ASTROSAT CZTI

Data Quality Report

Orbit 20220108_A11_034T02_9000004856_level2

Creation date: 2025-12-31T08:28:02.765393
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/AS1A11_034T02_9000004856cztM0_level2.fits modeM0/AS1A11_034T02_9000004856cztM0_level2_quad_clean.evt
Size (bytes)112,060,80090,469,440
Size106.9 MB 86.3 MB
Events in quadrant A686,036508,465
Events in quadrant B651,060501,224
Events in quadrant C664,108474,619
Events in quadrant D557,256419,421

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0410
B0410
C0410
D0410

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02480
B02480
C02480
D02480

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0268470
B0284140
C0270920
D0409900

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A12073930.770314%
B120732762.286093%
C120731150.952539%
D120738236.816864%

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 16162 12073 0 0 0.00% 0.00%
B 16162 12073 0 0 0.00% 0.00%
C 16162 12071 0 0 0.00% 0.00%
D 16162 12056 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 29 562 8.54 179 168 46.2
A 9 19 551 8.3 179 168 46.2
A 7 110 529 7.82 179 168 46.2
B 2 9 570 11.24 172 164 36.1
B 3 80 542 10.46 172 164 36.1
B 2 8 480 8.75 172 164 36.1
C 3 187 471 6.61 176 165 46.3
C 7 233 434 5.81 176 165 46.3
C 1 65 431 5.75 176 165 46.3
D 10 189 421 6.32 159 145 43.7
D 4 160 413 6.14 159 145 43.7
D 6 231 408 6.02 159 145 43.7

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