ASTROSAT CZTI

Data Quality Report

Orbit 18825

Creation date: 2024-06-27T17:55:18.838108
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/AS1A05_173T01_9000002812_18825cztM0_level2.evt modeM0/AS1A05_173T01_9000002812_18825cztM0_level2_quad_clean.evt
Size (bytes)1,334,304,000209,401,920
Size1.2 GB 199.7 MB
Events in quadrant A7,465,0981,365,108
Events in quadrant B8,272,1301,355,073
Events in quadrant C7,559,1911,322,883
Events in quadrant D16,069,5931,232,513

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03120
B03120
C03120
D03120

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0120
B0120
C0120
D0120

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0322802
B0346352
C0324272
D0586282

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A15456990.640528%
B154564302.782091%
C154562031.313406%
D15457318420.599081%

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 16646 15458 10 10 0.06% 0.06%
B 16646 15458 213 213 1.28% 1.38%
C 16646 15458 25 25 0.15% 0.16%
D 16647 15459 2855 2855 17.15% 18.47%

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 15 174 182180 480.99 1852 1811 375.0
A 8 205 90728 237.12 1852 1811 375.0
A 8 144 29121 72.83 1852 1811 375.0
B 4 251 588389 1664.1 1837 1792 352.5
B 7 220 132405 370.53 1837 1792 352.5
B 6 36 120714 337.36 1837 1792 352.5
C 14 238 275298 654.32 1775 1789 418.0
C 9 54 171195 405.27 1775 1789 418.0
C 0 207 112798 265.57 1775 1789 418.0
D 12 110 6818678 17301.48 1612 1565 394.0
D 7 38 2451732 6218.4 1612 1565 394.0
D 1 52 543807 1376.18 1612 1565 394.0

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