ASTROSAT CZTI

Data Quality Report

Orbit 34894

Creation date: 2022-03-12T22:55:29.417439
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/AS1T04_077T01_9000004994_34894cztM0_level2.evt modeM0/AS1T04_077T01_9000004994_34894cztM0_level2_quad_clean.evt
Size (bytes)1,330,297,920224,553,600
Size1.2 GB 214.2 MB
Events in quadrant A7,190,3921,481,543
Events in quadrant B11,404,2831,439,024
Events in quadrant C8,020,7151,460,814
Events in quadrant D12,627,4711,349,723

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0550
B0550
C0550
D0550

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0314625
B0439454
C0325614
D0481844

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03200
B03200
C03200
D03200

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A15499160.103232%
B1549911007.097232%
C15499990.638751%
D154996254.032518%

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 21023 15503 0 0 0.00% 0.00%
B 21023 15502 841 841 4.00% 5.43%
C 21023 15503 78 78 0.37% 0.50%
D 21023 15503 580 580 2.76% 3.74%

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 131077 354.55 1818 1778 364.7
A 13 6 27137 69.54 1818 1778 364.7
A 13 254 24651 62.72 1818 1778 364.7
B 4 171 2260824 6668.0 1764 1713 338.8
B 5 172 1274814 3757.69 1764 1713 338.8
B 0 190 497604 1463.67 1764 1713 338.8
C 15 214 696684 1699.21 1766 1776 409.0
C 0 10 262524 637.59 1766 1776 409.0
C 0 207 108360 260.62 1766 1776 409.0
D 8 195 2812465 6581.51 1743 1697 427.1
D 1 52 848596 1983.04 1743 1697 427.1
D 7 223 520332 1214.4 1743 1697 427.1

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