ASTROSAT CZTI

Data Quality Report

Orbit 51641

Creation date: 2025-04-15T18:15:05.953241
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/AS1A13_037T05_9000006460_51641cztM0_level2.fits modeM0/AS1A13_037T05_9000006460_51641cztM0_level2_quad_clean.evt
Size (bytes)481,501,440103,294,080
Size459.2 MB 98.5 MB
Events in quadrant A4,152,771675,038
Events in quadrant B4,091,588726,185
Events in quadrant C4,672,820639,785
Events in quadrant D4,375,664610,780

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0110
B0110
C0110
D0110

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0169812
B0165942
C0184962
D0174872

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01380
B01380
C01380
D01380

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A68342343.424056%
B68352794.081931%
C68353805.559620%
D68352213.233358%

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 7914 6835 71 71 0.90% 1.04%
B 7915 6836 74 74 0.93% 1.08%
C 7915 6836 214 214 2.70% 3.13%
D 7915 6836 116 116 1.47% 1.70%

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 12 250 412224 2141.95 785 766 192.1
A 3 14 199383 1033.95 785 766 192.1
A 12 80 86481 446.21 785 766 192.1
B 1 223 175312 1065.3 769 742 163.9
B 4 170 106349 644.46 769 742 163.9
B 7 252 103429 626.64 769 742 163.9
C 15 189 646556 3134.09 754 751 206.1
C 10 19 305432 1478.62 754 751 206.1
C 12 254 192717 931.61 754 751 206.1
D 8 176 432635 2051.87 760 734 210.5
D 2 249 311613 1476.92 760 734 210.5
D 6 222 176056 832.92 760 734 210.5

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