ASTROSAT CZTI

Data Quality Report

Orbit 20191121_T03_159T01_9000003328_level2

Creation date: 2025-12-06T01:21:57.760536
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_159T01_9000003328cztM0_level2.fits modeM0/AS1T03_159T01_9000003328cztM0_level2_quad_clean.evt
Size (bytes)497,522,880469,275,840
Size474.5 MB 447.5 MB
Events in quadrant A3,068,6382,820,146
Events in quadrant B2,958,8802,837,714
Events in quadrant C2,982,9042,643,932
Events in quadrant D2,613,2062,465,914

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0860
B0860
C0860
D0860

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A09520
B09520
C09520
D09520

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01053720
B01082750
C01050790
D01097170

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A504266541.296950%
B504268411.667790%
C504269211.826439%
D504266911.370325%

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 59201 50419 0 0 0.00% 0.00%
B 59201 50419 0 0 0.00% 0.00%
C 59201 50420 0 0 0.00% 0.00%
D 59201 50423 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 2870 10.66 798 749 198.9
A 7 110 2482 8.71 798 749 198.9
A 9 19 2302 7.81 798 749 198.9
B 2 9 2366 10.54 782 746 153.6
B 2 8 1998 8.15 782 746 153.6
B 5 128 1921 7.65 782 746 153.6
C 1 80 2246 7.44 787 736 202.9
C 1 81 2236 7.39 787 736 202.9
C 3 234 2127 6.86 787 736 202.9
D 3 14 1899 6.21 744 677 196.8
D 13 238 1877 6.09 744 677 196.8
D 6 231 1854 5.98 744 677 196.8

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