ASTROSAT CZTI

Data Quality Report

Orbit 20210626_C06_002T01_9000004490_level2

Creation date: 2025-12-27T07:15:36.166311
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/AS1C06_002T01_9000004490cztM0_level2.fits modeM0/AS1C06_002T01_9000004490cztM0_level2_quad_clean.evt
Size (bytes)935,539,200966,657,600
Size892.2 MB 921.9 MB
Events in quadrant A5,932,5146,241,929
Events in quadrant B5,492,9386,044,662
Events in quadrant C5,733,6565,927,457
Events in quadrant D4,422,0304,319,680

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02028680
B03090810
C02114900
D03782340

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01290
B01290
C01290
D01290

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A020080
B020080
C020080
D020080

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A9834410291.046327%
B9834430523.103392%
C9834423552.394655%
D983441942219.749044%

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 113479 98337 0 0 0.00% 0.00%
B 113479 98318 0 0 0.00% 0.00%
C 113480 98336 0 0 0.00% 0.00%
D 113479 96981 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 5923 11.99 1543 1454 372.6
A 7 110 4740 8.82 1543 1454 372.6
A 0 30 4535 8.27 1543 1454 372.6
B 2 9 4478 10.98 1458 1396 280.8
B 3 80 3715 8.26 1458 1396 280.8
B 2 8 3680 8.14 1458 1396 280.8
C 3 187 4024 6.79 1522 1431 382.1
C 12 241 4005 6.74 1522 1431 382.1
C 3 126 3929 6.54 1522 1431 382.1
D 15 47 3330 6.57 1266 1154 331.4
D 15 63 3224 6.25 1266 1154 331.4
D 10 189 3173 6.09 1266 1154 331.4

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