ASTROSAT CZTI

Data Quality Report

Orbit 35541

Creation date: 2022-04-25T13:21:43.471456
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_046T08_9000005088_35541cztM0_level2.evt modeM0/AS1A11_046T08_9000005088_35541cztM0_level2_quad_clean.evt
Size (bytes)533,643,84082,321,920
Size508.9 MB 78.5 MB
Events in quadrant A4,244,176502,127
Events in quadrant B4,021,725522,034
Events in quadrant C3,092,653557,150
Events in quadrant D4,419,921516,195

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0163803
B0158752
C0126712
D0170802

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01160
B01160
C01160
D01160

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0190
B0190
C0190
D0200

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A564357010.101010%
B564359110.473153%
C5643581.027822%
D56432754.873294%

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 7136 5644 458 458 6.42% 8.11%
B 7136 5644 360 360 5.04% 6.38%
C 7136 5644 50 50 0.70% 0.89%
D 7136 5644 255 255 3.57% 4.52%

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 15 169 1450664 12066.04 603 592 120.2
A 15 237 294048 2441.85 603 592 120.2
A 10 83 139117 1152.67 603 592 120.2
B 5 236 1288755 11362.09 590 575 113.4
B 5 172 270684 2382.43 590 575 113.4
B 0 245 28390 245.34 590 575 113.4
C 0 10 292109 2067.12 616 621 141.0
C 15 214 256891 1817.37 616 621 141.0
C 3 233 58275 408.86 616 621 141.0
D 12 235 1482123 10050.71 609 591 147.4
D 2 250 140674 950.32 609 591 147.4
D 8 195 128523 867.89 609 591 147.4

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