.5
A 4 236 16173 90.92 688 672 170.5
A 8 6 15213 85.29 688 672 170.5
B 10 16 298240 2089.29 680 655 142.4
B 4 80 210457 1472.98 680 655 142.4
B 4 171 66354 461.26 680 655 142.4
C 15 224 2480014 14419.39 631 626 171.9
C 9 38 1966913 11435.35 631 626 171.9
C 12 249 432037 2508.96 631 626 171.9
D 3 12 126068 673.41 661 631 186.3
D 2 153 63459 337.29 661 631 186.3
D 2 249 47888 253.7 661 631 186.3

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