ASTROSAT CZTI

Data Quality Report

Orbit 20180720_T02_069T01_9000002242_level2

Creation date: 2025-11-23T15:30:36.913749
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/AS1T02_069T01_9000002242cztM0_level2.fits modeM0/AS1T02_069T01_9000002242cztM0_level2_quad_clean.evt
Size (bytes)463,538,880394,217,280
Size442.1 MB 376.0 MB
Events in quadrant A2,864,6022,300,509
Events in quadrant B2,647,2862,186,530
Events in quadrant C2,752,3042,102,761
Events in quadrant D2,426,0802,002,116

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01025940
B01347030
C01187990
D01074640

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A09960
B09960
C09960
D09960

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0630
B0630
C0630
D0640

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A487327471.532874%
B4873240858.382582%
C4873222454.606829%
D487329321.912501%

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 59365 48709 0 0 0.00% 0.00%
B 59365 48596 0 0 0.00% 0.00%
C 59365 48683 0 0 0.00% 0.00%
D 59365 48702 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 2763 11.13 744 696 185.8
A 7 110 2311 8.69 744 696 185.8
A 15 236 2183 8.01 744 696 185.8
B 2 9 2273 11.77 699 666 136.6
B 3 17 1761 8.02 699 666 136.6
B 5 225 1737 7.84 699 666 136.6
C 12 241 1900 6.48 727 676 188.9
C 2 191 1896 6.46 727 676 188.9
C 7 111 1778 5.83 727 676 188.9
D 6 231 1781 6.05 693 629 190.4
D 3 14 1743 5.85 693 629 190.4
D 3 31 1732 5.79 693 629 190.4

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