ASTROSAT CZTI

Data Quality Report

Orbit 51799

Creation date: 2025-04-26T09:13:18.271271
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/AS1A13_090T01_9000006464_51799cztM0_level2.fits modeM0/AS1A13_090T01_9000006464_51799cztM0_level2_quad_clean.evt
Size (bytes)651,202,56099,169,920
Size621.0 MB 94.6 MB
Events in quadrant A5,269,607649,647
Events in quadrant B6,007,242683,236
Events in quadrant C5,829,143619,475
Events in quadrant D6,466,028570,262

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0220
B0220
C0220
D0220

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01420
B01420
C01420
D01420

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0203372
B0226172
C0220992
D0239252

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A68903755.442671%
B689174110.753156%
C68915117.415469%
D68916829.896967%

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 9130 6892 348 348 3.81% 5.05%
B 9131 6893 493 493 5.40% 7.15%
C 9131 6892 446 446 4.88% 6.47%
D 9131 6892 674 674 7.38% 9.78%

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 7 64 990094 5368.38 741 723 184.3
A 11 3 228590 1236.42 741 723 184.3
A 12 3 204474 1105.56 741 723 184.3
B 10 128 911902 5781.78 731 705 157.6
B 5 32 429558 2721.18 731 705 157.6
B 12 32 382521 2422.72 731 705 157.6
C 15 218 822486 4176.52 718 713 196.8
C 10 22 796169 4042.76 718 713 196.8
C 13 3 585420 2971.67 718 713 196.8
D 11 129 1901030 9572.79 711 686 198.5
D 8 176 738946 3718.91 711 686 198.5
D 3 12 460990 2318.74 711 686 198.5

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