ASTROSAT CZTI

Data Quality Report

Orbit 20180510_A04_224T05_9000002088_level2

Creation date: 2025-11-22T07:29:53.754836
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_224T05_9000002088cztM0_level2.fits modeM0/AS1A04_224T05_9000002088cztM0_level2_quad_clean.evt
Size (bytes)194,267,520166,875,840
Size185.3 MB 159.1 MB
Events in quadrant A1,178,668947,923
Events in quadrant B1,135,986953,301
Events in quadrant C1,178,852954,459
Events in quadrant D991,658799,447

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0428010
B0428340
C0431690
D0566110

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0140
B0140
C0140
D0140

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A04180
B04180
C04180
D04180

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A202832551.257210%
B202833821.883351%
C202832251.109303%
D2028313926.862890%

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 21878 20283 0 0 0.00% 0.00%
B 21878 20283 0 0 0.00% 0.00%
C 21878 20283 0 0 0.00% 0.00%
D 21878 20271 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 1090 10.37 306 285 77.6
A 7 110 966 8.78 306 285 77.6
A 0 30 848 7.25 306 285 77.6
B 2 9 910 9.86 299 284 63.5
B 2 8 760 7.5 299 284 63.5
B 3 17 742 7.22 299 284 63.5
C 1 80 907 7.44 310 287 83.3
C 1 81 898 7.34 310 287 83.3
C 12 250 877 7.08 310 287 83.3
D 4 246 758 6.42 282 256 78.2
D 3 14 751 6.33 282 256 78.2
D 6 231 714 5.86 282 256 78.2

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