ASTROSAT CZTI

Data Quality Report

Orbit 20211228_T04_091T01_9000004822_level2

Creation date: 2025-12-31T00:14:58.028667
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_091T01_9000004822cztM0_level2.fits modeM0/AS1T04_091T01_9000004822cztM0_level2_quad_clean.evt
Size (bytes)298,581,120295,332,480
Size284.7 MB 281.7 MB
Events in quadrant A1,771,9581,719,544
Events in quadrant B1,800,2041,831,070
Events in quadrant C1,875,4741,792,977
Events in quadrant D1,549,6121,557,149

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A06100
B06020
C06100
D06040

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0938690
B0758070
C0730810
D01188890

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01470
B01490
C01450
D01470

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A29710391213.167284%
B297759473.180521%
C297864531.520849%
D2957924948.431658%

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 44420 30021 0 0 0.00% 0.00%
B 44420 30162 0 0 0.00% 0.00%
C 44420 30159 0 0 0.00% 0.00%
D 44420 29893 0 0 0.00% 0.00%

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 9 19 1420 8.63 463 438 113.8
A 7 110 1412 8.56 463 438 113.8
A 0 29 1375 8.24 463 438 113.8
B 2 9 1516 11.15 477 458 94.9
B 3 80 1373 9.65 477 458 94.9
B 2 8 1213 7.96 477 458 94.9
C 1 81 1456 7.88 496 471 125.0
C 1 80 1443 7.78 496 471 125.0
C 3 202 1401 7.44 496 471 125.0
D 7 3 1191 6.68 444 410 117.0
D 4 160 1184 6.62 444 410 117.0
D 10 113 1141 6.25 444 410 117.0

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