ASTROSAT CZTI

Data Quality Report

Orbit 20210808_T04_034T01_9000004632_level2

Creation date: 2025-12-28T07:40:31.216452
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/AS1T04_034T01_9000004632cztM0_level2.fits modeM0/AS1T04_034T01_9000004632cztM0_level2_quad_clean.evt
Size (bytes)1,173,231,360848,269,440
Size1.1 GB 809.0 MB
Events in quadrant A7,327,9244,651,851
Events in quadrant B6,814,9464,630,823
Events in quadrant C7,219,0284,480,494
Events in quadrant D6,432,3464,191,258

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02110
B02120
C02120
D02120

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A023040
B023020
C022980
D022980

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02899100
B03765210
C02867190
D02989020

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A11288055534.919383%
B11280772646.439317%
C11283249504.387053%
D11275933642.983354%

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 338395 110131 0 0 0.00% 0.00%
B 338395 109636 0 0 0.00% 0.00%
C 338395 110084 0 0 0.00% 0.00%
D 338395 109936 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 5968 9.13 1912 1799 456.4
A 7 110 5746 8.65 1912 1799 456.4
A 9 19 5429 7.95 1912 1799 456.4
B 2 9 5528 10.72 1808 1733 353.9
B 3 80 4676 8.32 1808 1733 353.9
B 5 128 4603 8.11 1808 1733 353.9
C 1 81 5666 8.09 1913 1807 477.2
C 1 80 5588 7.92 1913 1807 477.2
C 3 187 4956 6.6 1913 1807 477.2
D 10 189 4554 5.99 1842 1692 477.4
D 7 3 4482 5.84 1842 1692 477.4
D 6 231 4444 5.76 1842 1692 477.4

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