ASTROSAT CZTI

Data Quality Report

Orbit 20171128_G08_006T03_9000001732_level2

Creation date: 2025-11-18T19:19:34.330001
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/AS1G08_006T03_9000001732cztM0_level2.fits modeM0/AS1G08_006T03_9000001732cztM0_level2_quad_clean.evt
Size (bytes)371,041,920385,392,960
Size353.9 MB 367.5 MB
Events in quadrant A2,243,1642,354,895
Events in quadrant B2,138,7212,289,929
Events in quadrant C2,282,8942,312,923
Events in quadrant D1,949,1922,091,095

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0896290
B01054590
C0776470
D0916230

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0800
B0800
C0800
D0800

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A07780
B07780
C07780
D07780

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A381844511.181123%
B3817224286.360683%
C381851020.267121%
D381775811.521859%

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 46288 38191 0 0 0.00% 0.00%
B 46288 38173 0 0 0.00% 0.00%
C 46288 38191 0 0 0.00% 0.00%
D 46288 38191 0 0 0.00% 0.00%

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 0 29 2228 11.64 585 555 143.8
A 7 110 1923 9.51 585 555 143.8
A 9 19 1749 8.3 585 555 143.8
B 2 9 1828 11.63 565 543 110.5
B 3 17 1503 8.69 565 543 110.5
B 12 226 1399 7.75 565 543 110.5
C 1 81 1743 7.49 603 566 157.2
C 1 80 1689 7.14 603 566 157.2
C 1 65 1592 6.52 603 566 157.2
D 3 14 1419 6.19 556 509 147.0
D 6 67 1398 6.05 556 509 147.0
D 7 3 1396 6.03 556 509 147.0

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