ASTROSAT CZTI

Data Quality Report

Orbit 20736

Creation date: 2024-06-27T18:18:57.899389
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/AS1A06_002T02_9000003064_20736cztM0_level2.evt modeM0/AS1A06_002T02_9000003064_20736cztM0_level2_quad_clean.evt
Size (bytes)1,302,779,520274,651,200
Size1.2 GB 261.9 MB
Events in quadrant A8,653,6721,812,458
Events in quadrant B8,973,2301,823,904
Events in quadrant C9,023,1251,703,317
Events in quadrant D11,531,1661,681,327

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0210
B0220
C0220
D0220

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0387126
B03933022
C03887716
D04718518

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03840
B03840
C03840
D03840

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A188391230.652901%
B188302081.104620%
C188332451.300908%
D188344642.463630%

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 29878 18844 4 4 0.01% 0.02%
B 29878 18843 24 24 0.08% 0.13%
C 29878 18843 0 0 0.00% 0.00%
D 29878 18842 208 208 0.70% 1.10%

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 6 240 23698 47.78 2242 2197 450.0
A 0 226 19279 37.96 2242 2197 450.0
A 3 137 18728 36.74 2242 2197 450.0
B 3 64 164747 383.36 2232 2175 424.1
B 12 111 52277 118.15 2232 2175 424.1
B 11 111 45687 102.61 2232 2175 424.1
C 14 238 331372 660.5 2139 2156 498.4
C 7 247 288522 574.53 2139 2156 498.4
C 3 233 65131 126.35 2139 2156 498.4
D 1 20 1433492 2748.3 2159 2095 520.8
D 1 52 1033385 1980.09 2159 2095 520.8
D 5 222 340227 649.22 2159 2095 520.8

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