ASTROSAT CZTI

Data Quality Report

Orbit 20181217_A05_182T03_9000002576_level2

Creation date: 2025-11-26T17:01:00.972006
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_182T03_9000002576cztM0_level2.fits modeM0/AS1A05_182T03_9000002576cztM0_level2_quad_clean.evt
Size (bytes)133,856,64054,696,960
Size127.7 MB 52.2 MB
Events in quadrant A873,636223,594
Events in quadrant B819,506218,089
Events in quadrant C821,346202,332
Events in quadrant D675,578147,146

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0268010
B0275730
C0264690
D0512540

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02560
B02560
C02560
D02560

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0390
B0390
C0390
D0390

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A124861751.401570%
B124861911.529713%
C124862041.633830%
D12486227418.212398%

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 16456 12486 0 0 0.00% 0.00%
B 16456 12486 0 0 0.00% 0.00%
C 16456 12486 0 0 0.00% 0.00%
D 16456 12485 0 0 0.00% 0.00%

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 0 29 861 11.46 227 216 56.3
A 7 110 690 8.42 227 216 56.3
A 0 30 667 8.01 227 216 56.3
B 2 9 599 8.82 217 210 44.1
B 14 254 561 7.96 217 210 44.1
B 5 255 545 7.6 217 210 44.1
C 1 80 620 7.3 216 205 56.8
C 1 81 602 6.99 216 205 56.8
C 3 126 566 6.35 216 205 56.8
D 7 3 494 6.07 193 177 52.3
D 6 231 486 5.91 193 177 52.3
D 6 38 486 5.91 193 177 52.3

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