ASTROSAT CZTI

Data Quality Report

Orbit 57776

Creation date: 2026-06-02T18:14:16.066840
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_083T16_9000006580_57776cztM0_level2.fits modeM0/AS1A14_083T16_9000006580_57776cztM0_level2_quad_clean.evt
Size (bytes)1,152,708,480228,375,360
Size1.1 GB 217.8 MB
Events in quadrant A7,703,4101,520,775
Events in quadrant B8,083,8081,633,647
Events in quadrant C17,235,9291,299,695
Events in quadrant D8,399,5601,348,924

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03240
B03240
C03240
D03240

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0347951
B0355721
C0625081
D0366601

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0100
B0100
C0100
D0100

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A161161300.806652%
B161171691.048582%
C16117217313.482658%
D161172881.786933%

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 25221 16118 26 26 0.10% 0.16%
B 25221 16119 37 37 0.15% 0.23%
C 25221 16119 1600 1600 6.34% 9.93%
D 25221 16119 226 226 0.90% 1.40%

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 3 14 964803 2332.24 1692 1650 413.0
A 3 128 112637 268.75 1692 1650 413.0
A 4 158 31372 71.97 1692 1650 413.0
B 4 80 687998 1950.51 1675 1614 351.9
B 5 185 197622 557.0 1675 1614 351.9
B 4 171 102431 286.49 1675 1614 351.9
C 9 38 7606086 17756.69 1582 1565 428.3
C 15 224 2723427 6355.6 1582 1565 428.3
C 14 254 185317 429.06 1582 1565 428.3
D 9 102 351133 752.72 1645 1569 464.4
D 8 160 282958 605.92 1645 1569 464.4
D 3 224 272034 582.39 1645 1569 464.4

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