ASTROSAT CZTI

Data Quality Report

Orbit 52646

Creation date: 2025-06-23T15:54:35.682230
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_011T07_9000006480_52646cztM0_level2.fits modeM0/AS1C09_011T07_9000006480_52646cztM0_level2_quad_clean.evt
Size (bytes)700,280,64093,772,800
Size667.8 MB 89.4 MB
Events in quadrant A3,752,468666,473
Events in quadrant B4,364,663689,362
Events in quadrant C11,197,502418,229
Events in quadrant D6,061,840574,144

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A020
B020
C020
D020

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01460
B01460
C01460
D01460

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0163671
B0180282
C0381721
D0230311

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A7046941.334090%
B70452803.974450%
C7045273238.779276%
D70454376.202981%

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 7206 7048 72 72 1.00% 1.02%
B 7205 7047 135 135 1.87% 1.92%
C 7205 7047 2486 2486 34.50% 35.28%
D 7205 7046 411 411 5.70% 5.83%

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 7 206 295741 1629.47 722 702 181.1
A 3 14 145604 800.28 722 702 181.1
A 5 240 60040 327.72 722 702 181.1
B 5 185 491774 3268.73 710 685 150.2
B 8 234 271704 1803.93 710 685 150.2
B 12 32 221502 1469.78 710 685 150.2
C 15 248 4204852 26235.63 580 574 160.3
C 15 178 3556842 22191.9 580 574 160.3
C 13 3 698352 4354.29 580 574 160.3
D 6 42 1153324 5890.1 678 645 195.7
D 8 176 623695 3183.74 678 645 195.7
D 2 153 411387 2098.86 678 645 195.7

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