ASTROSAT CZTI

Data Quality Report

Orbit 56279

Creation date: 2026-02-23T14:46:34.395887
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_049T01_9000006552_56279cztM0_level2.fits modeM0/AS1A14_049T01_9000006552_56279cztM0_level2_quad_clean.evt
Size (bytes)748,656,00088,401,600
Size714.0 MB 84.3 MB
Events in quadrant A13,147,234350,577
Events in quadrant B3,738,678687,434
Events in quadrant C4,729,101606,821
Events in quadrant D5,560,704548,591

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01380
B01380
C01380
D01380

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0438321
B0159870
C0189470
D0214060

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6934351450.677819%
B69351462.105263%
C69352653.821197%
D69354736.820476%

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 6934 6934 3461 3461 49.91% 49.91%
B 6935 6935 58 58 0.84% 0.84%
C 6935 6935 244 244 3.52% 3.52%
D 6935 6935 505 505 7.28% 7.28%

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 8 176 4237338 29188.37 575 562 145.2
A 15 32 3541546 24394.86 575 562 145.2
A 12 115 1011042 6961.49 575 562 145.2
B 5 185 280275 1834.81 717 692 152.4
B 1 207 112504 733.79 717 692 152.4
B 0 171 75013 487.74 717 692 152.4
C 15 230 640395 3358.7 692 686 190.5
C 12 254 614716 3223.88 692 686 190.5
C 5 250 178176 931.89 692 686 190.5
D 2 249 1055009 5459.4 675 643 193.1
D 3 12 535276 2768.28 675 643 193.1
D 7 77 294329 1520.68 675 643 193.1

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