ASTROSAT CZTI

Data Quality Report

Orbit 20210721_A10_094T28_9000004578_level2

Creation date: 2025-12-27T20:40:09.200261
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_094T28_9000004578cztM0_level2.fits modeM0/AS1A10_094T28_9000004578cztM0_level2_quad_clean.evt
Size (bytes)73,739,52082,756,800
Size70.3 MB 78.9 MB
Events in quadrant A453,642524,414
Events in quadrant B399,742478,104
Events in quadrant C441,660496,419
Events in quadrant D389,544458,266

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0110
B0110
C0110
D0110

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0160130
B0275470
C0164550
D0198930

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01620
B01620
C01620
D01620

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A7889610.773229%
B788979310.051971%
C78891592.015465%
D78891221.546457%

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 8558 7888 0 0 0.00% 0.00%
B 8558 7852 0 0 0.00% 0.00%
C 8558 7888 0 0 0.00% 0.00%
D 8558 7886 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 29 434 10.19 118 111 31.7
A 0 30 338 7.16 118 111 31.7
A 15 236 335 7.06 118 111 31.7
B 2 9 333 9.77 105 100 23.8
B 14 254 272 7.21 105 100 23.8
B 2 8 269 7.09 105 100 23.8
C 12 241 348 7.63 116 109 31.3
C 1 80 335 7.21 116 109 31.3
C 1 81 331 7.09 116 109 31.3
D 15 47 298 6.4 111 101 30.8
D 3 14 296 6.33 111 101 30.8
D 6 192 279 5.78 111 101 30.8

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