ASTROSAT CZTI

Data Quality Report

Orbit 56177

Creation date: 2026-02-15T02:48:20.476480
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_083T04_9000006550_56177cztM0_level2.fits modeM0/AS1A14_083T04_9000006550_56177cztM0_level2_quad_clean.evt
Size (bytes)690,909,120103,749,120
Size658.9 MB 98.9 MB
Events in quadrant A7,535,699623,096
Events in quadrant B6,366,812710,686
Events in quadrant C6,836,110618,289
Events in quadrant D4,232,417646,967

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01560
B01560
C01560
D01560

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0278772
B0242270
C0260080
D0182500

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A7791134217.225003%
B779185210.935695%
C7792107813.834702%
D77921121.437372%

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 7791 7791 954 954 12.24% 12.24%
B 7791 7791 543 543 6.97% 6.97%
C 7792 7792 742 742 9.52% 9.52%
D 7792 7792 107 107 1.37% 1.37%

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 15 32 1430067 7598.41 758 740 188.1
A 7 64 1022304 5430.71 758 740 188.1
A 0 212 627826 3333.64 758 740 188.1
B 4 171 1246536 7530.47 786 761 165.4
B 5 236 1145356 6918.85 786 761 165.4
B 10 247 309130 1864.03 786 761 165.4
C 12 254 2901315 14207.8 746 740 204.2
C 1 12 828475 4054.47 746 740 204.2
C 12 252 46533 224.3 746 740 204.2
D 2 249 425616 1910.95 784 749 222.3
D 11 129 142993 639.78 784 749 222.3
D 2 62 77661 345.93 784 749 222.3

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