ASTROSAT CZTI

Data Quality Report

Orbit 55832

Creation date: 2026-01-22T23:08:03.190985
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_55832cztM0_level2.fits modeM0/AS1A14_127T10_9000006542_55832cztM0_level2_quad_clean.evt
Size (bytes)1,221,632,640271,333,440
Size1.1 GB 258.8 MB
Events in quadrant A12,840,5561,683,792
Events in quadrant B9,379,3181,897,659
Events in quadrant C9,942,5391,706,219
Events in quadrant D11,541,0801,578,548

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0518342
B0428122
C0451872
D0490782

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A060
B060
C060
D060

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03960
B03960
C03960
D03960

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A1958112946.608447%
B195814192.139829%
C195814712.405393%
D195817703.932383%

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 20246 19582 916 916 4.52% 4.68%
B 20246 19583 186 186 0.92% 0.95%
C 20246 19582 352 352 1.74% 1.80%
D 20246 19582 523 523 2.58% 2.67%

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 8 1191818 2406.5 1985 1936 494.4
A 15 32 1071322 2162.8 1985 1936 494.4
A 12 115 859645 1734.69 1985 1936 494.4
B 5 185 661005 1537.8 2003 1925 428.6
B 0 213 297792 690.33 2003 1925 428.6
B 7 252 135583 311.86 2003 1925 428.6
C 13 3 1268576 2335.23 1975 1954 542.4
C 6 223 296967 543.91 1975 1954 542.4
C 12 252 266108 487.01 1975 1954 542.4
D 11 129 1333267 2413.92 1952 1866 551.6
D 5 38 633216 1144.68 1952 1866 551.6
D 3 12 513552 927.72 1952 1866 551.6

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