ASTROSAT CZTI

Data Quality Report

Orbit 03840

Creation date: 2024-06-27T14:34:14.598171
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/AS1G05_189T01_9000000492_03840cztM0_level2.evt modeM0/AS1G05_189T01_9000000492_03840cztM0_level2_quad_clean.evt
Size (bytes)711,270,72082,932,480
Size678.3 MB 79.1 MB
Events in quadrant A5,824,026477,918
Events in quadrant B5,115,294481,296
Events in quadrant C5,564,155469,915
Events in quadrant D4,434,224463,513

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0232003
B0208922
C0230482
D0197172

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A040
B040
C040
D040

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01800
B01800
C01800
D01800

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A89206126.860987%
B89204685.246637%
C89205005.605381%
D89203814.271300%

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 9155 8921 138 138 1.51% 1.55%
B 9155 8921 10 10 0.11% 0.11%
C 9155 8920 52 52 0.57% 0.58%
D 9155 8921 41 41 0.45% 0.46%

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 15 234 1409146 6223.65 1096 1068 226.2
A 13 251 118719 520.01 1096 1068 226.2
A 8 15 40933 176.2 1096 1068 226.2
B 15 204 653248 2999.77 1110 1084 217.4
B 14 167 101748 463.03 1110 1084 217.4
B 4 81 25539 112.49 1110 1084 217.4
C 2 53 1358925 5444.93 1058 1061 249.4
C 1 16 35714 138.96 1058 1061 249.4
C 1 241 14594 54.27 1058 1061 249.4
D 13 248 186028 704.01 1069 1036 262.8
D 7 39 57888 216.36 1069 1036 262.8
D 8 112 39780 147.45 1069 1036 262.8

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
Veto Counter