ASTROSAT CZTI

Data Quality Report

Orbit 35815

Creation date: 2022-05-19T13:21:47.010760
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_146T01_9000005142_35815cztM0_level2.evt modeM0/AS1A09_146T01_9000005142_35815cztM0_level2_quad_clean.evt
Size (bytes)406,071,36067,063,680
Size387.3 MB 64.0 MB
Events in quadrant A2,566,078424,062
Events in quadrant B2,893,871423,555
Events in quadrant C2,745,744414,875
Events in quadrant D3,740,488405,462

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01060
B01060
C01060
D01060

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0110373
B0119962
C0112192
D0144312

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0250
B0250
C0250
D0260

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A517490.173947%
B5174691.333591%
C51741152.222652%
D51741743.362969%

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 7027 5175 4 4 0.06% 0.08%
B 7027 5175 39 39 0.56% 0.75%
C 7027 5175 91 91 1.30% 1.76%
D 7026 5174 187 187 2.66% 3.61%

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 10 83 158462 1319.61 588 574 119.6
A 15 169 84216 699.07 588 574 119.6
A 7 48 30222 247.79 588 574 119.6
B 5 172 203022 1813.23 583 567 111.7
B 5 255 123252 1098.79 583 567 111.7
B 4 232 99820 888.93 583 567 111.7
C 0 10 272192 2030.39 575 579 133.8
C 15 214 216959 1617.51 575 579 133.8
C 10 49 7688 53.14 575 579 133.8
D 7 223 489275 3442.38 575 559 142.0
D 1 52 274873 1932.19 575 559 142.0
D 2 250 202938 1425.5 575 559 142.0

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