ASTROSAT CZTI

Data Quality Report

Orbit 20220727_A11_087T05_9000005248_level2

Creation date: 2026-01-03T20:18:35.323042
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_087T05_9000005248cztM0_level2.fits modeM0/AS1A11_087T05_9000005248cztM0_level2_quad_clean.evt
Size (bytes)399,824,640374,590,080
Size381.3 MB 357.2 MB
Events in quadrant A2,403,8162,180,593
Events in quadrant B2,310,0122,189,358
Events in quadrant C2,369,1522,092,039
Events in quadrant D2,020,8781,877,846

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0900410
B0970030
C0934480
D01164100

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A08940
B08940
C08940
D08940

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01450
B01450
C01450
D01450

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A43760940.214808%
B437604381.000914%
C437603200.731261%
D4376024985.708410%

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 58307 43760 0 0 0.00% 0.00%
B 58307 43760 0 0 0.00% 0.00%
C 58307 43759 0 0 0.00% 0.00%
D 58307 43739 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 2009 8.99 627 587 158.2
A 7 110 1995 8.9 627 587 158.2
A 0 29 1905 8.33 627 587 158.2
B 2 9 1987 11.37 611 581 123.6
B 3 80 1816 9.99 611 581 123.6
B 3 17 1682 8.91 611 581 123.6
C 1 81 1983 8.65 627 589 161.1
C 1 80 1920 8.26 627 589 161.1
C 3 158 1628 6.45 627 589 161.1
D 3 14 1498 6.25 577 527 155.4
D 10 189 1484 6.16 577 527 155.4
D 7 3 1474 6.1 577 527 155.4

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