ASTROSAT CZTI

Data Quality Report

Orbit 20200731_A09_012T01_9000003778_level2

Creation date: 2025-12-14T01:15:23.290978
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_012T01_9000003778cztM0_level2.fits modeM0/AS1A09_012T01_9000003778cztM0_level2_quad_clean.evt
Size (bytes)88,813,44077,454,720
Size84.7 MB 73.9 MB
Events in quadrant A544,416446,887
Events in quadrant B522,448448,323
Events in quadrant C533,112429,843
Events in quadrant D454,734384,531

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0186660
B0192230
C0190440
D0270650

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0190
B0190
C0190
D0190

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01880
B01880
C01880
D01880

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A9151340.371544%
B9151660.721233%
C91511251.365971%
D91514965.420173%

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 11015 9150 0 0 0.00% 0.00%
B 11016 9151 0 0 0.00% 0.00%
C 11016 9150 0 0 0.00% 0.00%
D 11016 9146 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 29 457 8.85 141 133 36.6
A 0 30 437 8.31 141 133 36.6
A 7 110 426 8.01 141 133 36.6
B 2 9 459 11.08 138 132 29.5
B 3 80 377 8.3 138 132 29.5
B 5 128 360 7.73 138 132 29.5
C 12 241 400 7.1 141 133 37.6
C 12 250 379 6.55 141 133 37.6
C 2 191 364 6.15 141 133 37.6
D 7 3 332 6.01 129 118 35.6
D 6 231 331 5.98 129 118 35.6
D 6 62 330 5.95 129 118 35.6

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