ASTROSAT CZTI

Data Quality Report

Orbit 56251

Creation date: 2026-02-20T02:33:34.971109
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_049T01_9000006552_56251cztM0_level2.fits modeM0/AS1A14_049T01_9000006552_56251cztM0_level2_quad_clean.evt
Size (bytes)835,479,36083,321,280
Size796.8 MB 79.5 MB
Events in quadrant A15,325,363249,680
Events in quadrant B4,243,749646,576
Events in quadrant C5,207,167569,515
Events in quadrant D5,564,638530,284

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01520
B01520
C01520
D01520

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0507780
B0180700
C0210740
D0218700

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A7562462461.147844%
B75621211.600106%
C75633805.024461%
D75624095.408622%

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 7848 7754 4032 4032 51.38% 52.00%
B 7848 7848 51 51 0.65% 0.65%
C 7849 7845 290 290 3.69% 3.70%
D 7848 7848 428 428 5.45% 5.45%

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 32 7307023 49012.46 591 575 149.1
A 8 176 4345869 29148.71 591 575 149.1
A 10 251 551908 3698.4 591 575 149.1
B 4 171 243430 1446.2 785 755 167.8
B 7 0 169302 1004.44 785 755 167.8
B 10 247 159258 944.58 785 755 167.8
C 12 254 767090 3668.94 754 746 208.9
C 5 250 621561 2972.21 754 746 208.9
C 12 252 336969 1609.7 754 746 208.9
D 8 129 1586734 7432.47 747 715 213.4
D 2 249 441083 2063.67 747 715 213.4
D 15 115 249747 1167.02 747 715 213.4

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