ASTROSAT CZTI

Data Quality Report

Orbit 56276

Creation date: 2026-02-23T21:41:05.768431
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_049T01_9000006552_56276cztM0_level2.fits modeM0/AS1A14_049T01_9000006552_56276cztM0_level2_quad_clean.evt
Size (bytes)828,806,40068,650,560
Size790.4 MB 65.5 MB
Events in quadrant A15,597,15533,857
Events in quadrant B3,471,731619,303
Events in quadrant C4,993,415510,156
Events in quadrant D6,149,832493,674

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01240
B01240
C01240
D01240

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0100
B0100
C0100
D0100

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0503941
B0145051
C0190771
D0224051

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6034576195.475638%
B60332403.978120%
C603369111.453671%
D60345128.485250%

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 7034 6034 5561 5561 79.06% 92.16%
B 7032 6032 105 105 1.49% 1.74%
C 7033 6034 524 524 7.45% 8.68%
D 7034 6035 623 623 8.86% 10.32%

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 6909651 114528.4 234 228 60.3
A 15 32 4289232 71093.17 234 228 60.3
A 8 176 2017233 33433.23 234 228 60.3
B 5 185 434552 3125.3 645 622 138.8
B 8 128 104829 750.53 645 622 138.8
B 0 63 86613 619.33 645 622 138.8
C 12 254 1765572 10749.35 597 592 164.2
C 13 3 454368 2763.65 597 592 164.2
C 12 252 171205 1039.09 597 592 164.2
D 7 77 2035031 11454.33 628 599 177.6
D 5 32 782943 4404.78 628 599 177.6
D 2 249 256693 1441.87 628 599 177.6

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