ASTROSAT CZTI

Data Quality Report

Orbit 20211231_A11_065T11_9000004830_level2

Creation date: 2025-12-31T03:05:51.747811
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/AS1A11_065T11_9000004830cztM0_level2.fits modeM0/AS1A11_065T11_9000004830cztM0_level2_quad_clean.evt
Size (bytes)276,128,640238,034,880
Size263.3 MB 227.0 MB
Events in quadrant A1,718,7641,398,830
Events in quadrant B1,570,7401,281,275
Events in quadrant C1,669,5781,338,313
Events in quadrant D1,369,9841,157,720

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A06060
B06020
C06020
D06020

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0610360
B0809990
C0643280
D01104980

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0990
B0990
C0990
D0990

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A29573540.182599%
B2955721797.372196%
C295771480.500389%
D29544297910.083266%

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 45787 29623 0 0 0.00% 0.00%
B 45787 29580 0 0 0.00% 0.00%
C 45787 29614 0 0 0.00% 0.00%
D 45787 29487 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 9 19 1403 8.8 447 420 111.7
A 7 110 1395 8.73 447 420 111.7
A 0 29 1351 8.34 447 420 111.7
B 2 9 1397 12.11 416 397 82.6
B 3 80 1180 9.48 416 397 82.6
B 2 8 1162 9.26 416 397 82.6
C 1 81 1375 8.49 441 414 113.2
C 1 80 1323 8.03 441 414 113.2
C 3 187 1137 6.38 441 414 113.2
D 10 189 1012 6.22 392 358 105.0
D 4 160 1001 6.12 392 358 105.0
D 7 3 984 5.96 392 358 105.0

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