ASTROSAT CZTI

Data Quality Report

Orbit 02820

Creation date: 2024-06-27T14:22:03.473808
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/AS1P01_999T99_9000000410_02820cztM0_level2.evt modeM0/AS1P01_999T99_9000000410_02820cztM0_level2_quad_clean.evt
Size (bytes)1,686,142,08061,090,560
Size1.6 GB 58.3 MB
Events in quadrant A8,926,688438,897
Events in quadrant B10,812,214438,481
Events in quadrant C13,993,596338,388
Events in quadrant D16,951,975222,931

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01180
B01180
C01180
D01180

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0120
B0120
C0120
D0120

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0306142
B0361951
C0460611
D0552411

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A5850801.367521%
B58502013.435897%
C5850248042.393162%
D5850453277.470085%

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 7000 5851 661 661 9.44% 11.30%
B 7000 5851 1891 1891 27.01% 32.32%
C 7000 5850 3561 3561 50.87% 60.87%
D 7000 5851 5459 5459 77.99% 93.30%

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 31 614371 1282.04 2068 2047 477.6
A 0 50 205794 426.59 2068 2047 477.6
A 0 117 37390 74.0 2068 2047 477.6
B 3 10 863468 1756.77 2108 2084 490.3
B 3 11 671929 1366.13 2108 2084 490.3
B 3 12 262050 530.19 2108 2084 490.3
C 0 219 4111426 8905.63 1587 1641 461.5
C 1 16 1315330 2846.68 1587 1641 461.5
C 1 192 1232313 2666.78 1587 1641 461.5
D 0 226 6501680 17140.67 1250 1265 379.2
D 1 7 3921374 10336.77 1250 1265 379.2
D 1 31 853829 2248.09 1250 1265 379.2

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
Veto Counter