ASTROSAT CZTI

Data Quality Report

Orbit 20185

Creation date: 2024-06-27T18:12:10.535987
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/AS1C04_001T01_9000002994_20185cztM0_level2.evt modeM0/AS1C04_001T01_9000002994_20185cztM0_level2_quad_clean.evt
Size (bytes)914,158,080233,464,320
Size871.8 MB 222.6 MB
Events in quadrant A5,776,8541,583,353
Events in quadrant B6,479,9971,568,786
Events in quadrant C7,713,0861,526,816
Events in quadrant D6,858,4431,517,240

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02560
B02560
C02560
D02560

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0130
B0130
C0130
D0130

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0259652
B0279462
C0314572
D0295403

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A12673410.323522%
B126741381.088843%
C126742121.672716%
D126732121.672848%

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 13918 12675 9 9 0.06% 0.07%
B 13919 12676 44 44 0.32% 0.35%
C 13919 12676 13 13 0.09% 0.10%
D 13918 12675 120 120 0.86% 0.95%

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 4 2 81103 267.03 1470 1432 298.4
A 0 253 18664 57.76 1470 1432 298.4
A 13 254 18043 55.67 1470 1432 298.4
B 0 197 249155 894.95 1460 1419 276.8
B 7 220 145343 519.93 1460 1419 276.8
B 4 171 84525 300.22 1460 1419 276.8
C 3 233 1971592 5973.49 1414 1420 329.8
C 14 238 217974 656.58 1414 1420 329.8
C 13 61 9807 25.43 1414 1420 329.8
D 9 1 556929 1599.27 1437 1395 347.4
D 7 238 324295 929.57 1437 1395 347.4
D 13 172 115325 327.98 1437 1395 347.4

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