ASTROSAT CZTI

Data Quality Report

Orbit 35502

Creation date: 2022-04-23T01:11:55.587437
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_097T22_9000005082_35502cztM0_level2.evt modeM0/AS1A11_097T22_9000005082_35502cztM0_level2_quad_clean.evt
Size (bytes)1,335,240,000211,642,560
Size1.2 GB 201.8 MB
Events in quadrant A8,686,5331,347,916
Events in quadrant B9,967,5721,337,097
Events in quadrant C9,832,9311,369,191
Events in quadrant D10,904,0591,285,140

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0470
B0470
C0470
D0480

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0359675
B0397934
C0385084
D0430134

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03160
B03160
C03160
D03160

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A155145403.480727%
B155149636.207297%
C155144572.945726%
D155147995.150187%

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 19748 15517 445 445 2.25% 2.87%
B 19748 15517 594 594 3.01% 3.83%
C 19748 15517 385 385 1.95% 2.48%
D 19748 15517 719 719 3.64% 4.63%

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 15 169 1581171 4486.6 1746 1712 352.0
A 10 83 312709 883.42 1746 1712 352.0
A 13 6 29771 79.7 1746 1712 352.0
B 5 172 1569321 4766.56 1722 1672 328.9
B 5 236 1402909 4260.57 1722 1672 328.9
B 5 200 89747 267.8 1722 1672 328.9
C 0 239 942428 2376.64 1722 1735 395.8
C 15 214 634780 1599.38 1722 1735 395.8
C 0 10 556739 1402.21 1722 1735 395.8
D 12 217 2353243 5672.23 1704 1653 414.6
D 13 249 799820 1925.24 1704 1653 414.6
D 8 195 215815 516.58 1704 1653 414.6

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