ASTROSAT CZTI

Data Quality Report

Orbit 57039

Creation date: 2026-04-14T03:31:06.870552
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_083T14_9000006564_57039cztM0_level2.fits modeM0/AS1A14_083T14_9000006564_57039cztM0_level2_quad_clean.evt
Size (bytes)1,630,926,720344,142,720
Size1.5 GB 328.2 MB
Events in quadrant A17,157,1392,194,434
Events in quadrant B13,356,1082,414,551
Events in quadrant C11,939,6112,154,989
Events in quadrant D16,049,4421,991,773

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A04920
B04920
C04920
D04920

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0150
B0150
C0150
D0150

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0679083
B0569483
C0538613
D0648343

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A2417012885.328920%
B241707182.970625%
C241704201.737691%
D241709123.773273%

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 25760 24173 863 863 3.35% 3.57%
B 25760 24173 376 376 1.46% 1.56%
C 25760 24173 332 332 1.29% 1.37%
D 25760 24173 829 829 3.22% 3.43%

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 4 249 4378549 7013.54 2531 2468 623.9
A 4 159 1073522 1716.58 2531 2468 623.9
A 4 13 571936 912.69 2531 2468 623.9
B 5 185 1637455 3043.25 2528 2435 537.3
B 0 213 535777 992.7 2528 2435 537.3
B 10 16 453593 839.74 2528 2435 537.3
C 12 252 801229 1181.53 2484 2466 676.0
C 15 198 518741 763.67 2484 2466 676.0
C 14 254 407143 598.6 2484 2466 676.0
D 12 33 1538477 2221.21 2445 2339 691.6
D 2 249 1047958 1511.93 2445 2339 691.6
D 12 251 867324 1250.74 2445 2339 691.6

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