ASTROSAT CZTI

Data Quality Report

Orbit 55051

Creation date: 2025-12-01T13:05:30.018141
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_025T01_9000006530_55051cztM0_level2.fits modeM0/AS1A14_025T01_9000006530_55051cztM0_level2_quad_clean.evt
Size (bytes)580,150,08095,621,760
Size553.3 MB 91.2 MB
Events in quadrant A3,256,690660,883
Events in quadrant B4,670,337664,601
Events in quadrant C3,342,594634,253
Events in quadrant D9,671,694456,213

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0149006
B0186754
C0148897
D03353514

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01400
B01400
C01400
D01400

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0130
B0130
C0130
D0140

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6877811.177839%
B68785437.894737%
C6877400.581649%
D6877188827.453832%

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 7904 6880 60 60 0.76% 0.87%
B 7904 6880 372 372 4.71% 5.41%
C 7904 6880 33 33 0.42% 0.48%
D 7904 6879 1650 1650 20.88% 23.99%

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 213297 1171.87 741 724 181.4
A 0 250 74298 405.6 741 724 181.4
A 7 160 54835 298.3 741 724 181.4
B 4 81 1704804 11062.4 710 684 154.0
B 5 185 109036 703.37 710 684 154.0
B 12 111 18733 117.17 710 684 154.0
C 13 3 148812 748.4 723 717 197.9
C 1 16 127989 643.17 723 717 197.9
C 6 223 79935 400.33 723 717 197.9
D 11 129 5947774 32742.4 631 600 181.6
D 11 176 552390 3037.9 631 600 181.6
D 10 181 150711 826.44 631 600 181.6

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