ASTROSAT CZTI

Data Quality Report

Orbit 20170926_A03_071T01_9000001562_level2

Creation date: 2021-08-27T19:39:31.318824
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/AS1A03_071T01_9000001562cztM0_level2_bc.evt modeM0/AS1A03_071T01_9000001562cztM0_level2_quad_clean.evt
Size (bytes)2,468,450,880689,348,160
Size2.3 GB 657.4 MB
Events in quadrant A18,056,1884,230,777
Events in quadrant B23,363,8984,242,706
Events in quadrant C10,935,4014,534,779
Events in quadrant D18,760,3504,201,693

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0880
B0880
C0880
D0880

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01408900
B01657200
C01108200
D01382040

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A010880
B010880
C010880
D010880

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A5344933796.321914%
B53449588311.006754%
C534494900.916762%
D5345019953.732460%

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 61554 53449 387 387 0.63% 0.72%
B 61555 53448 284 284 0.46% 0.53%
C 61554 53452 8 8 0.01% 0.01%
D 61554 53448 458 458 0.74% 0.86%

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 8 5 7198533 12586.13 2666 2618 571.7
A 15 174 261443 452.7 2666 2618 571.7
A 8 15 143906 247.12 2666 2618 571.7
B 4 239 8136689 16298.72 2659 2592 499.1
B 0 85 2206127 4415.34 2659 2592 499.1
B 15 204 1169978 2339.15 2659 2592 499.1
C 14 234 164737 269.5 2746 2716 601.2
C 8 222 20040 28.82 2746 2716 601.2
C 13 61 16668 23.21 2746 2716 601.2
D 13 138 2241752 3649.71 2697 2607 613.5
D 8 195 1592007 2590.66 2697 2607 613.5
D 9 85 1137985 1850.62 2697 2607 613.5

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