ASTROSAT CZTI

Data Quality Report

Orbit 35928

Creation date: 2024-06-27T21:20:08.311522
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_080T01_9000005146_35928cztM0_level2.evt modeM0/AS1A11_080T01_9000005146_35928cztM0_level2_quad_clean.evt
Size (bytes)1,286,490,240168,140,160
Size1.2 GB 160.4 MB
Events in quadrant A8,967,9851,081,337
Events in quadrant B8,411,1731,085,959
Events in quadrant C7,498,1151,046,347
Events in quadrant D13,189,189960,673

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0610
B0610
C0610
D0610

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02700
B02700
C02700
D02700

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0347017
B0328943
C0296933
D0476783

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A132873132.355686%
B132885364.033715%
C132882051.542745%
D13288239418.016255%

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 19356 13291 210 210 1.08% 1.58%
B 19356 13291 362 362 1.87% 2.72%
C 19356 13291 153 153 0.79% 1.15%
D 19356 13291 2177 2177 11.25% 16.38%

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 1900217 5678.33 1685 1661 334.4
A 10 83 323719 963.23 1685 1661 334.4
A 9 143 187290 555.19 1685 1661 334.4
B 5 172 1647286 5439.83 1631 1596 302.5
B 5 255 192350 630.54 1631 1596 302.5
B 4 67 39369 124.86 1631 1596 302.5
C 0 10 592330 1617.75 1595 1614 365.1
C 15 214 549203 1499.64 1595 1614 365.1
C 0 207 138264 374.23 1595 1614 365.1
D 8 230 5181648 14419.93 1478 1441 359.2
D 13 249 484458 1344.55 1478 1441 359.2
D 8 195 469890 1304.0 1478 1441 359.2

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