ASTROSAT CZTI

Data Quality Report

Orbit 20914

Creation date: 2024-06-27T18:21:08.310869
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_20914cztM0_level2.evt modeM0/AS1C04_001T01_9000003082_20914cztM0_level2_quad_clean.evt
Size (bytes)1,268,458,560367,680,960
Size1.2 GB 350.6 MB
Events in quadrant A9,015,6692,498,997
Events in quadrant B9,630,8642,502,969
Events in quadrant C8,765,9872,436,198
Events in quadrant D9,720,4722,393,657

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A041834
B041419
C041428
D041630

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0448
B0447
C0435
D0447

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0423492701
B0448803526
C0417292776
D0456783230

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A18994980.515952%
B188901880.995236%
C189731510.795868%
D189312851.505467%

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 25143 19276 24 24 0.10% 0.12%
B 25144 19165 37 37 0.15% 0.19%
C 25143 19280 10 10 0.04% 0.05%
D 25143 19221 181 181 0.72% 0.94%

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 15 174 208244 462.25 2247 2204 445.7
A 6 16 86183 188.41 2247 2204 445.7
A 5 16 75356 164.12 2247 2204 445.7
B 7 220 465075 1125.96 2222 2170 411.1
B 0 219 167307 401.68 2222 2170 411.1
B 0 229 57516 134.62 2222 2170 411.1
C 14 238 342912 690.9 2145 2156 493.2
C 9 54 49247 95.48 2145 2156 493.2
C 13 61 15021 26.08 2145 2156 493.2
D 1 52 768752 1492.03 2158 2098 513.8
D 1 20 329808 637.78 2158 2098 513.8
D 13 174 323661 625.81 2158 2098 513.8

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