ASTROSAT CZTI

Data Quality Report

Orbit 57137

Creation date: 2026-04-20T17:51:36.603545
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_083T10_9000006566_57137cztM0_level2.fits modeM0/AS1A14_083T10_9000006566_57137cztM0_level2_quad_clean.evt
Size (bytes)531,328,320106,476,480
Size506.7 MB 101.5 MB
Events in quadrant A3,233,703709,342
Events in quadrant B3,734,873748,139
Events in quadrant C5,667,221620,599
Events in quadrant D6,449,747623,965

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0152190
B0164320
C0223350
D0244470

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01500
B01500
C01500
D01500

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A750250.066649%
B75031752.332400%
C75037249.649474%
D75032613.478609%

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 7502 7502 1 1 0.01% 0.01%
B 7503 7503 158 158 2.11% 2.11%
C 7503 7503 457 457 6.09% 6.09%
D 7503 7503 313 313 4.17% 4.17%

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 36863 180.33 811 790 200.0
A 10 251 19175 91.91 811 790 200.0
A 5 113 17172 81.89 811 790 200.0
B 5 172 408739 2394.14 788 757 170.4
B 10 16 80281 466.67 788 757 170.4
B 0 199 33720 193.44 788 757 170.4
C 12 252 1802007 8970.93 731 724 200.8
C 15 198 954031 4747.76 731 724 200.8
C 14 254 26098 126.37 731 724 200.8
D 15 142 2487514 11283.5 781 745 220.4
D 2 249 293743 1329.45 781 745 220.4
D 8 240 273092 1235.75 781 745 220.4

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