ASTROSAT CZTI

Data Quality Report

Orbit 20200224_A07_027T03_9000003528_level2

Creation date: 2025-12-09T13:36:52.140672
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_027T03_9000003528cztM0_level2.fits modeM0/AS1A07_027T03_9000003528cztM0_level2_quad_clean.evt
Size (bytes)375,347,520262,290,240
Size358.0 MB 250.1 MB
Events in quadrant A2,369,6721,424,586
Events in quadrant B2,257,4381,436,593
Events in quadrant C2,280,7401,352,341
Events in quadrant D1,900,6141,169,495

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A07580
B07580
C07580
D07580

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0775430
B0792130
C0829310
D01339870

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0720
B0720
C0720
D0720

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A372542560.687175%
B372544861.304558%
C372548642.319214%
D3725427177.293177%

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 44404 37254 0 0 0.00% 0.00%
B 44404 37253 0 0 0.00% 0.00%
C 44404 37255 0 0 0.00% 0.00%
D 44404 37234 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 2221 10.67 616 580 153.8
A 7 110 1896 8.55 616 580 153.8
A 9 19 1770 7.73 616 580 153.8
B 2 9 1867 10.86 598 574 119.1
B 2 8 1548 8.18 598 574 119.1
B 3 17 1520 7.95 598 574 119.1
C 1 81 1737 7.62 601 564 154.0
C 1 80 1733 7.59 601 564 154.0
C 12 241 1569 6.53 601 564 154.0
D 3 14 1385 6.17 542 496 144.1
D 6 231 1347 5.9 542 496 144.1
D 10 113 1345 5.89 542 496 144.1

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