ASTROSAT CZTI

Data Quality Report

Orbit 51915

Creation date: 2025-05-04T04:38:33.242348
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/AS1C09_011T05_9000006466_51915cztM0_level2.fits modeM0/AS1C09_011T05_9000006466_51915cztM0_level2_quad_clean.evt
Size (bytes)832,812,48076,037,760
Size794.2 MB 72.5 MB
Events in quadrant A5,495,903589,648
Events in quadrant B5,738,166581,154
Events in quadrant C5,660,646567,566
Events in quadrant D13,434,892115,795

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01280
B01280
C01280
D01280

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0208632
B0216162
C0213462
D0442762

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0130
B0140
C0140
D0140

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A64284206.533914%
B6428101015.712508%
C64276149.553446%
D6427527982.137856%

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 7563 6429 339 339 4.48% 5.27%
B 7563 6429 708 708 9.36% 11.01%
C 7562 6428 445 445 5.88% 6.92%
D 7561 6426 4121 4121 54.50% 64.13%

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 1017812 6107.95 660 642 166.5
A 7 64 575618 3452.64 660 642 166.5
A 15 174 210415 1259.65 660 642 166.5
B 4 171 1115267 8228.08 639 617 135.5
B 5 32 906395 6686.24 639 617 135.5
B 4 206 564716 4164.04 639 617 135.5
C 15 158 1013661 5610.18 653 648 180.6
C 15 231 470173 2600.28 653 648 180.6
C 15 248 250391 1383.11 653 648 180.6
D 15 94 8963501 107501.35 266 252 83.4
D 12 17 2081109 24956.9 266 252 83.4
D 3 12 642658 7704.74 266 252 83.4

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