ASTROSAT CZTI

Data Quality Report

Orbit 20200131_A07_100T02_9000003476_level2

Creation date: 2021-09-02T11:51:12.792661
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/AS1A07_100T02_9000003476cztM0_level2_bc.evt modeM0/AS1A07_100T02_9000003476cztM0_level2_quad_clean.evt
Size (bytes)1,460,021,760555,523,200
Size1.4 GB 529.8 MB
Events in quadrant A7,539,3403,668,347
Events in quadrant B9,036,2223,727,659
Events in quadrant C10,041,8043,550,781
Events in quadrant D15,132,4713,397,582

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A07320
B07320
C07360
D07260

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0660
B0670
C0660
D0660

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0741920
B0806390
C0850880
D01011300

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A361582150.594613%
B361615021.388236%
C3616712963.583377%
D3612524836.873356%

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 42153 35756 4 4 0.01% 0.01%
B 42153 35748 15 15 0.04% 0.04%
C 42153 35761 57 57 0.14% 0.16%
D 42153 35760 644 644 1.53% 1.80%

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 13 254 59636 137.3 1938 1902 420.5
A 10 253 23205 50.66 1938 1902 420.5
A 4 2 14675 30.37 1938 1902 420.5
B 0 189 785088 2120.79 1960 1915 369.3
B 0 229 248844 668.67 1960 1915 369.3
B 0 230 130989 349.52 1960 1915 369.3
C 2 16 2297975 5161.61 1872 1867 444.8
C 8 208 253701 566.12 1872 1867 444.8
C 7 247 193533 430.86 1872 1867 444.8
D 1 52 6005914 13796.99 1872 1813 435.2
D 9 35 864105 1981.48 1872 1813 435.2
D 13 104 252624 576.35 1872 1813 435.2

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