ASTROSAT CZTI

Data Quality Report

Orbit 56002

Creation date: 2026-02-06T17:04:47.292288
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_066T02_9000006546_56002cztM0_level2.fits modeM0/AS1A14_066T02_9000006546_56002cztM0_level2_quad_clean.evt
Size (bytes)527,112,00098,447,040
Size502.7 MB 93.9 MB
Events in quadrant A6,737,590597,900
Events in quadrant B3,958,183688,289
Events in quadrant C3,215,168631,505
Events in quadrant D5,048,029566,789

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A010
B010
C010
D010

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0250132
B0168151
C0151931
D0201461

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01460
B01460
C01460
D01460

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A712281911.499579%
B71232673.748421%
C7123340.477327%
D71234496.303524%

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 7227 7123 702 702 9.71% 9.86%
B 7228 7124 82 82 1.13% 1.15%
C 7228 7124 26 26 0.36% 0.36%
D 7228 7124 391 391 5.41% 5.49%

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 12 115 2994641 16276.12 744 725 183.9
A 3 14 350477 1901.39 744 725 183.9
A 0 8 326071 1768.71 744 725 183.9
B 2 249 576338 3472.09 760 732 165.8
B 0 199 112679 675.27 760 732 165.8
B 0 173 80232 479.55 760 732 165.8
C 12 249 120721 578.19 754 748 207.5
C 12 252 49385 234.4 754 748 207.5
C 14 254 25173 117.71 754 748 207.5
D 8 240 457674 2206.07 728 697 207.1
D 2 120 431374 2079.11 728 697 207.1
D 8 129 383733 1849.12 728 697 207.1

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