ASTROSAT CZTI

Data Quality Report

Orbit 58643

Creation date: 2026-07-30T23:25:08.021022
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_004T06_9000006594_58643cztM0_level2.fits modeM0/AS1A14_004T06_9000006594_58643cztM0_level2_quad_clean.evt
Size (bytes)529,047,36094,999,680
Size504.5 MB 90.6 MB
Events in quadrant A3,576,836655,083
Events in quadrant B4,709,709667,941
Events in quadrant C4,014,692624,312
Events in quadrant D6,794,465490,428

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A014932186
B01842090
C01621477
D024836300

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01280
B01280
C01280
D01280

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0120
B0120
C0120
D0120

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6287691.097503%
B62924296.818182%
C62911893.004292%
D6273131020.883150%

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 7483 6301 3 3 0.04% 0.05%
B 7484 6307 299 299 4.00% 4.74%
C 7485 6308 122 122 1.63% 1.93%
D 7477 6288 1081 1081 14.46% 17.19%

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 12 114 386323 2167.65 718 701 177.9
A 10 17 208331 1167.13 718 701 177.9
A 4 249 85657 477.55 718 701 177.9
B 2 249 781458 5308.5 689 664 147.1
B 5 185 605951 4115.26 689 664 147.1
B 8 234 237273 1608.67 689 664 147.1
C 15 217 529814 2749.37 696 689 192.5
C 12 252 460640 2389.94 696 689 192.5
C 12 249 201576 1043.82 696 689 192.5
D 2 249 3030072 16745.53 636 607 180.9
D 8 160 738757 4080.16 636 607 180.9
D 7 222 148425 817.07 636 607 180.9

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