ASTROSAT CZTI

Data Quality Report

Orbit 57727

Creation date: 2026-05-30T08:24:59.049740
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_125T09_9000006578_57727cztM0_level2.fits modeM0/AS1A14_125T09_9000006578_57727cztM0_level2_quad_clean.evt
Size (bytes)513,368,64093,481,920
Size489.6 MB 89.2 MB
Events in quadrant A2,837,646650,302
Events in quadrant B3,881,394677,306
Events in quadrant C7,540,715527,479
Events in quadrant D4,254,874536,626

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0150
B0160
C0160
D0160

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01280
B01280
C01280
D01280

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0129172
B0158162
C0267452
D0171112

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6288280.445293%
B62882724.325700%
C6288123519.640585%
D62885007.951654%

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 6289 5 5 0.07% 0.08%
B 7498 6289 139 139 1.85% 2.21%
C 7498 6289 1151 1151 15.35% 18.30%
D 7498 6289 429 429 5.72% 6.82%

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 47283 268.77 699 683 173.4
A 3 61 35641 201.63 699 683 173.4
A 3 245 29486 166.13 699 683 173.4
B 4 171 332225 2311.32 680 655 143.5
B 4 80 226109 1571.6 680 655 143.5
B 0 155 162253 1126.47 680 655 143.5
C 15 224 2548331 14730.24 635 628 173.0
C 12 254 2300935 13299.85 635 628 173.0
C 14 254 145747 839.05 635 628 173.0
D 8 160 685138 3699.31 657 627 185.0
D 8 240 431660 2329.43 657 627 185.0
D 3 224 260017 1401.82 657 627 185.0

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