ASTROSAT CZTI

Data Quality Report

Orbit 35987

Creation date: 2022-07-19T00:27:14.465819
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/AS1A11_050T19_9000005156_35987cztM0_level2.evt modeM0/AS1A11_050T19_9000005156_35987cztM0_level2_quad_clean.evt
Size (bytes)1,667,390,400135,694,080
Size1.6 GB 129.4 MB
Events in quadrant A4,243,9061,200,865
Events in quadrant B22,986,691341,991
Events in quadrant C13,633,795850,399
Events in quadrant D9,053,4781,108,316

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0177643
B0742107
C0462402
D0330212

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01780
B01780
C01780
D01780

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0220
B0220
C0220
D0220

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A861590.104469%
B8664865899.930748%
C8705387844.549110%
D870598411.303848%

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 13004 8618 0 0 0.00% 0.00%
B 12962 8663 8521 8521 65.74% 98.36%
C 13004 8707 3644 3644 28.02% 41.85%
D 13004 8707 613 613 4.71% 7.04%

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 10 83 209176 1010.13 1042 1024 206.1
A 13 254 14036 63.15 1042 1024 206.1
A 3 137 10053 43.82 1042 1024 206.1
B 5 31 9335934 143935.11 347 339 64.9
B 5 15 8320467 128278.76 347 339 64.9
B 5 14 3263638 50313.16 347 339 64.9
C 9 187 10116767 59241.56 751 759 170.8
C 15 214 271728 1586.85 751 759 170.8
C 0 207 217667 1270.26 751 759 170.8
D 1 52 3587590 14806.82 999 971 242.2
D 8 195 356119 1466.17 999 971 242.2
D 13 249 343064 1412.28 999 971 242.2

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