ASTROSAT CZTI

Data Quality Report

Orbit 20180404_A04_012T01_9000002012_level2

Creation date: 2025-11-20T14:39:45.210145
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/AS1A04_012T01_9000002012cztM0_level2.fits modeM0/AS1A04_012T01_9000002012cztM0_level2_quad_clean.evt
Size (bytes)191,687,040175,320,000
Size182.8 MB 167.2 MB
Events in quadrant A1,163,4121,030,681
Events in quadrant B1,109,6281,007,429
Events in quadrant C1,133,634972,908
Events in quadrant D968,292867,549

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0428650
B0459330
C0429740
D0535920

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0230
B0230
C0230
D0230

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A04240
B04240
C04240
D04240

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A207681820.876348%
B207683331.603428%
C207681350.650039%
D207687983.842450%

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 23053 20769 0 0 0.00% 0.00%
B 23053 20767 0 0 0.00% 0.00%
C 23052 20767 0 0 0.00% 0.00%
D 23053 20760 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 14 188 1099 10.43 301 280 78.5
A 0 29 1063 9.97 301 280 78.5
A 14 204 978 8.89 301 280 78.5
B 2 9 906 10.1 292 277 62.3
B 14 254 803 8.45 292 277 62.3
B 3 17 747 7.55 292 277 62.3
C 1 80 865 7.41 298 277 79.4
C 1 81 856 7.29 298 277 79.4
C 12 241 776 6.29 298 277 79.4
D 4 160 729 6.38 276 251 75.0
D 7 3 709 6.11 276 251 75.0
D 6 231 706 6.07 276 251 75.0

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