ASTROSAT CZTI

Data Quality Report

Orbit 56676

Creation date: 2026-03-20T19:22:29.293771
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_083T06_9000006558_56676cztM0_level2.fits modeM0/AS1A14_083T06_9000006558_56676cztM0_level2_quad_clean.evt
Size (bytes)538,565,76087,462,720
Size513.6 MB 83.4 MB
Events in quadrant A3,726,745601,613
Events in quadrant B3,178,183657,111
Events in quadrant C8,663,751401,980
Events in quadrant D3,859,470531,581

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01340
B01340
C01340
D01340

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A070
B070
C070
D070

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0155651
B0137781
C0303781
D0159691

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A65291942.971359%
B6529841.286568%
C6530221033.843798%
D65302654.058193%

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 7279 6530 123 123 1.69% 1.88%
B 7279 6530 9 9 0.12% 0.14%
C 7280 6531 2058 2058 28.27% 31.51%
D 7280 6531 202 202 2.77% 3.09%

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 8 26 569691 3286.01 700 682 173.2
A 8 249 115103 660.78 700 682 173.2
A 10 251 109988 631.24 700 682 173.2
B 7 0 148799 986.55 696 670 150.1
B 4 21 55521 365.31 696 670 150.1
B 10 247 47136 309.47 696 670 150.1
C 15 230 5005000 32317.42 570 564 154.9
C 6 223 786806 5077.36 570 564 154.9
C 9 38 390107 2515.57 570 564 154.9
D 2 249 638238 3327.22 676 646 191.6
D 13 153 134131 696.58 676 646 191.6
D 3 12 102550 531.78 676 646 191.6

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