ASTROSAT CZTI

Data Quality Report

Orbit 36776

Creation date: 2024-06-27T21:31:29.226884
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_087T05_9000005240_36776cztM0_level2.evt modeM0/AS1A11_087T05_9000005240_36776cztM0_level2_quad_clean.evt
Size (bytes)1,985,958,720159,716,160
Size1.8 GB 152.3 MB
Events in quadrant A7,540,4701,113,266
Events in quadrant B33,650,516540,670
Events in quadrant C8,759,9781,083,164
Events in quadrant D9,143,9491,019,594

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0323035
B01106204
C0353924
D0375024

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0440
B0440
C0440
D0450

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03200
B03200
C03200
D03200

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A15589350.224517%
B155891191876.451344%
C155892371.520303%
D155895523.540958%

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 19798 15592 6 6 0.03% 0.04%
B 19798 15590 10898 10898 55.05% 69.90%
C 19798 15592 224 224 1.13% 1.44%
D 19798 15591 508 508 2.57% 3.26%

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 536226 1490.46 1774 1740 358.6
A 7 16 56775 153.47 1774 1740 358.6
A 9 143 47236 126.87 1774 1740 358.6
B 12 1 28551413 133969.68 1125 1096 213.1
B 4 171 147942 689.06 1125 1096 213.1
B 5 172 136856 637.04 1125 1096 213.1
C 0 207 753884 1870.93 1725 1736 402.0
C 15 214 651981 1617.45 1725 1736 402.0
C 14 254 501334 1242.72 1725 1736 402.0
D 12 6 755873 1806.97 1700 1651 417.4
D 13 249 582846 1392.43 1700 1651 417.4
D 2 249 256051 609.49 1700 1651 417.4

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