ASTROSAT CZTI

Data Quality Report

Orbit 20210528_A10_055T01_9000004414_level2

Creation date: 2021-05-29T18:04:53.811373
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/AS1A10_055T01_9000004414cztM0_level2_bc.evt modeM0/AS1A10_055T01_9000004414cztM0_level2_quad_clean.evt
Size (bytes)3,075,396,480674,815,680
Size2.9 GB 643.6 MB
Events in quadrant A11,592,1044,565,194
Events in quadrant B23,308,7294,513,318
Events in quadrant C11,012,0344,296,308
Events in quadrant D44,105,4863,904,022

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0710
B0710
C0710
D0710

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01021550
B01415820
C01029390
D02041610

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A09380
B09380
C09380
D09380

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A460308941.942212%
B4603012852.791658%
C4603014883.232674%
D46030685714.896806%

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 53115 46031 26 26 0.05% 0.06%
B 53115 46031 7 7 0.01% 0.02%
C 53115 46030 10 10 0.02% 0.02%
D 53115 46031 3196 3196 6.02% 6.94%

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 13 1138552 1984.08 2683 2647 572.5
A 13 254 85854 145.34 2683 2647 572.5
A 8 192 82161 138.89 2683 2647 572.5
B 6 159 12457571 24656.56 2664 2610 505.1
B 6 36 153192 298.1 2664 2610 505.1
B 0 229 125851 243.98 2664 2610 505.1
C 3 233 471931 804.52 2509 2509 583.5
C 10 22 431228 734.76 2509 2509 583.5
C 0 10 222838 377.61 2509 2509 583.5
D 8 195 29604271 51996.61 2495 2424 569.3
D 10 253 1556874 2730.44 2495 2424 569.3
D 13 249 807308 1413.81 2495 2424 569.3

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