ASTROSAT CZTI

Data Quality Report

Orbit 53876

Creation date: 2025-09-13T16:59:49.080741
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_057T04_9000006508_53876cztM0_level2.fits modeM0/AS1A14_057T04_9000006508_53876cztM0_level2_quad_clean.evt
Size (bytes)632,102,40089,686,080
Size602.8 MB 85.5 MB
Events in quadrant A3,978,287635,014
Events in quadrant B3,932,898670,848
Events in quadrant C6,692,631536,755
Events in quadrant D8,302,481429,453

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0161142
B0159211
C0243401
D0291131

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01300
B01300
C01300
D01300

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0120
B0120
C0120
D0120

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A63481512.378702%
B63482393.764965%
C634898415.500945%
D6348178928.182105%

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 7553 6349 198 198 2.62% 3.12%
B 7553 6349 153 153 2.03% 2.41%
C 7553 6347 720 720 9.53% 11.34%
D 7553 6348 1590 1590 21.05% 25.05%

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 12 115 699876 3988.14 697 680 175.3
A 15 174 277888 1581.16 697 680 175.3
A 3 62 80745 456.68 697 680 175.3
B 0 213 543289 3657.74 690 666 148.3
B 5 250 143151 960.47 690 666 148.3
B 5 185 114348 766.31 690 666 148.3
C 15 224 2086786 11813.58 638 634 176.6
C 15 158 965358 5463.09 638 634 176.6
C 13 3 523037 2958.29 638 634 176.6
D 8 176 5194796 30587.39 582 552 169.8
D 13 153 237234 1393.75 582 552 169.8
D 2 172 192639 1131.14 582 552 169.8

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