ASTROSAT CZTI

Data Quality Report

Orbit 20210720_A10_094T30_9000004566_level2

Creation date: 2025-12-27T17:42:38.799629
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_094T30_9000004566cztM0_level2.fits modeM0/AS1A10_094T30_9000004566cztM0_level2_quad_clean.evt
Size (bytes)332,570,880280,681,920
Size317.2 MB 267.7 MB
Events in quadrant A2,194,3601,713,749
Events in quadrant B1,602,0241,361,597
Events in quadrant C2,153,6641,671,053
Events in quadrant D1,893,4541,527,544

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0760
B0760
C0760
D0760

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0672950
B01391170
C0703500
D0882850

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A06600
B06600
C06600
D06600

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A323731340.413925%
B32373949129.317641%
C323737072.183919%
D323736662.057270%

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 39924 32372 0 0 0.00% 0.00%
B 39924 30628 0 0 0.00% 0.00%
C 39924 32368 0 0 0.00% 0.00%
D 39924 32360 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 0 29 2061 11.03 572 544 137.5
A 7 110 1696 8.38 572 544 137.5
A 9 19 1636 7.94 572 544 137.5
B 2 9 1272 10.1 425 408 85.5
B 3 80 1154 8.72 425 408 85.5
B 5 128 1066 7.69 425 408 85.5
C 1 81 1701 8.08 570 541 143.5
C 1 80 1664 7.82 570 541 143.5
C 3 126 1472 6.48 570 541 143.5
D 10 189 1449 6.65 541 499 142.9
D 15 47 1395 6.27 541 499 142.9
D 7 3 1362 6.04 541 499 142.9

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