ASTROSAT CZTI

Data Quality Report

Orbit 55765

Creation date: 2026-01-19T16:31:08.623682
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_099T04_9000006540_55765cztM0_level2.fits modeM0/AS1A14_099T04_9000006540_55765cztM0_level2_quad_clean.evt
Size (bytes)622,131,84090,676,800
Size593.3 MB 86.5 MB
Events in quadrant A10,505,117406,460
Events in quadrant B3,036,709698,221
Events in quadrant C3,548,221629,113
Events in quadrant D5,431,318555,609

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0357542
B0138332
C0149702
D0206642

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0240
B0240
C0240
D0240

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01340
B01340
C01340
D01340

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6544269441.167482%
B6545691.054240%
C6545891.359817%
D65454837.379679%

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 8914 6545 2441 2441 27.38% 37.30%
B 8915 6546 3 3 0.03% 0.05%
C 8915 6547 73 73 0.82% 1.12%
D 8915 6546 435 435 4.88% 6.65%

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 15 32 4447358 29976.07 597 582 148.3
A 12 115 2994811 20184.34 597 582 148.3
A 4 249 237746 1598.74 597 582 148.3
B 7 0 95623 623.78 707 679 152.2
B 5 172 80937 527.29 707 679 152.2
B 10 247 22823 145.49 707 679 152.2
C 1 16 250064 1303.48 698 691 191.3
C 12 249 211723 1103.07 698 691 191.3
C 9 38 166546 866.93 698 691 191.3
D 11 129 2128693 10969.24 675 641 194.0
D 7 70 466798 2402.85 675 641 194.0
D 5 173 43295 219.86 675 641 194.0

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