ASTROSAT CZTI

Data Quality Report

Orbit 20170201_G06_137T01_9000001000_level2

Creation date: 2025-11-09T08:46:32.569294
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/AS1G06_137T01_9000001000cztM0_level2.fits modeM0/AS1G06_137T01_9000001000cztM0_level2_quad_clean.evt
Size (bytes)332,115,840281,232,000
Size316.7 MB 268.2 MB
Events in quadrant A1,963,5581,546,431
Events in quadrant B1,954,0161,594,889
Events in quadrant C1,982,1721,522,745
Events in quadrant D1,702,5481,396,400

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0530
B0530
C0530
D0530

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0793840
B0751270
C0757100
D0795510

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A07260
B07260
C07260
D07240

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A357568832.469516%
B357494071.138493%
C357592870.802595%
D357545321.487945%

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 41084 35694 0 0 0.00% 0.00%
B 41084 35776 0 0 0.00% 0.00%
C 41084 35783 0 0 0.00% 0.00%
D 41084 35777 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 1989 11.41 511 476 132.6
A 7 110 1646 8.82 511 476 132.6
A 0 30 1586 8.37 511 476 132.6
B 2 9 1684 11.41 515 489 104.8
B 12 226 1339 8.11 515 489 104.8
B 5 128 1333 8.06 515 489 104.8
C 1 81 1433 6.78 523 484 140.1
C 1 80 1406 6.58 523 484 140.1
C 3 158 1370 6.33 523 484 140.1
D 6 231 1283 6.35 485 440 132.8
D 3 14 1276 6.29 485 440 132.8
D 7 5 1243 6.05 485 440 132.8

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