ASTROSAT CZTI

Data Quality Report

Orbit 20201016_T03_255T01_9000003922_level2

Creation date: 2025-12-16T14:15:51.835232
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/AS1T03_255T01_9000003922cztM0_level2.fits modeM0/AS1T03_255T01_9000003922cztM0_level2_quad_clean.evt
Size (bytes)2,303,354,8801,860,894,720
Size2.1 GB 1.7 GB
Events in quadrant A14,673,60411,031,383
Events in quadrant B13,714,25210,661,855
Events in quadrant C13,648,0649,978,475
Events in quadrant D12,103,0269,070,222

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A046460
B046460
C046460
D046460

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03700
B03700
C03700
D03700

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A04868060
B05346300
C05524450
D06106990

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A22790225771.130749%
B22790273553.227264%
C227902113324.972313%
D227902112624.941598%

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 265022 227884 0 0 0.00% 0.00%
B 265022 227737 0 0 0.00% 0.00%
C 265022 227745 0 0 0.00% 0.00%
D 265022 227710 0 0 0.00% 0.00%

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 0 29 14232 11.79 3821 3603 901.5
A 7 110 11612 8.88 3821 3603 901.5
A 0 30 11294 8.53 3821 3603 901.5
B 2 9 10687 10.26 3639 3480 702.3
B 5 128 9052 7.93 3639 3480 702.3
B 2 8 8989 7.84 3639 3480 702.3
C 1 81 10474 7.88 3606 3375 900.9
C 1 80 10462 7.87 3606 3375 900.9
C 12 241 9644 6.96 3606 3375 900.9
D 10 189 8729 6.13 3459 3159 909.3
D 3 14 8588 5.97 3459 3159 909.3
D 7 3 8534 5.91 3459 3159 909.3

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