ASTROSAT CZTI

Data Quality Report

Orbit 20251024_A14_127T09_9000006520_level2

Creation date: 2025-11-12T22:23:11.908748
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/AS1A14_127T09_9000006520cztM0_level2.fits modeM0/AS1A14_127T09_9000006520cztM0_level2_quad_clean.evt
Size (bytes)4,475,643,8401,992,015,360
Size4.2 GB 1.9 GB
Events in quadrant A26,866,1286,309,275
Events in quadrant B25,063,1106,674,181
Events in quadrant C24,971,8345,460,060
Events in quadrant D22,221,6465,477,480

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A013142260
B012911250
C015542610
D013795720

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0107840
B0107800
C0107760
D0107810

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A06030
B06040
C06040
D06040

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A531153185153.485813%
B531158235814.439545%
C531129456758.599606%
D531158231904.365933%

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 600521 531293 0 0 0.00% 0.00%
B 600521 530597 0 0 0.00% 0.00%
C 600521 529866 0 0 0.00% 0.00%
D 600522 530795 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 14 188 30617 10.13 7052 6468 2383.1
A 9 255 26862 8.56 7052 6468 2383.1
A 14 204 25017 7.78 7052 6468 2383.1
B 2 9 28790 14.65 6617 6230 1539.5
B 2 8 25838 12.74 6617 6230 1539.5
B 3 25 20591 9.33 6617 6230 1539.5
C 15 175 21518 6.84 6680 6054 2262.3
C 15 127 19736 6.05 6680 6054 2262.3
C 2 31 19604 5.99 6680 6054 2262.3
D 6 218 27806 10.46 6367 5632 2119.0
D 15 11 21438 7.46 6367 5632 2119.0
D 3 30 20181 6.87 6367 5632 2119.0

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