ASTROSAT CZTI

Data Quality Report

Orbit 20210908_A09_131T01_9000004690_level2

Creation date: 2021-10-20T21:29:43.759487
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/AS1A09_131T01_9000004690cztM0_level2_bc.evt modeM0/AS1A09_131T01_9000004690cztM0_level2_quad_clean.evt
Size (bytes)10,507,979,5203,302,850,240
Size9.8 GB 3.1 GB
Events in quadrant A44,875,93021,984,401
Events in quadrant B110,273,96021,875,977
Events in quadrant C54,360,44821,307,054
Events in quadrant D94,739,35620,766,133

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A041930
B041840
C041990
D041940

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A04297530
B06588920
C04807780
D05920990

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02930
B02930
C02930
D02940

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A20623923581.143334%
B20556786214.193767%
C206119150937.322469%
D20597792554.493220%

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 285083 207248 13 13 0.00% 0.01%
B 285083 206545 446 446 0.16% 0.22%
C 285083 207013 277 277 0.10% 0.13%
D 285083 206937 530 530 0.19% 0.26%

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 12 189 654623 266.5 11155 11008 2415.1
A 13 6 480382 194.35 11155 11008 2415.1
A 15 174 479359 193.93 11155 11008 2415.1
B 6 159 55586956 26165.58 11130 10881 2124.0
B 5 172 4790998 2250.51 11130 10881 2124.0
B 10 245 2422970 1135.63 11130 10881 2124.0
C 0 10 5546599 2208.85 10570 10577 2506.3
C 3 233 5470682 2178.56 10570 10577 2506.3
C 14 254 1164041 460.23 10570 10577 2506.3
D 8 195 36316986 14484.4 10867 10549 2506.6
D 12 233 5230726 2082.58 10867 10549 2506.6
D 12 218 4136640 1646.1 10867 10549 2506.6

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