ASTROSAT CZTI

Data Quality Report

Orbit 57261

Creation date: 2026-04-29T00:16:39.198786
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_049T03_9000006570_57261cztM0_level2.fits modeM0/AS1A14_049T03_9000006570_57261cztM0_level2_quad_clean.evt
Size (bytes)454,582,08092,237,760
Size433.5 MB 88.0 MB
Events in quadrant A2,794,671634,126
Events in quadrant B3,103,565667,603
Events in quadrant C7,261,217492,142
Events in quadrant D3,175,675557,681

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0129322
B0137742
C0260042
D0140953

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0140
B0150
C0150
D0150

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01280
B01280
C01280
D01280

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6325210.332016%
B63251482.339921%
C6325132620.964427%
D6324701.106894%

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 7499 6324 2 2 0.03% 0.03%
B 7499 6324 81 81 1.08% 1.28%
C 7499 6324 1271 1271 16.95% 20.10%
D 7498 6324 60 60 0.80% 0.95%

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 4 249 61122 355.32 692 674 170.1
A 7 64 36386 209.92 692 674 170.1
A 13 254 9883 54.13 692 674 170.1
B 10 247 156417 1087.09 675 651 143.3
B 10 16 108721 754.22 675 651 143.3
B 7 252 74057 512.3 675 651 143.3
C 15 224 4668502 28513.96 599 594 163.7
C 14 254 101014 613.42 599 594 163.7
C 14 246 51088 308.44 599 594 163.7
D 2 249 179128 937.77 657 627 190.3
D 8 240 92605 483.21 657 627 190.3
D 2 31 80063 417.32 657 627 190.3

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