ASTROSAT CZTI

Data Quality Report

Orbit 20180828_A04_100T01_9000002336_level2

Creation date: 2025-11-24T07:15:20.538089
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/AS1A04_100T01_9000002336cztM0_level2.fits modeM0/AS1A04_100T01_9000002336cztM0_level2_quad_clean.evt
Size (bytes)1,334,828,1601,384,525,440
Size1.2 GB 1.3 GB
Events in quadrant A8,027,7728,237,447
Events in quadrant B7,766,4828,326,218
Events in quadrant C8,030,9608,232,139
Events in quadrant D6,992,1827,530,542

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A028540
B028540
C028540
D028540

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02935110
B03100220
C02927380
D02967820

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02240
B02240
C02240
D02240

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A14021819491.389978%
B14021825881.845697%
C14021822911.633884%
D14021816241.158197%

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 162773 140217 0 0 0.00% 0.00%
B 162773 140216 0 0 0.00% 0.00%
C 162773 140217 0 0 0.00% 0.00%
D 162773 140219 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 7875 11.42 2092 1963 517.8
A 7 110 6531 8.82 2092 1963 517.8
A 15 236 6122 8.03 2092 1963 517.8
B 2 9 6451 11.21 2058 1962 400.4
B 2 8 5372 8.52 2058 1962 400.4
B 3 17 5126 7.9 2058 1962 400.4
C 12 241 5641 6.77 2123 1980 541.1
C 3 126 5397 6.32 2123 1980 541.1
C 2 191 5340 6.21 2123 1980 541.1
D 3 14 5201 6.43 1996 1816 526.0
D 6 231 5034 6.12 1996 1816 526.0
D 7 3 4873 5.81 1996 1816 526.0

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