ASTROSAT CZTI

Data Quality Report

Orbit 20151123_P01_156T01_9000000114_level2

Creation date: 2025-10-23T16:37:38.609007
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/AS1P01_156T01_9000000114cztM0_level2.fits modeM0/AS1P01_156T01_9000000114cztM0_level2_quad_clean.evt
Size (bytes)289,474,560199,488,960
Size276.1 MB 190.2 MB
Events in quadrant A1,686,148956,895
Events in quadrant B1,647,460972,164
Events in quadrant C1,668,038919,424
Events in quadrant D1,392,250819,308

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A07600
B07200
C06940
D07180

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0360
B0360
C0360
D0360

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01498600
B01545940
C01472780
D01567970

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A345853080.890559%
B341043871.134764%
C345552830.818984%
D3457019635.678334%

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 40872 34643 0 0 0.00% 0.00%
B 40872 34149 0 0 0.00% 0.00%
C 40872 34605 0 0 0.00% 0.00%
D 40872 34592 0 0 0.00% 0.00%

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 0 29 1582 11.2 436 406 105.0
A 7 110 1527 10.68 436 406 105.0
A 0 30 1220 7.75 436 406 105.0
B 2 9 1385 11.75 434 411 82.9
B 5 128 1106 8.38 434 411 82.9
B 10 225 1084 8.12 434 411 82.9
C 12 241 1165 6.71 441 403 113.6
C 2 191 1120 6.31 441 403 113.6
C 9 242 1084 5.99 441 403 113.6
D 6 114 976 6.35 398 362 96.8
D 6 231 976 6.35 398 362 96.8
D 11 82 975 6.33 398 362 96.8

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