ASTROSAT CZTI

Data Quality Report

Orbit 55865

Creation date: 2026-01-25T03:38:28.972278
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_55865cztM0_level2.fits modeM0/AS1A14_030T02_9000006544_55865cztM0_level2_quad_clean.evt
Size (bytes)547,024,32091,356,480
Size521.7 MB 87.1 MB
Events in quadrant A8,502,626478,831
Events in quadrant B3,381,918678,857
Events in quadrant C3,900,797586,291
Events in quadrant D3,944,864556,520

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01360
B01360
C01360
D01360

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0140
B0140
C0150
D0150

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0298902
B0148102
C0165752
D0167312

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6680175926.332335%
B6680671.002994%
C66802293.428144%
D66802694.026946%

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 7740 6681 1747 1747 22.57% 26.15%
B 7740 6681 31 31 0.40% 0.46%
C 7740 6681 186 186 2.40% 2.78%
D 7740 6681 224 224 2.89% 3.35%

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 5056986 33471.02 608 593 151.1
A 4 249 398900 2636.61 608 593 151.1
A 7 64 162551 1072.09 608 593 151.1
B 4 169 181210 1220.3 683 655 148.0
B 4 21 168049 1131.35 683 655 148.0
B 0 197 79345 531.83 683 655 148.0
C 15 199 413213 2248.07 666 660 183.5
C 12 254 205591 1116.7 666 660 183.5
C 6 223 197652 1073.44 666 660 183.5
D 11 129 877478 4672.36 665 636 187.7
D 2 62 99413 526.35 665 636 187.7
D 4 160 90528 479.0 665 636 187.7

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