ASTROSAT CZTI

Data Quality Report

Orbit 20210724_T04_028T01_9000004584_level2

Creation date: 2021-07-26T18:15:08.358914
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/AS1T04_028T01_9000004584cztM0_level2_bc.evt modeM0/AS1T04_028T01_9000004584cztM0_level2_quad_clean.evt
Size (bytes)4,336,882,5601,033,663,680
Size4.0 GB 985.8 MB
Events in quadrant A19,868,5896,689,220
Events in quadrant B51,409,7966,204,727
Events in quadrant C20,491,0596,462,968
Events in quadrant D33,829,1956,156,897

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A017180
B017140
C017160
D017140

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01820360
B03089720
C01873980
D02266720

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01490
B01490
C01500
D01500

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A8450514241.685107%
B843921181714.002512%
C8455625703.039406%
D8454533964.016796%

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 112012 84651 45 45 0.04% 0.05%
B 112012 84447 1881 1881 1.68% 2.23%
C 112012 84707 68 68 0.06% 0.08%
D 112012 84681 754 754 0.67% 0.89%

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 2121282 2147.7 4589 4514 985.6
A 13 254 141249 138.73 4589 4514 985.6
A 0 226 29258 25.11 4589 4514 985.6
B 6 159 20638660 25426.54 4278 4175 811.5
B 12 1 12410287 15287.25 4278 4175 811.5
B 4 80 517036 631.97 4278 4175 811.5
C 0 10 1636956 1567.36 4415 4399 1041.6
C 3 233 1235282 1181.73 4415 4399 1041.6
C 10 22 211983 199.29 4415 4399 1041.6
D 8 195 10751486 10586.73 4433 4287 1015.2
D 12 218 2822186 2775.82 4433 4287 1015.2
D 13 249 1033008 1013.36 4433 4287 1015.2

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