ASTROSAT CZTI

Data Quality Report

Orbit 36940

Creation date: 2024-06-27T21:33:23.689481
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/AS1A11_024T01_9000005250_36940cztM0_level2.evt modeM0/AS1A11_024T01_9000005250_36940cztM0_level2_quad_clean.evt
Size (bytes)479,393,28087,399,360
Size457.2 MB 83.4 MB
Events in quadrant A2,894,394592,578
Events in quadrant B3,410,326584,492
Events in quadrant C3,031,290572,569
Events in quadrant D4,819,452522,368

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0230
B0230
C0230
D0240

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01100
B01100
C01100
D01100

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0119633
B0136442
C0121812
D0179282

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A5347300.561062%
B53471372.562184%
C5347801.496166%
D534769312.960539%

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 7321 5348 8 8 0.11% 0.15%
B 7321 5348 88 88 1.20% 1.65%
C 7321 5348 59 59 0.81% 1.10%
D 7321 5348 640 640 8.74% 11.97%

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 10 83 250648 1877.78 662 653 133.1
A 13 248 46575 344.93 662 653 133.1
A 9 143 18045 130.64 662 653 133.1
B 0 190 135794 1098.86 646 632 123.0
B 5 184 135158 1093.69 646 632 123.0
B 0 219 112451 909.08 646 632 123.0
C 0 10 231815 1594.47 623 629 145.0
C 15 214 231635 1593.22 623 629 145.0
C 15 159 114164 783.04 623 629 145.0
D 12 17 1083182 7482.35 593 578 144.7
D 10 253 434111 2996.34 593 578 144.7
D 12 233 293112 2021.83 593 578 144.7

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