ASTROSAT CZTI

Data Quality Report

Orbit 20161222_T01_145T01_9000000916_level2

Creation date: 2025-11-08T21:20:34.930407
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/AS1T01_145T01_9000000916cztM0_level2.fits modeM0/AS1T01_145T01_9000000916cztM0_level2_quad_clean.evt
Size (bytes)620,691,840894,214,080
Size591.9 MB 852.8 MB
Events in quadrant A3,742,6826,018,380
Events in quadrant B3,651,0366,025,518
Events in quadrant C3,735,7325,750,150
Events in quadrant D2,797,9824,427,639

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01478150
B01522540
C01446850
D02566900

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01040
B01040
C01040
D01040

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A014480
B014480
C014480
D014480

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A7091810921.539807%
B7091813351.882456%
C709188251.163315%
D709181274417.970050%

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 81388 70922 0 0 0.00% 0.00%
B 81388 70917 0 0 0.00% 0.00%
C 81388 70918 0 0 0.00% 0.00%
D 81388 70147 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 3795 11.56 974 910 249.7
A 7 110 3263 9.42 974 910 249.7
A 0 30 2943 8.14 974 910 249.7
B 2 9 3214 11.89 966 921 192.8
B 12 226 2627 8.85 966 921 192.8
B 14 254 2550 8.45 966 921 192.8
C 1 80 2746 7.02 985 908 261.7
C 1 81 2692 6.82 985 908 261.7
C 12 241 2674 6.75 985 908 261.7
D 3 14 2166 6.8 798 724 212.0
D 11 82 2107 6.52 798 724 212.0
D 4 160 2039 6.2 798 724 212.0

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