ASTROSAT CZTI

Data Quality Report

Orbit 35921

Creation date: 2022-06-09T01:49:59.066773
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/AS1A11_080T01_9000005146_35921cztM0_level2.evt modeM0/AS1A11_080T01_9000005146_35921cztM0_level2_quad_clean.evt
Size (bytes)848,283,840178,992,000
Size809.0 MB 170.7 MB
Events in quadrant A5,512,0131,198,757
Events in quadrant B6,303,3551,179,735
Events in quadrant C5,631,9761,180,949
Events in quadrant D7,504,6651,106,275

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0310
B0310
C0310
D0320

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02200
B02200
C02200
D02200

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0232184
B0257263
C0231483
D0296093

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A10924450.411937%
B109243042.782863%
C10924970.887953%
D109244514.128524%

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 13639 10926 26 26 0.19% 0.24%
B 13639 10926 198 198 1.45% 1.81%
C 13639 10926 66 66 0.48% 0.60%
D 13639 10926 355 355 2.60% 3.25%

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 287975 1092.74 1283 1259 262.4
A 9 143 220044 833.84 1283 1259 262.4
A 13 6 23636 85.28 1283 1259 262.4
B 5 172 1132054 4684.99 1256 1230 241.4
B 5 255 99115 405.54 1256 1230 241.4
B 0 213 67981 276.55 1256 1230 241.4
C 15 214 453633 1563.85 1238 1252 289.3
C 0 10 317100 1091.87 1238 1252 289.3
C 0 207 40612 136.07 1238 1252 289.3
D 12 227 787068 2645.58 1218 1188 297.1
D 12 6 500848 1682.05 1218 1188 297.1
D 8 195 485926 1631.82 1218 1188 297.1

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