ASTROSAT CZTI

Data Quality Report

Orbit 31800

Creation date: 2024-06-27T20:32:53.554676
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/AS1T04_041T01_9000004642_31800cztM0_level2.evt modeM0/AS1T04_041T01_9000004642_31800cztM0_level2_quad_clean.evt
Size (bytes)940,291,20088,447,680
Size896.7 MB 84.4 MB
Events in quadrant A13,652,866321,899
Events in quadrant B5,341,019659,245
Events in quadrant C4,352,124629,073
Events in quadrant D4,693,453614,537

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0230
B0230
C0230
D0230

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0449972
B0204322
C0173372
D0184622

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01360
B01360
C01360
D01360

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6471564087.158090%
B64712193.384330%
C64723505.407911%
D64721452.240420%

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 8826 6473 3688 3688 41.79% 56.98%
B 8826 6473 13 13 0.15% 0.20%
C 8827 6474 106 106 1.20% 1.64%
D 8827 6474 17 17 0.19% 0.26%

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 0 13 11704331 118151.01 503 496 99.1
A 13 6 7813 73.87 503 496 99.1
A 13 254 6144 57.02 503 496 99.1
B 6 159 1646377 9614.24 910 891 171.2
B 10 245 81880 473.2 910 891 171.2
B 0 190 22773 127.85 910 891 171.2
C 0 10 461412 2300.97 868 879 200.1
C 3 233 319862 1593.74 868 879 200.1
C 14 238 145846 724.3 868 879 200.1
D 8 195 826700 3854.41 904 884 214.3
D 12 227 295440 1374.81 904 884 214.3
D 2 250 65152 299.96 904 884 214.3

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