ASTROSAT CZTI

Data Quality Report

Orbit 36837

Creation date: 2024-06-27T21:32:11.899135
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_075T01_9000005244_36837cztM0_level2.evt modeM0/AS1A11_075T01_9000005244_36837cztM0_level2_quad_clean.evt
Size (bytes)730,025,28066,746,880
Size696.2 MB 63.7 MB
Events in quadrant A2,865,054490,601
Events in quadrant B12,746,488204,205
Events in quadrant C2,983,468474,484
Events in quadrant D3,151,574475,567

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01080
B01080
C01080
D01080

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0120613
B0414812
C0121522
D0129102

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0260
B0260
C0260
D0270

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A5354240.448263%
B5354483490.287635%
C5354691.288756%
D5354921.718341%

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 7117 5355 4 4 0.06% 0.07%
B 7116 5353 4596 4596 64.59% 85.86%
C 7117 5355 45 45 0.63% 0.84%
D 7117 5355 83 83 1.17% 1.55%

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 10 83 244767 1856.99 645 634 131.5
A 7 3 85401 644.78 645 634 131.5
A 13 248 20722 152.8 645 634 131.5
B 12 1 10775024 155752.86 359 350 69.2
B 5 200 115423 1663.43 359 350 69.2
B 5 172 100201 1443.39 359 350 69.2
C 15 214 244374 1686.96 624 630 144.5
C 0 10 206966 1428.06 624 630 144.5
C 14 254 41145 280.41 624 630 144.5
D 12 233 148114 948.07 632 616 155.6
D 2 153 142442 911.62 632 616 155.6
D 2 250 136701 874.71 632 616 155.6

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