ASTROSAT CZTI

Data Quality Report

Orbit 20201116_A09_038T34_9000004008_level2

Creation date: 2025-12-17T17:49:06.140484
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/AS1A09_038T34_9000004008cztM0_level2.fits modeM0/AS1A09_038T34_9000004008cztM0_level2_quad_clean.evt
Size (bytes)96,897,600134,046,720
Size92.4 MB 127.8 MB
Events in quadrant A588,918876,588
Events in quadrant B559,154877,137
Events in quadrant C564,870820,183
Events in quadrant D501,524765,584

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A020
B020
C020
D020

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0212570
B0220240
C0233070
D0235980

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02120
B02120
C02120
D02120

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A103901201.154957%
B103901901.828681%
C103902612.512031%
D103901781.713186%

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 10645 10389 0 0 0.00% 0.00%
B 10645 10389 0 0 0.00% 0.00%
C 10645 10389 0 0 0.00% 0.00%
D 10645 10385 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 29 579 10.95 153 143 39.8
A 7 110 490 8.72 153 143 39.8
A 0 30 438 7.41 153 143 39.8
B 2 9 457 9.96 148 142 31.6
B 14 254 400 8.16 148 142 31.6
B 2 8 365 7.05 148 142 31.6
C 7 111 394 6.47 149 139 39.4
C 3 126 394 6.47 149 139 39.4
C 12 241 388 6.32 149 139 39.4
D 4 246 422 7.3 143 130 40.0
D 10 189 375 6.13 143 130 40.0
D 6 38 364 5.85 143 130 40.0

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