ASTROSAT CZTI

Data Quality Report

Orbit 24905

Creation date: 2024-06-27T19:11:16.488533
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/AS1A08_003T15_9000003648_24905cztM0_level2.evt modeM0/AS1A08_003T15_9000003648_24905cztM0_level2_quad_clean.evt
Size (bytes)1,325,482,560237,571,200
Size1.2 GB 226.6 MB
Events in quadrant A9,325,6921,507,355
Events in quadrant B9,225,0741,523,877
Events in quadrant C9,271,2381,450,184
Events in quadrant D11,052,1871,421,293

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0398724
B0391664
C0394594
D0450384

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03840
B03840
C03840
D03840

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0230
B0230
C0230
D0230

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A187634282.281085%
B187643431.827968%
C187644672.488808%
D187644922.622042%

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 20968 18768 78 78 0.37% 0.42%
B 20969 18769 2 2 0.01% 0.01%
C 20969 18769 0 0 0.00% 0.00%
D 20969 18769 174 174 0.83% 0.93%

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 411519 878.09 2312 2260 466.1
A 13 254 29948 59.41 2312 2260 466.1
A 3 137 22121 42.61 2312 2260 466.1
B 0 189 71819 156.7 2300 2237 444.0
B 7 202 62456 135.62 2300 2237 444.0
B 12 111 56503 122.21 2300 2237 444.0
C 14 238 352803 672.53 2221 2232 521.3
C 7 247 228375 433.83 2221 2232 521.3
C 5 112 29145 51.63 2221 2232 521.3
D 1 52 1016779 1857.06 2252 2187 546.3
D 8 195 966521 1765.07 2252 2187 546.3
D 7 238 417360 759.91 2252 2187 546.3

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