ASTROSAT CZTI

Data Quality Report

Orbit 57887

Creation date: 2026-06-10T02:36:25.239667
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_125T11_9000006582_57887cztM0_level2.fits modeM0/AS1A14_125T11_9000006582_57887cztM0_level2_quad_clean.evt
Size (bytes)388,347,84096,217,920
Size370.4 MB 91.8 MB
Events in quadrant A2,730,303644,087
Events in quadrant B3,178,374683,867
Events in quadrant C4,079,325586,698
Events in quadrant D3,895,320557,868

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01280
B01280
C01280
D01280

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0128262
B0138532
C0166232
D0158552

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0120
B0120
C0120
D0120

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A632170.110742%
B6321661.044139%
C63212463.891789%
D63221832.894654%

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 7506 6322 1 1 0.01% 0.02%
B 7506 6322 37 37 0.49% 0.59%
C 7506 6322 199 199 2.65% 3.15%
D 7507 6323 152 152 2.02% 2.40%

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 7 64 45582 263.54 689 673 170.4
A 3 14 9686 52.89 689 673 170.4
A 3 137 8259 44.52 689 673 170.4
B 2 249 79148 544.18 679 655 144.2
B 0 63 70515 484.33 679 655 144.2
B 10 247 69609 478.05 679 655 144.2
C 15 224 1181335 6659.35 649 643 177.3
C 14 254 104164 583.88 649 643 177.3
C 2 12 96799 542.34 649 643 177.3
D 8 240 618924 3352.25 647 616 184.4
D 12 110 168858 912.15 647 616 184.4
D 11 129 138271 746.32 647 616 184.4

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