ASTROSAT CZTI

Data Quality Report

Orbit 20180801_G08_037T01_9000002264_level2

Creation date: 2025-11-23T19:33:19.681685
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/AS1G08_037T01_9000002264cztM0_level2.fits modeM0/AS1G08_037T01_9000002264cztM0_level2_quad_clean.evt
Size (bytes)321,926,400300,441,600
Size307.0 MB 286.5 MB
Events in quadrant A2,028,7621,831,785
Events in quadrant B1,914,1721,823,734
Events in quadrant C1,950,8341,725,418
Events in quadrant D1,670,0341,532,223

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0760
B0760
C0760
D0760

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0674670
B0705070
C0717960
D0826740

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A06500
B06500
C06500
D06500

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A318014921.547121%
B318016922.176032%
C318014151.304990%
D3180119786.219930%

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 39416 31795 0 0 0.00% 0.00%
B 39416 31796 0 0 0.00% 0.00%
C 39416 31794 0 0 0.00% 0.00%
D 39416 31789 0 0 0.00% 0.00%

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 0 29 1946 11.17 527 496 129.9
A 7 110 1663 8.99 527 496 129.9
A 0 30 1542 8.06 527 496 129.9
B 2 9 1589 11.05 506 486 99.8
B 2 8 1304 8.2 506 486 99.8
B 5 128 1298 8.14 506 486 99.8
C 12 241 1321 6.25 516 480 134.6
C 2 191 1299 6.08 516 480 134.6
C 9 188 1271 5.87 516 480 134.6
D 6 231 1270 6.52 477 435 128.0
D 7 3 1164 5.7 477 435 128.0
D 6 67 1164 5.7 477 435 128.0

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