ASTROSAT CZTI

Data Quality Report

Orbit 52921

Creation date: 2025-07-17T00:42:42.551497
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/AS1C09_011T06_9000006484_52921cztM0_level2.fits modeM0/AS1C09_011T06_9000006484_52921cztM0_level2_quad_clean.evt
Size (bytes)902,911,68073,555,200
Size861.1 MB 70.1 MB
Events in quadrant A16,080,68981,691
Events in quadrant B3,780,314657,100
Events in quadrant C4,367,813572,655
Events in quadrant D8,685,194456,987

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A070
B070
C070
D070

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0523831
B0158161
C0177571
D0304117

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01340
B01340
C01340
D01340

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6572585389.059647%
B65732183.316598%
C65733595.461737%
D6572147122.382836%

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 7306 6572 5431 5431 74.34% 82.64%
B 7308 6574 49 49 0.67% 0.75%
C 7308 6574 187 187 2.56% 2.84%
D 7306 6572 1069 1069 14.63% 16.27%

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 9 191 14659065 200484.29 287 279 73.1
A 12 115 61653 839.4 287 279 73.1
A 3 45 28127 380.87 287 279 73.1
B 10 254 538299 3771.9 679 656 142.5
B 4 81 125122 873.21 679 656 142.5
B 10 247 99831 695.77 679 656 142.5
C 13 3 454668 2506.43 659 651 181.1
C 7 80 300452 1655.07 659 651 181.1
C 12 252 231550 1274.69 659 651 181.1
D 15 78 2944624 16759.31 617 591 175.7
D 12 0 1080398 6146.95 617 591 175.7
D 8 176 915233 5206.72 617 591 175.7

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