ASTROSAT CZTI

Data Quality Report

Orbit 56254

Creation date: 2026-02-20T11:48:08.408136
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_56254cztM0_level2.fits modeM0/AS1A14_049T01_9000006552_56254cztM0_level2_quad_clean.evt
Size (bytes)1,933,107,840200,312,640
Size1.8 GB 191.0 MB
Events in quadrant A34,873,148743,405
Events in quadrant B10,543,7931,444,046
Events in quadrant C11,314,2671,335,804
Events in quadrant D13,355,0471,225,912

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03900
B03900
C03900
D03900

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0130
B0130
C0130
D0130

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01168726
B0450774
C0475654
D0534244

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A19057933248.968883%
B190584522.371707%
C190585833.059083%
D1905810105.299612%

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 20731 19251 8068 8068 38.92% 41.91%
B 20732 19346 173 173 0.83% 0.89%
C 20732 19342 393 393 1.90% 2.03%
D 20732 19346 974 974 4.70% 5.03%

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 13961750 35328.24 1582 1545 395.2
A 8 176 8971822 22700.54 1582 1545 395.2
A 10 251 1608871 4067.56 1582 1545 395.2
B 5 185 665750 1574.97 1989 1914 421.5
B 4 171 376293 888.23 1989 1914 421.5
B 10 247 341868 806.55 1989 1914 421.5
C 12 254 1416026 2687.59 1929 1916 526.2
C 5 250 590053 1117.78 1929 1916 526.2
C 6 223 584563 1107.35 1929 1916 526.2
D 8 129 3373469 6244.22 1910 1827 540.0
D 2 249 1104990 2043.04 1910 1827 540.0
D 15 115 564233 1041.57 1910 1827 540.0

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