ASTROSAT CZTI

Data Quality Report

Orbit 53874

Creation date: 2025-09-13T01:55:29.535573
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_53874cztM0_level2.fits modeM0/AS1A14_057T04_9000006508_53874cztM0_level2_quad_clean.evt
Size (bytes)595,664,64086,284,800
Size568.1 MB 82.3 MB
Events in quadrant A2,990,372609,313
Events in quadrant B3,774,351637,792
Events in quadrant C8,984,755420,504
Events in quadrant D5,810,438503,565

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0135131
B0156381
C0310681
D0217351

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01300
B01300
C01300
D01300

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0100
B0100
C0100
D0100

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6313500.792016%
B63141522.407349%
C6314193630.662021%
D631464010.136205%

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 7328 6314 34 34 0.46% 0.54%
B 7329 6315 88 88 1.20% 1.39%
C 7329 6315 1680 1680 22.92% 26.60%
D 7329 6315 633 633 8.64% 10.02%

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 3 62 124286 736.71 672 653 167.8
A 15 174 114820 680.3 672 653 167.8
A 0 8 26967 156.8 672 653 167.8
B 4 81 295777 2079.02 666 644 142.0
B 5 185 168947 1185.59 666 644 142.0
B 0 213 130401 914.05 666 644 142.0
C 15 224 2903321 18898.34 554 548 153.6
C 1 241 2158658 14050.25 554 548 153.6
C 15 209 620700 4037.46 554 548 153.6
D 8 176 2246842 12307.78 632 604 182.5
D 7 70 213881 1168.61 632 604 182.5
D 13 153 208612 1139.73 632 604 182.5

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