ASTROSAT CZTI

Data Quality Report

Orbit 19921

Creation date: 2024-06-27T18:08:49.027953
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/AS1A05_064T01_9000002964_19921cztM0_level2.evt modeM0/AS1A05_064T01_9000002964_19921cztM0_level2_quad_clean.evt
Size (bytes)744,065,280123,111,360
Size709.6 MB 117.4 MB
Events in quadrant A4,110,927828,295
Events in quadrant B3,954,229851,212
Events in quadrant C7,196,751782,266
Events in quadrant D6,757,483736,655

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0176602
B0170122
C0266482
D0255662

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01580
B01580
C01580
D01580

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A090
B090
C090
D090

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A76012072.723326%
B76011131.486646%
C7601125816.550454%
D7602127016.706130%

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 8526 7603 126 126 1.48% 1.66%
B 8526 7602 2 2 0.02% 0.03%
C 8526 7601 659 659 7.73% 8.67%
D 8527 7603 1061 1061 12.44% 13.96%

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 14 238 707364 3985.84 877 856 177.3
A 5 16 24246 131.96 877 856 177.3
A 0 226 7737 38.82 877 856 177.3
B 3 112 246097 1457.44 890 864 168.3
B 0 197 50924 297.51 890 864 168.3
B 7 220 50887 297.29 890 864 168.3
C 9 221 2445667 12820.04 819 824 190.7
C 4 254 1072242 5618.2 819 824 190.7
C 3 233 336126 1758.23 819 824 190.7
D 7 38 1891732 9670.33 807 783 195.5
D 2 184 779742 3983.6 807 783 195.5
D 7 238 521819 2664.58 807 783 195.5

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