ASTROSAT CZTI

Data Quality Report

Orbit 53761

Creation date: 2025-09-05T11:40:40.339843
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_022T04_9000006506_53761cztM0_level2.fits modeM0/AS1A14_022T04_9000006506_53761cztM0_level2_quad_clean.evt
Size (bytes)891,129,60072,089,280
Size849.8 MB 68.7 MB
Events in quadrant A15,994,6396,181
Events in quadrant B3,345,181690,267
Events in quadrant C8,596,221458,119
Events in quadrant D4,543,048571,724

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0520534
B0145532
C0300142
D0181312

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01340
B01340
C01340
D01340

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0150
B0160
C0160
D0160

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6540649599.311927%
B65402013.073394%
C6540194429.724771%
D65402513.837920%

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 7679 6539 5730 5730 74.62% 87.63%
B 7680 6540 48 48 0.62% 0.73%
C 7679 6539 1795 1795 23.38% 27.45%
D 7680 6540 208 208 2.71% 3.18%

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 63 15098446 292273.32 199 193 51.7
A 0 8 32596 627.26 199 193 51.7
A 3 78 29021 558.05 199 193 51.7
B 0 213 189494 1217.82 716 689 155.0
B 4 81 119128 763.95 716 689 155.0
B 5 250 63548 405.45 716 689 155.0
C 1 241 3113848 19410.24 583 576 160.4
C 15 224 2533337 15790.94 583 576 160.4
C 12 252 331594 2063.79 583 576 160.4
D 2 172 530795 2718.73 687 658 195.0
D 3 12 446557 2286.73 687 658 195.0
D 10 172 369951 1893.86 687 658 195.0

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