ASTROSAT CZTI

Data Quality Report

Orbit 34839

Creation date: 2022-03-09T02:09:53.200773
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/AS1C07_005T01_9000004992_34839cztM0_level2.evt modeM0/AS1C07_005T01_9000004992_34839cztM0_level2_quad_clean.evt
Size (bytes)696,018,24084,317,760
Size663.8 MB 80.4 MB
Events in quadrant A4,400,728587,499
Events in quadrant B9,678,822446,667
Events in quadrant C3,002,094583,347
Events in quadrant D3,641,957566,244

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0220
B0220
C0220
D0230

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0166813
B0322592
C0121212
D0144542

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01080
B01080
C01080
D01080

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A52523747.121097%
B5252338964.527799%
C52521572.989337%
D52521082.056359%

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 7015 5253 315 315 4.49% 6.00%
B 7015 5252 3044 3044 43.39% 57.96%
C 7015 5253 127 127 1.81% 2.42%
D 7015 5253 111 111 1.58% 2.11%

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 2009506 16953.66 594 583 118.5
A 10 83 49593 413.6 594 583 118.5
A 15 237 28613 236.55 594 583 118.5
B 5 31 2314254 27231.07 447 435 85.0
B 5 15 2308337 27161.43 447 435 85.0
B 5 14 2290235 26948.39 447 435 85.0
C 0 10 385200 2890.42 576 581 133.1
C 15 214 235533 1765.67 576 581 133.1
C 0 207 78745 587.4 576 581 133.1
D 12 227 399968 2792.92 579 563 143.0
D 8 195 398898 2785.44 579 563 143.0
D 13 249 172479 1202.16 579 563 143.0

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