ASTROSAT CZTI

Data Quality Report

Orbit 56853

Creation date: 2026-04-01T13:09:48.791188
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_083T03_9000006562_56853cztM0_level2.fits modeM0/AS1A14_083T03_9000006562_56853cztM0_level2_quad_clean.evt
Size (bytes)493,698,24092,851,200
Size470.8 MB 88.5 MB
Events in quadrant A4,785,274586,014
Events in quadrant B5,139,576623,904
Events in quadrant C3,265,060601,898
Events in quadrant D4,579,327545,719

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0100
B0100
C0100
D0100

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01320
B01320
C01320
D01320

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0187241
B0196031
C0144221
D0180841

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A65086179.480639%
B650870810.878918%
C65091422.181595%
D65094256.529421%

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 7533 6509 495 495 6.57% 7.60%
B 7533 6508 469 469 6.23% 7.21%
C 7534 6509 102 102 1.35% 1.57%
D 7534 6509 377 377 5.00% 5.79%

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 3 62 1200160 7132.53 684 666 168.2
A 7 64 394139 2339.7 684 666 168.2
A 10 251 284957 1690.48 684 666 168.2
B 5 185 1682419 11800.06 668 645 142.5
B 10 16 462059 3237.48 668 645 142.5
B 5 172 52015 360.43 668 645 142.5
C 12 250 318020 1679.04 694 686 189.0
C 14 246 106059 557.54 694 686 189.0
C 14 254 38787 201.6 694 686 189.0
D 2 249 1323177 6967.11 680 651 189.8
D 8 240 398854 2097.75 680 651 189.8
D 3 176 51426 267.48 680 651 189.8

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