ASTROSAT CZTI

Data Quality Report

Orbit 20210627_A10_109T01_9000004492_level2

Creation date: 2025-12-27T07:35:18.515932
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/AS1A10_109T01_9000004492cztM0_level2.fits modeM0/AS1A10_109T01_9000004492cztM0_level2_quad_clean.evt
Size (bytes)2,302,917,1201,871,403,840
Size2.1 GB 1.7 GB
Events in quadrant A14,452,38810,907,194
Events in quadrant B13,531,97010,713,648
Events in quadrant C13,941,12010,253,468
Events in quadrant D12,471,7889,453,091

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A04744640
B06834400
C05119700
D05589010

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A045740
B045710
C045740
D045830

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03700
B03700
C03680
D03700

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A22412126741.193106%
B22375655732.490659%
C22405275643.376002%
D22401940881.824845%

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 258577 222415 0 0 0.00% 0.00%
B 258577 222279 0 0 0.00% 0.00%
C 258577 222454 0 0 0.00% 0.00%
D 258575 222384 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 13831 11.39 3759 3541 903.5
A 7 110 11422 8.72 3759 3541 903.5
A 9 19 10928 8.18 3759 3541 903.5
B 2 9 10737 10.45 3572 3410 701.2
B 3 80 8954 7.91 3572 3410 701.2
B 2 8 8940 7.89 3572 3410 701.2
C 12 241 9561 6.61 3693 3473 920.6
C 3 187 9478 6.52 3693 3473 920.6
C 3 126 9446 6.49 3693 3473 920.6
D 4 246 9728 6.94 3561 3253 933.3
D 15 46 9415 6.6 3561 3253 933.3
D 10 189 8700 5.84 3561 3253 933.3

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