ASTROSAT CZTI

Data Quality Report

Orbit 20917

Creation date: 2024-06-27T18:21:11.043395
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_9000003082_20917cztM0_level2.evt modeM0/AS1C04_001T01_9000003082_20917cztM0_level2_quad_clean.evt
Size (bytes)745,467,840212,832,000
Size710.9 MB 203.0 MB
Events in quadrant A6,082,3891,474,002
Events in quadrant B5,713,0411,476,420
Events in quadrant C5,017,5611,396,149
Events in quadrant D5,071,9611,392,738

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02080
B02080
C02080
D02080

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0270
B0270
C0270
D0270

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0244114
B0233102
C0212102
D0217802

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A102132122.075786%
B102142021.977678%
C102141461.429411%
D102141291.262972%

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 12873 10215 71 71 0.55% 0.70%
B 12873 10215 49 49 0.38% 0.48%
C 12873 10215 1 1 0.01% 0.01%
D 12873 10215 61 61 0.47% 0.60%

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 6 16 905140 3545.71 1298 1275 254.9
A 5 16 185672 723.36 1298 1275 254.9
A 0 226 11390 39.68 1298 1275 254.9
B 7 220 468253 1983.96 1277 1249 235.4
B 0 219 61629 256.51 1277 1249 235.4
B 4 216 59624 247.99 1277 1249 235.4
C 14 238 195349 700.95 1216 1221 276.9
C 9 54 42251 148.15 1216 1221 276.9
C 7 247 22396 76.46 1216 1221 276.9
D 1 52 195793 648.89 1252 1215 299.9
D 5 32 68137 223.18 1252 1215 299.9
D 2 234 42392 137.32 1252 1215 299.9

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