ASTROSAT CZTI

Data Quality Report

Orbit 16842

Creation date: 2024-06-27T17:28:30.098429
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/AS1A05_056T01_9000002498_16842cztM0_level2.evt modeM0/AS1A05_056T01_9000002498_16842cztM0_level2_quad_clean.evt
Size (bytes)1,348,807,680228,997,440
Size1.3 GB 218.4 MB
Events in quadrant A8,481,1991,455,605
Events in quadrant B9,028,1961,477,145
Events in quadrant C8,916,2561,388,232
Events in quadrant D13,177,6311,344,302

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0240
B0240
C0240
D0240

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03760
B03760
C03760
D03760

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0375645
B0382554
C0380044
D0517434

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A18438670.363380%
B18438990.536935%
C184381540.835232%
D184389665.239180%

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 20854 18443 3 3 0.01% 0.02%
B 20854 18443 5 5 0.02% 0.03%
C 20854 18443 1 1 0.00% 0.01%
D 20854 18443 658 658 3.16% 3.57%

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 9 143 47739 102.98 2196 2150 442.7
A 0 226 18890 37.81 2196 2150 442.7
A 3 137 16642 32.74 2196 2150 442.7
B 0 229 234429 548.09 2198 2144 423.8
B 3 64 110591 255.89 2198 2144 423.8
B 4 173 64443 147.0 2198 2144 423.8
C 14 238 322771 650.41 2110 2122 493.0
C 3 233 222062 446.13 2110 2122 493.0
C 0 207 90126 178.51 2110 2122 493.0
D 1 52 4569394 9058.52 2081 2024 504.2
D 5 222 588861 1163.88 2081 2024 504.2
D 2 234 57721 110.46 2081 2024 504.2

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