ASTROSAT CZTI

Data Quality Report

Orbit 20180726_A04_223T01_9000002258_level2

Creation date: 2025-11-23T18:20:34.309917
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/AS1A04_223T01_9000002258cztM0_level2.fits modeM0/AS1A04_223T01_9000002258cztM0_level2_quad_clean.evt
Size (bytes)998,922,240896,595,840
Size952.6 MB 855.1 MB
Events in quadrant A6,146,0845,243,954
Events in quadrant B5,787,6865,236,484
Events in quadrant C5,978,6604,976,679
Events in quadrant D5,212,6424,568,908

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A021260
B021260
C021260
D021260

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01620
B01620
C01620
D01620

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02162780
B02429860
C02256910
D02228320

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A10395910350.995585%
B10395934243.293606%
C10395910631.022518%
D10395912971.247607%

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 120544 103952 0 0 0.00% 0.00%
B 120544 103826 0 0 0.00% 0.00%
C 120544 103950 0 0 0.00% 0.00%
D 120544 103949 0 0 0.00% 0.00%

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 0 29 5879 11.07 1598 1491 396.5
A 7 110 4817 8.39 1598 1491 396.5
A 15 236 4584 7.8 1598 1491 396.5
B 2 9 4672 10.71 1530 1457 300.1
B 2 8 3963 8.35 1530 1457 300.1
B 3 17 3783 7.75 1530 1457 300.1
C 1 80 4553 7.56 1577 1465 408.2
C 1 81 4482 7.39 1577 1465 408.2
C 12 241 4129 6.53 1577 1465 408.2
D 3 14 3706 5.88 1489 1354 400.1
D 6 231 3698 5.86 1489 1354 400.1
D 7 3 3599 5.61 1489 1354 400.1

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