ASTROSAT CZTI

Data Quality Report

Orbit 51886

Creation date: 2025-05-02T10:43:13.392528
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_011T05_9000006466_51886cztM0_level2.fits modeM0/AS1C09_011T05_9000006466_51886cztM0_level2_quad_clean.evt
Size (bytes)733,766,40085,348,800
Size699.8 MB 81.4 MB
Events in quadrant A5,734,851599,775
Events in quadrant B4,265,996671,548
Events in quadrant C4,419,774605,511
Events in quadrant D12,244,004259,433

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01300
B01300
C01300
D01300

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0215172
B0171043
C0176672
D0408322

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0170
B0180
C0180
D0180

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A64193465.390248%
B64181602.492988%
C64182764.300405%
D6418372057.961982%

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 7535 6420 278 278 3.69% 4.33%
B 7534 6419 73 73 0.97% 1.14%
C 7534 6419 198 198 2.63% 3.08%
D 7534 6418 3073 3073 40.79% 47.88%

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 12 3 1273716 7466.17 670 652 170.5
A 4 175 455442 2667.22 670 652 170.5
A 11 3 448302 2625.34 670 652 170.5
B 0 171 237756 1669.2 676 655 142.0
B 10 254 210169 1474.99 676 655 142.0
B 4 170 196226 1376.83 676 655 142.0
C 14 245 708009 3886.87 666 662 182.0
C 15 231 146403 800.85 666 662 182.0
C 15 219 130396 712.89 666 662 182.0
D 11 129 6267062 49806.92 437 419 125.8
D 12 17 1743100 13850.73 437 419 125.8
D 3 12 1181621 9388.13 437 419 125.8

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