ASTROSAT CZTI

Data Quality Report

Orbit 31750

Creation date: 2024-06-27T20:30:06.431381
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/AS1A10_056T01_9000004598_31750cztM0_level2.evt modeM0/AS1A10_056T01_9000004598_31750cztM0_level2_quad_clean.evt
Size (bytes)338,137,92037,281,600
Size322.5 MB 35.6 MB
Events in quadrant A2,790,165201,328
Events in quadrant B2,778,146232,731
Events in quadrant C2,347,166231,078
Events in quadrant D2,098,327227,205

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0151004610
B0137033095
C0120652851
D0108132397

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A074
B062
C051
D040

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A08711
B08922
C09216
D08821

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A329451215.543412%
B32841394.232643%
C33192026.086171%
D3359300.893123%

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 4188 3454 208 208 4.97% 6.02%
B 4172 3521 46 46 1.10% 1.31%
C 4181 3523 25 25 0.60% 0.71%
D 4168 3548 3 3 0.07% 0.08%

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 1313881 16589.81 382 374 79.2
A 13 254 5658 66.74 382 374 79.2
A 3 137 4041 46.31 382 374 79.2
B 6 159 877264 10998.04 406 395 79.7
B 4 80 197404 2470.97 406 395 79.7
B 5 255 49081 610.64 406 395 79.7
C 3 233 391322 4109.28 396 398 95.1
C 0 10 321233 3372.52 396 398 95.1
C 14 238 67358 703.86 396 398 95.1
D 8 195 410772 4111.22 408 396 99.8
D 2 250 67940 676.67 408 396 99.8
D 12 233 61894 616.1 408 396 99.8

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