ASTROSAT CZTI

Data Quality Report

Orbit 51627

Creation date: 2025-04-15T12:54:18.391462
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/AS1A13_037T05_9000006460_51627cztM0_level2.fits modeM0/AS1A13_037T05_9000006460_51627cztM0_level2_quad_clean.evt
Size (bytes)482,549,76098,893,440
Size460.2 MB 94.3 MB
Events in quadrant A4,599,379630,233
Events in quadrant B4,698,769684,645
Events in quadrant C3,974,782628,162
Events in quadrant D4,061,811578,356

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A090
B090
C090
D090

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0181997
B0185241
C0165291
D0167531

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01380
B01380
C01380
D01380

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A67894756.996612%
B67894216.201208%
C67892834.168508%
D67893805.597290%

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 7754 6790 251 251 3.24% 3.70%
B 7754 6790 209 209 2.70% 3.08%
C 7754 6790 175 175 2.26% 2.58%
D 7754 6790 219 219 2.82% 3.23%

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 7 64 899749 4924.28 753 735 182.6
A 12 3 192796 1052.0 753 735 182.6
A 5 240 115273 627.37 753 735 182.6
B 5 172 733594 4555.01 751 726 160.9
B 5 185 155816 963.93 751 726 160.9
B 4 174 132181 817.03 751 726 160.9
C 15 189 366258 1805.57 741 736 202.4
C 13 3 154141 757.77 741 736 202.4
C 10 19 138573 680.87 741 736 202.4
D 8 176 683801 3371.14 729 703 202.6
D 1 3 100551 492.76 729 703 202.6
D 2 249 86184 421.85 729 703 202.6

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