ASTROSAT CZTI

Data Quality Report

Orbit 55897

Creation date: 2026-01-27T06:53:20.662283
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_55897cztM0_level2.fits modeM0/AS1A14_030T02_9000006544_55897cztM0_level2_quad_clean.evt
Size (bytes)395,124,48095,094,720
Size376.8 MB 90.7 MB
Events in quadrant A3,508,180619,637
Events in quadrant B3,013,470671,224
Events in quadrant C3,256,068593,908
Events in quadrant D4,349,319546,793

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01320
B01320
C01320
D01320

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0140
B0140
C0150
D0150

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0149202
B0137262
C0145453
D0175922

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6414931.449953%
B6414921.434362%
C64131312.042726%
D64132754.288165%

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 7564 6415 60 60 0.79% 0.94%
B 7564 6415 27 27 0.36% 0.42%
C 7563 6413 78 78 1.03% 1.22%
D 7563 6414 243 243 3.21% 3.79%

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 3 14 302650 1791.18 674 656 168.6
A 15 32 235533 1393.1 674 656 168.6
A 4 206 174595 1031.67 674 656 168.6
B 0 199 89043 612.86 674 650 144.2
B 7 252 71381 490.4 674 650 144.2
B 0 153 61624 422.76 674 650 144.2
C 15 199 344883 1880.55 663 657 183.0
C 12 252 270620 1474.85 663 657 183.0
C 13 3 17986 94.67 663 657 183.0
D 8 245 569271 3087.73 654 625 184.2
D 8 160 452090 2451.44 654 625 184.2
D 2 31 363907 1972.61 654 625 184.2

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