ASTROSAT CZTI

Data Quality Report

Orbit 20200425_A07_018T08_9000003622_level2

Creation date: 2025-12-10T16:33:22.587020
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/AS1A07_018T08_9000003622cztM0_level2.fits modeM0/AS1A07_018T08_9000003622cztM0_level2_quad_clean.evt
Size (bytes)949,320,000793,520,640
Size905.3 MB 756.8 MB
Events in quadrant A5,932,0624,614,606
Events in quadrant B5,609,5744,563,811
Events in quadrant C5,572,3204,190,981
Events in quadrant D4,982,9344,010,563

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A019780
B019780
C019780
D019780

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02005870
B02113950
C02406350
D02520590

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01360
B01360
C01360
D01360

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A9702411271.161568%
B9702420582.121125%
C9702455015.669731%
D9702431263.221883%

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 110728 97014 0 0 0.00% 0.00%
B 110728 97005 0 0 0.00% 0.00%
C 110728 97006 0 0 0.00% 0.00%
D 110728 96998 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 5662 11.33 1543 1452 371.6
A 7 110 4798 9.01 1543 1452 371.6
A 0 30 4518 8.25 1543 1452 371.6
B 2 9 4672 11.18 1482 1414 291.4
B 2 8 3883 8.47 1482 1414 291.4
B 5 128 3709 7.88 1482 1414 291.4
C 12 241 3884 6.69 1474 1375 375.2
C 3 126 3792 6.44 1474 1375 375.2
C 12 250 3737 6.3 1474 1375 375.2
D 6 231 3531 5.96 1422 1296 375.1
D 10 189 3508 5.9 1422 1296 375.1
D 6 67 3466 5.78 1422 1296 375.1

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