ASTROSAT CZTI

Data Quality Report

Orbit 55790

Creation date: 2026-01-20T12:13:00.248250
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_127T10_9000006542_55790cztM0_level2.fits modeM0/AS1A14_127T10_9000006542_55790cztM0_level2_quad_clean.evt
Size (bytes)650,206,08096,321,600
Size620.1 MB 91.9 MB
Events in quadrant A9,478,173526,641
Events in quadrant B4,030,182709,404
Events in quadrant C3,273,142635,476
Events in quadrant D6,744,990557,286

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0329863
B0165792
C0150912
D0249142

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0110
B0120
C0120
D0120

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01420
B01420
C01420
D01420

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6998168724.106888%
B69981121.600457%
C6998680.971706%
D69986759.645613%

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 7898 6999 1722 1722 21.80% 24.60%
B 7898 6999 50 50 0.63% 0.71%
C 7898 6999 55 55 0.70% 0.79%
D 7898 6999 697 697 8.83% 9.96%

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 15 32 3476755 20647.24 673 656 168.4
A 12 115 2865579 17016.99 673 656 168.4
A 8 192 261673 1550.38 673 656 168.4
B 5 172 558599 3541.14 729 701 157.5
B 7 0 424153 2687.77 729 701 157.5
B 0 173 59842 375.38 729 701 157.5
C 13 3 322719 1631.31 721 715 197.4
C 9 38 57577 288.07 721 715 197.4
C 12 250 33416 165.67 721 715 197.4
D 11 129 3333040 17083.48 690 662 195.1
D 3 12 371017 1898.63 690 662 195.1
D 8 245 97020 493.98 690 662 195.1

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