ASTROSAT CZTI

Data Quality Report

Orbit 55843

Creation date: 2026-01-23T16:46:31.587917
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/AS1A14_127T10_9000006542_55843cztM0_level2.fits modeM0/AS1A14_127T10_9000006542_55843cztM0_level2_quad_clean.evt
Size (bytes)1,382,376,960257,065,920
Size1.3 GB 245.2 MB
Events in quadrant A14,702,3121,644,211
Events in quadrant B8,694,2681,823,899
Events in quadrant C8,175,9301,653,208
Events in quadrant D18,175,4651,393,139

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0569511
B0388751
C0390571
D0669811

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A070
B070
C070
D070

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03700
B03700
C03700
D03700

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A184119965.409809%
B184113351.819564%
C184111180.640921%
D18412220511.975885%

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 19116 18411 646 646 3.38% 3.51%
B 19116 18411 23 23 0.12% 0.12%
C 19116 18411 55 55 0.29% 0.30%
D 19116 18411 2122 2122 11.10% 11.53%

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 7 64 3233595 6818.3 1914 1866 474.0
A 0 8 1663621 3505.97 1914 1866 474.0
A 8 192 755160 1589.3 1914 1866 474.0
B 0 197 467048 1120.04 1919 1844 415.3
B 5 185 192020 457.87 1919 1844 415.3
B 0 213 129624 307.65 1919 1844 415.3
C 6 223 256061 490.8 1892 1873 517.9
C 4 192 97552 184.74 1892 1873 517.9
C 12 252 87315 164.98 1892 1873 517.9
D 11 129 7641125 14917.96 1801 1720 512.1
D 8 245 1801142 3513.85 1801 1720 512.1
D 3 12 1094039 2133.04 1801 1720 512.1

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