ASTROSAT CZTI

Data Quality Report

Orbit 55600

Creation date: 2026-01-07T21:58:58.998709
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_021T06_9000006538_55600cztM0_level2.fits modeM0/AS1A14_021T06_9000006538_55600cztM0_level2_quad_clean.evt
Size (bytes)1,262,920,320271,010,880
Size1.2 GB 258.5 MB
Events in quadrant A13,882,7961,714,699
Events in quadrant B10,351,0781,889,666
Events in quadrant C10,827,2001,649,263
Events in quadrant D10,172,0821,602,824

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0140
B0140
C0140
D0140

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0554123
B0450273
C0475403
D0447993

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03980
B03980
C03980
D03980

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A195868564.370469%
B195874352.220861%
C195876823.481901%
D195871640.837290%

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 20941 19589 726 726 3.47% 3.71%
B 20942 19591 171 171 0.82% 0.87%
C 20942 19591 404 404 1.93% 2.06%
D 20942 19591 104 104 0.50% 0.53%

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 12 115 3151852 6443.61 1986 1937 488.8
A 8 249 1596030 3260.95 1986 1937 488.8
A 3 14 843213 1720.95 1986 1937 488.8
B 5 236 996379 2360.45 1992 1913 421.3
B 5 185 325125 767.17 1992 1913 421.3
B 5 172 241624 568.97 1992 1913 421.3
C 9 38 1504510 2819.18 1958 1937 533.0
C 14 254 429804 802.78 1958 1937 533.0
C 6 223 384343 717.48 1958 1937 533.0
D 11 129 1068162 1919.19 1969 1878 555.6
D 2 62 392304 702.72 1969 1878 555.6
D 5 173 177696 316.45 1969 1878 555.6

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