ASTROSAT CZTI

Data Quality Report

Orbit 18171

Creation date: 2024-06-27T17:46:09.895406
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_063T02_9000002708_18171cztM0_level2.evt modeM0/AS1A05_063T02_9000002708_18171cztM0_level2_quad_clean.evt
Size (bytes)749,174,400100,431,360
Size714.5 MB 95.8 MB
Events in quadrant A4,176,021630,483
Events in quadrant B4,244,089640,849
Events in quadrant C5,435,378614,931
Events in quadrant D8,277,616583,795

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A050
B050
C050
D050

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0178872
B0180282
C0217392
D0303692

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01700
B01700
C01700
D01700

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A8212961.169021%
B82122072.520701%
C82126397.781296%
D821293311.361422%

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 8767 8214 29 29 0.33% 0.35%
B 8767 8214 70 70 0.80% 0.85%
C 8767 8214 245 245 2.79% 2.98%
D 8767 8214 632 632 7.21% 7.69%

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 279149 1355.53 1010 988 205.2
A 4 2 11470 51.08 1010 988 205.2
A 0 226 8919 38.65 1010 988 205.2
B 4 171 174003 883.05 1004 976 195.9
B 0 189 57538 288.66 1004 976 195.9
B 7 220 31447 155.51 1004 976 195.9
C 4 254 1578815 7113.04 945 951 221.8
C 14 238 142691 638.97 945 951 221.8
C 8 128 11577 47.9 945 951 221.8
D 7 238 4216327 18025.12 953 924 233.9
D 13 168 152238 647.02 953 924 233.9
D 10 70 61641 259.63 953 924 233.9

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