ASTROSAT CZTI

Data Quality Report

Orbit 56858

Creation date: 2026-04-01T21:47:26.488943
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_083T03_9000006562_56858cztM0_level2.fits modeM0/AS1A14_083T03_9000006562_56858cztM0_level2_quad_clean.evt
Size (bytes)559,471,68088,776,000
Size533.6 MB 84.7 MB
Events in quadrant A6,797,283494,608
Events in quadrant B3,552,974643,116
Events in quadrant C3,711,345589,082
Events in quadrant D6,138,358503,722

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A080
B080
C080
D080

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01320
B01320
C01320
D01320

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0248331
B0154361
C0160431
D0228011

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6561150322.908093%
B65613024.602957%
C65611722.621552%
D656286913.242914%

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 7325 6560 1354 1354 18.48% 20.64%
B 7326 6562 175 175 2.39% 2.67%
C 7326 6562 161 161 2.20% 2.45%
D 7327 6563 878 878 11.98% 13.38%

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 62 4027781 25983.92 625 611 155.0
A 3 46 231190 1487.73 625 611 155.0
A 3 14 27176 171.4 625 611 155.0
B 10 16 549697 3820.47 667 642 143.7
B 5 185 103373 714.83 667 642 143.7
B 10 32 52960 364.04 667 642 143.7
C 13 3 655955 3603.47 666 660 181.9
C 9 38 266318 1460.85 666 660 181.9
C 14 96 80373 438.34 666 660 181.9
D 2 249 2608670 14372.27 638 609 181.5
D 8 240 598345 3293.95 638 609 181.5
D 5 113 172565 947.6 638 609 181.5

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