ASTROSAT CZTI

Data Quality Report

Orbit 17942

Creation date: 2024-06-27T17:42:53.869033
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/AS1T03_025T01_9000002670_17942cztM0_level2.evt modeM0/AS1T03_025T01_9000002670_17942cztM0_level2_quad_clean.evt
Size (bytes)1,417,538,880268,827,840
Size1.3 GB 256.4 MB
Events in quadrant A9,426,1571,743,253
Events in quadrant B8,755,7801,792,928
Events in quadrant C8,808,5111,702,117
Events in quadrant D14,658,6541,597,459

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03880
B03880
C03880
D03880

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0408714
B0385614
C0388084
D0565584

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0220
B0220
C0220
D0220

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A189533401.793911%
B189532011.060518%
C189522241.181933%
D1895318919.977312%

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 21143 18956 113 113 0.53% 0.60%
B 21143 18956 2 2 0.01% 0.01%
C 21142 18955 17 17 0.08% 0.09%
D 21143 18956 1336 1336 6.32% 7.05%

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 938549 2101.78 2206 2156 445.5
A 0 226 19101 38.03 2206 2156 445.5
A 3 137 17189 33.74 2206 2156 445.5
B 12 111 52087 118.83 2222 2163 420.1
B 11 111 45169 102.36 2222 2163 420.1
B 14 111 38222 85.83 2222 2163 420.1
C 14 238 326156 652.51 2126 2134 496.6
C 9 54 116224 229.75 2126 2134 496.6
C 5 218 35636 67.47 2126 2134 496.6
D 7 238 5131135 10214.68 2078 2016 502.1
D 5 222 1011250 2009.9 2078 2016 502.1
D 10 70 232254 458.52 2078 2016 502.1

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