ASTROSAT CZTI

Data Quality Report

Orbit 52858

Creation date: 2025-07-16T10:55:15.730551
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/AS1C09_011T08_9000006482_52858cztM0_level2.fits modeM0/AS1C09_011T08_9000006482_52858cztM0_level2_quad_clean.evt
Size (bytes)836,438,40081,648,000
Size797.7 MB 77.9 MB
Events in quadrant A7,704,374550,312
Events in quadrant B9,473,588477,253
Events in quadrant C4,757,255555,432
Events in quadrant D8,533,978442,927

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0274221
B0326041
C0188431
D0297831

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0100
B0100
C0100
D0100

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01300
B01300
C01300
D01300

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6388112017.532874%
B6389216933.948975%
C63895618.780717%
D6389163425.575207%

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 7438 6389 911 911 12.25% 14.26%
B 7439 6389 1617 1617 21.74% 25.31%
C 7439 6390 439 439 5.90% 6.87%
D 7439 6389 1497 1497 20.12% 23.43%

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 9 191 2590613 15879.6 643 628 163.1
A 3 62 982799 6021.84 643 628 163.1
A 3 14 936822 5739.95 643 628 163.1
B 8 3 6705647 53523.9 592 575 125.3
B 4 81 60581 479.0 592 575 125.3
B 0 171 60200 475.96 592 575 125.3
C 15 224 817065 4666.75 628 622 174.9
C 13 3 591970 3380.11 628 622 174.9
C 14 246 277144 1580.59 628 622 174.9
D 8 176 1932334 11687.92 581 557 165.3
D 12 2 1851924 11201.41 581 557 165.3
D 7 96 1000620 6050.73 581 557 165.3

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