ASTROSAT CZTI

Data Quality Report

Orbit 37655

Creation date: 2024-06-27T21:42:43.103144
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_075T01_9000005342_37655cztM0_level2.evt modeM0/AS1A11_075T01_9000005342_37655cztM0_level2_quad_clean.evt
Size (bytes)694,425,60068,604,480
Size662.3 MB 65.4 MB
Events in quadrant A5,626,926416,815
Events in quadrant B2,884,347460,653
Events in quadrant C2,790,616464,054
Events in quadrant D9,345,524338,284

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01140
B01140
C01140
D01140

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0205953
B0124802
C0118232
D0317882

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0290
B0290
C0290
D0300

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A567469012.160733%
B5674781.374692%
C5674180.317237%
D5674263746.475150%

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 7137 5675 600 600 8.41% 10.57%
B 7136 5673 31 31 0.43% 0.55%
C 7136 5673 11 11 0.15% 0.19%
D 7136 5673 2587 2587 36.25% 45.60%

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 15 222 2851391 23276.17 608 596 122.5
A 10 83 308010 2509.97 608 596 122.5
A 9 143 77196 625.42 608 596 122.5
B 5 172 129125 1045.23 636 617 122.9
B 5 255 98158 793.35 636 617 122.9
B 5 200 45203 362.64 636 617 122.9
C 15 214 259206 1778.75 626 630 145.4
C 0 10 54083 367.7 626 630 145.4
C 14 254 25287 169.62 626 630 145.4
D 12 227 7097731 57246.13 510 496 124.0
D 13 249 94536 758.52 510 496 124.0
D 2 249 45635 364.09 510 496 124.0

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