ASTROSAT CZTI

Data Quality Report

Orbit 51772

Creation date: 2025-04-24T14:10:01.380501
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_51772cztM0_level2.fits modeM0/AS1A13_090T01_9000006464_51772cztM0_level2_quad_clean.evt
Size (bytes)659,733,12087,690,240
Size629.2 MB 83.6 MB
Events in quadrant A4,266,449611,730
Events in quadrant B5,510,470634,484
Events in quadrant C4,607,496598,272
Events in quadrant D9,542,463365,718

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0110
B0110
C0110
D0110

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01280
B01280
C01280
D01280

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0170071
B0207521
C0178931
D0326431

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A63792774.342373%
B63796349.938862%
C63792584.044521%
D6380256440.188088%

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 7449 6380 131 131 1.76% 2.05%
B 7449 6379 375 375 5.03% 5.88%
C 7449 6380 198 198 2.66% 3.10%
D 7450 6380 2236 2236 30.01% 35.05%

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 2 143 373997 2178.41 704 687 171.4
A 7 206 290286 1689.92 704 687 171.4
A 12 3 140715 817.12 704 687 171.4
B 4 206 1601490 10926.76 683 658 146.5
B 4 174 408300 2782.43 683 658 146.5
B 10 44 195933 1332.88 683 658 146.5
C 15 218 388752 2035.42 692 687 190.7
C 12 2 379403 1986.39 692 687 190.7
C 1 243 220263 1151.69 692 687 190.7
D 11 129 6902112 44943.18 555 536 153.6
D 0 18 84487 546.69 555 536 153.6
D 7 159 79907 516.87 555 536 153.6

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