ASTROSAT CZTI

Data Quality Report

Orbit 20181217_A05_198T01_9000002578_level2

Creation date: 2025-11-26T17:15:40.273261
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/AS1A05_198T01_9000002578cztM0_level2.fits modeM0/AS1A05_198T01_9000002578cztM0_level2_quad_clean.evt
Size (bytes)1,181,842,5601,089,423,360
Size1.1 GB 1.0 GB
Events in quadrant A7,197,4786,330,526
Events in quadrant B6,994,9886,462,966
Events in quadrant C7,029,5486,137,742
Events in quadrant D6,151,6205,645,338

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01730
B01730
C01730
D01730

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02784070
B02696410
C02562730
D02965250

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A024980
B024980
C024980
D024980

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A12285236482.969427%
B12285220461.665419%
C12285218731.524599%
D12285230472.480220%

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 139762 122824 0 0 0.00% 0.00%
B 139762 122840 0 0 0.00% 0.00%
C 139762 122844 0 0 0.00% 0.00%
D 139762 122824 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 6037 9.34 1877 1760 458.1
A 7 110 5784 8.79 1877 1760 458.1
A 9 19 5369 7.88 1877 1760 458.1
B 2 9 5773 10.9 1852 1760 368.2
B 2 8 4838 8.36 1852 1760 368.2
B 3 17 4625 7.78 1852 1760 368.2
C 1 80 5284 7.55 1855 1729 471.2
C 1 81 5238 7.45 1855 1729 471.2
C 12 241 4933 6.8 1855 1729 471.2
D 3 14 4580 6.4 1755 1593 467.1
D 3 31 4367 5.94 1755 1593 467.1
D 6 231 4351 5.9 1755 1593 467.1

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