ASTROSAT CZTI

Data Quality Report

Orbit 55939

Creation date: 2026-02-05T13:55:26.740237
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_030T02_9000006544_55939cztM0_level2.fits modeM0/AS1A14_030T02_9000006544_55939cztM0_level2_quad_clean.evt
Size (bytes)396,786,24088,179,840
Size378.4 MB 84.1 MB
Events in quadrant A3,890,243574,518
Events in quadrant B2,999,448622,628
Events in quadrant C3,454,936532,616
Events in quadrant D3,875,978521,257

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01220
B01220
C01220
D01220

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0100
B0100
C0100
D0100

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0157581
B0134901
C0146251
D0157151

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A60002133.550000%
B60001191.983333%
C60013525.865689%
D60011853.082820%

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 7055 6001 169 169 2.40% 2.82%
B 7055 6001 53 53 0.75% 0.88%
C 7056 6002 106 106 1.50% 1.77%
D 7056 6002 188 188 2.66% 3.13%

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 12 115 1195442 7515.75 632 615 159.0
A 3 14 140646 880.83 632 615 159.0
A 0 8 75125 468.69 632 615 159.0
B 5 185 441626 3317.79 622 601 132.9
B 0 229 22161 162.19 622 601 132.9
B 7 252 18349 133.52 622 601 132.9
C 12 252 656804 3997.12 593 586 164.2
C 14 80 204115 1239.73 593 586 164.2
C 5 80 82896 501.36 593 586 164.2
D 6 42 522030 2988.4 615 589 174.5
D 11 129 439908 2517.76 615 589 174.5
D 12 16 167283 955.33 615 589 174.5

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