ASTROSAT CZTI

Data Quality Report

Orbit 20181219_T03_067T01_9000002582_level2

Creation date: 2025-11-26T17:24:05.559344
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/AS1T03_067T01_9000002582cztM0_level2.fits modeM0/AS1T03_067T01_9000002582cztM0_level2_quad_clean.evt
Size (bytes)1,077,514,5601,000,258,560
Size1.0 GB 953.9 MB
Events in quadrant A6,633,6225,958,664
Events in quadrant B6,339,6605,960,083
Events in quadrant C6,476,3105,651,405
Events in quadrant D5,538,7545,081,856

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02429050
B02516970
C02346000
D03214710

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A022700
B022700
C022700
D022700

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01830
B01830
C01830
D01830

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A11150523582.114703%
B11150517161.538944%
C11150514281.280660%
D11150574596.689386%

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 129635 111503 0 0 0.00% 0.00%
B 129635 111499 0 0 0.00% 0.00%
C 129635 111503 0 0 0.00% 0.00%
D 129633 111471 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 6307 10.99 1731 1628 425.8
A 7 110 5427 8.92 1731 1628 425.8
A 0 30 5163 8.3 1731 1628 425.8
B 2 9 5044 10.66 1681 1609 322.1
B 2 8 4285 8.31 1681 1609 322.1
B 3 17 4233 8.15 1681 1609 322.1
C 12 241 4444 6.59 1712 1606 431.0
C 3 126 4440 6.58 1712 1606 431.0
C 2 191 4246 6.13 1712 1606 431.0
D 3 14 4016 6.16 1583 1444 417.5
D 6 231 4008 6.14 1583 1444 417.5
D 7 3 3900 5.88 1583 1444 417.5

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