ASTROSAT CZTI

Data Quality Report

Orbit 51509

Creation date: 2025-04-06T20:43:16.825967
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_51509cztM0_level2.fits modeM0/AS1A13_090T01_9000006458_51509cztM0_level2_quad_clean.evt
Size (bytes)814,259,52084,813,120
Size776.5 MB 80.9 MB
Events in quadrant A6,052,571583,491
Events in quadrant B5,794,695642,178
Events in quadrant C4,115,753619,978
Events in quadrant D13,667,335262,032

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0222431
B0216901
C0165781
D0452081

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0110
B0110
C0110
D0110

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01340
B01340
C01340
D01340

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A659886713.140346%
B659980612.213972%
C65992283.455069%
D6599399460.524322%

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 7718 6599 685 685 8.88% 10.38%
B 7719 6600 551 551 7.14% 8.35%
C 7719 6600 156 156 2.02% 2.36%
D 7719 6600 4017 4017 52.04% 60.86%

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 15 174 1461541 8512.45 704 685 171.6
A 12 250 730459 4252.41 704 685 171.6
A 8 43 320618 1864.26 704 685 171.6
B 5 172 1898559 12464.24 711 686 152.3
B 2 208 288815 1892.28 711 686 152.3
B 15 52 269276 1763.96 711 686 152.3
C 15 1 297972 1536.82 712 705 193.4
C 12 252 202993 1045.79 712 705 193.4
C 12 249 184670 951.06 712 705 193.4
D 8 176 9605142 68217.17 504 484 140.8
D 11 176 678102 4812.79 504 484 140.8
D 8 192 508295 3606.73 504 484 140.8

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