ASTROSAT CZTI

Data Quality Report

Orbit 57791

Creation date: 2026-06-03T16:27:46.150790
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_57791cztM0_level2.fits modeM0/AS1A14_083T16_9000006580_57791cztM0_level2_quad_clean.evt
Size (bytes)617,129,280101,266,560
Size588.5 MB 96.6 MB
Events in quadrant A3,224,790690,645
Events in quadrant B4,443,721712,681
Events in quadrant C10,549,858535,418
Events in quadrant D4,055,511615,569

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01460
B01460
C01460
D01460

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0149170
B0184880
C0364890
D0172980

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A7353120.163199%
B73533304.487964%
C7353186125.309398%
D73531061.441588%

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 7353 7353 2 2 0.03% 0.03%
B 7353 7353 250 250 3.40% 3.40%
C 7353 7353 1540 1540 20.94% 20.94%
D 7353 7353 100 100 1.36% 1.36%

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 3 128 180526 935.48 781 762 192.2
A 3 245 17605 87.65 781 762 192.2
A 3 137 9544 45.7 781 762 192.2
B 4 158 410512 2499.89 762 732 163.9
B 5 185 342647 2085.87 762 732 163.9
B 4 80 310290 1888.48 762 732 163.9
C 9 38 4324283 22941.73 696 689 188.5
C 15 224 2852055 15129.84 696 689 188.5
C 14 254 289129 1530.51 696 689 188.5
D 2 153 611928 2876.75 758 722 212.5
D 2 31 148684 696.41 758 722 212.5
D 3 12 80665 376.26 758 722 212.5

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