ASTROSAT CZTI

Data Quality Report

Orbit 51441

Creation date: 2025-04-02T12:33:17.835405
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/AS1A13_090T01_9000006458_51441cztM0_level2.fits modeM0/AS1A13_090T01_9000006458_51441cztM0_level2_quad_clean.evt
Size (bytes)1,004,304,96098,040,960
Size957.8 MB 93.5 MB
Events in quadrant A9,768,427677,758
Events in quadrant B4,911,361821,807
Events in quadrant C17,094,228222,779
Events in quadrant D4,774,466682,160

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0347251
B0201341
C0563761
D0201091

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A050
B050
C050
D050

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01640
B01640
C01640
D01640

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A8112117714.509369%
B81131702.095402%
C8113592773.055590%
D81131752.157032%

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 8647 8112 768 768 8.88% 9.47%
B 8648 8114 78 78 0.90% 0.96%
C 8647 8113 5639 5639 65.21% 69.51%
D 8648 8114 201 201 2.32% 2.48%

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 12 3 3299432 15759.59 843 821 209.3
A 12 250 1034218 4937.2 843 821 209.3
A 7 64 846547 4040.58 843 821 209.3
B 10 254 517755 2750.8 882 850 187.9
B 15 52 216238 1146.22 882 850 187.9
B 12 32 104917 553.81 882 850 187.9
C 4 12 11224680 91125.11 452 450 123.2
C 15 179 2654842 21549.97 452 450 123.2
C 0 176 510954 4144.58 452 450 123.2
D 3 12 594039 2504.5 852 819 236.9
D 7 96 135777 569.77 852 819 236.9
D 6 42 128052 537.16 852 819 236.9

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